If you sell a residential property that hasn’t always been your main home, there’s a good chance Capital Gains Tax (CGT) could apply.
This often affects:
- Buy-to-let landlords
- Owners of second homes
- Individuals with investment properties
One of the biggest surprises for many taxpayers is that residential property gains follow different reporting rules from most other capital gains.
And importantly, the deadline comes around much faster than many people realise.
When Does Capital Gains Tax Apply?
A chargeable gain can arise when you sell a residential property that:
- Wasn’t your only or main residence throughout ownership
- Has increased in value since you bought it
This could include:
- Rental properties
- Holiday homes
- Second homes
- Properties partly used for business or letting purposes
Depending on your circumstances, some tax reliefs may still be available.
Residential Property Gains Have Different Reporting Rules
Unlike most capital gains, residential property gains usually can’t simply wait until your Self-Assessment tax return.
Instead, HMRC requires UK residential property gains to be:
- Reported separately
- Within 60 days of completion
- With any estimated Capital Gains Tax also paid within the same 60-day period
Missing the deadline can lead to interest charges and penalties.
How Do You Report the Gain?
HMRC has a dedicated online service for reporting residential property gains.
If you sell a UK residential property and make a taxable gain, you’ll need to:
- Create an online Capital Gains Tax account
- Submit details of the disposal
- Pay the estimated Capital Gains Tax due
If the property is jointly owned, each owner must separately report and pay tax on their share of the gain.
What Information Will You Need?
To complete the report, you’ll normally need:
- The property address and postcode
- Date of purchase
- Date contracts were exchanged
- Completion date
- Purchase price
- Sale price
- Legal and estate agent costs
- Improvement costs
- Details of any reliefs or exemptions
Keeping accurate records is extremely important, especially for properties owned over many years.
What If You Can’t Use the Online Service?
If you’re unable to use HMRC’s online system, you can contact HMRC and request a paper form instead.
However, most people now complete the process digitally.
How Much Capital Gains Tax Will You Pay?
The amount of Capital Gains Tax due depends on:
- Your taxable income
- The size of the gain
- Any available losses or reliefs
For 2026/27:
- Gains falling within the basic rate band are taxed at 18%
- Gains above the basic rate band are taxed at 24%
When calculating the gain, you may also be able to deduct:
- Certain buying and selling costs
- Capital improvement costs
- Capital losses
Is the Tax Calculation Final?
Not necessarily.
The payment made within the 60-day window is effectively a best estimate based on the information available at that time.
Your final Capital Gains Tax position is then confirmed through your Self-Assessment tax return after the end of the tax year.
If:
- Further losses arise later in the year
- Additional reliefs become available
…you may be entitled to a refund.
Don’t Miss the 60-Day Deadline
One of the most common issues we see is property sellers simply not realising the reporting deadline exists.
Many people still assume everything is dealt with through their annual tax return — but residential property gains work differently.
Failing to report and pay on time can result in:
- Late filing penalties
- Interest charges
- Additional stress and admin
Need Help Reporting a Property Gain?
Selling a property can already feel complicated without unexpected tax reporting deadlines added into the mix.
At Jon Davies Accountants, we help landlords, investors and property owners across Liverpool and the UK understand their Capital Gains Tax obligations and avoid costly mistakes.
If you’ve sold a residential property or are planning to sell one, get in touch with Jon and the team today for practical, straightforward advice.
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Any questions?
If you’d like a meeting or a video call to discuss this, please get in touch with your favourite Liverpool accountant
- You can ring us on 0151 380 8080
- You can email us at gr****@*********************co.uk