Selling Your Business? A Simple Guide to UK Capital Gains Tax in 2026

By Jessica

Selling a business is often the culmination of years of hard work, late nights, and significant personal sacrifice. Whether you are retiring, moving on to your next venture, or simply cashing out while the market is hot, the financial reward is well-deserved. However, before you start planning how to spend the proceeds, there is one major partner you need to settle with: HM Revenue & Customs (HMRC).

As of July 2026, the landscape for Capital Gains Tax (CGT) in the UK has shifted. If you are planning an exit this year, understanding how the current rates and reliefs apply to your sale is critical. In this guide, we will break down the tax implications of selling your business in 2026 in simple terms, so you can walk away with as much of your hard-earned money as possible.

What is Capital Gains Tax (CGT)?

At its core, Capital Gains Tax is the tax you pay on the "profit" (the gain) you make when you sell an asset that has increased in value. When you sell your business, the "gain" is generally the difference between what you sold it for and what it cost you to set up or buy originally. For a recent real-world example of how HMRC approaches these issues, see HMRC Wins £6.2m CGT Case: 3 Lessons for Small Business Owners.

For the 2026/27 tax year, the standard CGT rates are:

• 18% for basic-rate taxpayers.

• 24% for higher or additional-rate taxpayers.

While these rates are the baseline, most business owners selling a qualifying trading company will look to access a much more favourable rate through Business Asset Disposal Relief (BADR).

The "Golden Ticket": Business Asset Disposal Relief (BADR)

Formerly known as Entrepreneurs' Relief, BADR is the most significant tax break available to UK business owners. Its purpose is to encourage entrepreneurship by reducing the tax burden when you eventually sell your stake in a business.

The 2026 BADR Rate

It is important to note that the BADR rate has changed recently. While it sat at 10% for many years and rose to 14% in 2025, for disposals made on or after 6 April 2026, the BADR rate is now 18%.

While 18% is higher than it used to be, it still offers a significant saving compared to the 24% higher-rate CGT. If you are a higher-rate taxpayer selling a business for a significant gain, BADR effectively saves you 6p for every £1 of gain.

The £1 Million Lifetime Limit

There is a cap on how much of this relief you can use. You can only claim BADR on a total of £1 million of qualifying gains over your entire lifetime.

• Example: If you sell a business in 2026 and make a £1.5 million profit, the first £1 million (minus your annual allowance) will be taxed at 18%. The remaining £500,000 will be taxed at the standard CGT rate of 24% (assuming you are a higher-rate taxpayer).

Are You Eligible for the 18% Rate?

To qualify for BADR when selling your business in 2026, you generally need to meet several criteria for at least two years leading up to the date of the sale.

1. For Shareholdings (Limited Companies)

If you are selling shares in a company, you must:

• Hold at least 5% of the ordinary share capital.

• Hold at least 5% of the voting rights.

• Be entitled to at least 5% of the profits available for distribution and 5% of the assets on a winding up.

• Be an officer or employee of the company (or a company within the same group).

2. For Sole Traders and Partners

If you are selling the business itself (the assets and goodwill), you must have owned the business for at least two years.

Meeting these rules is not always straightforward, especially if your company has different share classes or if you have recently changed your role. This is why many SMEs compare accountant services early in the sale process to ensure their eligibility is watertight.

Structuring the Sale for Tax Efficiency

How you structure your exit can have a massive impact on your final tax bill. Here are three common strategies business owners use in 2026:

1. Utilising Your Annual Exempt Amount

Every individual has an annual CGT allowance. For the 2026/27 tax year, this is £3,000. While it might seem small compared to a multi-million-pound sale, every little bit helps. If you are selling the business with a spouse or partner who also owns a significant stake, you can both use your allowances and your respective £1m BADR limits.

2. Staggering the Sale

If your gain is likely to exceed the £1 million BADR limit, some owners look at staggering the sale over different tax years or using specific share structures. However, HMRC has strict "anti-avoidance" rules, so any such move must have a genuine commercial purpose and not just be a "tax dodge."

3. Dealing with "Earn-outs"

Sometimes, a buyer will pay you part of the purchase price upfront and the rest later, based on the business's future performance (an "earn-out"). The tax treatment of earn-outs can be complex: some are taxed as capital gains, while others might be treated as income. Getting the wording right in your sale agreement is vital to avoid a surprise tax bill later.

Common Pitfalls to Avoid

Even with the best intentions, it is easy to make a mistake that loses you your BADR eligibility.

• The "Trading" Requirement: To qualify for BADR, the company must be a "trading company." If your business holds too much in the way of non-trading assets (like large amounts of cash not required for the trade or significant investment properties), HMRC might argue it is no longer a trading company, disqualifying you from the 18% rate.

• Missing the Deadline: You must claim BADR by the first anniversary of the 31 January following the tax year in which the sale took place. For a sale in July 2026, you would have until 31 January 2029 to make the claim.

• Incomplete Records: HMRC is increasingly digital. Ensure your small business accounting records are up to date and that you have clear evidence of your shareholding and employment status for the full two-year qualifying period.

Why Professional Advice Matters in 2026

The rise in the BADR rate to 18% and the standard higher rate to 24% means there is less room for error than there used to be. A mistake in your tax filing or a failure to meet the "personal company" tests could cost you tens of thousands of pounds.

Planning your exit should start at least two years before you intend to sell. This gives you time to "clean up" the balance sheet, ensure you meet the 5% tests, and confirm that your company qualifies as a trading entity.

If you haven't yet secured a tax specialist for your exit, now is the time to find an accountant for your small business. You may also find our Accounting Services UK: The Complete Guide to Finding the Right Accountant for Your Business helpful when weighing up your options. A specialist tax accountant can help you model different sale scenarios, ensuring you understand exactly what will land in your bank account after the taxman takes his share.

Final Thoughts

Selling your business in 2026 is an exciting milestone. While the tax rules have become slightly more expensive with the 18% BADR rate, the UK remains a relatively tax-efficient place to exit a company compared to many other developed economies.

By understanding the £1 million lifetime limit, ensuring you meet the two-year ownership rules, and seeking professional advice early, you can navigate the 2026 tax landscape with confidence.

At Accountant Search, we help business owners like you connect with local experts who specialise in business sales and CGT planning. If you are not sure where to begin, our How to Find an Accountant in the UK: A Step-by-Step Guide for Business Owners can help you take the next step. Don't leave your exit to chance( get the right advice today.)

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