How Do I Calculate Capital Gains Tax On Property

Estimate your capital gains tax liability when selling residential or investment property in the UK

How to Calculate Capital Gains Tax on Property: Complete UK Guide (2024)

When you sell a property that’s not your main home (or even if it was at some point), you may need to pay Capital Gains Tax (CGT) on the profit you make. This comprehensive guide explains exactly how to calculate capital gains tax on property in the UK, including all the reliefs and allowances you might be entitled to.

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’s increased in value. For property, this typically applies to:

• Second homes
• Buy-to-let properties
• Inherited properties
• Business premises
• Land

You don’t usually pay CGT when selling your main home, thanks to Private Residence Relief, but there are exceptions we’ll cover later.

How to Calculate Your Capital Gain

The basic calculation for your capital gain is:

Sale proceeds – (Purchase price + Improvement costs + Selling costs) = Capital Gain

Let’s break this down step by step:

1. Determine your sale proceeds: This is normally the sale price of your property, but it could be the market value if you gave the property away or sold it for less than it was worth.
2. Calculate your allowable costs:
   • Purchase price: What you originally paid for the property
   • Improvement costs: Money spent on enhancing the property (not general maintenance). This includes extensions, loft conversions, new kitchens/bathrooms, etc. Keep receipts as proof.
   • Selling costs: Estate agent fees, legal fees, advertising costs, etc.
3. Subtract the allowable costs from the sale proceeds to get your basic gain.

Official HMRC Guidance:

HMRC provides detailed information about what counts as an improvement versus general maintenance. For example, replacing single glazing with double glazing counts as an improvement, but redecorating doesn’t.

GOV.UK: Work out your capital gains when you sell property

Applying Reliefs and Allowances

After calculating your basic gain, you can apply various reliefs and allowances to reduce your taxable gain:

1. Annual Exempt Amount

Every individual has an annual tax-free allowance for capital gains (called the Annual Exempt Amount). For the 2023-2024 tax year, this is:

• £6,000 for individuals
• £3,000 for trustees

Note: This allowance is being reduced from £12,300 in 2022-2023 to £6,000 in 2023-2024, and will be further reduced to £3,000 in 2024-2025.

2. Private Residence Relief

If the property has been your main home at any point, you may qualify for Private Residence Relief (PRR), which can significantly reduce or even eliminate your CGT bill.

The relief covers:

• The time you lived in the property as your main home
• The last 9 months of ownership (regardless of whether you lived there)

The relief is calculated as:

(Period of occupation + final 9 months) / Total period of ownership × Total gain

3. Letting Relief

If you’ve let out part or all of a property that was once your main home, you might qualify for Letting Relief. The rules changed in April 2020, and now Letting Relief is only available if you shared occupancy with the tenant.

The maximum relief is the lower of:

• £40,000
• The amount of Private Residence Relief you’re entitled to
• The gain you made during the letting period

4. Other Reliefs

Depending on your circumstances, you might also qualify for:

• Business Asset Disposal Relief (formerly Entrepreneurs’ Relief) if the property was used for business
• Gift Hold-Over Relief if you gave the property away
• Rollover Relief if you’re reinvesting in another business asset

Capital Gains Tax Rates for Property (2023-2024)

The rate of CGT you pay on property depends on your income tax band:

Income Tax Band	CGT Rate on Property	Taxable Income Range (2023-2024)
Basic rate taxpayer	18%	Up to £50,270
Higher rate taxpayer	28%	£50,271 to £125,140
Additional rate taxpayer	28%	Over £125,140

Important: The rate you pay depends on your total taxable income and gains. You might pay different rates on different portions of your gain if it spans tax bands.

When You Don’t Pay Capital Gains Tax on Property

You normally don’t pay CGT when selling your main home if all these apply:

• You’ve lived in the property as your main home for all the time you’ve owned it
• You haven’t let out part of it (with some exceptions)
• You haven’t used part of it exclusively for business
• The grounds (including all buildings) are less than 5,000 square metres
• You didn’t buy it just to make a gain

Even if you don’t qualify for full relief, you might get partial relief if you’ve lived in the property as your main home for part of the time you owned it.

