Tax residency
is the status that determines which country taxes a person’s worldwide income. Each state sets its own tests — day counts, permanent homes, centres of vital interests — and when two states both claim a person, double taxation treaties break the tie. Remote work has turned residency into a routine payroll question.
How is tax residency determined in 2026?
Countries combine mechanical and factual tests. Mechanical: presence thresholds such as 183 days in a tax year, or the UK’s Statutory Residence Test with its banded day counts and ‘ties’. Factual: a permanent home, family location, economic interests — Switzerland, for instance, treats settling with intent to stay as residency from day one.
Residency rarely switches cleanly: people acquire a new residency before fully shedding the old one, creating dual-residence periods that only treaty tie-breakers resolve.
- United Kingdom: Statutory Residence Test: automatic tests + ties, 16–183 day bands
- Switzerland: 30 days with gainful activity / 90 days without; or settling with intent
- Germany: Domicile or habitual abode (6-month presence)
- UAE: 183 days, or 90 days with residence/work links (domestic certificate rules)
- Singapore: 183 days in a calendar year, or employment spanning years
Simplified 2026 tests — each regime has exceptions; verify against official guidance per country.
Why does tax residency matter to employers?
Because payroll follows it:
- Withholding obligations: a resident employee usually triggers full local payroll; a non-resident may face source taxation only on local workdays.
- Remote-work drift: an employee who relocates and keeps working remotely can shift residency — and your obligations — without telling anyone.
- Equity and bonuses: residency at grant, vest and pay dates decides which state taxes what portion.
Residency questions interlock with the 183-day rule and treaty tie-breakers under the applicable double taxation treaty; for company-side exposure from mobile staff, see permanent establishment risk.
Keeping track of a mobile workforce
The employer discipline is simple to state and rare in practice: know where your people actually live and work, review changes at least annually, and route relocations through a process that answers the payroll, social-security and immigration questions together. An Employer of Record resolves the employment side when a hire settles in a country where you have no entity. Access Financial supports residency-driven payroll changes across 60+ countries.
FAQ
Can I be tax resident in two countries at once?
Yes — domestic tests operate independently, and overlapping residencies are common in relocation years. Where a double taxation treaty exists, its tie-breaker (permanent home, centre of vital interests, habitual abode, nationality) assigns one treaty residence; without a treaty, both states can tax worldwide income, relieved only by domestic credit rules.
Does working remotely from another country change my tax residency?
It can, faster than most people expect: staying past local day thresholds or establishing a home shifts residency, which then pulls payroll, social security and sometimes the employer’s own tax exposure with it. Short workations rarely bite; recurring months-long stays do. Employers should require notification of cross-border remote-work arrangements.
What is a certificate of tax residency?
An official confirmation from a tax authority that a person or company is resident there for treaty purposes, usually needed to claim reduced withholding or treaty relief in the other state. Banks and payers increasingly demand current certificates, so obtaining them annually for cross-border employees and entities is good operational hygiene.
How do I stop being tax resident when leaving a country?
Exit is a facts-and-paperwork exercise: end the home availability (sell or let the dwelling), move the family and economic centre, deregister where registers exist, file any departure or exit-tax forms, and start residency cleanly elsewhere. Half-moves — family staying, home kept available — are how people stay resident by accident, sometimes for years.