Capital Gains Tax calculator

Understand the ins and outs of Capital Gains Tax, and whether you might have to pay it. Pop your details into our calculator, and we'll do the rest.

What is Capital Gains Tax?

Capital Gains Tax is a tax you pay on any profit you get from selling an asset. You'll pay tax only on the gain, not the full sale amount. This can apply to investments like stocks, shares or bonds outside of an ISA or a pension. It can also apply to assets such as property, crypto and any business assets.

Delve into the specifics of Capital Gains Tax in our handy article.

Find out how much Capital Gains Tax you might be due to pay

Any and all information on this page is for educational purposes and is not an exact representation of what you will get if you decide to invest or save your money. We aim to give you idea of what Capital Gains Tax you could have to pay based on information you have provided. All investments come with risk and they can go down as well as up, and you may get back less than what you put in.

Information provided by the calculator should not be taken as advice and you should speak with a financial adviser for guidance on Capital Gains Tax.

JavaScript is required to use this calculator, but is not currently available; please try again.

Capital Gains Tax calculator

Use our calculator to find out how much Capital Gains Tax (CGT) you could owe on the profits you make from property and other assets, such as shares. 

You'll need to declare anything you've earned from selling assets over a certain threshold on a tax return.

The rate of Capital Gains Tax you pay each year will depend on the type of asset you've sold and how much you have earned overall.

This is required on profit made from additional properties but excludes your primary home.

Your primary home is the one you have lived in for the whole period of ownership, and where private residence relief should be available.

This is required for profit made on assets other than property.

Other assets include:

  • Most personal possessions worth £6,000 or more, except cars you have used for personal travel.
  • Any shares or funds not held in an ISA or Personal Equity Plan (PEP)
  • Business assets

This should be your annual salary or pension income before tax and not include savings interest.

Income tax is a tax you pay on income earned. You pay an income tax on things like:

  • Money you earn from employment or self-employment
  • Rental or trading income
  • Retirement income such as pension, drawdown or annuities

This should be any additional income before tax and should not include savings interest.

Your results

Based on the savings you've told us about your total Capital Gains Tax to pay could be:

Of which, your property Capital Gains Tax to pay is:

Of which, your other assets Capital Gains Tax to pay is:

How Capital Gains Tax is calculated

Any profits on your assets, including those from additional properties, will be taxed at 18% for basic rate taxpayers or 24% if you're a higher rate taxpayer. 

For the current tax year, the amount that is tax-free is £3,000 and this is offset against any gains taxed at a higher rate.

The information provided on this calculator is intended for individual use only and should not be used by trustees, executors or those with carried interest gains.

What does this mean?

After selling an asset, you may have to pay Capital Gains Tax on profit made above £3,000. Any profit less than this is currently considered tax-free.

You must declare taxable profits to the HMRC by filing a tax return. Please make sure you declare this by January 31st, for the tax year after you profit.

All information on this page is for educational purposes only and is not an exact representation of the tax you might be liable to pay. Capital Gains Tax rules can be complicated and often change. You can find detailed information on the gov.uk website.

Ways to invest with us

The investment gains from a stocks and shares ISA are free of Capital Gains Tax, so are a tax-efficient way to invest for your future. If you've already used your ISA allowance, you could consider an investment account. With both you'll have:

Remember, the value of an investment can go down as well as up, and you could get back less than you put in. Your tax benefits will depend on your circumstances and may change in the future.

Aviva Stocks & Shares ISA

Invest with our tax-efficient Stocks & Shares ISA and make full use of your £20,000 allowance each year.

Find out more about our ISA "Find out more about our ISA"

Aviva Investment Account

Reached your ISA allowance limit? Keep investing with our Investment Account.

Find out more about our Investment Account "Find out more about our Investment Account"

Investing explained

Our guides will take the mystery out of investing your cash.

What is Capital Gains Tax?

Selling something of value? You could have tax to pay. Our guide can help clear things up.

Learn about tax year end

Take the time to give your finances a spring clean before tax year end.

What is a general investment account?

If you've used up your ISA allowance but want to keep investing a general investment account could be ideal.

What is a stocks and shares ISA?

A stocks & shares ISA has a tax efficient wrapper that is put around your investments, so investment growth earned within this ISA is tax-free.

See all investing guides