How to Report and Pay Capital Gains Tax on Property

If you need to pay CGT on property, you must:

1. Report the gain to HMRC within:
   • 60 days if you’re a UK resident selling UK property
   • The Self Assessment tax return deadline (31 January) if you’re selling other assets or are non-resident
2. Pay the tax within the same deadline as reporting

For UK residents selling residential property, you must report and pay any CGT due using HMRC’s real time Capital Gains Tax service within 60 days of completion. You’ll need a Government Gateway account.

Important HMRC Deadlines:

The 60-day reporting and payment deadline was introduced in April 2020. Missing this deadline can result in penalties and interest charges.

GOV.UK: Report and pay Capital Gains Tax

Common Mistakes to Avoid

Many property sellers make costly mistakes when calculating their CGT. Here are the most common pitfalls:

• Forgetting to include all improvement costs: Many people miss out on legitimate deductions by not keeping proper records of home improvements.
• Incorrectly calculating Private Residence Relief: The rules about what counts as your “period of occupation” can be complex, especially if you’ve been away for work or lived elsewhere temporarily.
• Missing the 60-day deadline: This is a common and expensive mistake that can lead to penalties.
• Not considering the annual exempt amount: Even if your gain is small, you might not need to pay any tax if it’s within your annual allowance.
• Assuming all letting periods qualify for Letting Relief: The rules changed in 2020, and now relief is only available in specific circumstances.

Capital Gains Tax on Inherited Property

If you inherit a property and later sell it, you’ll need to calculate the gain based on the property’s value at the time of inheritance (not when the original owner bought it).

The process is:

1. Get a professional valuation of the property at the date of death
2. Use this valuation as your “purchase price” for CGT purposes
3. Calculate the gain when you sell based on this valuation

If you lived in the inherited property as your main home before selling, you might qualify for Private Residence Relief for the period you lived there.

Capital Gains Tax for Non-UK Residents

If you’re non-UK resident and sell UK property, you’ll need to:

• Report the sale to HMRC within 60 days of completion, regardless of whether there’s a gain
• Pay any CGT due within the same 60-day period

The rules are complex, and you might be eligible for some reliefs depending on your circumstances and any double taxation agreements between the UK and your country of residence.

How to Reduce Your Capital Gains Tax Bill

There are several legitimate ways to reduce your CGT liability:

1. Use your annual exempt amount: If you have other assets to sell, consider timing the sales to use multiple years’ allowances.
2. Transfer assets to your spouse/civil partner: You can transfer assets between spouses without triggering CGT, potentially using both of your annual allowances.
3. Time your sale carefully: If you’re close to the end of a tax year, delaying the sale by a few weeks could give you another year’s allowance.
4. Consider gift hold-over relief: If you’re gifting a property to someone (not your spouse), this relief allows you to defer the CGT until they sell it.
5. Invest in an EIS or SEIS: Investments in certain small companies can provide CGT reliefs.
6. Offset losses: If you’ve made capital losses in the same tax year, you can offset these against your gains.

Capital Gains Tax vs. Income Tax on Property

It’s important to understand the difference between CGT and income tax when it comes to property:

Aspect	Capital Gains Tax	Income Tax
What it taxes	Profit from selling an asset	Rental income or other revenue
When it applies to property	When you sell a property that’s increased in value	On rental income, or if you’re a property trader (buying and selling properties as a business)
Rates (2023-2024)	18% or 28% (depending on income)	20%, 40% or 45% (depending on income)
Allowances	£6,000 annual exempt amount	£1,000 property allowance for rental income
Payment deadline	60 days for UK property (or via Self Assessment)	Via Self Assessment (31 January)

If you’re a property investor, you might need to pay both income tax on rental profits and CGT when you sell the property.

Case Study: Calculating CGT on a Buy-to-Let Property

Let’s work through a realistic example to see how the calculation works in practice.

