BADR Tax Advice for Company Sales as HMRC Scrutiny Rises

Founders planning to sell their businesses increasingly need BADR tax advice for company sales as HMRC expands its review of how proceeds are structured and taxed. Particular attention is falling on arrangements where payments to founders may reflect ongoing work rather than the value of shares sold. 

The shift is not limited to obvious avoidance. Tax advisers are reporting that commercially driven transactions are now subject to greater documentation requests, especially where payments are tied to a founder’s post-sale involvement.

Why BADR tax advice for company sales matters now 

The context is straightforward. Business Asset Disposal Relief (BADR), which replaced Entrepreneurs’ Relief in 2020, offers a reduced Capital Gains Tax (CGT) rate on qualifying business disposals. The rate has risen sharply recently.

Under current rules confirmed by GOV.UK:

• BADR applied at 10% until 5 April 2025
• It rose to 14% from 6 April 2025
• It rose again to 18% from 6 April 2026
• The relief is capped at a lifetime limit of £1 million in qualifying gains

Without BADR, gains on share disposals are taxed at 18% for basic-rate taxpayers and 24% for higher-rate taxpayers. The relief remains valuable. However, HMRC is increasingly scrutinising whether what founders call sale proceeds are, in substance, payments for future services.

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What Triggers an HMRC Challenge

The classification of payments in a business sale matters significantly. There are two very different tax outcomes depending on how a payment is treated:

Payment Type	Tax Treatment	Rate (2026/27)
Capital proceeds (sale of shares)	Capital Gains Tax, eligible for BADR	18% on qualifying gains up to £1m
Income / remuneration	Income Tax and National Insurance	Up to 45% income tax plus NICs

HMRC’s concern is that some payments labelled as capital proceeds are, in substance, earnings. Three structures are drawing the most attention.

Earn-out arrangements:

An earn-out allows a seller to receive additional payments after completion if the business hits agreed targets. These are commercially common, particularly where buyer and seller disagree on valuation. However, where earn-out payments depend heavily on the founder remaining employed and meeting personal performance criteria, HMRC may classify them as remuneration rather than deferred sale proceeds. If that happens, income tax and NICs apply rather than CGT.

Consultancy and retention fees:

Buyers often want founders to stay post-completion. Payments for this period need careful structuring. If a retention fee is, in effect, disguised salary, it will be taxed as employment income regardless of what the sale agreement calls it.

Transactions in Securities rules:

HMRC’s internal guidance gives it powers under the Transactions in Securities rules to reclassify what appears to be a capital receipt as income, where it believes a main purpose of the transaction is obtaining an income tax advantage. These rules are not new, but advisers report they are being applied more broadly.

The One-to-Many Campaign: What Has Already Started

HMRC’s stepped-up activity is not just a future risk. A formal compliance campaign is already under way.

From December 2025, HMRC’s Wealthy Team began issuing one-to-many letters to taxpayers who claimed BADR in their 2024/25 self-assessment returns and may have exceeded the £1 million lifetime limit. ICAEW confirmed that recipients fell into two categories:

• Those who had already exhausted the lifetime limit before their 2024/25 claim
• Those whose 2024/25 claim pushed total lifetime gains above £1 million

The campaign has since extended to a second tranche of letters covering 2024/25 returns. Recipients are asked to amend their returns or contact HMRC to explain why their position is correct. Failure to respond may result in HMRC amending the return directly or opening a formal compliance check.

The lifetime limit complexity is real. The limit was reduced from £10 million to £1 million in March 2020. Founders who claimed substantial relief before that date may have inadvertently exhausted their allowance without realising it affects future claims.

Founder earn-out tax advice and the earn-out risk 

For founders negotiating deals now, the earn-out question deserves particular attention. The key test HMRC applies is whether the additional payment reflects the value of what was sold or whether it reflects what the founder will do after the sale.

Payments linked to post-completion service periods, personal retention, or individual performance targets are more likely to be treated as income. Payments genuinely tied to the underlying business performance, independent of the founder’s continued involvement, have stronger grounds for capital treatment.

The distinction is not always clean. Deal lawyers and tax advisers should be involved before heads of terms are agreed, not afterwards. HMRC may not accept an earn-out restructuring after the fact, and it is difficult to do.

