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Let Property Campaign Disclosure: How Should Landlords Deal With Missing Rental Records?

A cluttered desk with a messy shoebox of receipts, an open laptop showing a spreadsheet being filled in, and a bank statement — conveying the process of reconstructing missing records.

One of the most common reasons landlords put off making a Let Property Campaign disclosure isn’t reluctance — it’s fear that they simply don’t have the paperwork to back it up. Old tenancy agreements have been lost, bank accounts have been closed, and receipts for repairs from six years ago were never kept. The reassuring truth is that missing records don’t stop you from making a valid disclosure; HMRC expects landlords in this position and accepts carefully reasoned estimates, provided they’re built on a sensible method rather than guesswork.

Missing paperwork doesn’t have to hold up your disclosure. Book a free 15-minute consultation with Felix Accountants and we’ll help you map out exactly what you can reconstruct. Grab a free slot here.

Why Missing Records Are So Common Among Landlords Disclosing Under the LPC

Most landlords who end up using the Let Property Campaign weren’t running a professional letting business from day one. Many became landlords by accident — inheriting a property, relocating for work, or renting out a former family home — and never set up formal bookkeeping. Years later, when it’s time to disclose, bank statements have often been archived beyond easy online access, letting agents have changed hands, and receipts were simply thrown away. This is normal, and it’s exactly the scenario HMRC’s disclosure process is built to accommodate.

Start With What You Can Actually Access

Before assuming records are gone for good, it’s worth checking a few sources that are often more complete than landlords expect:

  • Online banking archives: most UK banks retain digital statements for 6–7 years and can often provide older statements on request, sometimes for a small fee
  • Letting agent portals or year-end statements: agents typically issue annual income summaries, which are far easier to request than reconstructing every transaction
  • Mortgage statements: useful for establishing the interest paid, which is a major allowable cost
  • Insurance renewal documents: confirm landlord insurance costs and the dates the property was actually let
  • Land Registry and conveyancing paperwork: confirms purchase date, sale date (if applicable), and ownership history

Our guide to record keeping sets out the categories of documents HMRC typically expects landlords to retain, and is a useful checklist even when working backwards from an incomplete starting point.

When Records Genuinely Don’t Exist: Building a Reasonable Estimate

Where source documents can’t be recovered, HMRC allows landlords to use reasonable estimates, as long as the method is transparent and defensible. A sound approach usually involves:

  • Establishing the letting period from tenancy start/end dates, Land Registry records, or correspondence with a former letting agent
  • Using average local market rents for a comparable property over the relevant years as a cross-check against any partial records you do have
  • Applying a consistent, conservative approach to expenses — only claiming costs you can reasonably evidence or that are typical and proportionate for the property type
  • Documenting the assumptions behind every estimate in writing, so the methodology can be explained if HMRC asks questions later

This is where working with an accountant experienced in Let Property Campaign disclosures makes a real difference. We’ve supported landlords who arrived with almost nothing beyond a mortgage statement and a rough idea of when tenants moved in, and helped them build a disclosure that HMRC accepted without further challenge.

Missing Records Don’t Change Your Look-Back Period

It’s worth being clear that having incomplete records doesn’t reduce how many years you need to disclose. The look-back period is determined by the reason the income wasn’t declared — careless error, failure to take reasonable care, or deliberate non-disclosure — not by how much paperwork survives. Our article on how many years you need to declare explains this in more detail, and it’s a good starting point before you begin reconstructing figures, so you know exactly which tax years to focus on.

The 90-Day Window and Why Preparation Matters

Once you notify HMRC of your intention to disclose under the Let Property Campaign, you generally have 90 days to submit the full disclosure and calculate what’s owed. Trying to reconstruct several years of missing records within that window, under time pressure, is far harder than starting the reconstruction work before you notify HMRC. Our 90-day deadline prep guide walks through how to use that period efficiently if you’ve already notified, but the ideal approach is to begin gathering what you can before you formally start the clock.

What Counts as a Reasonable Excuse — and What Doesn’t

Missing records themselves aren’t usually accepted as a reason not to disclose at all, but the circumstances behind why records went missing can matter for how HMRC views your overall behaviour. Genuinely losing paperwork in a house move, a bereavement, or simply never having set up formal bookkeeping as an accidental landlord is treated very differently from deliberately destroying evidence. Being upfront about why records are incomplete, rather than presenting rough figures as if they were exact, tends to support a smoother disclosure.

Common Mistakes to Avoid When Records Are Incomplete

  • Rounding figures without any supporting logic, rather than using a documented estimation method
  • Ignoring years where you’re unsure of the exact rent, hoping HMRC won’t notice — this significantly increases risk if discovered later
  • Claiming expenses you can’t reasonably evidence or that seem disproportionate to the size of the letting
  • Waiting indefinitely to “find better records” instead of starting the disclosure with a reasonable, well-documented estimate

See our broader guide on the top bookkeeping mistakes landlords make for related pitfalls worth avoiding going forward.

How Felix Accountants Helps When Your Records Are Incomplete

We regularly work with landlords who come to us with partial, patchy, or almost non-existent records for the years in question. Our process involves piecing together what’s available, applying recognised estimation techniques where genuine gaps exist, and preparing a disclosure that stands up to scrutiny. You can read more in our LPC disclosure guide or get in touch directly to talk through your specific situation.

Frequently Asked Questions

Can I make a Let Property Campaign disclosure without any bank statements?

Yes, in principle. If bank statements aren’t available, other evidence such as letting agent statements, tenancy agreements, or a reasonable, documented estimate based on comparable market rents can be used instead.

Will HMRC reject my disclosure if some figures are estimates?

Not usually, provided the estimates are reasonable, consistently applied, and clearly explained as estimates rather than presented as exact figures without qualification.

Should I wait until I’ve found all my missing records before notifying HMRC?

Generally no. It’s better to begin the record-reconstruction process first, then notify HMRC once you have a workable picture, since the 90-day disclosure window starts as soon as you notify.

Does having incomplete records mean I’ll face higher penalties?

Not on its own. Penalties are primarily driven by whether the disclosure is prompted or unprompted and the underlying behaviour (careless versus deliberate), not simply by the state of your paperwork.

Can an accountant help reconstruct years of missing rental records?

Yes, this is one of the most valuable parts of working with an experienced property accountant during a Let Property Campaign disclosure, as we can apply consistent, defensible methods across multiple tax years.

Don’t let missing paperwork stop you from disclosing. Book your free 15-minute consultation with Felix Accountants and we’ll help you build a disclosure that works with what you actually have.


 

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Articles Articles Corporation Tax

Accounting Profit vs Taxable Profit: Corporation Tax Explained

accounting profit vs taxable profit

If you’ve ever looked at your company’s profit and loss account and then been surprised by the Corporation Tax bill that follows, you’re not alone. The profit in your accounts and the profit HMRC actually taxes are rarely the same figure, and understanding why is one of the most useful things a director can learn about how Corporation Tax actually works.

Want a second opinion on your Corporation Tax computation before you file? Book a free 15-minute consultation with Felix Accountants and we’ll take a look.

What Is Accounting Profit?

Accounting profit is the figure shown in your statutory accounts, prepared under standard accounting frameworks such as FRS 102 or FRS 105. It reflects your income less all costs recognised during the accounting period, including things like depreciation, which spreads the cost of an asset over its useful life for accounting purposes.

What Is Taxable Profit?

Taxable profit — more precisely, “taxable total profits” for Corporation Tax purposes — starts with your accounting profit and adjusts it according to tax law. Some costs that are perfectly valid in your accounts simply aren’t deductible for tax, and some tax reliefs don’t appear in your accounts at all. The result, after these adjustments, is the figure your Corporation Tax is actually calculated on.

Why Depreciation Gets Added Back

Depreciation is an accounting estimate of how an asset loses value over time, and estimates aren’t something tax law is willing to rely on directly. Instead, depreciation is added back in full in the tax computation, and capital allowances — a set of HMRC-defined rates and allowances — are used instead to give tax relief on qualifying capital expenditure. The Annual Investment Allowance, for example, currently allows many businesses to deduct the full cost of qualifying plant and machinery in the year of purchase, up to a set limit, with writing down allowances covering amounts above that.

