The Hidden Tax Residency Trap for Founders and Remote Teams

For internationally mobile founders and the remote teams they build, tax residency is the risk that hides in plain sight. People assume that leaving a country, or spending most of the year elsewhere, cleanly ends their tax obligations there. It rarely works that way.

Residency is decided by a layered set of rules, and the gap between what people believe and how the rules really operate is where expensive surprises live: two countries claiming the same income, filing obligations that persist after you have physically gone, and structures that unravel because a single person spent too long in the wrong place. It is a particular concern for the digital nomads and perpetual travellers who assume constant movement keeps them outside every tax net.

This is how tax residency really works across borders, and where the traps sit.

The 183-day rule is not the rule most people think it is

Almost everyone has heard some version of it: stay under 183 days in a country and you are not tax resident there. It is one of the most persistent myths in international tax. The 183-day count exists in many countries, but it is usually only one of several triggers, and in some jurisdictions it is not the primary test at all. You can become tax resident well before you reach 183 days, or without ever reaching them.

The United Kingdom is the clearest example: its Statutory Residence Test can make you resident on as few as 16 days in a year if you have enough other connections to the country, through the combination of day counts and “ties” such as available accommodation, family, and work.

France treats the 183-day figure as only a sub-test of its “principal place of stay” criterion, and can find residence through your household or the centre of your economic activity instead. Australia leans on a “domicile” and “permanent place of abode” concept rather than a simple day count. Treating 183 days as a universal safe harbour is the first and most common mistake.

Domestic law comes first, and it can catch you twice

The correct way to think about residency is in two steps. First, each country applies its own domestic law to decide whether you are resident under its rules. Only if two countries both claim you does an international treaty step in to resolve the conflict. The important consequence of that order is that domestic filing obligations do not disappear just because a treaty later assigns you elsewhere. You can be a treaty resident of one country and still owe returns, disclosures, or exit formalities in another.

This is exactly how founders get caught. Someone leaves Germany for Portugal, assumes the move is clean, and later discovers that because they kept an apartment available in Germany, or their spouse and business ties remained there, German domestic law still treats them as resident, even though they now spend most of the year in Lisbon. Both countries claim them. Both expect filings. The move that felt final on the plane was never final on paper.

How treaties break a tie: the OECD cascade

When two countries both claim you as resident, a double-taxation treaty resolves it, and most of the world's treaties follow Article 4(2) of the OECD Model Tax Convention. It applies a fixed cascade, tested in order until one gives a clear answer:

• Permanent home: the country where you have a home permanently available to you. If that is only one country, the analysis stops here.
• Centre of vital interests: if you have a home available in both, residency goes to the country with which your personal and economic relations are closer, family, work, business, and assets.
• Habitual abode: if the centre of vital interests cannot be determined, the test looks at where you truly spend time, by frequency and regularity.
• Nationality: only reached if the first three are inconclusive, which is rare in practice.
• Mutual agreement: if none of the above settles it, the two tax authorities negotiate directly.

In real disputes, most cases are decided at the first or second step. That matters, because it means the deciding factor is usually not how you count your days, but where your home and your life's centre of gravity sit. A founder who moves but leaves a home available and a business rooted in the old country will often lose the tie-break there, regardless of the calendar.

Centre of vital interests: the test founders underestimate

Because the cascade so often turns on the centre of vital interests, it deserves closer attention. Tax authorities weigh a wide set of factors: where your family lives, where your main business and income sources are, where you hold bank accounts and investments, where you own or rent property, where your social and civic ties are, and where you are registered for the ordinary business of life.

No single item is decisive; authorities look at the overall picture. A founder who relocates personally but keeps the company, the key relationships, and the main assets in the origin country has, in the eyes of that country's revenue authority, never really left. Courts across Europe have repeatedly upheld residence on the strength of personal and economic ties even where the taxpayer had registered and paid tax elsewhere.

Where remote teams add a second layer of risk

For founders who employ people internationally, tax residency is not only a personal problem. It compounds when a distributed team is involved, in two ways.

First, an employee who becomes tax resident in a new country creates local income-tax and often social-security obligations for the employer there, whether or not the company has any presence in that country.

Second, a senior employee or director who spends substantial working time in one country can create a taxable corporate presence, a permanent establishment, that pulls company profits into that country's tax net.

Enforcement varies sharply by jurisdiction, and a handful of countries are notably aggressive.

Germany runs aggressive audits and reads presence broadly; France deemed a two-year home office a taxable presence in a 2023 ruling and can levy penalties of 40 to 80 percent; Austria applies an explicit rule treating 50 percent or more home-office time as a presence; India does not follow the OECD's 2025 guidance at all, applying its own stricter service-based threshold; and China enforces its own rules strictly.

Put simply, where your people sit determines how exposed the company is, and some countries will look much harder than others.

The 2025 update to the OECD Model Tax Convention addressed exactly this, clarifying when a home office used by a remote employee amounts to a place of business “at the disposal” of the employer. The upshot for founders is that where your people live and work is now a corporate tax question, not just an HR one. A team scattered across several countries can quietly create obligations, and exposure, in each of them.

Practical ways to avoid the trap

None of this argues against international living or global hiring. It argues for doing both deliberately. A few principles keep founders and their teams out of the worst of it:

1. Cut ties, not just days. If you leave a country, address the things the tie-break really weighs: give up the permanently available home, move the centre of your economic and family life, and complete the formal exit steps the country requires.
2. Check the domestic test of every country you touch, before assuming a day count protects you. The threshold that makes you resident is frequently far below 183 days.
3. Map where your team is tax resident. Each employee's residency drives payroll, income-tax, and social-security obligations for the business in that country.
4. Watch senior people's working location. A director or key decision-maker spending long periods in one country can create a permanent establishment and drag corporate profit into its tax base.

For the employment side of this, engaging staff compliantly in each country, running correct local payroll, and keeping social-security obligations in order, is where the practical work sits.

Many companies use an employer of record for exactly this. In a strict market, using an employer of record in Germany can be a cleaner solution than the business employing there directly, because a locally established entity becomes the legal employer and handles the payroll, tax, and social-security rules that residency triggers, without the parent company taking on the same exposure.

The through-line is simple. Tax residency is not a switch you flip by boarding a plane or watching a day counter. It is a layered judgment about where your home, your life, and your business truly sit, made first by each country's own law and then, if they disagree, by a treaty cascade that rewards substance over calendars.

Founders who treat it as an afterthought discover the trap the expensive way. Those who plan around where they and their people are truly resident keep the freedom of a global life without the double bills that quietly come with it.