If you're an agency founder planning a move to Dubai, you've probably already thought about the big ticket items: corporation tax, dividend planning, and whether your company structure still makes sense. But there's a quieter question that often gets overlooked until the last minute.
What happens to your carried forward capital losses when you become non-resident?
You might have built up losses from share options that went underwater, a previous business that didn't work out, or an asset disposal that crystallised a loss. Those losses have value. They sit in your tax history waiting to offset future gains. But the rules around using them from outside the UK are specific, and getting them wrong can cost you real money.
The Short Answer: Your Losses Don't Vanish
Let's start with the good news. When you leave the UK, you don't lose your accumulated capital losses. They remain on your tax record with HMRC, available to carry forward indefinitely. That's the same rule that applies to UK residents. The losses don't expire just because your tax residence changes.
But here's where it gets complicated. While the losses survive your departure, your ability to use them depends on what kind of gain you're trying to offset, and when that gain arises.
Using Losses Against UK Gains While Non-Resident
If you remain non-resident and later sell a UK asset that generates a capital gain, you can use your carried forward losses against that gain. This applies to assets like:
- UK residential or commercial property
- UK shares in a private company (including your agency)
- UK business assets
The key point is that the gain must be one that HMRC can still tax you on. As a non-resident, you're only liable for UK capital gains tax on:
- UK property (directly held)
- UK land and property-rich entities
- Assets used for a UK trade (less common for non-residents)
If you sell your agency shares while living in Dubai, that's a UK asset disposal. You'll need to report it to HMRC and pay UK capital gains tax. And yes, you can offset your carried forward losses against that gain, provided you meet the conditions.
The Trap: Losses Can't Offset Gains from the Same Year
Here's a nuance that catches people out. When you're UK resident, you can use current year losses against current year gains automatically. When you're non-resident, the rules change.
If you realise a capital gain in a tax year while non-resident, you can only use losses that were already carried forward from previous years. You cannot use a loss that arises in the same tax year to offset a gain in that same year, unless you are still UK resident for that year.
Practically, this means you need to think about the timing of any disposals. If you're planning to sell your agency shares in 2026/27 and you become non-resident in 2025/26, your carried forward losses from before 2025/26 are fine. But any losses you realise in 2026/27 itself won't be usable against gains in that same year.
What About Losses on Foreign Assets?
If you have capital losses from foreign assets (say, shares in a US company or a property in Spain), those losses are treated differently depending on when they arose.
Losses that accrued while you were UK resident are UK losses. They can only be used against UK gains, even after you leave. They cannot be used against foreign gains that the UK doesn't tax.
Losses that accrue after you become non-resident are not UK losses at all. They belong to your new tax jurisdiction. The UK has no interest in them, and you cannot bring them back into the UK system if you return.
This is a common point of confusion for agency founders who own overseas assets and assume their UK loss pool can cover everything. It cannot.
Capital Losses Carried Forward Non-Resident: The Reporting Requirements
If you want to use carried forward losses while non-resident, you need to report them to HMRC. This isn't optional. You must submit a self-assessment tax return (SA100) for the year in which you realise the gain, even if you are non-resident for the full year.
On that return, you'll declare the gain and claim the losses. HMRC will want to see evidence that the losses were correctly computed and that they have been carried forward correctly. If you haven't been keeping records, now is the time to start.
For agency founders moving to Dubai, this is where working with an accountant who understands both UK and UAE tax rules becomes essential. At Agency Founder Finance, we're ICAEW qualified accountants who specialise in exactly this transition. We help founders keep their UK tax affairs in order while managing their UAE residence.
What Happens If You Return to the UK?
If you return to the UK after a period of non-residence, your carried forward losses come back with you. They are available for use against future UK gains as if you had never left.
But there's a time limit to be aware of. If you are non-resident for five years or more, and then return, certain gains that accrued during your non-residence may be deemed to arise on your return. This is the "temporary non-residence" rule, and it can bring gains back into the UK tax net even if you thought you had escaped them.
Losses cannot be used to offset these deemed gains if they arose during the period of non-residence. The rules are complex and fact-specific. If you're planning a return within five years, speak to your accountant before you leave.
Practical Steps for Agency Founders
Here's what you should do before you move:
- Quantify your loss pool. Go through your tax returns for the last four years and identify every capital loss that has been carried forward. If you have losses from share options or previous ventures, make sure they are properly recorded with HMRC.
- Check your records. HMRC can ask for evidence of losses even years later. Keep share certificates, disposal statements, and any correspondence with HMRC about loss claims.
- Plan your disposals. If you intend to sell your agency or any other UK assets, think about whether to do it before or after you leave. The timing affects which losses you can use.
- File returns. Even if you are non-resident and have no UK income, you may still need to file a return if you realise a UK gain. Don't assume you're done with HMRC.
Common Scenarios for Agency Founders
You have losses from a failed agency
Many agency founders have losses from a previous business that didn't work out. If those losses are properly carried forward, they can offset gains from your current agency when you sell. This is a legitimate and valuable tax relief.
You have losses from share options
If you exercised share options in a previous company and the shares later became worthless, you may have a capital loss. These are often overlooked because the paperwork is complex. But they are real and can be used.
You have losses from property
If you sold a UK property at a loss while resident, that loss is carried forward. It can be used against future UK property gains, even if you are non-resident at the time of the later sale.
Final Thoughts
Capital losses carried forward when non-resident are not lost. But they are not automatically usable either. The rules are specific, and the penalties for getting them wrong are real.
If you are an agency founder planning a move to Dubai or any other jurisdiction, get your loss position sorted before you leave. Quantify the losses, document them properly, and understand how they interact with your future plans.
At Agency Founder Finance, we help agency founders navigate exactly this kind of planning. Our ICAEW qualified team works exclusively with agency founders, so we understand the specific assets, structures, and timelines that matter to you.
If your capital losses position is unclear, or if you are planning a disposal of your agency shares while non-resident, get in touch. We'll help you work through the numbers and make sure nothing is left on the table.