Common Disallowable Expenses

Beyond depreciation, several other costs that appear in your accounts must be added back because they aren’t allowable for Corporation Tax:

  • Client entertainment costs
  • Fines and penalties, including parking tickets and HMRC penalties
  • Costs that don’t meet the “wholly and exclusively” test for business purposes
  • Certain provisions that haven’t yet crystallised into an actual liability

For a fuller list of what is and isn’t deductible for a limited company, see our guide to allowable limited company expenses.

A Worked Example

ItemAmount
Profit per accounts£60,000
Add back: depreciation+£8,000
Add back: client entertaining+£1,200
Less: capital allowances-£6,500
Taxable total profits£62,700

Notice that the taxable figure here is higher than the accounting profit, even though the company hasn’t earned any additional cash — it’s purely the effect of the add-backs and reliefs working differently in the two calculations. In other cases, generous capital allowances can push taxable profit below accounting profit instead.

Why This Distinction Matters for Directors

Understanding the gap between accounting and taxable profit matters for more than just curiosity. It affects how much cash you should be setting aside for your Corporation Tax bill, and it’s also a completely separate question from how much profit is legally available to pay out as dividends, which is governed by company law and your accounting profit and reserves, not your tax computation. Paying dividends from profits that don’t actually exist can result in an illegal dividend — our guide on illegal dividends explains this risk in more detail.

Common Misunderstandings

  • Assuming your Corporation Tax bill should match a simple percentage of your accounting profit
  • Forgetting that capital expenditure isn’t deducted as it’s spent, but relieved through capital allowances instead
  • Treating distributable reserves and taxable profit as the same thing when deciding on dividends
  • Missing available reliefs, such as R&D relief, because they don’t automatically appear in the accounting figures

How Felix Accountants Can Help

We prepare Corporation Tax computations that correctly reconcile your accounting profit to your taxable profit, make sure you’re claiming every allowance and relief you’re entitled to, and help you plan cash flow around your actual tax liability rather than guesswork.

Frequently Asked Questions

Why is my Corporation Tax bill higher than expected based on my accounts?

This usually happens because disallowable expenses, like depreciation or client entertaining, have been added back in the tax computation, increasing your taxable profit above your accounting profit.

Do capital allowances always reduce my tax bill more than depreciation would?

Not necessarily in every year, but capital allowances are the only mechanism HMRC recognises for tax relief on capital expenditure, so understanding and claiming them correctly is essential regardless of how they compare to your accounting depreciation charge in any given year.

Can I pay dividends based on my accounting profit even if my taxable profit is lower?

Dividends must be paid from distributable reserves under company law, which relate to your accounting position, not your taxable profit figure. The two calculations serve different purposes and shouldn’t be confused when deciding what can legally be paid out.

Does every company need a formal tax computation separate from its accounts?

Yes. Even small companies need to prepare a Corporation Tax computation that adjusts accounting profit for tax purposes as part of the CT600 filing process, regardless of how straightforward the underlying accounts are.

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Articles Articles Blogs Self Assessment Taxation Services

What Happens If You Discover an Error in a Previous UK Tax Return?

Self Assessment : A person reviewing a printed tax return with a red pen and calculator, looking thoughtful rather than stressed

Spotting a mistake on a tax return you’ve already submitted is more common than you might think — a missed expense, an omitted source of income, or a figure that simply doesn’t add up. The important thing is what you do next, because HMRC treats a self-corrected error very differently from one it uncovers itself.

Not sure whether you’re still within the amendment window, or how to approach HMRC about an older error? Book a free 15-minute consultation with Felix Accountants and we’ll help you work out the best next step.

Step One: Work Out Which Deadline Applies

How you correct the error depends on how long ago you filed the return in question.

Within 12 Months of the Filing Deadline

If you’re within 12 months of the normal Self Assessment filing deadline for that return, you can simply amend it yourself. For an online return, log back into your HMRC account, update the relevant figures, and resubmit — the system recalculates your bill automatically, showing whether you owe more or are due a refund. For example, a 2024/25 return filed by the 31 January 2026 deadline can generally be amended up to 31 January 2027.

More Than 12 Months After the Deadline

Once the 12-month window has closed, you can no longer amend the return online. Instead, you’ll need to write to HMRC explaining the correction, or make a formal overpayment relief claim if the error means you paid too much tax. Overpayment relief claims can generally be made up to four years after the end of the tax year the return relates to.

What to Include in a Written Correction or Overpayment Relief Claim

  • The tax year the correction relates to
  • A clear explanation of what was wrong and why
  • The amount you believe was overpaid or underpaid
  • Supporting evidence (invoices, statements, calculations)
  • A signed declaration confirming the details are correct and complete to the best of your knowledge

If the Error Means You Owe More Tax

If correcting the mistake increases your tax bill, it’s best to notify HMRC and pay the difference as soon as you’re aware of it. Interest accrues from the original due date, and coming forward yourself, before HMRC identifies the discrepancy independently, generally puts you in a much stronger position on penalties than waiting to be caught out. This is the same underlying principle behind voluntary disclosure routes like the Let Property Campaign for landlords with undeclared rental income specifically.

If the Error Means You Overpaid

If you’re due a refund, amending within the 12-month window is the most straightforward route — HMRC recalculates your position and processes the repayment. Outside that window, an overpayment relief claim achieves the same result but requires a more formal written submission with supporting evidence.

Genuine Mistakes vs Careless or Deliberate Errors

HMRC distinguishes between an honest, reasonable mistake and one caused by carelessness or deliberate action, and this distinction affects whether a penalty applies at all. If you took reasonable care and made a genuine error in good faith, you’re unlikely to face a penalty for correcting it — HMRC generally responds far more favourably to taxpayers who put things right themselves. If the error was significant, spanned several years, or involved undeclared income you knew about, professional advice is worth getting before you approach HMRC, since the correct classification affects both the penalty and how many years need correcting.

What If HMRC Corrects the Error First?

HMRC can amend a return itself within nine months of the date you filed it, typically to correct obvious errors, and will notify you of any change. If HMRC identifies a more significant discrepancy through a compliance check, the process moves from a simple correction into a formal enquiry, and the potential penalties for the same underlying mistake are usually higher than if you’d corrected it proactively.

A Practical Example

Suppose you filed your 2023/24 return in January 2025 and later realise, in mid-2026, that you forgot to include some rental income. Since more than 12 months have passed since the 31 January 2025 deadline, you can’t amend the return online — you’d need to write to HMRC, or, if the omission relates to rental income specifically, consider whether the Let Property Campaign disclosure process is the more appropriate route, since it’s specifically designed for this kind of correction.

How Felix Accountants Can Help

Whether you’re inside the 12-month amendment window or need to make a formal overpayment relief claim or voluntary disclosure, we’ll help you work out the right process, prepare accurate figures, and manage the correspondence with HMRC on your behalf.

Frequently Asked Questions

How long do I have to amend a Self Assessment tax return?

You generally have 12 months from the normal filing deadline for that tax year. For example, a return with a 31 January 2027 deadline can usually be amended up to 31 January 2028.

What is overpayment relief?

Overpayment relief is a formal claim you can make to recover tax you’ve overpaid, once the standard 12-month amendment window has passed. It must generally be made within four years of the end of the relevant tax year and requires a written submission with supporting evidence.

Will I be penalised for correcting my own mistake?

If the error was a genuine mistake made despite taking reasonable care, a penalty is unlikely. Penalties are more commonly applied where HMRC considers the error careless or deliberate, and coming forward yourself before HMRC identifies the issue generally results in a lower penalty than waiting.

Can HMRC change my tax return without telling me?

HMRC can make certain corrections within nine months of your filing date, but it will notify you of any change made. Anything beyond a simple correction, such as a discrepancy found through a compliance check, involves a more formal process where you’re kept informed and can respond.

