🇬🇧 Tax residency in United Kingdom

You're probably wondering if you've accidentally become a UK tax resident just by being here for a bit. It's not as simple as just counting days, but that's a big part of it.

The basic rule is 183 days. Spend that long in the UK in a tax year (April 6th to April 5th), and you're generally resident. But it's way more complex than that. The Statutory Residence Test (SRT) is the beast you need to tame. Even if you're under the 183-day threshold, you can still be deemed resident if you have enough "ties" to the UK. Think of these as anchors that pull you in.

What counts as a tie? It’s a tiered approach. If you have a UK accommodation available to you and you spend 91 nights or more there, that's a pretty strong tie. Have your spouse or civil partner living here? That’s another big one. Working full-time in the UK? Definitely counts. Even having a significant number of days worked in the UK (91+ days) can be a tie. And if you’re running a registered UK business where you work more than 3 hours a day, that’s practically waving a flag that says "tax me!" Bottom line, don't just think about days; think about your life's connections.

So, you're a UK tax resident. What does that actually mean for your wallet? It means worldwide taxation. Every penny you earn, anywhere on the planet, is potentially subject to UK tax. For high earners, this stings. The top marginal rate is 45%, kicking in on income over £125,140 . If you’re earning, say, £200,000 from your freelance work abroad, you could be looking at paying around £50,000+ in UK tax on that alone, depending on deductions and your specific circumstances. It’s not just income; capital gains and dividends are also on the table.

The UK has introduced a new regime, the Foreign Income & Gains (FIG) regime, for new arrivals from April 2025. If you haven't been resident in the UK for the last 10 tax years, you could qualify for a 4-year exemption on your foreign income and gains. This is massive. You can bring money earned and invested abroad into the UK without paying UK tax on it for those four years. However, it doesn't cover UK-sourced income. You'll still pay tax on any money you earn while you're physically working in the UK. And once those four years are up, you're back to worldwide taxation.

What about treaties? If you’re a US citizen, the US-UK tax treaty generally prevents you from being taxed twice on the same income. It often means you'll pay tax in the country where you're actually resident, with credits for taxes paid elsewhere. For German citizens, similar principles apply under the Germany-UK treaty. The key is usually to claim foreign tax credits to offset your UK liability. Don't assume the treaty automatically makes you exempt; it usually just stops double taxation.

When does paying a local accountant make sense? Honestly, if you're earning over, say, £80,000 a year, or if you have complex investments abroad, or if you're unsure about the FIG regime, paying a specialist is probably worth it. They can save you far more than they cost in tax planning and avoiding penalties.

If you spend more than 183 days in the UK and have significant ties, assume you're resident and plan accordingly.

This information is for guidance only and does not constitute legal or tax advice.