How to Reduce Capital Gains Tax on a Property: The Complete UK Guide for 2026

Selling a property in the United Kingdom can trigger a significant capital gains tax bill if you are not careful. However, with proper planning, there are several legitimate, HMRC-approved ways to reduce or eliminate CGT on your property sale.

Capital gains tax is charged on the profit you make when selling or disposing of an asset that has increased in value. For residential property that is not your main home, the rates for the 2025/26 tax year are 18% for basic rate taxpayers and 24% for higher and additional rate taxpayers.

This guide explains how to reduce capital gains tax on a property in the United Kingdom. It covers private residence relief, spousal transfers, the annual exempt amount, reinvestment strategies, and other legitimate tax planning techniques.

If you are also concerned about inheritance tax, our how to avoid inheritance tax guide covers estate planning strategies. For understanding the upcoming changes to inheritance tax rules, see our HMRC inheritance tax changes guide.

What Is Capital Gains Tax on Property

Capital gains tax is a tax on the profit you make when you sell, gift, or transfer property in the UK. You pay tax on the gain—the sale price minus the purchase price and allowable costs—not on the total sale amount.

CGT applies to:

• Second homes and holiday properties
• Buy-to-let rental residential property
• Inherited property you do not live in as your main home
• Commercial property

CGT does not usually apply to:

• Your main residence (generally exempt under Private Residence Relief)
• Property sold at a loss
• Gains within the £3,000 annual allowance

For the 2025/26 tax year, the annual exempt amount is £3,000 per person. This means you can make up to £3,000 in capital gains each tax year without paying any CGT.

Private Residence Relief: The Main Home Exemption

Private Residence Relief is the most valuable CGT relief available. It exempts your main residence from CGT when you sell.

If the property was your only or main residence throughout ownership, you pay zero CGT regardless of the gain amount. There is no limit to the relief.

To qualify for full private residence relief:

• The property must be your only or main residence throughout ownership
• You must not have been absent other than for an allowed period of absence
• Garden or grounds must not exceed the permitted area (half a hectare / 5,000 square metres)

If you did not live in the property full-time, you get partial relief calculated as:

(Months that qualify as your only or main residence ÷ Total months owned) × Gain = Tax-free amount

The final 9 months of ownership always count as residence as long as the property was your only or main residence at some point.

Example: Owned 120 months, lived in 60 months + 9 final = 69/120 = 57.5% exempt from CGT.

If you let out part of your main home and shared occupancy with your tenant, you may be able to claim lettings relief. Since April 2020, lettings relief is generally only available where you shared occupancy with the tenant. For most buy-to-let properties where you did not live with the tenant, lettings relief is not available.

How to Reduce Capital Gains Tax on a Property

There are several legitimate strategies to reduce or eliminate CGT on property sales. Here are the most effective approaches.

1. Use Your Annual Exempt Amount

Every individual has a CGT allowance of £3,000 for the 2025/26 tax year. Any gain within this threshold avoids tax. If unused, the annual exemption cannot be carried forward.

If you own multiple properties, consider selling them in different tax years to use the allowance each time.

2. Transfer Property to Your Spouse or Civil Partner

Transfers between spouses or civil partners are free of CGT. This allows couples to double their combined exemption and potentially use both basic-rate tax bands.

The exemption only applies if you are legally married or in a civil partnership and living together. The transfer must be unconditional and a genuine gift.

If the receiving spouse later disposes of the property, they will be treated as if they had paid an amount equal to the total of the transferor's costs.

3. Claim Business Asset Rollover Relief

Business Asset Rollover Relief allows you to defer CGT when selling land, buildings or fixed plant and machinery by purchasing a new qualifying asset.

The new asset must be purchased within specified time limits: no more than 12 months before the old asset was sold and up to 3 years after.

To qualify, both the old and new assets must be used in your business. If you only reinvest part of the proceeds, the taxable gain is the amount not reinvested.

