Capital Gains Tax for Landlords: Planning Your Property Sales

When you sell a rental property for more than you paid for it, the profit is subject to Capital Gains Tax (CGT). For landlords, CGT can represent a substantial bill, potentially tens of thousands of pounds on a single property sale. Understanding how CGT is calculated, what deductions you can claim, and how to plan the timing of sales can significantly reduce your liability.

How CGT Is Calculated on Rental Property

The basic CGT calculation is straightforward: take the sale price, subtract the original purchase price, subtract allowable costs, and the remainder is your chargeable gain. From that gain, deduct your annual CGT allowance, and pay tax on the rest at the applicable rate.

Chargeable Gain = Sale Price - Purchase Price - Allowable Costs - Annual Exempt Amount

Current CGT Rates for Residential Property

Residential property attracts higher CGT rates than other assets. The current rates for individuals are:

• Basic-rate taxpayers: 18% on gains falling within the basic rate band
• Higher-rate and additional-rate taxpayers: 24% on gains above the basic rate band

Your CGT rate depends on your total taxable income in the year of the sale. The gain is added on top of your other income, so even if you are normally a basic-rate taxpayer, a large property gain may push part of it into the higher rate band.

The annual CGT exempt amount is currently £3,000 per person. This means the first £3,000 of gains in any tax year is tax-free.

Allowable Costs You Can Deduct

You can reduce your chargeable gain by deducting several categories of costs:

• Purchase costs: Stamp Duty Land Tax paid when you bought the property, solicitor's fees, survey costs, and estate agent fees on purchase
• Sale costs: Estate agent commission, solicitor's fees for the sale, and EPC costs if required for the sale
• Improvement costs: Capital expenditure that added value to the property, such as extensions, loft conversions, new kitchens or bathrooms (but not repairs or maintenance, which are revenue expenses deductible against rental income)

The distinction between improvements and repairs is important. Replacing a broken boiler with a similar model is a repair (deductible against rental income). Installing an extension or converting a loft is an improvement (deductible from the capital gain when you sell). Keeping thorough records of all property expenditure in your digital tracking system is essential for maximising your deductions.

The 60-Day Reporting and Payment Rule

Since April 2020, UK residents selling a residential property must report the gain and pay the estimated CGT within 60 days of completion. This is done through HMRC's Capital Gains Tax on UK property service, separate from your annual Self Assessment return.

The 60-day deadline is strictly enforced. Late reports attract a £100 penalty, and late payment incurs interest. You must estimate your CGT liability at the time of reporting, even if you have not yet finalised your Self Assessment for the year. Any over- or under-payment is reconciled through your Self Assessment return.

Strategies to Reduce Your CGT Liability

Use Your Annual Exempt Amount

If you are selling multiple properties, consider selling them in different tax years so that each sale benefits from a separate annual exempt amount. With the allowance at £3,000, this saves £540 to £720 per year depending on your tax rate.

Joint Ownership

If the property is jointly owned with your spouse or civil partner, each person has their own annual exempt amount and basic rate band. A joint sale effectively doubles the tax-free allowance and keeps more of the gain in the lower rate band.

Timing the Sale

If your other income is lower in a particular year (perhaps due to retirement, a career break, or reduced earnings), selling in that year may mean more of the gain falls within the basic rate band, reducing the overall CGT rate.

Claiming All Improvement Costs

Many landlords forget to claim improvement costs because they do not keep adequate records. Every receipt for capital improvements reduces your taxable gain. If you spent £15,000 on a new kitchen ten years ago, that reduces your gain by £15,000. Use LandlordGuru to track all property expenditure so nothing is missed when you come to sell.

Private Residence Relief

If you lived in the property as your main home at any point during ownership, you may qualify for partial Private Residence Relief (PRR). PRR exempts the portion of the gain that relates to the period you lived there, plus an additional final period of ownership (currently nine months). The rules are complex, so seek professional advice if this applies.

Record-Keeping for CGT

You must keep records related to property purchases and sales for at least four years after the CGT reporting deadline. Key documents to retain include:

• Purchase completion statement and solicitor's invoice
• Stamp Duty receipt
• All receipts and invoices for capital improvements
• Sale completion statement, estate agent invoice, and solicitor's invoice
• Any professional valuations obtained

LandlordGuru's document vault provides a secure, organised place to store all these records digitally. When you come to sell, everything you need for the CGT calculation is in one place.

For more on landlord taxation, see our guides on Section 24 mortgage interest relief and Making Tax Digital compliance.