Let Property Campaign: What is a Reasonable Excuse?

If you are a landlord who has fallen behind on your tax obligations, the Let Property Campaign offers a vital pathway to regularize your affairs. However, one of the most misunderstood aspects of making a disclosure is determining whether you have a Let Property Campaign reasonable excuse for your failure to notify HMRC of your rental income. Understanding this nuance is the difference between facing a 0% penalty and a substantial fine that eats into your property investment returns.

In this comprehensive guide, we will explore the specific scenarios HMRC deems acceptable, the legal thresholds for “reasonable care,” and how you can structure your disclosure to protect your reputation and your wallet.

Featured Snippet: What is a ‘Reasonable Excuse’ for HMRC?

A reasonable excuse for the Let Property Campaign is something that stopped you from meeting a tax obligation that you took reasonable care to meet. HMRC considers circumstances such as serious illness, bereavement, unexpected postal delays, or relying on professional advice that proved incorrect, provided you corrected the error as soon as the excuse ended.

The Significance of the ‘Reasonable Excuse’ in Your Disclosure

When you engage with the Let Property Campaign, you aren’t just handing over numbers; you are providing a narrative of your behavior. HMRC uses this behavior to determine the level of penalty you will pay.

If you can demonstrate a “reasonable excuse,” you may be able to avoid penalties entirely. Without one, HMRC may categorize your behavior as “careless” or even “deliberate,” which can lead to fines ranging from 15% to 100% of the tax due. For landlords in high-value areas like London or Windsor, these percentages translate into thousands of pounds.

What HMRC Typically Accepts as a Reasonable Excuse

HMRC does not provide an exhaustive list, as every landlord’s situation is unique. However, based on case law and HMRC’s own internal manuals, the following scenarios are frequently accepted as a Let Property Campaign reasonable excuse:

1. Bereavement and Serious Illness

If the death of a close relative or a life-threatening illness occurred shortly before your tax deadline, HMRC is generally sympathetic. The key is showing that the event caused a genuine disruption that made it impossible to manage your tax affairs.

2. Reliance on Professional Advice

If you appointed a professional—such as an accountant or a solicitor—and they provided you with incorrect advice regarding your rental income, this can count as a reasonable excuse. However, you must prove that you provided that professional with all the necessary facts and that it was reasonable for you to rely on their expertise.

3. Unexpected Hospital Stays

A sudden, prolonged stay in the hospital that prevented you from accessing your records or meeting filing deadlines is a classic example of an excuse “outside of your control.”

4. Technical Failures (HMRC or Postal)

If HMRC’s online systems were down for a prolonged period, or if there was a documented national postal strike or service failure that prevented documents from arriving, these are valid excuses.

Domestic or Personal Hardship

In extreme cases, such as escaping domestic abuse or facing homelessness, HMRC recognizes that tax compliance may not have been physically or mentally possible.

What Does NOT Count as a Reasonable Excuse?

It is equally important to know what HMRC will reject. Many landlords in Oxford or Reading find themselves in trouble because they rely on “myths” rather than tax law.

“I didn’t know I had to pay tax”: Ignorance of the law is rarely accepted as a reasonable excuse. As a landlord, you are expected to understand your basic legal obligations.
“My tenant didn’t pay me on time”: While this affects your cash flow, it does not exempt you from the requirement to report the income you did receive or notify HMRC of the rental business.
“The HMRC website is too complicated”: HMRC expects you to seek help (either from them or a professional) if you find the process difficult.
“I relied on my partner/spouse”: You are legally responsible for your own tax affairs. Unless your partner had a specific legal duty or there is a “reasonable excuse” for their failure that extends to you, this will likely be categorized as “careless.”

The ‘Reasonable Care’ Comparison: Excuse vs. Carelessness

Understanding where you fall on the spectrum of behavior is essential for your Let Property Campaign submission.

Behavior Level	Criteria	Typical Penalty (Unprompted)
Reasonable Excuse	An exceptional event stopped you from filing, despite your best efforts.	0%
Reasonable Care	You made a mistake, but you acted as a “prudent person” would.	0%
Careless	You failed to take enough care, but the omission wasn’t intentional.	0% – 30%
Deliberate	You knew you owed tax but chose not to declare it.	20% – 70%

How to Prove a Reasonable Excuse: A Step-by-Step Strategy

If you believe you have a valid excuse, you must present it clearly within your disclosure narrative. Here is the framework we use for our clients:

Step 1: Identify the Timeline

HMRC requires that the excuse existed at the time the tax obligation was missed. If your “excuse” happened three years after you started renting out a property in Slough without declaring it, it won’t apply to the earlier years.

