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Capital Gains Tax Calculator 2026/27 (UK CGT)

Selling shares, a second property, crypto or other assets? Enter your gain and income to estimate your Capital Gains Tax for 2026/27.

Sale price£What you paid£Buying/selling costs and improvements£Losses to set off£Your other income this year£Salary, pension and so on, before taxBusiness Asset Disposal ReliefQualifying business disposals: 18% from 6 April 2026

Capital Gains Tax

£3,463.80

On a gain of £20,000 · 2026/27

Gain	£20,000
After losses	£20,000
Annual exempt amount	−£3,000
Taxable gain	£17,000
Taxed at 18%	£10,270
Taxed at 24%	£6,730
Tax due	£3,463.80

Estimates for information only, using 2026/27 rates for England, Wales and Northern Ireland unless stated. Not financial or tax advice; check your own situation with HMRC or a qualified adviser.

How it works

Your gain is the sale price minus what you paid and allowable costs (like fees and improvements). You can deduct losses from the same or earlier years.

The first £3,000 of gains each tax year is tax-free (the annual exempt amount).

Gains falling within your unused basic-rate band are taxed at 18%, and the rest at 24%. The same rates now apply to residential property. Business Asset Disposal Relief is 18% from 6 April 2026.

Frequently asked questions

Do I pay CGT when I sell my home?+

Usually not. Private Residence Relief normally covers your main home.

What is the CGT allowance for 2026/27?+

£3,000 per person. Couples can each use their own allowance.

When do I pay CGT on property?+

For UK residential property you report and pay within 60 days of completion.