Capital Gains Tax Calculator — Rental Property Sale
This calculator estimates the Capital Gains Tax due when you sell a UK rental property. It covers the annual CGT exempt amount, Private Residence Relief if you lived in the property at any point, and the two residential property CGT rates (18% and 24%) that apply depending on your total taxable income. The result is an estimate. CGT rates and reliefs change, and individual circumstances vary.
How to use this tool
n- Enter the original purchase price and sale price of the property.
- Enter buying and selling costs (stamp duty, legal fees, agent fees).
- Enter any improvement costs, months you lived in the property, total ownership months, and any other capital gains or income. Your estimated CGT liability will appear automatically.
Understanding your results
CGT on residential property uses two rates. Gains falling within your remaining basic rate income tax band are taxed at 18%. Gains above that threshold are taxed at 24%. Your other income determines how much of the basic rate band is available.
The annual exempt amount (£3,000 for 2024/25) is deducted from your gain before tax is calculated. If you have other capital gains in the same year, they consume part of this allowance first.
Private Residence Relief exempts a proportion of the gain based on how long you lived in the property as your main home. The final 9 months of ownership always qualify, regardless of whether you were living there, to allow time to sell. If you lived in the property for the entire ownership period, the full gain is exempt and no CGT is due.
Rates and rules
Capital Gains Tax on UK residential property is charged at 18% (basic rate) and 24% (higher and additional rate) for disposals from 30 October 2024. These rates replaced the former rates of 18% and 28% following the Autumn Budget 2024. Landlords are required to report and pay CGT on UK residential property disposals within 60 days of completion using HMRC’s Capital Gains Tax reporting service. Failure to report within 60 days results in late filing penalties.
Private Residence Relief is available under sections 222 to 226 of the Taxation of Chargeable Gains Act 1992. The final period exemption is currently 9 months (reduced from 18 months in April 2020). Confirm current rates and allowances at gov.uk before making any financial decision.
Related tools: Landlord Income Tax Calculator | Rental Yield Calculator | Stamp Duty Calculator
Legal context
nCapital gains tax applies when you sell a residential property that is not your main home. The annual CGT exempt amount is £3,000 for the 2024/25 tax year. The rate is 18% for basic rate taxpayers and 24% for higher rate taxpayers on residential property gains, following the October 2024 Autumn Budget. Private Residence Relief applies for periods when the property was your main home and automatically covers the final 9 months of ownership.
nFrequently asked questions
What are the CGT rates on UK residential property in 2024/25?
From 30 October 2024, Capital Gains Tax on UK residential property is charged at 18 per cent for gains falling within your remaining basic rate income tax band, and 24 per cent for gains above that threshold. These rates replaced the previous higher rate of 28 per cent following the Autumn Budget 2024. The rate that applies depends on the size of the gain and your other taxable income in the same tax year.
What is the CGT annual exempt amount for 2024/25?
The annual exempt amount for individuals in 2024/25 is £3,000. This is deducted from your total taxable gains before CGT is calculated. If you have gains from other assets in the same year, they reduce this allowance first. The exempt amount has fallen significantly in recent years: it was £12,300 in 2022/23 and was cut to £6,000 in 2023/24 before the further reduction to £3,000.
What is Private Residence Relief and how does it reduce my CGT?
Private Residence Relief (PPR) exempts the portion of your gain that corresponds to the period you lived in the property as your main residence. If you lived there for 60 per cent of your total ownership period, 60 per cent of the gain is exempt. The final 9 months of ownership always qualify for relief, regardless of whether you were in residence during that period, to allow time for the property to sell. If you lived in the property for the entire ownership period, the full gain is exempt and no CGT is due.
Does lettings relief still apply to rental properties?
Lettings relief was significantly restricted from April 2020. It now applies only where the owner lived in the property at the same time as the tenant, i.e. as a lodger arrangement. If you rented the property out while living elsewhere, lettings relief does not apply. For most buy-to-let landlords who have never lived in the property, lettings relief is not available. PPR relief may still apply if you lived in the property before letting it.
How do I calculate the gain on a rental property sale?
The chargeable gain is the sale price minus the original purchase price, minus allowable costs. Allowable costs include solicitor and estate agent fees paid on both purchase and sale, and costs of improvement works (not repairs or maintenance). Mortgage interest and routine repairs cannot be deducted from the capital gain, though they may have been deductible against rental income during the letting period. The annual exempt amount is then deducted from the resulting figure before tax is applied.
What is the 60-day reporting rule?
UK residents who sell a UK residential property and have a CGT liability must report the gain and pay the tax owed within 60 days of completion. This is done through HMRC’s online Capital Gains Tax on UK property service, separate from Self Assessment. If the property is also reported in your Self Assessment return, any over- or under-payment is reconciled at that point. Missing the 60-day deadline results in automatic late filing penalties starting at £100.
Can I deduct improvement costs from my CGT calculation?
Yes, but only capital improvements, not repairs. Improvement costs are expenditure that adds value to the property beyond its original state: an extension, a loft conversion, or a new kitchen where none existed. Repairs and maintenance that restore the property to its original condition, such as repainting, fixing a broken boiler, or replacing worn carpets, are not deductible from the capital gain. Keep receipts and invoices for any improvement work as HMRC may request evidence.
Is indexation allowance still available on rental properties?
No. Indexation allowance, which previously allowed individuals to increase their base cost in line with inflation to reduce the nominal gain, was removed for individuals and trusts in April 1998. It remains available for companies but not for individual landlords. The gain on a property held since before 1998 is calculated using the actual purchase price, not an inflation-adjusted figure. Holdover relief and rollover relief are also not available on disposals of residential let property.
Do non-UK residents pay CGT on UK rental property sales?
Yes. Non-UK residents are subject to CGT on disposals of UK residential property under the Non-Resident Capital Gains Tax (NRCGT) rules, which have applied since April 2015. Non-residents must report the disposal within 60 days of completion regardless of whether a gain arises, and pay any tax owed within the same window. The gain is calculated only on the increase in value since 5 April 2015, unless the non-resident elects to use the full gain from acquisition. The 18 per cent and 24 per cent rates apply in the same way as for UK residents.
Is rollover relief available when selling a buy-to-let property?
No. Rollover relief, which defers a capital gain when the proceeds are reinvested in a qualifying replacement asset, is not available for residential letting property. It applies to assets used in a trade, such as commercial premises, plant, and machinery. A buy-to-let property is an investment asset, not a trading asset, so the gain crystallises on disposal and cannot be rolled into a replacement property. Each sale is a separate chargeable event for CGT purposes.