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Articles Articles Blogs Self-Assessment Taxation Services

Self Assessment for First-Time Taxpayers: How to Register and File Your First Return

Self-Assessment: A young professional at a laptop with a UK tax return form and a cup of coffee, calm and organised desk setup

Filing a Self Assessment tax return for the first time can feel intimidating, mostly because nobody explains the process until you’re already up against a deadline. The good news is that once you understand the sequence — register, get your reference number, then file — it’s a manageable, one-time learning curve.

If you’d rather have someone check your registration and return before you submit, book a free 15-minute consultation with Felix Accountants — it’s a quick way to make sure your first return is right.

Who Needs to Register for Self Assessment?

You generally need to register if, in the tax year in question, you had income from self-employment over £1,000, rental income, foreign income, capital gains, dividends or savings above certain thresholds, or if you need to pay the High Income Child Benefit Charge. Self Assessment isn’t limited to the self-employed — many first-time filers are landlords, company directors, or people with a side income alongside employment.

The Registration Deadline

If you need to file for the first time, you must register with HMRC by 5 October following the end of the tax year in which the income arose. For example, if you started earning untaxed income at any point between 6 April 2025 and 5 April 2026 (the 2025/26 tax year), you need to register by 5 October 2026. Miss this and you can still register late, but you risk penalties if it causes you to miss the return deadline too.

How to Register: Step by Step

  1. Decide your category. HMRC’s registration route differs slightly depending on whether you’re self-employed, a landlord, a partner in a business, or none of the above but still need to file.
  2. Register online with HMRC. Use the appropriate GOV.UK registration service for your circumstances and set up a Government Gateway account or sign in with GOV.UK One Login.
  3. Receive your Unique Taxpayer Reference (UTR). HMRC posts this, usually within around 10 working days in the UK (longer if you’re abroad). You cannot file a return without it.
  4. Activate your online account. A separate activation code arrives by post, which you’ll need to complete sign-in for the online filing service.
  5. Set up your personal tax account. This is worth doing early — see our guide on how to set up your personal tax account for the details.

Filing Deadlines You Need to Know

DeadlineWhat it’s for
5 OctoberRegister for Self Assessment for the tax year just ended
31 OctoberPaper return deadline
31 January (following year)Online return deadline and balancing payment due

Our guide to the UK tax year and key dates covers how these deadlines fit into the wider tax calendar, including payments on account.

What Happens If You Miss the Deadline?

Missing the registration deadline alone doesn’t always trigger an automatic penalty, particularly if you don’t end up owing tax. Missing the filing deadline is different: HMRC applies an automatic £100 penalty even if you owe no tax, rising to daily penalties after three months. Full details are in our article on HMRC’s £100 fine for missing the tax deadline.

Common First-Time Filer Mistakes

  • Leaving registration until September or October and getting caught out by UTR postal delays
  • Not keeping records of income and expenses from day one, making the return far harder to complete accurately
  • Forgetting to declare all sources of income, not just the “main” one — for example, a small amount of rental income alongside employment
  • Assuming Self Assessment is only for the self-employed and missing the deadline as a first-time landlord
  • Not budgeting for payments on account, which can catch new filers by surprise in year two

Record-Keeping From the Start

Good record-keeping makes your first return far less stressful and gives you a solid foundation for every year after. Keep invoices, receipts, bank statements and any correspondence relevant to your income and expenses as you go, rather than trying to reconstruct a year’s activity in January.

How Felix Accountants Can Help

We help first-time filers register correctly, understand what they can and can’t claim, and get their first return submitted well ahead of the deadline — taking the guesswork out of a process that only gets easier the second time around.

Frequently Asked Questions

How long does it take to get a UTR number?

HMRC typically posts your Unique Taxpayer Reference within around 10 working days if you’re in the UK, or up to 21 working days if you’re abroad. It’s sensible to register well before the 5 October deadline to allow for this.

Do I need to register for Self Assessment if I’m already employed and pay tax through PAYE?

Yes, if you have additional untaxed income — such as self-employment earnings, rental income, or significant dividends — on top of your PAYE employment. Self Assessment and PAYE aren’t mutually exclusive.

What if I register late?

You can still register after 5 October, but if this causes you to also miss the filing deadline, you may face penalties. It’s best to register as soon as you realise you need to, rather than waiting.

Can I file my first return on paper instead of online?

Yes, but the paper deadline (31 October) is earlier than the online deadline (31 January), so most first-time filers find it easier to register for online filing.

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Articles Articles Blogs Let Property Campaign News

Let Property Campaign: Can You Disclose Rental Income From a Property You No Longer Own?

"SOLD" estate agent board outside a UK terraced house, with a faded overlay of a self-assessment tax return and calculator in the foreground, symbolising disclosure after a sale.

If you used to let out a property but have since sold it, gifted it, or moved back in yourself, you might assume that any undeclared rental income from those years is now somehow out of reach of HMRC. It isn’t. The good news is that selling the property doesn’t close the door on putting things right — you can still use the HMRC Let Property Campaign to disclose rental income from a property you no longer own, and doing so voluntarily is almost always better than waiting to be found.

Not sure where you stand with a property you’ve already sold? Book a free 15-minute consultation with Felix Accountants and we’ll talk through your situation in plain English, with no obligation. Reserve your free call here.

Does Selling a Rental Property Remove Your Obligation to Declare Past Rent?

No. Your obligation to report rental income relates to the tax years in which you actually received that income, regardless of whether you still own the property today. If you let out a property between, say, 2019 and 2023 and then sold it, you were still legally required to report the rent you received during those years on a Self Assessment tax return. Selling the property doesn’t erase that history — it simply means the disclosure now covers a property that no longer appears on your current asset list.

This is one of the most common misunderstandings we see at Felix Accountants. Landlords often believe that once a property is sold, any loose ends relating to it are automatically tidied up. In reality, HMRC’s Let Property Campaign was specifically designed to capture exactly this kind of situation — current landlords, former landlords, and anyone in between with unreported letting income.

Who Can Use the Let Property Campaign for a Former Rental Property?

The Let Property Campaign is open to individual landlords who have received undeclared rental income from residential property in the UK or abroad. This includes people who:

  • Sold the rental property some years ago but never declared the rent received while they owned it
  • Inherited a property, let it out for a period, and later sold it
  • Moved back into a property that was previously let to tenants
  • Gifted or transferred a rental property to a family member and stopped receiving rent from it
  • Were an accidental landlord for a short period before selling

In every one of these cases, the fact that the property has moved on doesn’t change the underlying tax history. What matters to HMRC is the income you received while you owned and let the property, not whether you still hold the title today.

How Far Back Do You Need to Declare?

The look-back period depends on why the income wasn’t declared in the first place, not on when you sold the property. As a general guide:

  • Genuine, careless error: typically up to 4–6 years
  • Failure to take reasonable care: up to 6 years
  • Deliberate non-disclosure: HMRC can go back as far as 20 years

We’ve written a more detailed breakdown of this in our guide on how many years you need to declare and our companion article on how many years of rental income landlords must disclose. If the property has since been sold, you’ll still need to work out the correct number of years based on when you first started letting it and when the undeclared income actually stopped, which for a sold property is usually the completion date.

What About Capital Gains Tax on the Sale Itself?

A disclosure through the Let Property Campaign covers rental income and any related expenses, not the sale of the property. However, if you sold the property at a profit, you may separately owe Capital Gains Tax on that sale, and UK residential property sales generally need to be reported to HMRC within 60 days of completion. If both the rental income and the sale itself were never reported, it’s sensible to deal with both matters together rather than treating them as separate problems, since HMRC will often be looking at your full history once a disclosure is opened.

Why Voluntary Disclosure Still Matters After the Sale

Coming forward voluntarily, before HMRC contacts you, generally results in significantly lower penalties than a prompted disclosure that follows an HMRC letter or enquiry. Our article on prompted versus unprompted disclosures sets out the practical difference in more detail, but the short version is this: HMRC has extensive data-matching capability drawn from Land Registry records, Stamp Duty Land Tax returns, letting agent reporting and platforms such as Airbnb, so a sold property is not invisible simply because you no longer own it. Making the first move, through our voluntary disclosure guidance, gives you more control over the outcome, the tone of the process and the penalty percentage applied.

