HMRC BADR lifetime limit letters explained: what they mean and what to do next
If HMRC has contacted you about a Business Asset Disposal Relief (BADR) claim, you may feel alarmed at first glance, and you are far from alone. HMRC is running a broader review focused on BADR, which some will remember as Entrepreneurs’ Relief.
These letters are not sent at random, and they are not an accusation. They are intended as a prompt to double-check whether a BADR claim included in a 2024 to 2025 Self Assessment return may have gone beyond the lifetime allowance. Taking a bit of time to understand what HMRC is asking and responding properly can help avoid unnecessary worry, interest charges and penalties.
This article explains why HMRC is writing to taxpayers about what the BADR lifetime limit is, how these letters work and what you should do next.
What is Business Asset Disposal Relief, and why does the lifetime limit matter
Business Asset Disposal Relief is a Capital Gains Tax (CGT) relief which lets individuals pay CGT at 10 per cent on qualifying business disposals. It typically applies when selling all or part of a business, shares in a personal trading company or assets used in a business.
The key point that catches many people out is the lifetime limit. BADR is not unlimited. There is a cap on the total amount of gains you can claim relief on over your lifetime.
Originally, the lifetime limit was £10 million. However, this changed on 11 March 2020 when the government reduced the limit to £1 million. All qualifying disposals made both before and after that date count towards the same lifetime total.
That means if you claimed BADR years ago under the old higher limit, those earlier claims still count when assessing whether you have now exceeded £1 million in total gains.
HMRC is now actively checking claims made in 2024 to 2025 against its records of earlier disposals.
Why HMRC is sending these BADR letters now
HMRC is writing to taxpayers who included a BADR claim in their 2024 to 2025 Self Assessment return and who, according to HMRC records, may have exceeded the £1 million lifetime limit.
There are two main scenarios HMRC is targeting:
- In one case, HMRC believes your most recent claim has taken you over the lifetime limit, meaning part of the relief claimed is excessive and needs to be reduced.
- In the other case, HMRC believes you had already used up the full £1 million limit before submitting your latest return, which would mean no BADR should have been claimed at all.
Both versions of the letter ask you to review your position and either amend your return or explain why you believe your claim is correct
This is part of HMRC’s one-to-many campaign approach, where they prompt taxpayers to correct issues voluntarily rather than opening a formal enquiry straight away.
What the HMRC letter is really asking you to do
Although the tone of the letter may feel formal, it is essentially a request to check your maths and your history.
HMRC is asking you to confirm how much BADR you have claimed over your lifetime, including claims made before March 2020. If the total exceeds £1 million, then your 2024 to 2025 claim needs adjusting.
If HMRC believes you are already over the limit, the letter will usually ask you to amend your return to remove the BADR claim entirely. If HMRC believes you have only exceeded the limit partway through the latest claim, the letter will ask you to reduce the claim to bring it within £1 million.
If you disagree with HMRC’s view, you are invited to contact them and explain why your claim is correct. This might apply if HMRC records are incomplete or if earlier disposals did not in fact qualify for BADR.
What happens if you ignore the letter
Ignoring it isn’t wise and rarely ends well. HMRC clearly sets out what usually follows next.
If you do not amend your return or contact HMRC by the deadline stated in the letter, HMRC may amend your return themselves or open a formal compliance check. If additional tax is found to be due, interest will be charged, and penalties may apply if the return is deemed inaccurate.
HMRC also makes it clear that penalties can be reduced if you engage in early disclosure fully and take steps to put things right. In short, cooperation matters.
Subscribe to the Affinity Associates blog
We’ll only use your email ID to send you blog updates.
See our privacy policy.
How to check whether you have exceeded the BADR lifetime limit
The first step is to gather a full history of your business disposals.
You need to identify every occasion where you claimed Entrepreneurs’ Relief or BADR, including those going back many years. For each disposal, you should confirm the amount of gains that qualified for the relief.
Add these together to calculate your total lifetime BADR claims. If the total is more than £1 million, then HMRC is likely to be correct and your latest return needs amending.
This is not always straightforward, especially where older records are involved or where multiple disposals took place around the time of the 2020 rule change. This is where professional advice can be particularly valuable.
What to do if HMRC is right
If your review confirms that you have exceeded the lifetime limit, you should amend your 2024 to 2025 Self Assessment return as soon as possible.
HMRC letters explain how to amend a return online via your Self Assessment account. Once amended, HMRC will calculate any additional Capital Gains Tax due, and interest will apply if payment is late.
Although paying more tax is never welcome, dealing with it promptly usually limits further consequences.
What to do if you think HMRC is wrong
If you believe your BADR claim is correct, do not simply ignore the letter. HMRC specifically asks you to explain your position and provide reasons.
This may involve demonstrating that earlier disposals did not qualify for BADR or that HMRC has incorrectly attributed a previous claim to you. Clear evidence and well-structured explanations make a difference.
In many cases involving historic transactions, professional representation can help present the facts clearly and reduce the risk of the matter escalating into a formal inquiry.
Why are these letters becoming more common
HMRC is increasingly using data-driven campaigns to identify potential errors in Self Assessment returns. BADR is a particular focus because it involves large tax savings and historic claims that span multiple years.
With the reduction of the lifetime limit in 2020, there is a higher risk of unintentional overclaims, especially for long-standing business owners who previously assumed the £10 million limit still applied.
These letters are designed to prompt correction rather than punishment, but only if taxpayers engage with them.
Final thoughts
Receiving an HMRC letter about Business Asset Disposal Relief can be unsettling, but it does not automatically mean you are in trouble. In most cases, it is a prompt to review past claims and make sure everything adds up.
The key is to act quickly to understand your lifetime BADR position and either amend your return or explain your reasoning clearly. If you’re unsure about your position or dealing with complex historic disposals, getting advice early can save time, money and stress.
Author
Mukund is a founding member of the Affinity Associates Group and has been with the practice for nearly 40 years. After completing his degree in Accounting and Finance, he went on to qualify with both ACCA and ICAEW in 1991. Over the years, he’s built deep expertise in consultancy, tax, business development, and corporate group structures. Mukund is known for helping clients make sense of complex financial challenges and turning them into opportunities for sustainable growth.