Step 2: Show When the Excuse Ended

A reasonable excuse only lasts as long as the circumstance exists. If you were ill in 2022 but recovered in 2023, you must show that you took steps to fix your tax affairs “without unreasonable delay” once you were healthy again.

Step 3: Gather Evidence

HMRC will not take your word for it. You should provide:

Medical notes or hospital discharge papers.
Death certificates for bereavement claims.
Copies of incorrect advice received from previous professionals.
Correspondence with HMRC regarding technical issues.

Step 4: Draft the Disclosure Narrative

This is where professional help is invaluable. Your narrative should link the event directly to your failure to notify. Instead of saying “I was stressed,” say “Due to [Event], I was unable to access my financial records or fulfill my statutory duties under the Taxes Management Act 1970.”

The Role of a Specialist Accountant

Navigating the Let Property Campaign is complex. HMRC’s “Connect” database is now linked to the Land Registry and bank accounts, meaning they likely already know about your rental income in Reading or London.

A specialist accountant doesn’t just do the math; they act as your advocate. We help you determine if your situation meets the threshold for “reasonable care” or a “reasonable excuse,” ensuring you don’t overpay on penalties.

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Serving Landlords Across the South East

Our expertise in the Let Property Campaign is tailored to the specific needs of landlords in various regions:

Windsor: Managing high-value disclosures where penalty percentages can be exceptionally high.
Oxford: Assisting academic and professional landlords who may have inadvertently missed filings due to international work or complex portfolios.
London: Navigating the Non-Resident Landlord Scheme (NRLS) and multi-property disclosures.
Reading & Slough: Supporting local landlords who have received “nudge letters” and need to act quickly to secure “unprompted” status.

Overview Optimization: Quick Facts

Definition: A reasonable excuse is an exceptional circumstance that prevented you from fulfilling your tax duties despite taking reasonable care.
Common Examples: Serious illness, bereavement, professional advice errors, and technical failures.
Invalid Excuses: Lack of funds, ignorance of the law, or simple oversight.
Penalty Impact: Proving a reasonable excuse can reduce your penalty to 0%.
Action Needed: You must rectify the tax position as soon as the excuse ends to remain eligible for leniency.

FAQ: People Also Ask

1. Can “mental health issues” count as a reasonable excuse?

Yes. HMRC recognizes that serious mental health conditions can be just as debilitating as physical ones. However, you will usually need medical evidence showing that the condition specifically prevented you from managing your financial affairs.

2. What if I was living abroad and didn’t realize UK tax applied?

HMRC generally considers it the landlord’s responsibility to research the tax laws of the country where the property is located. This is rarely accepted as a “reasonable excuse,” but it may be categorized as “careless” rather than “deliberate,” which still helps lower the penalty.

3. How quickly do I need to disclose once the excuse ends?

HMRC uses the term “without unreasonable delay.” Generally, this means you should take action within 30 to 90 days of the excuse ceasing. Waiting a year after recovering from an illness to make a disclosure will likely invalidate the excuse.

4. Can I use a reasonable excuse if I received a nudge letter?

If you received a “nudge letter,” your disclosure is technically “prompted.” You can still claim a reasonable excuse for the original failure to notify, but the fact that HMRC found you first makes the argument harder to win.

5. Does being “too busy” count?

No. Being a busy professional in London or Windsor is never accepted as a reasonable excuse. HMRC expects you to delegate your tax affairs to a professional if you do not have the time to manage them yourself.

6. What if my accountant made the mistake?

If your accountant made a technical error despite you providing all the correct information, this is a very strong candidate for a reasonable excuse. You are essentially claiming you took “reasonable care” by hiring a professional.

7. Can “lack of money” be an excuse?

No. A lack of funds to pay the tax is not an excuse for failing to disclose the income. You should disclose the income and then negotiate a payment plan (Time to Pay) with HMRC.

To ensure you are fully informed about your obligations, we recommend reviewing these resources:

Don’t Leave Your Penalty to Chance

The Let Property Campaign is a fair system, but it is not a lenient one for those who are unprepared. Claiming a Let Property Campaign reasonable excuse requires more than just a good story; it requires evidence, a solid understanding of tax law, and a correctly structured disclosure.

If you are unsure whether your circumstances qualify, the worst thing you can do is wait. The interest on unpaid tax grows daily, and the risk of a “prompted” inquiry increases every time HMRC’s “Connect” system runs a data match.

By acting now and seeking professional representation, you can ensure that your behavior is categorized fairly, your penalties are minimized, and your property business can move forward with a clean slate.

Protect your reputation and your investment today.

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