What You’ll Need to Gather

Because you no longer own the property, you may not have easy access to the same records a current landlord would. It’s still worth trying to pull together:

  • Bank statements showing rent received during the letting period
  • Tenancy agreements or letting agent statements, if available
  • Records of allowable expenses such as mortgage interest, insurance, repairs and letting agent fees
  • The completion date of the sale, and the purchase and sale prices, in case a Capital Gains Tax position also needs reviewing

If some records are missing entirely, that’s a common and manageable problem — HMRC accepts reasonable estimates provided they’re clearly labelled and based on a sensible methodology, rather than guesswork presented as fact.

How Felix Accountants Can Help

We regularly help former landlords work through reporting undisclosed rental income to HMRC, including cases where the property has already been sold, gifted, or repossessed. We’ll help you reconstruct a reasonable income and expense history, calculate what’s owed, and manage the notification and disclosure process on your behalf so you’re not dealing with HMRC directly and unrepresented.

Frequently Asked Questions

Can I still be investigated if I sold the rental property years ago?

Yes. HMRC’s ability to open an enquiry into undeclared rental income isn’t affected by a subsequent sale. The tax liability relates to the years you received the income, and HMRC can pursue this regardless of your current ownership status.

Do I need to disclose if the rental profit was very small?

Generally yes. There’s no minimum threshold that exempts small amounts of rental profit from disclosure, although your allowable expenses and personal allowance may mean little or no tax is ultimately due once everything is calculated correctly.

What if I can’t find all my old records for a property I no longer own?

This is common, particularly for properties sold some years ago. HMRC accepts reasonable, clearly explained estimates where original records aren’t available. An accountant experienced with the Let Property Campaign can help you build a defensible estimate.

Will disclosing affect the sale I’ve already completed?

No. The sale itself is a separate, completed transaction. A Let Property Campaign disclosure deals with the historic rental income tax position and won’t unwind or affect the property sale.

Is it too late to make a voluntary disclosure?

It’s rarely too late to disclose voluntarily unless HMRC has already contacted you about the specific property. Acting before any HMRC letter arrives keeps your disclosure classed as unprompted, which generally attracts lower penalties.

Ready to sort out a property you’ve already sold? Felix Accountants specialises in Let Property Campaign disclosures for current and former landlords. Book your free 15-minute consultation and let’s work out exactly where you stand.


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Articles Articles Blogs Let Property Campaign

Let Property Campaign Airbnb and Short-Term Rentals Eligibility

Let Property Campaign : A modern city apartment set up for short-term guests, with a laptop showing a booking calendar on the table
Let Property Campaign : A modern city apartment set up for short-term guests, with a laptop showing a booking calendar on the table

Airbnb and other short-term letting platforms now report host income directly to HMRC, so if you’ve been treating your listing as “just a bit of extra cash” rather than taxable rental income, it’s worth checking your position carefully. A common question we hear is whether the Let Property Campaign can be used to put things right — and the answer is generally yes, but with some important nuances.

Unsure whether your Airbnb income should have been declared, or how far back you need to go? Book a free 15-minute call with Felix Accountants to talk it through confidentially.

Is Airbnb Income Taxable?

Yes. Income from letting a property, or even a spare room, on a short-term basis is taxable in the same way as any other rental income, subject to any reliefs you’re entitled to. The only exceptions are the £1,000 property allowance (if your gross rental income is below that threshold) and the Rent a Room Scheme, which lets you earn up to £7,500 tax-free from letting a room in your own home, provided you live there too.

Does the Let Property Campaign Cover Short-Term Lets?

The LPC applies to individual landlords with undeclared tax on residential property income, and this generally includes short-term and holiday-style lettings of residential property, whether booked through Airbnb, Booking.com, Vrbo or direct. What matters for eligibility is that the property is held personally, not through a limited company, and that the income is genuinely rental-style rather than a trading business involving substantial additional services such as daily cleaning, meals or reception.

If your short-term letting activity has grown into something closer to running a guest house, with significant services provided, HMRC may view it as a trade rather than a property business, which changes how it’s taxed and may take it outside the scope of the LPC. This is a grey area worth getting professional input on before you disclose.

What Changed With Furnished Holiday Lets?

Until 6 April 2025, properties meeting certain letting and availability conditions could qualify as Furnished Holiday Lets (FHLs), unlocking more generous tax treatment, including fuller mortgage interest relief and access to certain capital allowances. That regime was abolished from the 2025/26 tax year, and short-term let income is now taxed under the same rules as standard rental property income, including the mortgage interest restriction that already applied to other landlords. If you’ve been disclosing historic years, it’s important to apply the rules that were in force for each specific tax year rather than today’s rules retrospectively.

How Far Back Do You Need to Go?

As with any Let Property Campaign disclosure, the number of years you need to cover depends on your behaviour: whether the non-disclosure was a genuine, reasonable mistake, careless, or deliberate. Our guide on how many years of rental income landlords must disclose sets out the general time limits in more detail.

Accidental Hosts and First-Time Disclosures

Many people who let out a property short-term didn’t set out to become landlords in the tax sense — perhaps you started renting a spare property while working away, or began hosting guests after downsizing. If that sounds like you, our page on becoming an accidental landlord covers how HMRC treats these situations and what you need to do to get compliant.

Practical Steps If You Haven’t Declared Airbnb Income

  • Pull together booking records, payout statements and platform tax summaries for each relevant tax year
  • Work out which years the Furnished Holiday Let rules did or didn’t apply, since this affects your allowable deductions
  • Check whether the Rent a Room Scheme or property allowance already covers part of your income
  • Consider whether your behaviour is likely to be classed as careless or deliberate, since this affects the penalty rate and the years you must disclose
  • Make your disclosure before HMRC contacts you, to secure unprompted disclosure treatment and a lower penalty

Common Mistakes Hosts Make

The most frequent error we see is hosts assuming that because Airbnb “already takes its cut” or issues a summary, the income has somehow already been reported to HMRC on their behalf. It hasn’t — platform reporting to HMRC is a compliance tool for HMRC, not a substitute for your own Self Assessment return. Another common mistake is applying FHL-style deductions to years after the regime ended, which can trigger its own correction later.

How Felix Accountants Can Help

We regularly help hosts and landlords work out exactly what’s owed across multiple tax years, apply the correct rules for each year, and submit an accurate Let Property Campaign disclosure that stands up to HMRC scrutiny.

Frequently Asked Questions

Do I need to declare Airbnb income if I only host occasionally?

If your gross rental income from all sources is under £1,000 in a tax year, the property allowance may mean you don’t need to declare it. Above that, it generally needs to be reported, even if hosting is occasional.

Can I still get Furnished Holiday Let tax treatment for a current listing?

No. The Furnished Holiday Let regime was abolished from 6 April 2025, so short-term let income from the 2025/26 tax year onward is taxed under the standard property income rules.

Does the Let Property Campaign cover overseas short-term lets?

It can, in certain circumstances, though overseas income brings in additional considerations such as double taxation relief. It’s best to get specific advice if your undeclared income relates to a property outside the UK.

What if my short-term letting is really more like running a guest house?

If you provide substantial additional services, HMRC may treat the activity as a trade rather than a property business, which can affect both how it’s taxed and whether the Let Property Campaign is the right disclosure route.

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Let Property Campaign vs HMRC Tax Investigation

A calm landlord reviewing paperwork at a desk, with two signposted paths in the background labelled subtly to represent "voluntary disclosure" and "investigation"

If you’ve fallen behind on declaring rental income, you’ve probably come across two very different-sounding terms: the Let Property Campaign and an HMRC tax investigation. They can lead to the same place — you paying the tax you owe — but the route, the paperwork, and crucially the penalties can be worlds apart depending on which one applies to your situation.

