How to Actually Leave: Tax Residence, Exit Taxes and Timing

Most people research this backwards. They spend weeks comparing Dubai against Portugal against Cyprus, and about ten minutes on the country they are leaving.

That is the wrong way round, and it is expensive. The destination decides what you pay. The departure decides whether you owe anything at home. Get the second one wrong and the first one stops mattering.

Here is what actually has to be true for a move to work.

Rule one: leaving is a test, not a decision

You do not become non-resident by announcing it, by buying a plane ticket, or by getting a residence card somewhere warm. Every country has a test, and you either pass it or you do not.

What the tests have in common is that they look at where your life is, not where your post arrives. Days of presence matter, but so do: where your family lives, where your home is available to you, where your economic interests sit, where you are registered, insured, banked and treated by a doctor.

A person who spends 200 days abroad but whose spouse, house and business remain at home has usually not left, whatever a certificate says.

If you are American, leaving does not end anything

This is the part that surprises people, and it is the single most important paragraph on this page.

The United States taxes its citizens on citizenship, not residence. You can move to Dubai, spend zero days in America, hold a foreign passport as well, and you still file a US return every year on your worldwide income.

What moving abroad gives you is relief mechanisms, not an exit: the foreign earned income exclusion on earned income, and foreign tax credits for tax paid elsewhere. Notice the shape of that: credits only help if the new country actually taxes you. Moving to a 0% country means no credit at all, so the US bill stands in full above the exclusion.

You also keep reporting obligations that have real penalties attached. FBAR is due once your foreign accounts exceed 10,000 USD in aggregate at any point in the year. Form 8938 applies above thresholds that run from 50,000 to 600,000 USD depending on your filing status and where you live.

Renouncing, and the exit tax

The only way out is renunciation, and it has a price tag. You are a covered expatriate, and exposed to the US exit tax, if you meet any one of three tests:

That third test catches people who would otherwise be well under the first two. An unfiled return, a missed FBAR, an underreported account in the past five years, and you are covered regardless of your wealth.

Being covered triggers a deemed sale of your worldwide assets on the day before expatriation, with tax on the gain. It also affects how your future gifts and bequests to US persons are treated.

None of this is a reason not to renounce. It is a reason to fix five years of compliance before you do it, not after.

If you are British, the test is the Statutory Residence Test

The UK replaced decades of case law with a written test, which is a genuine improvement: you can work out your position in advance.

Its logic runs in three stages. First, the automatic overseas tests: pass one and you are non-resident, full stop. Then the automatic UK tests: pass one and you are resident. If neither settles it, the sufficient ties test combines the number of days you spend in the UK with the number of ties you keep there. The more ties, the fewer days you are allowed.

The ties are what catch people: family in the UK, accommodation available to you, work done in the UK, and time spent there in previous years.

Split-year treatment can apply in the year you leave, so that the year is divided rather than treated as wholly resident. It is not automatic and the conditions are specific.

One piece of context that changed the landscape: the UK abolished the non-dom regime in April 2025, replacing it with a time-limited regime for foreign income and gains. That single change is behind much of the recent movement towards Italy, Greece, the UAE and Cyprus.

The traps that catch everyone, wherever you are from

Keeping a home available. A property you could move back into tomorrow is a tie almost everywhere. Renting it out on a long lease changes its character; leaving it empty does not.

Leaving the family behind. A spouse and school-age children who stay put will usually keep you resident, whatever your own day count.

Getting the timing wrong. Most tests run on a tax year. Leaving in month eleven of that year can mean you were resident for the whole of it, and that the capital gain you carefully realised after departure lands inside it anyway.

Selling nothing, and selling everything. Some countries tax you on unrealised gains when you leave, an exit tax. Others tax you on what you sell in the year of departure. The order in which you move and sell is often worth more than the destination.

Assuming a certificate settles it. A tax residence certificate from your new country is evidence, not a verdict. Where two countries both claim you, a treaty tie-breaker decides, and that process happens after a challenge, not instead of one.

What to do, in what order

1. Establish what your current country requires before you fall in love with a destination.
2. Fix your compliance history while you are still resident. It is far cheaper than fixing it under scrutiny.
3. Choose the departure date deliberately, around the tax year and around any sale you plan.
4. Cut the ties that count: home, family, registrations, professional roles.
5. Then choose the destination, and check that a treaty exists between the two countries.
6. Document everything. Flights, leases, utility bills, bank records. The burden of proof will be yours, sometimes years later.

None of this is exotic. It is ordinary planning, done in the right order, and it is the difference between a move that works and one that produces a double residence and an assessment.

Where to go next

Our destination guides cover what you would pay once you arrive: Malta, the UAE, Portugal, Cyprus, Georgia, Paraguay and Panama. The world ranking covers 217 countries, and the comparison tool puts any two of them side by side.

Sources

Figures verified in August 2026 against IRS published guidance and firms specialising in cross-border work. An error reported to us gets fixed.

This page informs, it does not advise. Leaving a tax residence is exactly the situation where general information stops being enough: talk to a professional in both countries before you act, as our terms of use set out.