The Basics of Capital Gains Tax

Capital Gains Tax (CGT) is a tax on the profit (the gain) you make when ‘disposing’ of an asset which you own. Disposal of an asset usually means it’s been sold, but it can also mean giving it away, swapping it for something else, or receiving compensation for its loss.

Capital Gains Tax normally only applies to individuals or business structures where there’s no legal distinction between you and your business.

For instance sole traders or someone in a partnership can be liable for Capital Gains Tax because they’re not legally ‘separate’ from the business they run.

An incorporated business (such as a limited company) will pay Corporation Tax on any profit it makes from disposing of a business asset instead.

Capital Gains Tax can get a bit complicated, so in this post we’ll take you through the basics and give you some simple scenarios to show you how it works.

Capital Gains Tax for individuals

Most of us won’t need to think about Capital Gains Tax that often, but if you dispose of a valuable asset it might cross your radar. The most frequent questions around Capital Gains Tax relate to houses and cars but you might also encounter it if you dabble in cryptocurrency.

Will I need to pay Capital Gains Tax when I sell my house?

Property prices have risen rather dramatically over the years, so the sale of your house might mean a very substantial gain indeed. The good news is that you won’t normally need to pay Capital Gains Tax on property as long as:

It’s your only home, which you’ve lived in as your main residence for all the time you’ve owned it
You haven’t let part of it out (not including having a lodger)
You haven’t used part of your home exclusively for business purposes (using a room as a temporary or occasional office does not count)
The grounds, including all buildings, are less than 5,000 square metres (just over an acre) in total
You didn’t buy it with the aim of making a gain

Do I need to pay Capital Gains Tax if I sell my car?

If you’re lucky enough to make money on the sale of your car, then you won’t pay Capital Gains Tax on this as long as it has not been used for business purposes.

This goes for classic cars too. So, if you have an E-type sitting in the garage, you can decide to sell it and release the massive gain it has made over the last few years, without getting clobbered by tax.

What assets are exempt from Capital Gains Tax?

The key here is what the asset was used for, and how much you get when you dispose of it. Any profit on selling your car is exempt from Capital Gains Tax as long as the car wasn’t used for business. Your main home that you own is usually exempt too, as are:

Gifts to a registered charity
Gifts to a spouse or civil partner
Investments in PEPs or ISAs
UK government gilts and Premium Bonds
Competition, betting, lottery, or pools winnings

Do be aware though that just giving away something (unless it is to your spouse or a charity) will be treated exactly like selling it, and you’ll need to declare the value at the time of sale.

Sensible tax planning is perfectly acceptable, but we’d never advise people to try and pull the wool over HMRC’s eyes. They have seen it all before!

Capital Gains Tax for businesses

If your business is a limited company, then it won’t pay Capital Gains Tax. Instead, any gains are taxed as Corporation Tax. It’s a bit different if you operate as a sole trader or partnership though.

Because there’s no legal distinction between you and your business, any gains the business makes are considered ‘yours’ so you’ll need to include these gains as part of your Self Assessment tax return.

Whilst a sole trader will be responsible for all of the gain they make, partners will only need to work out their share of each gain or loss according to their share in the partnership.

It’s worth asking for advice if you’re not sure, because Capital Gains Tax is a complex area for businesses. For example, a business set up to invest in fine art will pay tax differently to a business that just happens to have made a gain on some art it had on the office wall.

If you use capital gains to buy another asset

If you make a ‘capital gain’ because you’ve disposed of a business asset, but then use some or all of that amount to buy another business asset, you might be able to claim Business Asset Rollover Relief to delay paying tax on the gain.

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Different type of assets in a business

When we talk about Capital Gains Tax for businesses, then it’s important to understand what the term asset means within a business context. A business might have two different types of asset that it uses.

Current assets

The first category refers to assets you use for trading and includes things like stock you sell to customers, raw materials to create products, or working capital.

In accounting terms, these are seen as things which will be used up within the next 12 months, so although they are assets, they are short-term in nature.

From a taxation point of view, these short-term assets form part of the trading of the business. If the business makes a profit when it comes to sell them, then it will pay tax in the normal way.

Fixed assets

The second category are long-term assets. In other words, things which are likely to be around for more than a year, and it is this category that is liable to Capital Gains Tax.

It’s useful to remember that a gain doesn’t have to be made on a physical thing. Capital Gains Tax can also be payable on intangible items like brands, trademarks and patents.

