Capital gains tax on property sale UK 2026 remains a significant consideration for landlords and property investors. With the annual exempt amount continuing its reduction and property values remaining high, understanding your CGT liability is crucial when planning property disposals.

The rules around capital gains tax can significantly impact your net proceeds from a property sale. Getting the calculations wrong or missing available reliefs could cost thousands in unnecessary tax.

CGT Rates and Annual Exempt Amount for 2026

For the 2025/26 tax year, the capital gains tax rates on residential property disposals are:

  • 18% for basic rate taxpayers
  • 24% for higher and additional rate taxpayers

These are the definitive rates for property sales completing in the 2026 tax year. They apply to the taxable gain, which is calculated after deducting your annual exempt amount and all allowable costs. Your income tax band for CGT purposes is determined by adding the taxable gain to your other taxable income (like salary or rental profits) for the year.

Example: A landlord with a £35,000 salary makes a £60,000 property gain. The personal allowance and basic rate band for 2025/26 mean they would pay 18% CGT on the first portion of the gain that falls within the remaining basic rate band, and 24% on the portion that pushes them into the higher rate band.

The annual exempt amount for capital gains tax continues its significant reduction:

  • 2025/26: £3,000
  • 2024/25: £3,000
  • 2023/24: £6,000

This dramatic reduction from the previous £12,300 means most property sales now generate taxable gains. Even modest price increases since purchase often exceed the £3,000 exemption.

Calculating Your Capital Gain

Your capital gains tax on property sale UK 2026 is calculated on the gain, not the sale price. The basic calculation is:

Sale proceeds - Purchase costs - Improvement costs - Sale costs = Taxable gain

Allowable Deductions

You can deduct several costs when calculating your gain:

  • Original purchase price
  • Stamp duty and legal fees on purchase
  • Estate agent fees and legal costs on sale
  • Capital improvements (not repairs or maintenance)
  • Indexation allowance (for properties owned before April 1998)

A landlord selling a £400,000 property bought for £250,000 with £20,000 improvements and £15,000 sale costs would have a gain of £115,000 before the annual exemption.

Key Reliefs and Exemptions

Principal Private Residence Relief

If you lived in the property as your main home at any point, you might qualify for partial principal private residence relief. The final 9 months of ownership always qualify for relief, regardless of whether you lived there.

Lettings Relief

Lettings relief was significantly restricted from April 2020. It now only applies if you shared occupancy with tenants, making it largely irrelevant for most BTL properties.

Business Asset Disposal Relief

This relief (formerly Entrepreneurs' Relief) typically doesn't apply to residential property investments. It's mainly relevant for commercial property used in a business.

Timing and Planning Strategies

The timing of your property sale can significantly impact your capital gains tax liability. Consider these factors:

Tax Year Planning

Spreading disposals across tax years can help utilise multiple annual exemptions. However, with only £3,000 available each year, this strategy has limited impact for high-value properties.

Income Management

If possible, time sales for years when your other income is lower. This might keep you in the basic rate band, reducing CGT from 24% to 18%.

Loss Harvesting

Capital losses can offset gains in the same tax year or be carried forward indefinitely. Consider realising losses on underperforming properties to reduce overall CGT liability.

Spousal Transfers

Transfers between spouses are generally tax-free. This can help utilise both partners' annual exemptions or take advantage of different tax rates.

Professional Advice

Given the complexity and potential costs involved, consider seeking specialist advice. Our services include CGT planning and compliance support for property investors. The interaction between various reliefs, timing considerations, and structural options means professional guidance often saves more than it costs.

Company vs Personal Ownership

Properties held in companies face corporation tax on gains, not CGT. For 2025/26, corporation tax rates are:

  • 19% on profits up to £50,000
  • 25% on profits over £250,000
  • Marginal rate between £50,000-£250,000

This can provide significant savings compared to higher rate CGT. However, incorporation brings other considerations including stamp duty costs and ongoing compliance requirements.

Reporting, Payment and Record Keeping

Capital gains tax on property sale UK 2026 must be reported within strict deadlines:

  • 60 days from completion to report the disposal
  • 31 January following the tax year for any additional tax due

You must make a payment on account within 60 days, even if you expect a refund after claiming reliefs or losses.

Maintain detailed records of all property-related costs and improvements. HMRC can enquire into disposals for up to four years after the filing deadline, or longer if they suspect deliberate errors. Key documents include:

  • Original purchase documentation
  • Receipts for all improvements and capital expenditure
  • Estate agent and legal fees
  • Evidence of any periods of personal occupation