 

Not sure which route applies to you, or whether you should come forward before HMRC contacts you? Book a free 15-minute consultation with Felix Accountants and we’ll talk through your specific circumstances, in confidence, with no obligation.

What Is the HMRC Let Property Campaign?

The Let Property Campaign (LPC) is a voluntary disclosure facility that HMRC has run since 2013. It allows individual UK landlords with undeclared or under-declared rental income to come forward, calculate what they owe, and pay it — usually on more favourable terms than if HMRC discovered the problem itself. It applies to residential property income only; landlords holding property through a limited company or trust cannot use the LPC.

Once you notify HMRC of your intention to disclose, you’re generally given 90 days to work out the tax, interest and any penalty due and submit your disclosure. It’s a structured, self-managed process, and it is entirely optional — nobody forces you into the LPC.

What Is an HMRC Tax Investigation?

A tax investigation, by contrast, is something HMRC initiates. It isn’t voluntary, and once it starts, you lose control over the pace and shape of the process. There are two versions worth understanding.

Formal Compliance Checks and Enquiries

These are opened when HMRC has reason to believe a return is wrong — often triggered by data mismatches from sources like the Land Registry, letting agents, mortgage lenders or short-term letting platforms. HMRC will typically request records, ask questions, and can go back several years depending on the behaviour involved.

Code of Practice 9 (COP9)

Code of Practice 9 is reserved for cases where HMRC suspects deliberate tax fraud. It’s a civil process, offered as an alternative to criminal prosecution, but it requires you to sign a formal contract admitting to any deliberate wrongdoing and disclose everything in full. It carries much higher stakes than either the LPC or a standard compliance check, and professional representation is essential from the outset.

Key Differences at a Glance

FactorLet Property CampaignHMRC Tax Investigation
Who starts itYou, voluntarilyHMRC
Typical penalty range (careless error)0% to 30% (often much lower when unprompted)15% to 30% or higher, since the disclosure counts as prompted
Who controls the paceYou, within the 90-day windowHMRC
Public “naming and shaming” riskVery low, if full and accuratePossible for serious, deliberate cases
Available for companies/trustsNoYes

Why Timing Matters: Prompted vs Unprompted Disclosure

This is the single biggest factor in how much you’ll ultimately pay. Under HMRC’s penalty rules, an unprompted disclosure — one made before HMRC has any reason to believe it’s about to find the error — attracts a far lower penalty than a prompted disclosure made after contact from HMRC. For a careless error, an unprompted disclosure can start at 0%, while a prompted one is very rarely below 15%. Once HMRC has sent you a nudge letter or opened an enquiry, that lower band is gone for good, no matter how cooperative you are afterwards.

Which Route Applies to You?

In practice, most landlords who haven’t yet heard from HMRC are free to use the LPC on an unprompted basis. If you’ve already received a nudge letter, you can generally still use the LPC, but your disclosure will be treated as prompted, meaning a higher minimum penalty. If HMRC has gone further and opened a formal enquiry — or suspects deliberate concealment — the LPC route is usually closed to you, and you’ll be dealing with a standard compliance check or, in serious cases, COP9.

Working out exactly how many years of rental income need to be disclosed also depends on which category your behaviour falls into — careless errors generally require fewer years back than deliberate non-disclosure.

What Happens If You Do Nothing?

Doing nothing is the one option that reliably makes things worse. HMRC’s Connect system cross-references data from letting agents, banks, mortgage applications and property platforms, so undeclared rental income is increasingly likely to surface on its own. If it does, you lose the ability to make an unprompted disclosure entirely, and any subsequent enquiry starts from a position where HMRC is already suspicious.

Common Mistakes Landlords Make

  • Waiting to see if HMRC “actually finds out” rather than disclosing proactively
  • Assuming the LPC applies to a property held in a limited company (it doesn’t)
  • Submitting a partial disclosure and leaving out a property or income stream, which HMRC can treat as deliberate concealment if later discovered
  • Trying to negotiate a COP9 case without professional representation

How Felix Accountants Can Help

Whether you’re weighing up an unprompted LPC disclosure, responding to a nudge letter, or facing a formal enquiry, getting the behaviour classification right from the outset has a direct impact on your final bill. We handle the calculations, the correspondence with HMRC, and the disclosure itself, so you’re not navigating it alone.

Frequently Asked Questions

Can HMRC open an investigation while I’m in the middle of an LPC disclosure?

Generally, if your LPC disclosure is accurate, complete and submitted in good faith, HMRC treats it as a self-contained process and won’t open a parallel enquiry into the same rental income. However, HMRC does reserve the right to investigate further if the disclosure appears incomplete or inconsistent with information it already holds.

Does the Let Property Campaign apply to companies?

No. The LPC is only available to individual landlords with undeclared income from residential property. Landlords who hold property through a limited company need to correct their position through Corporation Tax filings instead.

What if I’ve already received a nudge letter?

You can usually still use the Let Property Campaign, but your disclosure will be classed as prompted, which generally means a higher minimum penalty than if you’d come forward first. It’s still typically far better than waiting for a formal enquiry to open.

Will using the Let Property Campaign guarantee I avoid prosecution?

The LPC does not offer a formal, legally guaranteed immunity from prosecution in the way that Code of Practice 9 does. In practice, criminal prosecution of landlords who make a full, honest disclosure is rare, because HMRC’s primary objective is recovering the tax owed rather than pursuing individuals through the courts.

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Let Property Campaign Voluntary Disclosure: Why Coming Forward Now Costs You Less

HMRC is not standing still on undeclared rental income. The Spring Budget committed an extra £100 million to fund 500 new compliance officers, alongside £79 million earmarked for third-party debt collection over the next five years — on top of the 1,800 debt management roles already announced in the previous Autumn Budget. In plain terms: HMRC’s ability to find undeclared rental income is growing fast, and landlords who wait are taking on more risk with every month that passes.

The good news is that landlords who come forward under the Let Property Campaign before HMRC contacts them can pay meaningfully lower penalties and sidestep a full-blown investigation. This article breaks down exactly how much that difference is worth in practice, using real calculation examples, and what to do if you can’t pay everything you owe at once.

Not sure what your voluntary disclosure would actually cost? Book a free discovery call and we’ll walk through your numbers with you.

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Why Timing Changes the Penalty You Pay

The single biggest lever landlords have over their own penalty bill is when they come forward. Disclose voluntarily, ahead of any HMRC enquiry, and the penalty bands sit meaningfully lower than if HMRC opens a compliance check first. Once HMRC initiates that enquiry, the more favourable rates disappear.

This applies whether your rental income was never reported to HMRC at all, or whether you filed a return but left the property income off it — HMRC treats these as two separate situations, each with its own behaviour categories.

How HMRC Classifies Your Behaviour

Where a landlord never registered for tax and never filed a return covering the rental income, HMRC groups the reason into one of three bands:

  • Non-deliberate — the omission stemmed from a genuine misunderstanding or circumstance, not an intent to avoid tax.
  • Deliberate (not concealed) — the landlord knew the income should have been reported and chose not to, but took no further steps to hide it.
  • Deliberate and concealed — the landlord not only withheld the income but actively worked to disguise it.

Where a return was filed but the rental income was left out or understated, a slightly different set of categories applies:

  • Reasonable care — HMRC doesn’t set a fixed test here; it’s judged case by case, but landlords are generally expected to seek advice when they’re unsure of the rules and to file accurate figures.
  • Careless — the return was wrong because reasonable steps weren’t taken to get it right, such as poor recordkeeping or overlooking a known obligation.
  • Deliberate — the landlord knew the figures were wrong and submitted the return anyway, for example by understating rental income or overstating costs.
  • Deliberate and concealed — the landlord not only filed an inaccurate return but took active steps to cover it up, such as producing a fabricated invoice for repair work that never happened.