Working out your gain for Capital Gains Tax

Capital Gains Tax is worked out based on the profit you make, rather than on the full amount of the sale. In plain terms, it’s the difference between what the asset was worth when you acquired it, and what you sold it for.

You can also deduct eligible costs relating to the gain you made, and then pay Capital Gains Tax on the amount left over.

For example, if you paid advertising fees to sell the asset, or you spent money to improve the asset beyond normal repairs, you can deduct these costs from the gain you make. Working out the value gets a bit more complicated if you dispose of assets known as a ‘chattel set’, where similar items can be combined to form a set – such as individual pieces in a chess set.

Is there a tax-free allowance for Capital Gains Tax?

It’s not all doom and gloom, and there is a tax-free allowance available before you start paying Capital Gains Tax. Known as the Annual Exempt Amount, the allowance you’re entitled to depends on whether you’re an individual or a trustee.

	2025/26
Individuals	£3,000
Trustees	£1,500

So, if you’re an individual and the total of all gains is less than £3,000 in 2025/26, then you won’t pay any Capital Gains Tax at all.

If all your gains for the year total £10,000 you’ll only pay Capital Gains Tax on the portion of the gain which is over the allowance (in this example, £7,000 is taxable). And never forget! We’re looking at the gain here, and not the sale price.

Do I need to report capital gains below the allowance?

No, you only need to report and pay Capital Gains Tax on taxable gains above the allowance.

Capital Gains Tax relief for businesses

There are CGT relief schemes available, such as Business Asset Disposal Relief, if you need to pay Capital Gains Tax on gains you make through your business. The eligibility criteria and the level of relief available does vary, so it’s always worth getting advice!

How much Capital Gains Tax will I pay?

The rate of Capital Gains Tax you pay on the gains you make above the allowance depends on what the asset is, and the rate of income tax you pay.

The rate of Capital Gains Tax you’ll need to pay depends on the items you dispose of, and what type of taxpayer you are.

6th April 2024 to 29th October 2024 Capital Gains Tax Rate

	Basic Rate Taxpayer	Higher Rate Taxpayer	Trustee
Gains from residential property	18%	24%	28%
Gains from other chargeable assets	10%	20%	20%

30th October 2024 onwards and 2025/26 – Capital Gains Tax Rate

	Basic Rate Taxpayer	Higher Rate Taxpayer	Trustee
Gains from residential property	18%	24%	28%
Gains from other chargeable assets	18%	24%	24%

Working out Capital Gains Tax

You can use our online Capital Gains Tax calculator to estimate your CGT bill for free, but because this may all seem a little theoretical we thought it would be helpful to include an example. The starting point is to work out your gain.

This is simply the selling price, minus the cost of acquiring the asset. Remember, you are also allowed to offset any costs of selling, purchase costs, and the value of any improvements you have made in the meantime.

In May 2025 John makes a profit selling a painting he bought a few years ago. It is his only gain in the tax year. He currently earns £22,000 per year from his full-time job.

Proceeds from the disposal What did John get in return for disposing of the asset? In this example, it’s the price he sold the painting for.	£30,000
Total costs and expenses What John spent on the asset. Auction fees: £3,000 Original purchase cost: £10,000	£13,000
Total gain The proceeds from the disposal, minus the total costs.	£17,000
Total taxable gain The total gain, minus the Annual Exempt Amount, which in 2025/26 is £3,000	£14,000
John’s income for the tax year In this case it’s the taxable gain he made, plus his salary. Salary: £22,000 Total taxable gain: £14,000	£36,000
The rate of Capital Gains Tax To work out which rate of Capital Gains Tax to use, remember: John’s total income for the year is within the basic rate tax band The gain is from a chargeable asset, not property	18%
Capital Gains Tax to pay The total taxable gain multiplied by the rate of Capital Gains Tax	£2,520

Do I still need to report Capital Gains if I don’t owe any tax?

If you’re registered for Self Assessment then you’ll need to mention your gains in your tax return. If you’re not registered, you won’t need to report your gains as long as the total gains you make in a year are below the £3,000 Annual Exempt Amount, and the total amount you receive from these transactions is less than £50,000.

Tax is complicated, which is why it’s useful to chat with someone who knows their way around the subject. Learn more about our online accounting services for businesses, and make the most of any tax allowances and reliefs available. Call 020 3355 4047 or get an instant online quote.