LandlordGauge

Capital gains tax on rental property calculator UK

Estimate your share of a UK rental property gain, 2026/27 Capital Gains Tax and the 60-day reporting deadline, with costs and assumptions explained.

Your property sale

Whole-property price, excluding costs below.

Whole-property proceeds, before sale costs.

Format: DD/MM/YYYY

Purchases from 1 April 1982. Earlier acquisitions need a market value.

Format: DD/MM/YYYY

Starts the 60-day clock. CGT estimate requires exchange in the same 2026/27 tax year.

Whole-property purchase, sale and qualifying improvement costs. Exclude mortgage repayment, interest and routine repairs.

After your Personal Allowance and Income Tax reliefs, before paying tax. Include taxable rent, exclude this gain. Not gross salary or take-home pay.

Your beneficial share. Enter 100 for sole ownership; 50 for an equal half share.

Your share, tax and deadline

Example result

Estimated CGT due

£1,728

Your share of the gain

£12,600100% share, after allowable costs

Your £12,600 property gain gives estimated CGT of £1,728 after your unused annual exemption, assuming exchange and completion both fall in 2026/27.

How the tax adds up

Whole-property gain after costs
£12,600
Annual exemption assumed available
£3,000
Taxable gain at 18%
£9,600
Taxable gain at 24%
£0

60-day reporting deadline

11 December 2026

60 calendar days after completion; the following day is day one. Weekends and bank holidays count. This is a filing deadline, not a tenancy notice; no service method applies.

Example: HMRC taxable income of £20,000 and illustrative property prices and dates.

Rates as of