Navigating Taxes When Selling Your Business: Capital Gains & Corporation Tax Explained

Selling your business is one of the most significant decisions you’ll ever make as a business owner. Whether you’re dreaming of retirement, looking for a new challenge, or deciding to cash in on all your hard work, it’s an exciting milestone. But before you pop the champagne, it’s crucial to consider what comes next – specifically, how selling your business and taxes go hand in hand.

In the UK, selling a business isn’t just about striking a deal with a buyer and handing over the keys. There are important tax implications that can seriously impact how much you walk away with. Depending on your business structure (whether you're a sole trader, part of a partnership, or running a limited company), you could face Capital Gains Tax, Corporation Tax, or both – and how you approach the sale (such as an asset sale) matters, too.

Don’t stress – with the right planning and advice, you can avoid unexpected tax bills and ensure your business exit is as smooth and profitable as possible. In this guide, we’ll break down the key taxes involved in selling a UK business, explain how different structures affect your tax bill, and provide some practical steps for getting your tax affairs right from day one.

Why Are Taxes So Important When Selling a Business?

It’s easy to get lost in negotiation details, buyer requirements, and the handover process. But the reality is, taxes can eat into your profits more than you might expect if you haven’t planned ahead.

• The tax you’ll pay can differ dramatically depending on how your business is set up – and how the sale is structured.
• Getting it wrong (or leaving it too late) could mean facing a larger-than-expected bill, HMRC scrutiny, or even penalties.
• Early planning gives you more options to minimise tax and structure the deal to your advantage.

That’s why we always recommend business owners think about tax as soon as you start considering a sale. A little preparation now can save you a lot of money and headaches later on.

What’s an Asset Sale (And Why Does It Matter)?

When talking taxes on the sale of a business, the way in which the deal is structured makes a big difference. The two main types of business sale in the UK are:

• Asset Sale: The buyer purchases specific assets of the business (such as stock, equipment, customer contracts, goodwill and intellectual property). The business entity itself (e.g. the limited company) remains with the seller.
• Share Sale: The buyer acquires shares in the company that owns the business. The company’s assets (and liabilities) stay with the company – the ownership just changes hands.

This article focuses on asset sales, as they’re the most common route for small and medium business transfers. Why does this matter for tax? Because the taxes you face are different depending on whether you’re selling company assets or shares – and the impact also varies by your business structure.

How Does Business Structure Affect Tax on Sale?

The type of legal structure your business has plays a huge role in what taxes you’ll pay when selling up. Here’s a quick overview of the three most common structures and their typical tax treatments in an asset sale:

Business Structure	Who Sells	Tax on Profits from Sale
Sole Trader	Owner	Capital Gains Tax (CGT) applies on profits from selling business assets
Partnership	Partners	Each partner pays CGT on their share of profits from asset sales
Limited Company	Company itself (as a separate legal entity)	Corporation Tax applies to the company’s profits from selling assets

If you’re not sure what structure you have, or are thinking about changing before a sale, make sure you read more about the key differences between a partnership and a company structure.

Understanding Capital Gains Tax (CGT) On Business Sales

If you’re a sole trader or a partner in a partnership, the main tax you’ll face on selling your business assets is Capital Gains Tax (CGT). But what exactly is CGT, and how does it affect your sale?

What Is Capital Gains Tax?

CGT is a tax charged on the profit (the ‘gain’) you make when you sell or dispose of a business asset that has increased in value. It’s not the total amount you receive – it’s worked out as:

• Sale price of the asset
• Minus what you paid for it (the cost or ‘base value’)
• Minus certain allowable expenses (e.g. legal fees and selling costs)

You only pay CGT on the gain, not the entire proceeds.

Which Business Assets Are Liable for CGT?

CGT can apply to a wide range of business assets, including:

• Stock, inventory, and raw materials
• Machinery, vehicles, and equipment
• Goodwill (the reputation and customer relationships of your business)
• Intellectual property, such as trademarks
• Property or land used by the business

If you’re considering selling intangible assets – such as your business brand or online store – you may also want to read about how to protect your intellectual property when selling.

What’s the CGT Rate and Are There Reliefs Available?

For most business owners, CGT is charged at either 10% or 20%, depending on your overall taxable income. However, you may qualify for special reliefs which can reduce your tax bill, including:

• Business Asset Disposal Relief (BADR): Formerly Entrepreneurs’ Relief, this allows you to pay a reduced 10% CGT on qualifying business assets, up to a lifetime limit (currently £1 million).
• Rollover Relief: If you reinvest in certain other business assets, you may defer CGT until the new asset is sold.

