£300,000 Capital Gain After Tax 2025-26
Residential Property · £45,000 income · Effective CGT rate: 23.65%
CGT breakdown 2025-26
| Item | Amount |
|---|---|
| Total gain | £300,000 |
| CGT annual allowance (tax-free) | −£3,000 |
| Taxable gain | £297,000 |
| Basic rate portion (18%) | £5,270 |
| Higher rate portion (24%) | £291,730 |
| CGT due | −£70,964 |
| Gain after CGT | £229,036 |
CGT rate applied
Your gain spans both rate bands: £5,270 at 18% (basic rate) and £291,730 at 24% (higher rate).
2025-26 CGT rates — Residential Property
How much CGT on a £300,000 gain with £45,000 income?
A £300,000 capital gain on residential property with £45,000 salary results in a CGT bill of £70,964 for 2025-26. After deducting the £3,000 annual CGT allowance, your taxable gain is £297,000. You keep £229,036 of your £300,000 gain, giving an effective CGT rate of 23.65%.
Your gain spans both rate bands: £5,270 at 18% (basic rate) and £291,730 at 24% (higher rate).
Capital Gains Tax on residential property uses two rates in 2025-26: 18% for gains within the basic rate band and 24% for gains in the higher rate band. Whether your gain falls into the basic or higher rate band depends on how much of the basic rate band (up to total income of £50,270) remains after your employment income. Your income of £45,000 is added first, and your capital gain sits on top. Report CGT via Self Assessment by 31 January following the tax year.
Frequently asked questions
How much CGT do I pay on a £300,000 gain?
On a £300,000 capital gain from residential property with £45,000 salary, you pay £70,964 in Capital Gains Tax for 2025-26. The first £3,000 is covered by your annual CGT allowance, leaving a taxable gain of £297,000. Your effective CGT rate on the total gain is 23.65%.
What is the CGT rate on residential property in 2025-26?
Residential property gains are taxed at 18% (basic rate band) and 24% (higher rate band) for 2025-26. The rate that applies to your gain depends on how much of the basic rate band (up to £50,270 combined income and gain) remains after your other income.
How does my £45,000 income affect my CGT rate?
Your £45,000 salary uses part of the basic rate band. After subtracting your personal allowance (£12,570), your taxable income is £32,430, leaving £5,270 of basic rate band for your capital gain. Your gain spans both rate bands: £5,270 at 18% (basic rate) and £291,730 at 24% (higher rate).
What is the CGT annual allowance for 2025-26?
The Capital Gains Tax annual allowance for 2025-26 is £3,000. This means the first £3,000 of your total capital gains in the tax year is tax-free. Any gains above this amount are subject to CGT at the applicable rate (10%/18% basic rate or 20%/24% higher rate depending on asset type and your income level).
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