Non-Resident Capital Gains Tax Calculator

Do non-residents pay UK capital gains tax on selling UK property?

Direct answer: Yes. Leaving the UK does not take a UK property out of UK capital gains tax. Non-residents are within UK CGT on disposals of UK land and property — UK residential property since 6 April 2015, and all UK land plus indirect ("property-rich") disposals since 6 April 2019. You pay on the gain, report it within 60 days, and the gain also goes on Self Assessment (gov.uk, CGT for non-residents; 2026/27).

This is the honest answer to "I've left the UK — surely I don't pay UK tax on my flat?" You stop paying UK tax on your worldwide income and gains once you've broken residence — but UK land is the carve-out that doesn't move. It's taxable whenever you sell, however long you've been away. It's general guidance, not advice — an estimate, not a ruling.

How is the gain calculated when a non-resident sells UK property?

Direct answer: You generally pay only on the gain since the property came into the regime, by rebasing to market value at the relevant date — 5 April 2015 for residential, 5 April 2019 for other UK land — then deducting selling costs and post-rebasing improvements. You can instead elect straight-line time apportionment or the whole-period (historic cost) method if it gives a better result (gov.uk, calculating the gain; CG73795; 2026/27).

1. Rebasing (default). Ignores the historic cost; gain = proceeds − market value at the rebasing date − selling costs − post-rebasing improvements. Best for most who owned the property before the rebasing date — but you need a credible valuation at that date.
2. Straight-line time apportionment. Works out the whole-period gain (cost to sale), then taxes only the slice that falls after the rebasing date, pro-rated by days. Wins when the value rose faster before the rebasing date — no valuation needed.
3. Whole period (historic cost). Gain from original cost to sale, ignoring rebasing. Usually only when it produces a loss.

If you bought after the rebasing date, there's no choice — the gain runs from your actual acquisition cost. Deductible costs are your acquisition cost (including SDLT and buying fees), capital improvement costs (not repairs), and the incidental costs of selling. The calculator applies your ownership share to all of these — each joint owner is taxed on their share and has their own annual exempt amount. The deeper walkthrough lives in our capital gains tax for non-residents guide.

What are the non-resident CGT rates for 2026/27?

Direct answer: UK residential-property gains are taxed at 18% on the part of the gain that falls within your unused basic-rate band and 24% on the part above it, after the £3,000 annual exempt amount (2026/27, frozen). Your other UK taxable income uses up the basic-rate band first. Non-residential gains use the same 18% / 24% individual rates for 2026/27 (gov.uk, CGT rates and allowances; Income Tax rates; 2026/27).

The band split is the bit people miss. The basic-rate band is £37,700 of taxable income (2026/27). If you have, say, £8,000 of taxable UK rental income, only £29,700 of the band is left — so £29,700 of your gain is taxed at 18% and the rest at 24%. With no other UK income, the first £37,700 of the chargeable gain falls in the 18% band. The personal allowance is £12,570 and the higher-rate threshold £50,270, both frozen to 5 April 2028 — the calculator takes your taxable income (after the personal allowance) so it can set the band correctly. A £148,000 chargeable gain with £8,000 of other taxable UK income → £29,700 at 18% (£5,346) + £118,300 at 24% (£28,392) ≈ £33,738 of CGT (illustrative; we never guarantee an amount).

What is the 60-day rule for non-resident capital gains tax?

This is the trap that catches non-resident sellers, and it's why the calculator shows the 60-day flag first, before the tax figure. The reporting duty is separate from, and earlier than, your annual tax return — a non-resident who sells and waits until their Self Assessment deadline has already missed the 60-day window. Don't let "there's no tax to pay" become "so there's nothing to file" — there is. Keep an eye on the clock with our UK tax deadline tracker.

When does this calculator route you to a specialist instead?

Direct answer: When the detail can move the tax by thousands — a needed valuation at the rebasing date, Private Residence Relief if it was ever your main home, an indirect disposal, joint ownership, or a part-disposal. The tool estimates the headline gain, then says so plainly and points you to a qualified adviser and the official HMRC route (gov.uk, calculating the gain; HS307; 2026/27).

A free tool shouldn't pretend a property sale is simple. The rebasing valuation often needs a professional, retrospective figure; if the property was your home for any period, Private Residence Relief and the final-period exemption can cut the gain sharply or remove it; indirect disposals turn on technical 75%/25% tests; and reliefs we don't model can change everything. Naming the edge of what a calculator can safely tell you is the honest thing to do on a tax question this size — that adviser exit is always open.

Does selling UK property interact with the temporary non-residence rule?

Direct answer: UK property is taxable whenever you sell, so the temporary non-residence rule changes nothing for the property itself. But if you were UK-resident in 4 of the 7 years before leaving and return within five years or less, gains on other assets you held before you left — shares, funds — can be clawed back and taxed in your year of return. A clean break means staying away more than five full tax years (HMRC HS278, 2026; 2026/27).

So the two-line frame for everything you own: UK property is taxable whenever you sell; everything else is safe only if you stay away more than five full tax years. Read the temporary non-residence rule guide; and if you let out the property before selling, see UK rental income when living abroad.

Is this calculator tax advice?

Direct answer: No. Quit UK Tax is an educational resource, not a regulated tax, legal or financial adviser. The calculator gives a rough, general estimate from published HMRC rules; it doesn't value your property, assess your circumstances, speak for HMRC, or guarantee any figure. For your own situation — and always for a property sale — consult a qualified adviser and use the official HMRC route.