Capital Gains Tax (CGT) Property Calculator
Calculate your potential CGT liability when selling a property in the UK. This tool provides estimates based on current tax rules.
Comprehensive Guide: How to Calculate Capital Gains Tax (CGT) on Property in 2024
Capital Gains Tax (CGT) on property can be complex, but understanding how to calculate it properly can save you thousands of pounds. This expert guide explains everything you need to know about CGT on property sales in the UK, including how to calculate your liability, available reliefs, and strategies to minimise your tax bill.
What is Capital Gains Tax on Property?
Capital Gains Tax is a tax on the profit you make when you sell (or ‘dispose of’) an asset that has increased in value. For property, this typically applies when you sell:
- Buy-to-let properties
- Business premises
- Land
- Inherited property (that isn’t your main home)
- Second homes or holiday homes
You don’t usually pay CGT when selling your main home, thanks to Private Residence Relief, though there are exceptions if you’ve let out part of your home or used it for business.
How to Calculate CGT on Property: Step-by-Step
-
Determine your gain
Calculate the difference between what you paid for the property (including acquisition costs) and what you sold it for (minus selling costs).Gain = Sale Price – (Purchase Price + Improvement Costs + Selling Costs) -
Apply any available reliefs
The most common is Private Residence Relief if the property was your main home for some or all of the ownership period. Other reliefs include:- Letting Relief (if you let out your home)
- Business Asset Disposal Relief (for business properties)
-
Deduct your annual exempt amount
For 2023-24, this is £6,000 (reduced from £12,300 in previous years). This is the amount of gain you can make each year without paying CGT. -
Calculate your taxable gain
Subtract your annual exempt amount and any reliefs from your total gain. -
Apply the appropriate CGT rates
The rate depends on your income tax band and the type of asset:- Basic rate taxpayers: 18% on residential property gains (10% for other assets)
- Higher/additional rate taxpayers: 28% on residential property gains (20% for other assets)
CGT Rates for Property in 2023-24
| Taxpayer Type | Residential Property Rate | Other Assets Rate | Annual Exempt Amount |
|---|---|---|---|
| Basic Rate | 18% | 10% | £6,000 |
| Higher Rate | 28% | 20% | £6,000 |
| Additional Rate | 28% | 20% | £6,000 |
Key Reliefs That Can Reduce Your CGT Bill
The most valuable relief, PRR can completely eliminate CGT if the property was your main home for the entire period you owned it. Even if you only lived there for part of the time, you may get partial relief.
Final period exemption: Even if you’ve moved out, the last 9 months of ownership (reduced from 18 months in 2020) are automatically treated as if you lived there.
Example: If you owned a property for 10 years but only lived in it for 6 years, you would get relief for 6 years + 9 months = 6.75 years out of 10.
If you let out a property that was once your main home, you may qualify for Letting Relief of up to £40,000 (or £80,000 for couples). However, since April 2020, this relief is only available if you shared occupancy with your tenant.
If you’re selling a business property (like a rental business), you might qualify for this relief, which reduces the CGT rate to 10% on the first £1 million of gains over your lifetime.
What Costs Can You Deduct When Calculating CGT?
You can deduct certain costs from your gain to reduce your taxable amount:
| Cost Type | Deductible? | Notes |
|---|---|---|
| Purchase price | Yes | The amount you originally paid for the property |
| Stamp Duty Land Tax | Yes | Paid when you bought the property |
| Legal fees (purchase) | Yes | Solicitor/conveyancing costs when buying |
| Survey costs | Yes | Building survey or valuation reports |
| Improvement costs | Yes | Extensions, conversions, or major renovations (not repairs) |
| Estate agent fees | Yes | Commission paid when selling |
| Legal fees (sale) | Yes | Solicitor/conveyancing costs when selling |
| Repair costs | No | General maintenance doesn’t count as improvements |
Common Mistakes to Avoid When Calculating CGT
- Forgetting to include all costs: Many people only consider the purchase and sale price, missing out on deductible expenses like legal fees and improvement costs.
- Incorrectly calculating ownership periods: The date you exchanged contracts (not completion) is what matters for CGT calculations.
- Not using the annual exempt amount: Everyone gets an annual CGT allowance – make sure you use it.
- Ignoring the 60-day rule: Since April 2020, you must report and pay CGT on residential property within 60 days of completion (reduced from 30 days in 2022).
- Assuming all property sales are taxable: Your main home is usually exempt, and other reliefs may apply.
How to Report and Pay CGT on Property
If you need to pay CGT on property, you must:
- Calculate your gain using the method described above
- Report the gain to HMRC within 60 days of completing the sale (for residential property)
- Pay the tax owed within the same 60-day period
- Include the gain on your Self Assessment tax return if you complete one
You can report and pay using HMRC’s Capital Gains Tax on UK property service.
Strategies to Legally Reduce Your CGT Bill
There are several legitimate ways to minimise your CGT liability:
- Use your annual exempt amount: Time sales to use your £6,000 allowance each tax year.
- Transfer assets to your spouse: Couples can use both their annual exempt amounts by transferring assets between them.
- Offset losses: Capital losses can be offset against gains in the same or future tax years.
- Consider timing: If you have gains close to the tax band threshold, you might pay less by realising them in different tax years.
- Invest in EIS or SEIS: Investments in certain startups can provide CGT relief.
- Use a limited company: For property investors, holding properties in a company may be more tax-efficient (though has other implications).
Recent Changes to CGT on Property
The UK government has made several significant changes to CGT rules in recent years:
- April 2020: Introduction of the 30-day reporting and payment window for residential property (later extended to 60 days)
- April 2020: Restriction of Letting Relief to only apply when the owner shares occupancy with the tenant
- April 2020: Reduction of the final period exemption from 18 months to 9 months
- April 2023: Reduction of the annual exempt amount from £12,300 to £6,000
- April 2024: Further reduction of the annual exempt amount to £3,000
Frequently Asked Questions About CGT on Property
Yes, gifting a property (other than to your spouse) is treated as a disposal at market value, so CGT may be due. There are special rules for gifts to charities and some other organisations.
When you inherit a property, you’re treated as acquiring it at its market value at the date of death (not what the original owner paid). This can sometimes reduce CGT liability.
Non-UK residents pay CGT on UK property at different rates (18% or 28% for residential property). You must report sales within 60 days regardless of whether tax is due.
Unlike some countries, the UK doesn’t have a “rollover relief” for residential property. However, Business Asset Roll-over Relief may apply to certain business properties.
When to Seek Professional Advice
While this guide covers the fundamentals, CGT calculations can become complex, especially when:
- You’ve owned the property for many years
- The property was partially your main home
- You have significant other gains or losses
- You’re non-UK resident
- The property was inherited
- You’re considering using a company structure
In these cases, consulting with a tax advisor or accountant specialising in property tax can help ensure you’re calculating your liability correctly and taking advantage of all available reliefs.
Additional Resources
For official guidance, consult these authoritative sources: