If you are a UK agency founder living in Dubai and you own a UK property, the question of capital gains tax when you sell is not optional. It is a legal obligation with a tight deadline that catches many people out.
The short answer is yes. You pay UK capital gains tax on a UK property when you sell it, even if you live in Dubai. The rate you pay, the reliefs you can claim, and the reporting deadline all depend on your specific circumstances. But the one thing that is non-negotiable is the 60-day reporting window from the date of completion.
This article covers exactly how UK capital gains tax selling property from Dubai works, what the deadlines are, and what you should do before you exchange contracts.
Do Non-Residents Pay UK Capital Gains Tax on Property?
Yes. Since 6 April 2015, non-UK residents have been liable for UK capital gains tax (CGT) on disposals of UK residential property. Before that date, if you were non-resident, you could sell a UK property and pay no UK CGT. That changed, and the rules have tightened further since.
From 6 April 2020, the scope expanded to include non-residential property too. But for most agency founders, the relevant asset is a residential property: your former home, a buy-to-let, or a property you held as an investment.
If you are a UK agency founder living in Dubai, you are treated as non-resident for UK tax purposes provided you spend fewer than 183 days in the UK in a tax year and meet other conditions (such as having your only home in the UAE). As a non-resident, you are within the charge to UK CGT on UK property.
What Rate of CGT Do You Pay as a Non-Resident?
The rate depends on your total UK income and gains for the tax year. As a non-resident, you are entitled to the same annual exempt amount as UK residents. For 2025/26, that is £3,000. Gains above that are taxed at:
- 18% on gains that fall within your basic rate band (£0 to £50,270 of taxable income plus gains)
- 24% on gains above that
If you have no other UK income, the first £50,270 of gains (after the £3,000 allowance) are taxed at 18%. Anything above that is taxed at 24%. If you do have UK income, say from a rental property or director's fees, your basic rate band is reduced accordingly.
Compare that to the old rates. Before 30 October 2024, non-residents paid 10% and 20% respectively. The Autumn 2024 Budget increased those rates to 18% and 24% for all property disposals, including by non-residents.
Let us run a real example. You sell a UK property and make a gain of £150,000. You have no other UK income. Your CGT calculation looks like this:
- Annual exempt amount: £3,000
- Chargeable gain: £147,000
- First £50,270 at 18%: £9,048.60
- Remaining £96,730 at 24%: £23,215.20
- Total CGT due: £32,263.80
That is a significant tax bill. And you must pay it within 60 days of completion.
The 60-Day Reporting and Payment Window
This is the rule that catches most agency founders off guard. When you sell a UK property as a non-resident, you must report the disposal and pay the CGT within 60 calendar days of the completion date. Not the exchange date. The completion date.
You report through HMRC's non-resident CGT (NRCGT) service. You can do this online via your Government Gateway account. You do not need to wait until the end of the tax year and you cannot file it as part of your self-assessment return (unless you also file a UK tax return, in which case you still must report within 60 days and then adjust on the return).
The 60-day window is tight. If you are in Dubai and your solicitor is in London, you need to coordinate the reporting before you go on holiday or get distracted by client work. Missing the deadline triggers penalties: £100 for the first day, then daily penalties of £10 for up to 90 days, plus interest on the unpaid tax.
If you are a founder running a 12-person digital agency billing £800k per year, you have enough on your plate without HMRC penalty letters arriving in your inbox. Get the reporting done before you book that flight back to Dubai.
What If the Property Was Your Main Home?
Private residence relief (PRR) can eliminate the CGT charge entirely if the property was your main home at some point and you meet the conditions. But the rules for non-residents are more restrictive than they used to be.
If you lived in the property as your main home and then moved to Dubai, you get PRR for the period you lived there plus the final 9 months of ownership (the "deemed occupation" period). Any gain relating to periods when you were non-resident and not living in the property is potentially taxable.
However, there is an important relief for non-residents who sell a property that was their main home at some point. If you are non-resident for the entire period of ownership after 5 April 2015, you can still claim PRR for the period you actually lived there, plus the final 9 months. But any gain arising after you left the UK is apportioned and taxed.
Example: You bought a flat in Shoreditch in 2010, lived there until 2018, then moved to Dubai. You sell the flat in 2025. The total gain is £200,000. The property was your main home for 8 of the 15 years you owned it. PRR covers 8 years plus 9 months (the final deemed occupation). That is roughly 58% of the gain covered. The remaining 42% (£84,000) is chargeable, subject to the £3,000 allowance.
This is a complex area. If the property was your main home at any point, speak to your accountant before you list it.
What About Letting Relief?
Letting relief used to be available if you let out a property that was previously your main home. It was abolished for disposals from 6 April 2020. If you are selling a property that was your main home and then rented out, you get no letting relief. Only PRR applies, and only for the periods you actually lived there plus the final 9 months.
Can You Avoid CGT by Staying Non-Resident?
No. The charge applies regardless of your residency status. Even if you never return to the UK, the gain on a UK property is taxable in the UK. The UK has a statutory right to tax gains on UK land, and that overrides any double tax treaty provisions.
The UK-UAE double tax treaty does not give the UAE exclusive taxing rights over UK property gains. The UK retains the right to tax them. So moving to Dubai does not exempt you. It just changes the reporting process and the rate.