What Actually Reduces Your Penalty

Beyond the behaviour category, HMRC also looks at the quality of the disclosure itself when setting the final penalty. A strong disclosure is scored across three elements:

  • Telling HMRC about the problem — worth up to 30% of the reduction
  • Helping HMRC understand what happened — worth up to 40%
  • Giving HMRC access to the records behind it — worth up to 30%

The more complete and cooperative the disclosure, the more the penalty can be reduced from the maximum. For landlords weighing up their overall position, our tax-saving strategies guide covers the legitimate ways to manage the ongoing liability once everything is up to date.

Case Study: Failure to Notify (Ben’s Eight Properties)

Ben has owned eight rental properties generating income since the 2016/17 tax year, and never filed a tax return covering any of it. His annual rental income sat around £45,000, with net profits — after deductions and mortgage interest — starting near £33,000 and rising year on year. His PAYE employment income began at £80,000 and grew by roughly 3% annually.

Once the calculation runs through to 2022/23, Ben’s total unpaid tax comes to £113,969. Assuming his behaviour is classed as non-deliberate and he cooperates fully, working through the applicable penalty rates:

  • Voluntary disclosure (before HMRC contacts him): total cost of £155,710
  • Prompted disclosure (after HMRC contacts him): total cost of £167,107

That’s a difference of £11,397 — purely down to coming forward first.

There’s a further wrinkle: HMRC generally won’t accept the most recent tax year as part of a Let Property Campaign disclosure. So a landlord disclosing for 2023/24, for example, would typically be asked to file that year’s return separately, which then carries its own late filing and late payment penalties.

If that 2023/24 return were filed six months late, the numbers would look like this:

Late filing penalties:

  • Initial penalty: £100
  • Daily penalties (up to 90 days): £900
  • Six-month penalty (the greater of £300 or 5% of unpaid tax): £999.30

Total late filing penalties: £1,990.30

Late payment:

  • 5% surcharge on unpaid tax: £999.30
  • Interest on the late payment: £771

Total estimated penalties for 2023/24 alone: £4,759.90

Landlords in Ben’s position want to know their exact exposure before they disclose, not after — this is exactly the kind of number our specialists work through on a discovery call.

Case Study: Inaccurate Returns (Ms Kim’s Rental Income)

Ms Kim runs a consultancy business that returned trading profits of £130,000 in 2018/19, growing at around 5% a year since. Alongside that, she owns two rental properties, cash-purchased with no mortgage, which brought in £28,000 gross in 2018/19 — £21,000 after £7,000 of allowable expenses. That rental income was never included on her Self Assessment return, and stayed missing from every year since, with income and costs both rising roughly 7% annually.

By 2022/23, her total unpaid tax comes to £59,409.

Her 2023/24 position is different, because a return for that year has already been filed. Since it’s within the amendment window (open until 31 January 2026), she can correct it directly without incurring additional late-filing penalties — though because the original payment deadline was 31 January 2025, late payment penalties and interest still apply.

Working through the penalty rates for the earlier years:

  • Voluntary disclosure: total cost of £85,443
  • Prompted disclosure: total cost of £94,354

A difference of £8,911 simply for disclosing before HMRC gets there first.

For 2023/24 specifically, if paid promptly:

  • Late payment penalty (5% of £12,614): £631
  • Interest on late payment: £355

Total tax, interest and penalty for 2023/24: £13,600

What If You Can’t Pay Everything Up Front?

HMRC expects payment in full at the point of disclosure — but that’s not always realistic, and it’s not a reason to delay. If you can’t cover the whole amount, the correct move is to contact HMRC’s Let Property Campaign helpline before you submit your disclosure or make any payment.

HMRC will want to understand your financial position to agree a realistic payment plan. Be ready to provide:

  • Your disclosure reference number
  • How and when you plan to pay what’s owed
  • Your current income and outgoings, weekly or monthly
  • What you own — property, vehicles, savings, investments
  • What you owe — mortgages, loans, credit cards

Submitting a disclosure (or payment) before this conversation has happened, when you genuinely can’t pay in full, can create more problems than it solves.

The Bottom Line

HMRC’s enforcement capacity is only growing, and every month of delay adds interest, risk, and — if HMRC gets there first — significantly higher penalties. Whether the gap in your case was an honest oversight or something more deliberate, the Let Property Campaign rewards landlords who come forward on their own terms rather than waiting to be found.

Ready to find out what your voluntary disclosure would actually cost?

👉 Book a free discovery call

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Let Property Campaign 2026: The Complete Guide for Landlords & Property Owners

If you’ve earned rental income from a UK residential property and it hasn’t been fully declared to HMRC, you’re not alone — and there’s a structured, HMRC-endorsed way to fix it before it becomes a bigger problem. The Let Property Campaign (LPC) is HMRC’s voluntary disclosure route specifically for landlords, and coming forward through it is almost always cheaper and less stressful than waiting to be found.

With HMRC’s data-matching capability now cross-referencing letting agents, land registries, tenancy deposit schemes, and bank records, the odds of an undisclosed letting going unnoticed are shrinking every year. This guide covers who the campaign is for, what income it covers, the disclosure process step by step, real penalty figures, and the mistakes that most often cost landlords money.

Not sure if the Let Property Campaign applies to your situation? Get a free discovery call with our team and we’ll talk through your exact position.

👉 Book your free discovery call

What the Let Property Campaign Actually Is

Launched by HMRC in September 2013, the Let Property Campaign gives individual landlords a route to voluntarily correct undeclared or under-declared UK rental income. Landlords who use it before HMRC opens an enquiry can benefit from:

  • Meaningfully reduced penalties
  • Protection from criminal prosecution in genuine, cooperative cases
  • A more efficient, less adversarial resolution than a full compliance check

Why HMRC Runs This Campaign

HMRC’s rationale is straightforward: property income is unusually easy to detect. Letting agent records, land registry filings, council tax data, tenancy deposit scheme registrations, and even bank deposit patterns can all flag an undisclosed letting without the landlord ever coming forward. Add in AI-driven data-matching campaigns targeting Airbnb hosts, agent-managed lettings, and council-tax-registered non-payers, and the picture is clear: HMRC increasingly finds these cases on its own. The campaign exists to reward the landlords who get there first.

The numbers back this up. Over 40,000 disclosures have now been made through the campaign, recovering more than £180 million in previously unpaid tax.

What Income Is Covered Under the LPC

The campaign covers a broad range of residential letting situations, not just traditional buy-to-let. You should be looking at the LPC if any of the following apply to you:

Letting out residential property — a single flat or a full portfolio, whether it came about deliberately or by accident (inheritance, relocation for work), located in the UK or abroad, as long as the income is subject to UK tax.

Short-term and holiday lets — Airbnb income, serviced accommodation, furnished holiday lettings, and any seasonal or short-term letting income.

Rent-a-room and subletting — income from letting a room in your own home once you exceed the £7,500 rent-a-room threshold, or subletting arrangements not already reflected on your return.

Inherited or temporarily let property — a property you’ve inherited and started renting, or letting your own home during a period abroad or a temporary absence.

Previously missed or under reported periods — years where the property was let but the income wasn’t declared, even briefly, or where a return was filed with errors.

Overseas and international lettings — UK residents with rental income from property abroad, and non-UK residents with rental income from UK property.

Who Should Use the LPC

The campaign is designed for landlords who:

  • Have rental income that’s never been declared to HMRC
  • Made errors on previous returns — under reported income, over-claimed expenses
  • Didn’t realise rental income needed reporting at all, regardless of whether it generated a profit

One point catches a lot of landlords out: even if allowable expenses wipe out your taxable profit entirely, you’re still legally required to report the income and expenses. Making no profit is not the same as having nothing to declare.

