Client Login 
Retirement assessment 
Book a call 
0117 990 2602 
Capital Gains Tax Calculator
The tax on selling shares, funds or a property that is not your home, at 2026/27 rates
Capital Gains Tax Calculator 2026/27
How much capital gains tax will you pay?
Enter what you sold it for, what it cost, any gains you have already made this year and your other income. The gain is taxed at 18% while it sits in your basic rate band and 24% above it.
Based on tax rates and allowances in England, 2026/27
Legal fees, stamp duty, agent fees, broker charges, and improvements that added value. Not repairs or mortgage interest.
Other gains since 6 April, after any losses. They use up the £3,000 exemption first, and any taxable part uses up basic rate band.
Salary, pension, rental profit and dividends. It decides how much of the gain gets the 18% rate.
What the numbers say
Enter the sale price, what you paid and your other income to see the tax on the gain.
,
,
How the gain is taxed
,
Illustrative only, not financial advice. Based on tax rates and allowances in England, 2026/27. Capital gains tax rates are the same across the UK. The order is: gain, less losses, less whatever is left of the £3,000 annual exempt amount, then tax. The taxable gain is taxed at 18% within your remaining basic rate band (£50,270 less other income) and 24% above it. We assume gains you have already made this year used the exemption first and sit in your basic rate band before this one. The same rates now apply to residential property and to other assets. Your main home is usually exempt under private residence relief. Gains on shares held in an ISA or pension are exempt. Business owners selling shares may qualify for Business Asset Disposal Relief at 18% on the first £1,000,000, which this tool does not apply. Losses must be claimed to be used. Gains on UK residential property must be reported and the tax paid within 60 days of completion. Other gains go on your self assessment return. The results depend entirely on what you enter and your circumstances may differ. Talk your figures through with us, the first conversation is free.
One set of rates now, and your income decides which applies
Capital gains tax is charged on the profit when you sell something that has gone up in value. The first £3,000 of gains each year is exempt. After that the rate is 18% while the gain sits within your unused basic rate band, and 24% once it goes above. From April 2026 the same two rates apply to residential property and to everything else.
Your other income matters because it fills the basic rate band first. Someone earning £30,000 has about £20,000 of band left for gains at 18%. Someone earning £60,000 has none, and pays 24% on the whole taxable gain. That is why the timing of a sale, and the year’s other income, change the bill.
The levers are mostly about timing and ownership. Selling across two tax years uses two exemptions. Transferring an asset to a spouse before sale is free of tax and brings their exemption and band into play. A pension contribution widens the basic rate band in the year of sale. Business owners selling shares have a separate relief, covered by our Business Asset Disposal Relief calculator. For the wider picture on tax, see UK tax brackets and allowances.
Frazer James is an independent, FCA-regulated firm of Certified Financial Planners. Advice covers the whole of the market, there is no initial fee, and the first meeting is free.
£3,000 exempt, per person, per year
It cannot be carried forward. Gains you have already made this tax year use it first, so the calculator asks for them. Spreading sales across tax years, or between spouses, uses more of it.
Your income sets the rate
Gains sit on top of income. What is left of the basic rate band is taxed at 18%, the rest at 24%. A high income year is an expensive year to sell.
Property has a 60 day deadline
A UK residential property that is not your main home must be reported and the tax paid within 60 days of completion. Other gains wait for the self assessment return.
Since working together, I feel more organised, more secure and more positive about the future. The advice has been exceptionally valuable, financially, professionally and personally.
Questions people ask about capital gains tax
What are the capital gains tax rates for 2026/27?
18% on gains within your remaining basic rate band and 24% above it. The same rates apply to residential property and to other assets. The annual exempt amount is £3,000. Business owners selling qualifying shares pay 18% on the first £1,000,000 under Business Asset Disposal Relief.
How do I work out my capital gain?
Sale price less what you paid, less the costs of buying, selling and improving the asset. Legal fees, stamp duty, agent and broker fees and improvements all count. Repairs and mortgage interest do not. Take off any capital losses, then whatever is left of the £3,000 exemption, and what remains is taxable.
Do I pay capital gains tax on my home?
Usually not. Private residence relief exempts your main home for the time you lived in it. A second home, a buy to let or a property you lived in for only part of the time can produce a taxable gain. The 60 day reporting rule applies to those.
Can I reduce capital gains tax by giving assets to my spouse?
Yes. Transfers between spouses and civil partners are free of capital gains tax. Your spouse takes on your original cost. Selling from their name uses their exemption and their basic rate band. It has to be a genuine transfer, and it needs to happen before the sale is agreed.
Are shares in an ISA or pension liable?
No. Gains on investments held inside an ISA or a pension are free of capital gains tax. That is one reason to hold growth assets there first. Shares held in a general investment account are liable, though the annual exemption and careful timing reduce the bill.
Reviewed by
BSc, MLIBF, PETR, Chartered ALIBF · Co-Founder and Chartered Associate
Chris has spent over a decade in financial planning and specialises in research and technical analysis. He checks every figure and calculation on this page before it is published.
TALK TO A CERTIFIED FINANCIAL PLANNER
A free, no-obligation conversation about the timing of a sale, spouse transfers and where the assets should sit next. No cost, and no pressure to proceed.