Selling a business in 2026 involves more than agreeing a price with a buyer. What really matters is how much of that value you keep after tax.
Over the past few years, the UK tax landscape has shifted. Reliefs have tightened, allowances have reduced, and from April 2026, key rules such as Business Asset Disposal Relief (BADR) have become less generous. That means the gap between good planning and poor planning is now much wider, and in some cases can cost you a significant portion of your exit value.
The good news is that business sale tax becomes far more manageable once you understand the fundamentals. You do not need to become a tax specialist, but you do need a clear grasp of how the main taxes work, how deal structure affects them, and where the biggest risks sit.
In this updated 2026 guide, we will walk through the main taxes involved, how Capital Gains Tax works in practice, what is changing with BADR, and how to think about structuring your sale in a more tax-efficient way.
What taxes do you pay when selling a business in 2026?
The tax you pay when selling a business depends on a few core factors. The most important are your business structure, whether you are selling assets or shares, and the size of the gain you make.
In most owner-managed business sales, Capital Gains Tax is the main tax to focus on. However, that is not always the full picture. In some situations, particularly where a limited company is involved, Corporation Tax and even Dividend Tax can come into play depending on how proceeds are handled.
VAT and stamp duty can also apply in certain deal structures, although they are usually secondary considerations compared to CGT and Corporation Tax.
Capital Gains Tax when selling a business
Capital Gains Tax is charged on the profit you make from selling your business, not the total sale price. This distinction matters more than most people realise.
The gain is calculated by taking the sale proceeds and deducting what you originally paid, along with any allowable costs such as legal and advisory fees. What remains is the amount that is subject to tax.
For most business sales, the applicable rates are broadly 10% for basic-rate taxpayers and 20% for higher or additional-rate taxpayers, depending on your overall income position in that tax year.
This means that two business owners selling for the same price can end up paying very different amounts of tax depending on their wider financial situation.
Business Asset Disposal Relief (BADR) in 2026
Business Asset Disposal Relief remains one of the most important reliefs available to business owners, but it is becoming less generous from April 2026.
BADR allows qualifying individuals to pay a reduced rate of Capital Gains Tax on the sale of a business. Historically, this has been a major incentive for entrepreneurs, but the rate is expected to rise to 18% from April 2026, while the lifetime limit of £1 million in qualifying gains remains unchanged.
This shift does not make BADR irrelevant, but it does make timing more important. Business owners who are already considering an exit need to think carefully about whether completing before or after April 2026 materially affects their outcome.
In broad terms, BADR is designed for genuine owner-managers who have been actively involved in running a trading business over a sustained period. The detailed rules can be technical, but the key point is simple: eligibility needs to be planned for well in advance, not checked at the last minute.
Asset sale vs share sale: why structure matters
One of the biggest drivers of your tax position is whether the deal is structured as an asset sale or a share sale. The difference is both legal and financial.
In an asset sale, the buyer acquires specific parts of the business such as equipment, goodwill, and intellectual property. The company itself usually remains with the seller. In this situation, a sole trader will typically face Capital Gains Tax, while a limited company will pay Corporation Tax on any gains made within the company.
In a share sale, the buyer acquires the shares of the company itself. This means they take on the entire business, including its assets, liabilities, contracts, and history. For the seller, this usually results in a Capital Gains Tax charge on the disposal of shares, which is often more straightforward and potentially more tax-efficient.
In practice, buyers tend to prefer asset purchases because they can avoid historic risks, while sellers often prefer share sales because of the tax treatment. Most deals end up being a compromise between these positions.
How tax is calculated on a share sale
When you sell shares in your company, the tax calculation follows a relatively simple structure. You start with the amount paid by the buyer, deduct what you originally paid for the shares, and then subtract any allowable costs such as legal fees.
The resulting figure is your capital gain. From there, you apply any available reliefs such as BADR, and then the relevant Capital Gains Tax rate based on your income position.
Although the calculation itself is straightforward, the planning around it is where most of the value sits.
How to reduce tax when selling a business
You cannot make tax disappear entirely, but you can reduce it significantly with the right planning. The biggest mistake most owners make is leaving that planning too late.
The most effective approaches tend to centre around a small number of principles:
- Planning well in advance so that relief conditions are met before a sale is agreed
- Ensuring you qualify for BADR where possible
- Structuring ownership in a way that makes full use of available allowances
- Choosing the right deal structure between assets and shares
- Being deliberate about timing, especially around known tax changes such as those in April 2026
These are not aggressive tactics. They are simply about understanding the rules and using them properly.
Corporation Tax and business sales
If a limited company sells its assets rather than its shares, the company itself will pay Corporation Tax on any gains. This is an important distinction, because individuals do not pay Capital Gains Tax in this scenario, the company does.
The complication comes when you then want to extract the proceeds from the company. At that point, further tax can arise, often in the form of dividend tax. This is why asset sales can sometimes result in a higher overall tax burden compared to share sales.
Can you avoid Capital Gains Tax?
The idea of completely avoiding Capital Gains Tax is often misunderstood. In most cases, it cannot be eliminated altogether, but it can often be reduced or deferred depending on your situation.
There are a few routes that are commonly explored:
- Making full use of Business Asset Disposal Relief
- Deferring gains through schemes such as the Enterprise Investment Scheme
- Structuring a sale to an Employee Ownership Trust where appropriate
Each of these comes with its own conditions and trade-offs, so they need to be considered carefully rather than applied blindly.
The bottom line: selling a business tax-efficiently in 2026
Selling a business is one of the most significant financial events most owners will go through. Tax has a direct impact on the final outcome, and in 2026 that impact is becoming more pronounced.
With reliefs tightening and rates shifting, early planning is no longer optional. It is a core part of the exit process.
If there is one takeaway, it is this: start thinking about tax well before you begin negotiating a deal. Once terms are agreed, your options tend to narrow significantly.
Getting advice from a qualified accountant or tax adviser early on can make a substantial difference, not just to your tax bill, but to how smoothly the entire sale process runs.