What is "tax residency" and why should I care?

Tax residency is the country that gets to tax your worldwide income. It's not the same as citizenship, and it's not the same as where you spend most of your time. Every country has its own rules for deciding if you're tax-resident there. Until you actively change yours, it's almost always the country you most recently lived in. As a nomad, this is the single most important thing to get right.

Can I just leave the country and stop paying tax?

No. Walking out the door doesn't break your tax residency. You have to formally exit under your home country's specific rules: deregister, fall under the day-count threshold, sever ties (home, family, business). Skip that step and you stay on the hook regardless of where your suitcase is.

What's the difference between citizenship and tax residency?

Citizenship is your passport (nationality). Tax residency is which country claims your income for tax purposes. They're independent. A British citizen can be tax-resident in Paraguay; a German citizen can be tax-resident in the UAE. Only the United States and Eritrea tax their citizens on worldwide income regardless of where they live.

Is the 183-day rule the only test that matters?

No. Spending 183 or more days somewhere usually triggers tax residency there, but spending fewer than 183 days in your old country does not automatically remove you from its tax system. Most countries also look at where your home is, where your family is, where your business is run from, and where your "centre of vital interests" lies.

What is an OECD tie-breaker rule?

When two countries both claim you as tax-resident under their own rules, the OECD double-tax treaty between them decides who wins. The hierarchy: (1) where you have a permanent home, (2) centre of vital interests, (3) habitual abode, (4) nationality, (5) competent-authority negotiation. The practical translation: do not leave both countries thinking you live there.

I'm a UK resident. How do I cleanly exit?

The UK uses the Statutory Residence Test (SRT) since April 2013. You need to either pass an automatic non-resident test (for example, fewer than 16 days in the UK if you have been resident in any of the prior 3 years), or fall under the sufficient ties threshold for your day count. You also file a P85 with HMRC. Get this wrong and HMRC can claim you for years.

I'm a Spanish resident. What's the exit?

Spain looks at three things: 183 or more days in Spain, your centre of economic interests being in Spain, or your spouse and minor children living in Spain. You need to break all three. Then deregister from the padrón municipal, file Modelo 030, and Modelo 720 if you held foreign assets above the threshold. Spain is one of the harder exits in Europe.

What is the German Wegzugsteuer and does it apply to me?

The Wegzugsteuer (exit tax) hits anyone who has been a German tax resident with a 1% or greater stake in any company (German or foreign) when they leave. The state treats your shares as sold at fair market value on departure and taxes the gain. If you are a founder or hold equity in a startup, you need to plan this years ahead, not weeks.

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Everything you need to know about Paraguay tax residency: 0% foreign-source tax, 3-day setup, documents, costs, and the mistakes people actually make.

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