Company sale tax planning for founders before completion 

Regardless of deal size, founders approaching a sale should take the following steps:

• Check lifetime BADR usage. Total claims across all previous disposals must remain within £1 million. This includes disposals made before March 2020.
• Audit the deal structure early. Earn-outs, retention fees, and consultancy arrangements all need to be reviewed before the terms are finalised.
• Document commercial rationale. HMRC is requesting more documentation. Evidence of how payments were valued and why structures were chosen is essential.
• Review BADR eligibility conditions. The founder must have held at least 5% of the company’s shares and votes for at least two years before disposal. Changes in share structure during a funding round can disrupt these conditions.
• Confirm trading company status. BADR only applies to genuine trading companies. Investment activity or non-trading income above a certain level can disqualify a company from the relief.
• Understand anti-forestalling rules. Unconditional contracts signed before a rate change date are generally protected. However, conditions remaining at the time of the rate change can invalidate this protection.

How Apex Accountants & Tax Advisors Can Help

Founders face a more demanding compliance environment than existed even two years ago. HMRC has more data, more campaign activity, and clearer powers to reclassify payments made in connection with a company sale.

Apex Accountants & Tax Advisors provides BADR tax advice for company sales to business owners, shareholders, and company directors considering exits, including: 

• Pre-sale BADR eligibility reviews, covering shareholding structure, employment status, and trading conditions
• Earn-out and deferred consideration analysis, to assess the risk of income reclassification before terms are signed
• Lifetime limit calculations for founders with multiple previous disposals
• Documentation support to evidence the commercial rationale behind deal structures
• Self Assessment compliance, including amending returns where an HMRC letter has been received
• Succession and exit planning, covering Management Buyouts, Employee Ownership Trusts, and third-party sales

Acting early is essential. Once you sign a deal, your restructuring options narrow significantly.

Contact Apex Accountants today to discuss your business exit position. Book a free consultation with one of our specialist tax advisers before you agree to heads of terms.

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Frequently Asked Questions

What is BADR and does it still apply to company sales?

 Business Asset Disposal Relief (BADR) reduces the CGT rate on qualifying business disposals. It currently applies at 18% (from 6 April 2026) to the first £1 million of qualifying lifetime gains. To qualify on a share sale, you must hold at least 5% of the company’s shares and voting rights. and have been an officer or employee of the company throughout a qualifying two-year period. Full details are available at GOV.UK: Business Asset Disposal Relief.

What is the BADR lifetime limit, and why does it matter?

 BADR is capped at a cumulative lifetime limit of £1 million in qualifying gains. This limit applies across all disposals in your lifetime, not per transaction. It was reduced from £10 million in March 2020. Founders who claimed substantial relief before that date may have less remaining allowance than they expect. Exceeding the limit means any surplus gains are taxed at the standard CGT rate of 24% for higher-rate taxpayers.

Can HMRC reclassify my earn-out payment as employment income? 

Yes. HMRC can challenge the tax treatment of earn-out payments if they appear to reflect remuneration for future services rather than the value of shares sold. Where payments are conditional on the founder remaining employed and meeting personal performance targets, there is a meaningful risk of reclassification as employment income. This would remove eligibility for BADR and trigger income tax and National Insurance instead. Structuring earn-outs correctly from the outset is essential.

What happens if I receive one of HMRC’s BADR compliance letters?

 HMRC is writing to taxpayers who may have exceeded the £1 million lifetime limit. If you receive a letter, you should review your cumulative lifetime BADR claims across all previous disposals. Should you exceed the limit, amending your Self Assessment return and paying any additional tax owed will be necessary. Interest will apply on late payment. If you believe your claim is correct, you should contact HMRC to explain your position rather than ignoring the letter.

Does founder earn-out tax advice matter for deferred consideration? 

 It can, but the timing and structure matter. BADR eligibility generally depends on whether the conditions are met at the time of disposal. Earn-outs that qualify as genuine deferred consideration, tied to the value of the business rather than to personal future performance, may be eligible. Those linked to continued employment or personal targets are more vulnerable to HMRC challenge.

When should company sale tax planning for founders begin? 

Tax planning for a business exit should begin well before formal sale discussions start, ideally at least two years in advance. This allows time to ensure BADR qualifying conditions are met, to review shareholding structures, and to consider whether deal features such as earn-outs or retention arrangements need to be structured differently. Leaving these matters to the due diligence stage significantly reduces the options available.