Common real-world scenarios

  • Inheriting a parent’s home and renting it out without telling HMRC
  • Becoming a landlord while working abroad, letting your UK home without realising it still needs reporting
  • Renting a spare room informally, assuming the amount is too small to matter
  • Moving in with a partner and letting your previous home without updating HMRC
  • Assuming a letting agent was handling the tax reporting (HMRC holds the landlord personally responsible, not the agent)
  • Misapplying mortgage interest relief rules, particularly following the 2020 change to a 20% tax credit
  • Jointly owned property where reporting responsibilities weren’t clearly split between owners

Who’s Eligible — and Who Isn’t

You’re eligible if you’re:

  • An individual (not a company, trust, or partnership)
  • Earning income from UK residential letting — including buy-to-let, Airbnb, accidental landlord situations, and non-resident landlords with UK property
  • Willing to disclose fully and voluntarily, before HMRC has opened an enquiry — meaning a complete declaration of all under-reported income, full transparency on years and documentation, and a genuine willingness to resolve what’s owed

You’re excluded if:

  • HMRC has already opened a compliance check or raised questions about your rental income — in this case you must respond directly to that enquiry instead
  • Your income comes from non-residential property (offices, shops, industrial units) — the LPC covers residential letting only
  • You’re a company, trust, or partnership, which need to use a different HMRC disclosure route

Worth noting: if you hold a mixed portfolio, only the residential portion qualifies for LPC — commercial property needs separate arrangements. Joint owners each need to make their own individual disclosure for their share of the income, and non-UK residents with UK rental income remain eligible if they meet the other criteria.

The Disclosure Process, Step by Step

1. Register your intent with HMRC Access the LPC service on GOV.UK and submit your details, including your National Insurance number, through the Digital Disclosure Service (DDS). HMRC issues a Disclosure Reference Number (DRN) and Payment Reference Number (PRN) — keep both, as they’re needed throughout.

2. Gather your information Pull together rental income figures for every relevant year, including years spent abroad or where the property stood empty part-time. Supporting documents matter here — tenancy agreements, mortgage interest records, utility bills, maintenance invoices, council tax records, and bank statements.

3. Calculate what’s owed Work out gross rental income, allowable expenses, and any capital allowances. HMRC’s online calculators can help, though complex cases usually benefit from a tax advisor. Don’t forget interest on the late tax — and be aware that penalties will be set according to your behaviour category (careless, deliberate, or concealed).

4. Submit your disclosure Complete the full disclosure through the DDS portal, explaining clearly why the errors or omissions occurred and what you’ve done to correct them. You have 90 days from receiving your DRN to submit.

5. Pay what’s due Once you’ve registered your intent, you’ll receive a payment reference to settle the total tax, interest, and penalty — either in full or through an agreed payment arrangement discussed directly with HMRC beforehand.

6. Confirmation and closure HMRC reviews the disclosure; honest, thorough submissions tend to close fastest. If further information is needed, respond promptly. Once accepted, HMRC issues a closing letter confirming the total amount payable, the period covered, any payment arrangement, and that the case is closed provided the terms are met.

Staying Compliant After Your Disclosure

Closing an LPC case isn’t the end of the story. Going forward, you’ll need to:

  • Declare all rental income and expenses on your annual Self Assessment return, regardless of profit or loss
  • Keep organised records for at least six years — receipts, agreements, correspondence — in case HMRC requests them later
  • File and pay by the 31 January deadline each year to avoid fresh penalties and interest
  • Stay current with HMRC guidance, since rules on allowable expenses and digital filing do change — HMRC’s Property Rental Toolkit is a useful reference
  • Revisit your position with a tax advisor whenever circumstances shift — new properties, overseas lettings, changes in tax residency

Our tax-saving strategies guide is a good next step once you’re back in good standing, for legitimate ways to manage the ongoing liability.

Real Disclosure Examples

The accidental landlord. Emma inherited her mother’s flat and let it out from 2018 without informing HMRC. Realising the gap in 2025, she disclosed £6,000 of undeclared rent through the LPC and, because she came forward voluntarily, paid only a 10% penalty with no further action.

The overseas landlord. Ajay relocated to Spain for work and let out his former UK home, unaware of his ongoing UK tax obligations as a non-resident. After receiving a nudge letter from HMRC, he used the LPC — working with a tax advisor to declare five years of rental profit — and secured a low penalty rate.

The inherited property. James inherited a house in 2017, let it out, and only recognised the reporting requirement in 2025. He used the LPC to settle seven years of unpaid tax plus interest, with a 15% penalty.

For a deeper look at how the maths plays out with real figures, our article on Let Property Campaign voluntary disclosure walks through two full case studies comparing voluntary versus prompted disclosure costs.

How Long Does a Disclosure Take?

Most LPC disclosures run 12–16 weeks from initial registration to final resolution, covering preparation, submission, and any follow-up queries or payment arrangements. Complex cases or gaps in documentation can extend this considerably.

Are LPC Cases Increasing?

Yes. In 2023, HMRC flagged over 18,000 property-related cases for compliance review — a figure expected to keep climbing as digital data-matching against letting agent returns, land records, and banking data becomes more sophisticated. The wider the net gets, the more voluntary, proactive disclosure makes financial sense.

How Penalties Are Actually Calculated

Penalties depend on several factors working together: the nature of the error (careless, deliberate, or deliberate and concealed), whether the disclosure was unprompted or prompted by HMRC contact, how long the omission persisted, and the quality of your cooperation.

There are two broad scenarios that trigger penalties — failure to notify HMRC of taxable income at all, and inaccurate returns where income was filed but understated. Both are calculated as a percentage of the additional tax owed (the “Potential Lost Revenue”), and a high-quality disclosure can cut that percentage by up to 90% within its range.

Voluntary, honest disclosure typically sits in the 0–20% penalty range — the lowest available — provided you’re fully cooperative, prompt, and transparent.

Prompted disclosure, where HMRC contacts you first, loses access to that leniency: rates run higher, sometimes double the voluntary range, even with full cooperation afterwards.

Deliberate or concealed behaviour carries the steepest penalties, typically 35–100% of the tax owed, and in the most serious cases can lead to criminal prosecution.

Reasonable care cases — genuine mistakes made despite taking sensible steps to get things right — can, in some circumstances, see the penalty waived entirely.

Key Takeaways

  • Voluntary disclosure before HMRC makes contact consistently produces the lowest penalty range, typically 0–20% of the tax owed
  • The quality of your disclosure — being open, prompt, and thorough — drives further reductions within that range
  • Genuine mistakes made with reasonable care can sometimes avoid a penalty altogether
  • Deliberate concealment carries the harshest consequences, both financially and legally
  • Professional guidance consistently improves outcomes — accurate figures, complete documentation, and a well-presented case all reduce the eventual penalty

Common Mistakes to Avoid

Only declaring recent years. HMRC can require disclosure going back up to 20 years for deliberate or concealed errors — review every year with missing or inaccurate figures, not just the obvious ones.

Misclassifying allowable expenses. Since April 2020, mortgage interest relief works as a 20% tax credit rather than a straight deduction — a common source of error.

Leaving out overseas property. Worldwide rental income is re-portable if you’re UK tax resident, not just UK-based lettings.

Doing the calculations yourself. Self-calculated figures frequently miss reliefs or misstate the tax owed — a second set of eyes from a qualified accountant catches this before HMRC does.

Missing the 90-day window. Once you’ve registered, the clock is running — late submission can forfeit the penalty reductions you’d otherwise qualify for.

Assuming the letting agent handles it. The legal responsibility for reporting sits with the landlord, regardless of what an agent manages day to day.

Assuming no profit means nothing to declare. All rental income needs reporting even where allowable expenses bring the taxable profit to zero.

Waiting to be contacted. A disclosure made after a nudge letter is a prompted disclosure — and loses the best penalty terms by definition.

Incomplete documentation. Missing tenancy agreements or bank statements can stall a disclosure or undermine its credibility — keep thorough records for every property and year involved.

When to Bring In Professional Help

Certain situations tend to benefit most from specialist advice:

  • More than four years of undeclared income, where the calculations and documentation requirements get more complex
  • Multiple properties or overseas lettings, which can introduce double taxation questions and varying expense rules
  • Complicated expense positions — joint ownership, furnished holiday lettings, or major repair and improvement claims

As one chartered tax advisor puts it, the Let Property Campaign is a genuine opportunity to regularise your affairs on favourable terms — provided the disclosure is accurate and the communication with HMRC stays open throughout.

