How the gains side of the regime works
The FIG regime is often described as an income measure, but the gains side is just as substantial. HMRC's helpsheet HS266 confirms you can claim relief for qualifying foreign asset gains, plus certain gains taxed under sections 3, 86, 87 and 89(2) of, and Schedule 4C to, the Taxation of Chargeable Gains Act 1992. Mechanically, you tick box 29 on the SA109, report each gain on the capital gains pages, and the identified amounts are deducted from your total chargeable gains for the year. There is no cap: HS266 says there is no limit to the amount of relief which may be claimed. That makes the four-year window a genuine planning opportunity for anyone sitting on foreign shares, funds or property, which is why we cover disposal timing in detail in our guide for investors and high earners.
What the gains claim costs you
The claim has three edges to watch. First, a claim year forfeits the £3,000 CGT annual exempt amount as well as the personal allowance, so modest gains may not justify claiming. Second, HS266 confirms you cannot claim foreign qualifying losses on asset disposals in a claim year, which matters if your portfolio has both winners and losers. Third, the relief only reaches foreign assets: gains on UK property, UK shares and other UK situs assets are taxed as normal. The claim must also be properly quantified, because a relieved gain still has to appear on the return; leaving it off entirely is one of the classic FIG mistakes. Good records of each disposal make the difference if HMRC asks questions later.
Getting the disposal years right, with Horizon
Sequencing is where the money is: a disposal made inside your four qualifying years can be relieved in full, while the same disposal a year later is fully taxable. These are exactly the returns Horizon specialises in. Founder-led by a Chartered Tax Adviser with over 10 years experience, including 7 at a Big Four firm, we prepare the SA109 claim, quantify every gain on the capital gains pages and run the claim-versus-no-claim arithmetic before anything is filed, on a fixed fee agreed upfront. The first FIG returns, for 2025/26, are due by 31 January 2027. Book a free 30-minute clarity call or see the non-dom and residency service.