Some founders ask whether they can avoid CGT by selling before they move. That is a different question. If you sell while you are still UK resident, you pay CGT at UK resident rates (18%/24% on property, but with the full annual exempt amount). If you sell after becoming non-resident, you pay at the same rates but with the 60-day reporting obligation. Either way, the tax is due.
What Costs Can You Deduct From the Gain?
When calculating your gain, you can deduct certain costs to reduce the CGT bill. These include:
- The original purchase price
- Stamp duty and legal fees on purchase
- Estate agent fees and legal fees on sale
- Costs of capital improvements (not routine repairs)
- Incidental costs of acquisition and disposal
You cannot deduct mortgage interest, insurance, or general maintenance costs. Those are revenue expenses, not capital costs.
Keep all your records. If you bought the property in 2012 and have no paperwork, you may struggle to evidence the base cost. HMRC will accept a reasonable estimate, but they can challenge it. If you are unsure, ask your accountant to reconstruct the figures from Land Registry records and bank statements.
What If You Own the Property Through a Company?
If you hold UK property through a company (a common structure for buy-to-let portfolios), the rules are different. The company pays corporation tax on the gain at 19% or 25%, not CGT. And the company itself is the taxpayer, not you personally.
But if you are a non-resident company, the same 60-day reporting requirement applies. The company must report the disposal to HMRC within 60 days of completion and pay the corporation tax due.
If you then extract the proceeds from the company as a dividend, you pay dividend tax in the UK at your marginal rate (8.75%, 33.75%, or 39.35% depending on your total income). Or if you are non-resident, you may be able to avoid UK dividend tax by receiving the dividend while non-resident, depending on the treaty. But the company itself cannot avoid the tax on the gain.
This is a specialist area. If you hold property through a company, speak to an accountant who understands both UK property tax and non-resident structures.
What Happens If You Sell at a Loss?
If you sell a UK property at a loss while non-resident, you can report the loss to HMRC. You can carry it forward to offset against future UK property gains. But you cannot offset it against general income or other capital gains (like shares) unless you are UK resident.
Losses must be reported within 4 years of the end of the tax year in which the disposal occurred. If you do not report them, you lose the ability to use them later.
Practical Steps Before You Sell
If you are a UK agency founder living in Dubai and you plan to sell a UK property, here is what to do:
- Get a valuation. If you have owned the property for a long time, get a professional valuation at the date you became non-resident (if that was after 5 April 2015). This establishes the base cost for the non-resident period.
- Check PRR eligibility. If the property was your main home, calculate the exempt and chargeable periods. Your accountant can do this.
- Set aside funds for the tax. If you expect a gain, put the CGT aside from the sale proceeds. Do not assume you can pay later. You have 60 days.
- Coordinate with your solicitor. Tell your conveyancing solicitor that you are non-resident. They need to know because the Stamp Duty Land Tax (SDLT) surcharge for non-residents (2%) may apply if you are buying another property. But for the sale, they just need to know you have a CGT obligation.
- File the NRCGT return. Do this within 60 days of completion. Your accountant can handle this, but you need to give them the completion statement promptly.
- Review your overall UK tax position. If you have other UK income (rental, director's fees, dividends), the CGT rate may be affected. A full tax review before the sale is wise.
Common Mistakes Founders Make
The most common mistake is assuming that because you live in Dubai, you do not owe UK tax on a UK property. That is wrong. The UK taxes UK land regardless of where you live.
The second most common mistake is missing the 60-day deadline. Founders are busy. They close the sale, move on to the next client project, and forget about the reporting. Then six months later they get a penalty letter. The penalty can be significant, and HMRC rarely waives it for "I was busy with my agency."
The third mistake is not keeping proper records of improvements. If you spent £40,000 on a new kitchen and bathroom in 2018 and have no receipts, you cannot deduct it. Keep digital copies of everything in a cloud folder (Google Drive, Dropbox) that you can access from Dubai.
Should You Sell Before or After Moving to Dubai?
There is no tax advantage to selling before you move versus after, assuming the property has been your main home. The CGT rates are the same for residents and non-residents on property (18%/24% from 2024/25). The main difference is the reporting deadline: residents report through self-assessment by 31 January after the tax year; non-residents must report within 60 days.
If you sell before moving, you get the full annual exempt amount (£3,000) and you report through self-assessment. If you sell after moving, you get the same exempt amount but must report within 60 days. The tax calculation is essentially the same.
The real question is whether you want the cash from the sale before you move or after. That is a personal finance decision, not a tax one.
When to Speak to an Accountant
If you are a UK agency founder living in Dubai and you own a UK property, speak to an accountant before you sell. The rules are specific, the deadlines are tight, and the penalties for getting it wrong are real.
As ICAEW qualified accountants, we work with agency founders across the UK and UAE. We handle the 60-day NRCGT reporting, the PRR calculations, and the tax planning around the sale. If your property has been your main home, if you hold it through a company, or if you have other UK income, the position is more complex than a straightforward sale.
Contact us before you exchange contracts. We will run the numbers, file the return, and make sure you do not miss the deadline.
For more on how we work with agency founders, see our services page. If you are a marketing agency founder, we have specific experience in your sector. Read more on our marketing agencies page.
And if you are considering a move to Dubai or have recently made it, our incorporation and structure blog covers the tax implications of international moves for agency owners.