Frequently Asked Questions

Do I need to use the LPC if I’ve already reported my rental income? No — the campaign is specifically for correcting income that wasn’t declared, or was declared incorrectly. If your returns are already accurate, there’s nothing to disclose.

Who can use the LPC? Individual landlords — not companies, trusts, or partnerships — with undeclared or under-declared UK residential rental income, whether they’re UK resident or overseas.

What happens if HMRC contacts me first? You move from a voluntary to a prompted disclosure, which carries higher penalty rates and less flexibility, though cooperation still helps.

What if I can’t afford to pay what’s owed right now? Contact HMRC’s LPC helpline before submitting your disclosure or any payment — they can discuss a realistic payment arrangement based on your financial position.

What expenses can I claim against my rental income? Allowable expenses generally include letting agent fees, repairs and maintenance, insurance, and a mortgage interest tax credit (since the 2020 rule change) — a tax advisor can confirm what applies to your specific setup.

How many years do I need to disclose? It depends on why the income wasn’t declared — careless errors typically mean up to six years, deliberate or concealed behaviour can extend that to twenty. Our guide on which years to declare breaks this down in detail.

Will I be prosecuted? Prosecution is reserved for the most serious, deliberate, and concealed cases. Honest, cooperative voluntary disclosures are very rarely treated this way.

Quick Reference Tips

  • Joint landlords each need to submit their own individual disclosure
  • Overseas landlords should check whether double taxation arrangements apply to their situation
  • Keep documentation for at least six years after your disclosure is closed
  • If older records genuinely don’t exist, explain this within the disclosure — HMRC will generally work from a reasonable best estimate
  • Get advice from a specialist tax advisor if your case involves overseas property, joint ownership, or inheritance complexities

Final Thoughts

The Let Property Campaign remains one of the most practical routes HMRC offers landlords to put things right. With data-matching only getting sharper, waiting to be contacted is the more expensive option in almost every case. Whether your situation started as an honest oversight, a life event like an inheritance, or something more complicated, coming forward on your own terms keeps you in control of the outcome.

Ready to work out exactly where you stand?

👉 Book a free discovery call

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Reporting Undisclosed Rental Income to HMRC: What Landlords Need to Know

If HMRC has never heard about some or all of your rental income, the Let Property Campaign is the mechanism built specifically to fix that. It gives residential landlords a formal way to bring past tax years up to date — and, more often than not, it’s simply a question of when you report it rather than whether HMRC eventually finds out on its own.

This guide covers how HMRC actually identifies undisclosed rental income, who the campaign is open to, the exact steps involved in making a disclosure, and what happens if HMRC pushes back on your figures.

Received a letter from HMRC, or just want to check your position before they get in touch? Book a free discovery call and we’ll talk it through.

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How HMRC Actually Finds Undisclosed Rental Income

It’s tempting to assume small or informal lettings fly under the radar. In practice, HMRC pulls from a wide net of sources: letting agent records, land registry filings, council tax data, mortgage applications, and even reports from members of the public. Where the data points to rental income that hasn’t been matched against a tax return, HMRC will often reach out directly, inviting the landlord to use the Let Property Campaign to put things right.

The key detail here is timing. You don’t have to wait for that letter. Landlords who register for the campaign proactively — before any contact from HMRC — are treated more favourably, with faster resolution and materially lower penalties than those who only respond once HMRC has already made contact.

Who the Campaign Is Open To

The Let Property Campaign covers a broad range of residential landlords, including:

  • Landlords with one or more residential properties, whether in the UK or overseas
  • Individuals renting out a room in their own home under the Rent a Room Scheme
  • Landlords letting to students, workforce tenants, or similar groups
  • Holiday let landlords

Who Can’t Use It

A few situations fall outside the scope of the campaign:

  • Commercial property — shops, garages, and lock-ups aren’t covered on their own, though a mixed portfolio with a residential component can still use the campaign for that portion
  • Companies and trusts — these need to use a different disclosure route entirely; the campaign is for individuals
  • Directors and commercial landlords — separate disclosure methods apply here too

Joint ownership is treated individually, not jointly. Where a property is owned by more than one person, each owner needs to make their own separate disclosure covering their share of the profit — a single combined submission isn’t accepted.

The Disclosure Process

1. Notify HMRC of your intent If HMRC hasn’t already been in touch, you register your intention to disclose and receive a reference number in return.

2. Quantify the undisclosed income Within 90 days of getting that reference number, work out all previously undisclosed income and gains across every year HMRC can still assess — and this isn’t limited to rental income alone; any other undisclosed business or investment income within scope should be included too.

3. Calculate what’s owed Work through the additional tax, interest, and penalties due for each affected tax year.

4. Make a formal offer Submit a formal offer to HMRC to settle everything in full and final settlement of your historical position.

5. Pay using your reference number Once the offer is submitted, use your Payment Reference Number to settle the agreed amount.

6. Submit full supporting detail Alongside your calculations and offer, provide a comprehensive account of the facts and assumptions behind your figures.

What happens after submission: HMRC typically sends an acknowledgement within around two weeks, followed by internal checks. If they’re satisfied, you’ll receive a formal acceptance letter closing the matter. If not, expect follow-up questions aimed at verifying your figures.

Going forward, staying compliant means registering for Self Assessment if you haven’t already, and reporting all income and gains through your annual return from that point on.

There’s real value in professional input at this stage — not just to get the numbers right, but because there are legitimate technical arguments that can reduce both the number of years included and the resulting penalty. For a closer look at how everyday situations turn into undisclosed income in the first place, our article on common landlord tax errors is worth reading alongside this one.

How Many Years Get Included

The number of assessable years isn’t fixed — it depends on the nature of the underlying issue, and our guide on which years you need to declare covers this in full detail.

One point worth flagging clearly: if income or gains were deliberately left off a return, there’s a genuine risk of prosecution, and professional advice on your options is strongly recommended before proceeding. In cases involving deliberate conduct, the Contractual Disclosure Facility is a separate route that can offer immunity from prosecution — a very different mechanism from the Let Property Campaign, and one worth discussing with an advisor if it’s relevant to your circumstances.

What If Your Records Are Incomplete?

Missing historical records don’t remove the obligation to disclose. The expectation is a genuine effort to obtain what documentation still exists, and where gaps remain, reasonable, well-explained assumptions can be used to quantify the income and gains involved.

How the Tax Is Actually Calculated

Tax on previously undeclared profit is worked out using the rates and allowances that applied in each specific tax year in question — not current-year rates applied retrospectively. How much falls due depends on how far income sat above the tax-free personal allowance for that year, and it’s worth making sure every available relief is claimed rather than assumed away.

How the Penalty Is Set

Penalty rates vary by circumstance, but voluntary, high-quality disclosures consistently land at the lower end of the scale. The starting point also differs depending on whether returns were filed incorrectly versus never filed at all.

HMRC reduces penalties based on how the disclosure is handled — often summarised as telling, helping, and giving: coming forward with the issue, actively assisting HMRC in understanding it, and cooperating fully in establishing the correct figures. Landlords weighing up the practical cost difference between disclosing voluntarily and waiting to be contacted may find our voluntary disclosure guide useful, since it walks through real penalty comparisons with worked figures.

If HMRC Disagrees With Your Disclosure

HMRC retains the right to review any disclosure for accuracy and can challenge the assumptions behind it, including requesting the underlying records used to support the figures submitted.

Where a disagreement over the final amount can’t be resolved, HMRC may issue formal assessments for the tax and penalties it believes are due. From there, you retain the right to appeal. If an appeal doesn’t resolve things, further options remain available — including requesting an internal review or taking the matter to the Tax Tribunal for a final decision.

Getting It Right From the Start

A well-prepared disclosure, backed by accurate figures and a clear explanation of the facts, is far more likely to close quickly and without dispute. Given the technical judgement involved in scoping the right years and minimising penalties, most landlords benefit from working through this with an experienced advisor rather than navigating it alone. For the full picture on eligibility and process, our complete Let Property Campaign guide brings everything together in one place.

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