It’s smart to check your eligibility for these reliefs with your accountant or legal advisor before completing the sale. For more on how business structure affects your liabilities, see our dedicated guide to capital gains tax on business sales.

How Does Corporation Tax Apply for Limited Companies?

If your business operates as a limited company, selling business assets is treated quite differently. Rather than paying CGT personally, the company pays Corporation Tax on any profit made from the sale of assets.

How Are Gains Calculated?

When a limited company sells its assets (like property, equipment, or goodwill), any increase in value is considered a chargeable gain. The gain is worked out in much the same way as for individuals:

• Proceeds from the sale
• Minus the original cost to the company
• Minus allowable selling costs and certain reliefs

The resulting gain is added to the company’s taxable profits, and Corporation Tax is applied at the current rate (as of 2024, between 19% and 25% depending on profit level). You can read more about the basics of limited company tax and structure here.

How Are Funds Passed To Owners?

If you want to take money out of the company after the asset sale, you may face further taxation at a personal level (such as on dividends or share sales). Planning how and when to extract funds is just as important, so don’t forget to discuss the options with your accountant or a specialist business lawyer.

Selling Through a Share Sale: Does This Change The Tax Situation?

While this article focuses on asset sales, it’s worth mentioning that if you sell the shares in your company (rather than just the assets), the tax consequences are different. In a share sale:

• The individual selling the shares may be liable for CGT on any gain (if they’re a UK resident).
• Your company itself isn’t selling anything, so Corporation Tax typically doesn’t apply on the share transfer.

This can sometimes be a more tax-efficient route, depending on your goals and the buyer’s preferences. For a comparison and practical checklist, see our article on share sale vs asset sale.

What’s The Best Way to Minimise Tax When Selling My Business?

If you’re starting to feel like selling a business and taxes are more complicated than you realised – you’re not alone! Many business owners are surprised by just how many variables affect the tax bill when exiting. Here’s a practical step-by-step guide for a tax-smart business sale:

1. Review Your Current Business Structure: Are you a sole trader, partnership, or limited company? The structure shapes your main tax exposure.
2. Get an Accurate Valuation of Your Assets: Make sure you understand what each asset is worth and what you paid for it – this helps in calculating gains and tax.
3. Consider The Sale Structure: Are you selling assets or shares? Will the buyer take on liabilities? Structure impacts your tax outcome.
4. Check Your Eligibility for Reliefs: For example, Business Asset Disposal Relief (BADR) isn’t automatic – you must meet strict criteria.
5. Plan for Timing: Sometimes timing the sale across different tax years, or staggering assets sales, can reduce your tax bill.
6. Factor in Additional Taxes: Don’t forget VAT, Stamp Duty Land Tax (for property), and potential income tax on dividends or cash extraction.
7. Consult Legal and Tax Professionals Early: Engage an accountant and a legal adviser before you sign any heads of terms or agreements – not after.

It’s also vital to have the right legal documentation for a sale, whether that’s professionally drafted business sale agreements or clear contracts covering assets, liabilities, and warranties.

What Happens If I Get It Wrong?

Tax issues from a business sale can take years to show up – often long after the dust settles. The risks of not planning include:

• Unexpected tax bills from HMRC, sometimes with interest and penalties
• Disputes with the buyer if the tax implications weren’t made clear up front
• Reduced sale proceeds if reliefs aren’t claimed or deadlines are missed
• Personal liability if the business structure wasn’t set up to protect you

This is why solid legal and tax foundations protect you and set you up for long-term success – even when it’s time to move on.

Key Takeaways: Selling a Business and Taxes

• The main tax on selling business assets is Capital Gains Tax (for sole traders and partnerships) or Corporation Tax (for limited companies).
• Your business structure fundamentally affects what taxes you face, so get clear on this early.
• Plan your asset sale ahead of time to claim eligible reliefs and structure the deal for maximum tax efficiency.
• Always get professional legal and accounting advice before you finalise an agreement.
• Use written contracts to protect yourself, define what’s being sold, and ensure everyone’s clear on post-sale responsibilities.

Need Help With Selling Your Business or Understanding the Tax Implications?

If you’re thinking about selling your business – or just want to make sure you’re set up for the best tax result – it’s always smart to get advice from a qualified legal expert. At Sprintlaw, we can help you navigate selling your business, draft the right agreements, and work alongside your accountant to keep your exit as stress-free as possible.

You can reach us for a free, no-obligation chat on 08081347754 or by emailing team@sprintlaw.co.uk. We’re here to help you protect your interests from day one – and every day, until you hand over the keys.