Rollover relief is only a deferral of tax which will become payable when the replacement asset is sold.

4. Offset Capital Losses

Losses from the same tax year reduce your taxable gain. Unused losses can be carried forward indefinitely if reported to HMRC within four years.

If you have sold other assets at a loss, those losses can be offset against property gains.

5. Claim Allowable Expenses

You can deduct certain costs from your gain, including:

• Estate agent and solicitor fees for buying and selling
• Capital improvements that enhance the asset's value or extend its life

Only capital improvements are deductible. Routine maintenance like painting or repairs cannot be claimed against a capital gain. Examples of deductible improvements include adding an extension or installing a new central heating system.

6. Gift Property to Charity

Donating qualifying property to a charity provides exemption from CGT. Our cash gifts guide explains gift declaration rules if you are considering gifting property or assets.

Capital Gains Tax on Buy to Let Property

When selling a buy to let property, the gain is fully taxable subject to the annual exempt amount and allowable deductions.

The calculation works as follows:

Sale price minus purchase price minus allowable costs = Gross gain

Gross gain minus annual exempt amount (£3,000) = Taxable gain

Taxable gain × 18% or 24% = CGT due

Landlords who previously lived in the property before renting it out may qualify for partial private residence relief. The gain is apportioned based on the period lived in plus the final 9 months of ownership.

Routine repairs and maintenance cannot be deducted from the gain. Only capital improvements that enhance the asset's value or extend its life are deductible.

For ongoing rental income tax planning, our income tax calculator can help you understand your overall tax position, and our alternative retirement plan guide covers wider financial planning strategies.

Capital Gains Tax on Inherited Property

When you inherit a property, you are treated as acquiring it at its market value on the date of death.

The gain is calculated from the date of death, not from when the deceased originally bought the property. This means any increase in value during the deceased's lifetime is not taxed.

If you sell the inherited property quickly after inheriting, there may be no gain and no tax. If you rent it out or hold it for a period before selling, any increase in value from the date of death to the sale date is potentially taxable.

For more on inherited property tax, see our HMRC inheritance tax changes guide which covers the latest rules.

Timing Your Disposal

Timing your property sale can significantly affect your CGT liability.

Spreading sales over two tax years may allow you to use multiple annual allowances. Planning the timing of your disposal can help you use multiple annual exemptions.

The right timing can also reduce the risk of pushing yourself into a higher tax band. If your total income and gains in a single tax year push you into the higher rate band, you will pay 24% instead of 18% on your gains.

Common Capital Gains Tax Mistakes to Avoid

Several common mistakes can cost you money or lead to HMRC penalties.

Poor record keeping is a frequent error. Keep all records of purchase costs, improvement costs, and selling fees. Without proper records, you cannot substantiate deductions.

Incorrect property valuation at inheritance is another mistake. Ensure you have a professional valuation at the date of death to establish the correct base cost.

Missed tax reliefs are common. Many sellers do not claim all allowable expenses or reliefs they are entitled to.

Late reporting can result in penalties. If CGT is due on UK residential property, you must report and pay within 60 days of completion.

Final Thoughts

Capital gains tax on property can be a significant cost when selling a second home, buy to let property, or inherited property. However, with proper planning, there are several legitimate ways to reduce or eliminate CGT.

The most valuable relief is private residence relief, which exempts your main home from CGT entirely. If the property is not your main home, you can still reduce your liability by using your £3,000 annual exempt amount, transferring property to a spouse, offsetting losses, and deducting capital improvement costs.

Business asset rollover relief allows you to defer CGT when reinvesting in qualifying business assets. Careful timing of disposals across tax years can also help you use multiple annual allowances.

The reporting deadline for CGT on UK residential property is 60 days from completion. Make sure you keep proper records and seek professional advice for complex situations.

All information in this guide is based on official HMRC, GOV.UK, and professional advisory sources. Readers should seek professional advice before implementing any capital gains tax planning strategies, as rules are complex and subject to change.