Selling a property in the UK can yield substantial financial returns, but it often comes with tax obligations. If you are selling a second home, a buy-to-let property, or an inherited house, you will likely encounter Capital Gains Tax (CGT).
Understanding how CGT works, how much you will pay, and how to reduce your tax bill legally is essential for optimizing your property profit.
What Is Capital Gains Tax (CGT) on UK Property?
Capital Gains Tax is a tax on the profit (gain) you make when you sell or dispose of an asset that has increased in value. It is charged on the gain itself, not on the total sale price.
Formula:
$\text{Capital Gain} = \text{Selling Price} – (\text{Purchase Price} + \text{Allowable Deductions})$
Current Capital Gains Tax Rates on Residential Property
Your exact CGT rate depends on your total annual taxable income and whether the property sold is residential.
- Basic Rate Taxpayers: You pay 18% on taxable property gains that fall within your unused basic rate income tax threshold.
- Higher and Additional Rate Taxpayers: You pay 24% on taxable property gains.
| Taxpayer Status | Annual Taxable Income Threshold | CGT Rate on Residential Property |
| Basic Rate | Up to £37,700 | 18% |
| Higher Rate | £37,701 – £125,140 | 24% |
| Additional Rate | Over £125,140 | 24% |
(Note: Trustees and personal representatives also pay a flat rate of 24% on residential property gains).
The Annual CGT Allowance
Every individual in the UK is entitled to an Annual Exempt Amount for Capital Gains Tax.
- Individual Annual Allowance: £3,000 per person.
- Married Couples & Civil Partners: If you own the property jointly, both owners can combine their allowances, giving a total tax-free threshold of £6,000.
Do You Have to Pay CGT When Selling Your Main Home?
In most cases, no.
If the property you are selling was your primary residence throughout your entire ownership period, you automatically qualify for Private Residence Relief (PRR). PRR exempts 100% of the gain from CGT.
When Does CGT Apply to Property?
You will generally owe CGT if you are selling:
- Buy-To-Let Properties: Rental investment homes.
- Second Homes / Holiday Homes: Non-primary residences.
- Inherited Property: Based on the market value at the time of inheritance.
- Mixed-Use Property: A main home that includes substantial business premises or over 0.5 hectares of land.
What Deductions Can You Claim to Lower Your Tax Bill?
You can reduce your taxable gain by deducting legitimate allowable costs incurred during purchase, ownership, and sale:
- Purchase & Sale Fees: Solicitor fees, surveyor costs, and estate agent fees.
- Stamp Duty Land Tax (SDLT): Paid when purchasing the property.
- Capital Improvement Costs: Extensions, structural modifications, or loft conversions (regular maintenance and repairs like painting do not count).
Step-by-Step Calculation Example
Let us look at a practical scenario for a higher-rate taxpayer selling a buy-to-let property:
- Original Purchase Price (2018): £200,000
- Selling Price: £320,000
- Stamp Duty & Initial Legal Fees: £7,000
- Estate Agent & Conveyancing Fees on Sale: £5,000
- Extension / Renovation Costs: £15,000
Calculation Breakdown:
- Gross Gain: £320,000 – £200,000 = £120,000
- Total Allowable Costs: £7,000 + £5,000 + £15,000 = £27,000
- Net Gain: £120,000 – £27,000 = £93,000
- Taxable Gain (minus £3,000 Allowance): £93,000 – £3,000 = £90,000
- Tax Owed (24% Higher Rate): £90,000 × 24% = £21,600
Important Rules & Deadlines: The 60-Day Reporting Rule
UK tax rules require strict adherence to reporting deadlines when disposing of residential property:
- You must report and pay your estimated Capital Gains Tax through the official HMRC UK Property account within 60 days of the sale completion date.
- Missing the 60-day window results in interest charges and financial penalties from HMRC.
Key Takeaways
- Main Residence Exemption: Selling your main home rarely attracts CGT due to Private Residence Relief.
- Understand Your Rate: Residential property gains are taxed at either 18% or 24% based on income band.
- Track Every Expense: Keep invoices for legal fees, stamp duty, and major structural improvements to reduce your net gain.
- Don’t Miss the Deadline: Always report and settle your tax bill within 60 days of completion.