You Sold a UK Property. Now What?

You completed the sale of your UK rental flat last Tuesday. The money landed in your Dubai bank account. You feel relieved. One less thing to manage from 3,500 miles away.

Here is the thing most non-resident sellers do not realise: you have 60 calendar days from the date of completion to report the sale to HMRC and pay any Capital Gains Tax (CGT) due. Not 61. Not "before the next self-assessment deadline." 60 days.

Miss it and HMRC charges you a penalty. The clock starts ticking the moment the buyer's solicitor transfers the funds. Most agency founders I meet in Dubai, Abu Dhabi, and across Europe find this out the hard way when a penalty letter arrives.

This article explains exactly how the 60-day reporting rule works, who it applies to, what happens if you miss it, and how to avoid the mistakes that cost expat property sellers thousands in avoidable penalties.

Who Does the 60-Day Reporting Rule Apply To?

The rule applies to anyone who is non-resident for UK tax purposes when they dispose of a UK residential property. "Non-resident" means you spend fewer than 183 days in the UK in a tax year, or you have left the UK and are treated as non-resident under the Statutory Residence Test.

If you live in the UAE, Saudi Arabia, Qatar, Singapore, or anywhere else outside the UK, and you sell a UK property, you are caught by this rule. There is no turnover threshold. No exemption for small gains. If you sell, you report.

There is one exception: if the property was your main home and you qualify for Private Residence Relief, you may not owe any CGT. But you still need to report the sale within 60 days to confirm no tax is due. HMRC does not assume you qualify. You must tell them.

What Counts as a "Residential Property" for This Rule?

HMRC defines residential property broadly. It includes houses, flats, apartments, and any building used or suitable for use as a dwelling. It also includes the land attached, up to 0.5 hectares (roughly 1.24 acres).

Commercial property sales by non-residents follow different rules. The 60-day deadline applies to residential property only. If you sell a mixed-use building (a shop with a flat above), the residential element triggers the reporting obligation.

What Triggers the 60-Day Clock?

The clock starts on the "date of disposal." For property, this is the date contracts are exchanged, not the date you receive the money. In most cases, exchange and completion happen on the same day for residential sales. But if they do not, the date of exchange is the trigger.

Here is where it gets specific. You must file a Non-Resident Capital Gains Tax (NRCGT) return within 60 days of that date. This is not a section of your annual self-assessment. It is a standalone return with its own form and its own payment deadline.

You file it through HMRC's online service. You pay the estimated tax at the same time. HMRC then reconciles the figures when you file your self-assessment for the year. Any overpayment gets refunded. Any underpayment gets charged.

How Is the Tax Calculated for a Non-Resident?

Non-residents pay CGT on the gain made since 6 April 2015 (the date the rules were introduced for non-residents). If you owned the property before that date, you only pay tax on the gain that accrued from 6 April 2015 onwards.

You can choose to use the "straight-line" method (apportioning the gain evenly over the ownership period) or the "actual" method (using a valuation at 5 April 2015). The actual method often produces a lower gain, but it requires a professional valuation from that date. You need evidence.

The CGT rates for non-residents are the same as for UK residents:

  • 18% if your total UK income and gains fall within the basic rate band (£12,571 to £50,270)
  • 24% if they fall within the higher rate band (above £50,270)

You also have your annual CGT allowance. For 2025/26, that is £3,000. If your gain is below £3,000, you owe no tax. But you still need to report the disposal within 60 days if you are non-resident. The allowance is not a reporting exemption.

Worked Example: A Dubai-Based Agency Founder

Let me give you a real-world scenario. A digital agency founder I work with moved from Manchester to Dubai in 2021. He kept a flat in Soho that he rented out. He sold it in June 2025 for £475,000. He bought it in 2018 for £350,000. His total gain was £125,000.

He had no other UK income in 2025/26. His personal allowance (£12,570) and CGT allowance (£3,000) reduced the taxable gain to £109,430. The first £37,700 of that fell within the basic rate band (18% CGT = £6,786). The remaining £71,730 fell into the higher rate band (24% CGT = £17,215). Total CGT due: £24,001.

