Non-residents selling UK residential property must pay UK capital gains tax on any increase in value since acquisition, a rule that has applied to all non-resident sellers since April 2015 for gains on residential property and since April 2019 for commercial and mixed-use property. The gain must generally be reported to HMRC and any tax paid within 60 days of completion.
Why This Rule Exists
Before April 2015, non-residents selling UK residential property paid no UK capital gains tax at all, an exemption that made the UK unusually attractive for overseas investors compared with most other major property markets. That exemption was removed to bring non-resident sellers broadly in line with UK resident sellers, though the mechanics of how the gain is calculated still differ in ways that matter for anyone planning a future sale.
How the Taxable Gain Is Calculated
For most non-resident sellers, the taxable gain is based on the increase in value from a specific rebasing date rather than from the original purchase price. For residential property, the relevant rebasing date is generally 5 April 2015. This means a non-resident who bought a London flat in 2005 and sells it today is typically taxed only on the growth in value since April 2015, not on the full gain since the original 2005 purchase, which can significantly reduce the taxable amount for long term owners.
An independent valuation as at the rebasing date is essential to support this calculation, and it is worth commissioning one from a RICS qualified valuer well before a planned sale rather than trying to reconstruct historic values afterwards.
Current Rates for Non-Resident Individuals
Non-resident individuals pay capital gains tax on UK residential property at rates that mirror those paid by UK residents, with the applicable rate depending on the seller’s total UK income and gains for the year. Companies are generally subject to corporation tax on the gain instead, at a different rate, which is one of several reasons ownership structure should be considered carefully at the point of purchase, not just at the point of sale.
The 60 Day Reporting Deadline
A UK property tax return reporting the gain must generally be filed, and any tax due paid, within 60 days of the completion date. This deadline applies regardless of whether the seller also completes a full self assessment tax return later in the year, and it applies even if the sale resulted in a loss, since a return may still be required. Missing this window can trigger penalties, so sellers should involve an accountant before completion rather than after.
What Counts as UK Residential Property
The rules cover most UK residential property, including houses, flats, and in many cases land with permission for residential development. They apply whether the property was a rental investment, a second home, or a former main residence, though relief may be available for periods when the property was the seller’s only or main home, calculated on a time apportioned basis.
How This Interacts with Other Property Taxes
Capital gains tax on sale is only one part of the tax picture for a non-resident owner. Buyers should also understand stamp duty costs at the point of purchase and, where the property is held through a company, ATED costs during ownership. Looking at purchase, holding and eventual sale together, rather than in isolation, gives a far more accurate picture of the true lifetime cost of owning UK property as a non-resident. For the practical steps involved in the sale itself, separate from the tax calculation, our guide to selling UK property as a non-resident covers documents, remote signing, and moving proceeds internationally.
Planning Considerations Before a Sale
- Commission a rebasing valuation early if you do not already have one, ideally from a RICS qualified valuer with experience of historic date-specific valuations
- Keep records of any capital improvements, such as extensions or major renovations, since these can typically be deducted from the gain
- Confirm your residency status for the relevant tax year, since UK residency rules are based on detailed day-count tests that can shift the calculation
- Engage an accountant before completion, not after, given the tight 60 day reporting window
Frequently Asked Questions
Do non-residents pay capital gains tax on UK property?
Yes. Since April 2015 for residential property, non-residents have been liable for UK capital gains tax on the increase in value from the relevant rebasing date to the date of sale.
How is the taxable gain calculated for a long term owner?
For most non-resident sellers, the gain is calculated from a specific rebasing date, generally April 2015 for residential property, rather than from the original purchase date, which can substantially reduce the taxable gain for owners who bought before that date.
How quickly must the gain be reported to HMRC?
A UK property tax return must generally be filed and any tax paid within 60 days of the completion date, a considerably tighter deadline than the standard self assessment timeline.
Do companies pay capital gains tax the same way as individuals?
No. Non-resident companies are generally subject to corporation tax on UK property gains rather than capital gains tax, at different rates and under different rules, so ownership structure affects the calculation.
Is relief available if the property was once my main home?
Relief may be available for the period the property was genuinely your only or main residence, calculated on a time apportioned basis, though the specific rules depend on your individual circumstances and should be confirmed with an accountant.
Written and reviewed by the My Luxury Property editorial team, who research premium property markets and ownership costs across the UK and internationally. This article is for general information only and is not tax advice; see our disclaimer for details. Figures and deadlines should always be confirmed with a qualified accountant. Have a question about a planned sale? Get in touch with us here.