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Foreign investorsCosts and tax

Capital gains when a non-resident sells

The City of London from Waterloo Bridge · photograph by David Iliff, Wikimedia Commons, CC BY-SA 3.0

Selling a UK property can trigger a tax bill, even if you're not living here. A short deadline for reporting the disposal catches many sellers out, and the gain is not just the difference between sale and purchase prices.

Unreviewed draft. Written by llama-4-scout-17b-16e-instruct on 2026-09-10 and not yet checked by an editor. Every rate and duty below is maintained by hand against GOV.UK and is not written by the model.

What happens when you sell

When you sell a UK residential property, you'll need to report the disposal to HMRC and pay any tax due. The process can be complex, and many sellers are caught out by a short deadline for reporting the disposal. This deadline is often missed, leading to additional costs.

The disposal must be reported, even if you think you won't owe any tax. The rules apply to non-residents who sell UK residential property, and there are specific steps to follow.

Calculating the gain

The gain is not simply the difference between the sale price and the purchase price. You may have made improvements to the property, and these can be factored into the calculation. You may also have sold other assets, such as fixtures or fittings, which can affect the gain.

The calculation can be complex, and it's essential to understand what costs can be included. A professional can help you determine the gain and ensure you're taking advantage of all available allowances.

Reporting the disposal

The reporting duty on disposal must be met within a short timeframe. If you miss this deadline, you may face additional costs. The report must include details of the sale, including the sale price and any costs associated with the sale.

You'll need to keep records of the sale, including the contract and any related documents. These records will help you complete the report and ensure you're meeting the necessary requirements.

Before you commit

  • Check if you need to report the disposal to HMRC and pay any tax due.
  • Ensure you understand how to calculate the gain and what costs can be included.
  • Consider seeking professional advice to ensure you're meeting all the necessary requirements.

Work out your own numbers

The stamp duty calculator applies the non-resident addition alongside the ordinary rates for every UK nation. The purchase cost planner takes it further, into cash required and monthly commitments.

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Information, not advice. Version 3, last updated 2026-09-10. Nothing here is tax, legal, mortgage or investment advice, and rules differ between England, Wales, Scotland and Northern Ireland.