He had to file the NRCGT return and pay that £24,001 within 60 days of completion. He did not. He assumed it would be handled through his self-assessment. The penalty for late filing started at £100, then £10 per day after three months, then more. By the time he called us, the penalties and interest had added £1,800 to his bill.

What Happens If You Miss the 60-Day Deadline?

HMRC does not send reminders. They do not send a "friendly nudge" when day 55 passes. They simply apply penalties when the return is late.

The penalty structure is:

  • Immediate £100 fixed penalty for filing late, even by one day
  • After 3 months, an additional £10 per day (capped at 90 days = £900)
  • After 6 months, the greater of 5% of the tax due or £300
  • After 12 months, another 5% of the tax due or £300

Interest also accrues on unpaid tax from the original 60-day deadline. The current HMRC interest rate on late payments is 7.25% (as of Q1 2025). That compounds.

For the founder in my example, the £1,800 in penalties and interest could have been avoided entirely with a 45-minute online filing and a same-day bank transfer.

How Do You File the NRCGT Return?

You file online through HMRC's Government Gateway. You need to register for the service first if you have not used it before. That registration can take up to 10 working days. Do not leave it until day 55.

You will need:

  • Completion statement from the solicitor
  • Purchase price and date
  • Valuation at 5 April 2015 (if using the actual method)
  • Costs of acquisition and disposal (solicitor fees, estate agent fees, SDLT)
  • Improvement costs (capital expenditure, not repairs)
  • Details of any Private Residence Relief or Lettings Relief claims

The system calculates the gain and the tax due. You pay by debit card, credit card (with a fee), or bank transfer (Faster Payments or CHAPS). Do not use a personal credit card if you can avoid it. The fee adds up.

Common Mistakes Agency Founders Make

I see the same errors repeatedly with non-resident property sellers. Here are the three biggest ones.

Mistake 1: Assuming Self-Assessment Covers It

The most common error. Non-residents assume they can report the sale on their annual self-assessment return and pay the tax by 31 January. That is wrong. The 60-day rule is separate and mandatory. You file the NRCGT return within 60 days, then reconcile on your self-assessment later. If you only file on self-assessment, you miss the 60-day deadline and incur penalties.

Mistake 2: Forgetting the Annual Exempt Amount

Some people overpay because they do not apply their £3,000 CGT allowance in the NRCGT return. The online system asks you to enter it. Use it. It reduces your tax bill by up to £720 (at 24%).

Mistake 3: Not Keeping Records of Improvements

Capital improvements increase your cost base and reduce your gain. A new kitchen, a loft conversion, a new boiler, these are not repairs, they are improvements. Without receipts and dated invoices, HMRC will not accept them. Keep paper and digital copies.

What If You Sold Before 6 April 2025?

The 60-day rule has been in place since 6 April 2015 for non-residents selling UK residential property. If you sold in 2024/25, the same rule applied. The rates were slightly different (18% and 24% for higher rate, with the old 10% and 20% rates applying before 30 October 2024). But the deadline was the same. If you missed it for a previous sale, you can still file late. Penalties will apply, but filing now stops them from escalating.

Do You Need an Agent or Solicitor to Handle This?

You can file the NRCGT return yourself. The HMRC online system is reasonably straightforward for a single property sale. But if you have multiple properties, a complex ownership structure (joint ownership, trust, company), or you are unsure about the valuation at 5 April 2015, you should get professional help.

As ICAEW qualified accountants working with agency founders across the UAE and UK, we handle NRCGT filings regularly. The cost of professional advice is usually far less than the penalties for getting it wrong.

What About Future Sales?

If you are planning to sell a UK property in the next 12 months, do this now:

  • Get a valuation as of 5 April 2025 (the start of the current tax year)
  • Dig out receipts for any capital improvements
  • Register for HMRC's online service if you have not already
  • Talk to your accountant before you instruct the solicitor

Property sales by non-residents are not complicated. But the 60-day deadline is unforgiving. Plan for it before the completion date, not after.

If you need help with a UK property sale, a self-assessment filing, or your wider UK tax position as a non-resident, get in touch with our team. We work with agency founders in Dubai, Abu Dhabi, and across the world.