What are the UK Capital Gains Tax rates on shares?

For shares and other assets (not residential property), basic rate taxpayers pay 10% CGT and higher/additional rate taxpayers pay 20% CGT on gains above the annual exempt amount.

Do I need to report capital gains to HMRC?

You must report gains to HMRC if your total gains exceed the annual exempt amount (£3,000), or if you sold assets worth more than £50,000, even if you made a loss. You can report via Self Assessment or the Capital Gains Tax service.

Can I use losses to reduce my Capital Gains Tax?

Yes, you can offset capital losses against gains in the same tax year. If losses exceed gains, you can carry them forward to future years indefinitely. You must report losses to HMRC within 4 years to carry them forward.

Are ISA investments subject to Capital Gains Tax?

No, investments held within an ISA (Individual Savings Account) are completely exempt from Capital Gains Tax, regardless of the profit made. This is one of the key benefits of ISA investing.

Capital Gains Tax Calculator UK

Calculate CGT on shares and investments. £3,000 annual exempt amount for 2024-25. Basic rate 10%, higher rate 20% on gains above the allowance.

Calculate UK Tax

Buy Price (£) (incl. fees)

Sell Price (£) (after fees)

Quantity

Income Tax Band

What this calculator does

Calculates capital gain from your share sale
Applies £3,000 annual exempt amount (2024-25)
Calculates tax at 10% (basic rate) or 20% (higher rate)
Shows net profit after CGT deduction

How to Use

Enter purchase price

Total cost including dealing fees and stamp duty

Enter sale price

Amount received minus any selling costs

Add number of shares

Quantity of shares sold in this transaction

Select your tax band

Basic rate (10%) or higher/additional rate (20%)

Review allowance

First £3,000 of gains is tax-free

View results

See gain, CGT owed, and net profit

Example

You bought 500 shares of a FTSE 100 company at £4.00 per share in 2022. You sold them at £6.50 per share in 2025. You are a higher rate taxpayer (20% CGT rate).

Purchase Cost (500 × £4.00)£2,000

Sale Proceeds (500 × £6.50)£3,250

Capital Gain£1,250

Annual Exempt Amount- £1,250

Taxable Gain£0

CGT @ 20%£0

Net Profit£1,250

Since the gain (£1,250) is below the £3,000 annual exempt amount, no CGT is payable. You keep the entire profit.

UK Capital Gains Tax Rates (2024-25)

Asset Type	Basic Rate Taxpayer	Higher/Additional Rate
Shares & other assets	10%	20%
Residential property	18%	24%
Carried interest	18%	18% (from April 2025: 32%)

Annual Exempt Amount History

Tax Year	Allowance
2024-25	£3,000
2023-24	£6,000
2022-23 and earlier	£12,300

Note: The annual exempt amount has been significantly reduced in recent years.

Frequently Asked Questions

The annual exempt amount (tax-free allowance) for Capital Gains Tax is £3,000 for the 2024-25 tax year. This was reduced from £6,000 in 2023-24 and £12,300 in 2022-23.

Key Terms

Annual Exempt Amount

The tax-free allowance for capital gains each year. £3,000 for 2024-25.

CGT

Capital Gains Tax. Tax paid on profit when you sell or dispose of an asset that has increased in value.

ISA

Individual Savings Account. A tax-efficient wrapper where gains and income are completely tax-free.

Disposal

Selling, gifting, or transferring an asset. Each disposal may trigger a CGT calculation.

Allowable Costs

Expenses you can deduct from your gain, including purchase costs, stamp duty, and broker fees.

Bed and ISA

Selling shares and rebuying in an ISA to shelter future gains from tax.