Scenario: Sarah bought a flat in 2015 for £200,000. She lived in it as her main home for 2 years, then rented it out for 5 years before selling it in 2023 for £350,000. She spent £15,000 on a new kitchen and bathroom, and her selling costs were £3,000. Sarah earns £45,000 per year from her job.

Step 1: Calculate the basic gain

Sale price: £350,000
Purchase price: £200,000
Improvement costs: £15,000
Selling costs: £3,000

Basic gain = £350,000 – (£200,000 + £15,000 + £3,000) = £132,000

Step 2: Apply Private Residence Relief

Total ownership period: 8 years (2 years living there + 6 years renting)
Period eligible for PRR: 2 years (living there) + 9 months (final period) = 2.75 years

PRR = (2.75 / 8) × £132,000 = £45,562.50

Step 3: Check for Letting Relief

Since Sarah didn’t share occupancy with her tenants during the letting period, she doesn’t qualify for Letting Relief under the current rules.

Step 4: Calculate taxable gain

Taxable gain = Basic gain – PRR – Annual Exempt Amount
= £132,000 – £45,562.50 – £6,000 = £80,437.50

Step 5: Determine CGT rate

Sarah’s income is £45,000. The basic rate band is £50,270, so she has £5,270 of basic rate band remaining.

£5,270 of her gain will be taxed at 18%, and the remaining £75,167.50 at 28%.

Step 6: Calculate final CGT bill

(£5,270 × 18%) + (£75,167.50 × 28%) = £948.60 + £21,046.90 = £21,995.50

So Sarah would need to pay approximately £21,996 in Capital Gains Tax.

Frequently Asked Questions

Do I pay Capital Gains Tax when I sell my main home?

Usually not, thanks to Private Residence Relief. However, there are exceptions:

• If you’ve let out part of your home
• If you’ve used part of your home exclusively for business
• If the grounds (including all buildings) are more than 5,000 square metres
• If you bought the property just to make a gain

How do I prove improvement costs to HMRC?

You should keep:

• Invoices and receipts for all work done
• Bank statements showing payments
• Contracts with builders or architects
• Before and after photos (helpful but not essential)

HMRC can ask for evidence, so it’s important to keep good records for at least 5 years after the 31 January following the tax year when you sold the property.

What if I made a loss on my property?

If you sell a property for less than you paid for it (after accounting for costs), you’ve made a capital loss. You can use this loss to reduce gains you’ve made on other assets in the same tax year or in future years. You must claim the loss within 4 years of the end of the tax year in which you disposed of the asset.

Do I pay Capital Gains Tax if I give a property to my child?

Yes, HMRC treats this as a disposal at market value, so you’ll need to calculate the gain based on the property’s value at the time of the gift. However, you might be able to use gift hold-over relief to defer the tax until your child sells the property.

What if I’m separated or divorced?

Special rules apply when transferring property between separated or divorced couples. Transfers in the tax year of separation are usually tax-free, and you might be able to claim Private Residence Relief for properties you’ve moved out of but your ex-partner still lives in.

Expert Resources:

The Chartered Institute of Taxation provides excellent guidance on property taxation, including complex scenarios like transfers between spouses and civil partners.

Chartered Institute of Taxation

Final Thoughts and Next Steps

Calculating Capital Gains Tax on property can be complex, especially when dealing with reliefs, partial exemptions, and changing rules. Here’s what to do next:

1. Gather your records: Collect all documents related to the purchase, improvements, and sale of your property.
2. Use our calculator (above) to get an estimate of your potential liability.
3. Consider professional advice: If your situation is complex (e.g., you’ve lived in the property for part of the time, or it’s been inherited), it’s worth consulting a tax advisor.
4. Report and pay on time: Remember the 60-day deadline for UK property sales to avoid penalties.
5. Plan ahead: If you’re considering selling a property, think about the timing to make the most of your annual exempt amount and any available reliefs.

While CGT might seem daunting, understanding the rules can help you legitimately reduce your tax bill and avoid costly mistakes. The key is to keep good records, understand what reliefs you’re entitled to, and meet all the reporting deadlines.