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Capital Gains Tax calculator

Quickly know how much Capital Gains Tax you owe on your profits from property, shares, crypto and more.

Your situation

Outlined number oneImage of an arrow
How did you make money?
Profit from capital gains
Annual salary
Other income

Tax and profit

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  • Your profit from
    £3,000 tax-free CGT allowance
  • Capital Gains Tax to pay
  • Profit after tax

How your capital gains tax is calculated

The total capital gains tax (CGT) you owe depends on two things:

  • How much you earn in total
  • What type of assets you sell

Your overall earnings determine how much of your capital gains are taxed at – 10% or 20%.
Our capital gains tax rates guide explains this in more detail.

In your case where your capital gains from shares were £20,000 and your total annual earnings were £69,000:

Capital gains tax (CGT) breakdown

You pay no CGT on the first £3,000 that you make

You pay £127 at 10% tax rate for the next £1,270 of your capital gains

You pay £3,146 at 20% tax rate on the remaining £15,730 of your capital gains

Tax bill amount £3,273
I want to pay by
Savings frequency

You need to save

£4.91 per day

to pay your £3,273.00 tax bill by 31/1/2026 which is in 666 days

Declare your capital gains via your Self Assessment

Declare your capital gains earnings and pay any Capital Gains Tax you owe via your Self Assessment tax return with TaxScouts.

Our accredited accountants will handle it all, so sit back, relax, and let a professional take the wheel.

What is Capital Gains Tax? 

Capital Gains Tax is a tax you pay on your profits. You declare anything you’ve earned from selling an asset (over a certain threshold) via a tax return. You’ll then need to file and pay your Capital Gains Tax bill by 31st January each tax year

The rate of CGT that you pay each year depends on the type of asset you’ve sold and how much you earn overall.

Use our Capital Gains Tax calculator to work out what tax you owe on your investment profits. Capital Gains Tax is basically a tax that you’re charged on money you make from selling an asset. When we say asset, this can mean any of the following that generate taxable gains:

  • Property
  • Jewellery
  • Paintings
  • Cryptocurrency
  • Stocks and shares
  • And more!

How is Capital Gains Tax calculated?

As you can see from using the calculator, you pay different rates depending on what you’re selling. Check out the basic Capital Gains Tax formula here 👇

Type of asset Basic rate band

(income < £50,270)

Higher rate band

(income > £50,270)

Shares 10% 20%
Residential property 18% 24%
Cryptocurrency 10% 20%
Other 10% 20%

When do I owe CGT?

After selling an asset, you only owe Capital Gains Tax on profits above £3,000 in the 2024/25 tax year. Anything less than that is tax-free. When you earn more than £3,000 during a tax year, this is taxable income which you will need to declare to HMRC and file a tax return. Make sure you do this by 31st January the tax year after you profit.

In practice, here are the deadlines to be aware of:

  • You make £70,000 profit from selling a vintage car in June 2024
  • This is the 2024/25 tax year
  • Register for Self Assessment to declare the income by 5th October 2025
  • Pay tax on your profit by 31st January 2026

If you want professional tax advice, use our tax consultation service for a 1-1, 30 min session with an accredited accountant.

Get Advice

2020 Capital Gains Tax changes 

If you sell a residential property, you now need to declare your profits within 30 days and pay any tax you owe. It’s via a digital service called the Real Time Capital Gains Tax Service. The 30 day rule has been in place since 6th April 2020. If you don’t do this, you could face a fine from HMRC. Be aware that this includes both UK residents and those who own UK property but live abroad. Take a look at the following exceptions to these changes:

  • The legally binding contract for the sale was made before 6th April 2020
  • You’re eligible for full private residence relief
  • You sold the property to your spouse or civil partner
  • The profit you made was within your tax free allowance 
  • You sold the property for a loss
  • The property is outside the UK

Read more about the CGT changes.

Do you owe CGT when you sell your home?

No. If you’re selling your main home, you don’t owe CGT. You only pay capital gains tax on property if you’re operating a buy-to-let business or have a second home that you’re selling. 

You also don’t need to worry about paying any CGT on your rental income. You’ll owe Income Tax on this and CGT at the point at which you sell up (if you’re not also living in the house). Read more about rental income tax via our guides.

How can I reduce the CGT I owe?

Reducing the CGT you owe may be tricky. There’s no tax credit or tax relief associated with it, however you can claim the Capital Gains Tax allowance to reduce your tax liability. Every tax year, you can earn up to £3,000 tax-free (previously £6,000) in profit. Anything less than this means you won’t have to file a tax return.

Filing your Self Assessment tax return: TaxScouts vs HMRC

Filing with TaxScouts is just easier. Not only that, but we’re friendlier, jargon-free and have expert accountants on our side. 

  • An intuitive and well-loved platform
  • We can file your tax return quickly
  • Your accredited accountant does it all for you

Looking for tax help?

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