Tax Residency Day Tracker
“183 days” gets repeated like it’s one rule. It isn’t.
Track your days in every country against the threshold that actually applies — and read on, because the counting method matters as much as the count.
Start tracking ↓This is a day-counting tool, not tax advice. Real residency rules involve more than a single day count — domicile, “centre of life,” ties tests, and treaty overrides all matter, and thresholds and counting methods vary by country. Confirm your actual position with a cross-border tax advisor before making decisions based on this page.
Your countries, side by side
Add each stay by its arrival and departure dates. The tool counts the days against each country’s own threshold and window, flags what’s getting close, and — on the second tab — runs your Schengen 90/180 clock separately. Everything stays in your browser.
“183 days” is not one rule
Every nomad forum repeats the same number, but the number is the easy part. What actually decides whether you cross a threshold is which 183 days get counted, and over what window — and that differs by country.
Days reset every January 1. Spain only looks at days spent there between Jan 1 and Dec 31 of a single year — time there last December doesn’t carry over.
No reset date. The country looks back 12 months from any given day. Portugal works this way — days from last November still count toward a threshold checked next October.
Some countries don’t use Jan–Dec at all. The UK’s tax year runs April 6 to April 5 — count on the wrong calendar and you’ll misjudge your position entirely.
Why this bites people: a nomad who splits roughly 100 days between Portugal and Spain — say 55 in autumn and 50 in spring — can trip Portugal’s rolling 12-month window (both visits sit inside the same trailing 12 months) while staying comfortably under Spain’s calendar-year count, which resets and splits that same travel across two separate years. Identical travel, different outcome, purely because of the counting method.
Set the counting method on every row
Each country row carries a Calendar / Rolling 12 / Tax-year badge. It doesn’t change the math here — it’s the reminder of which window applies before you trust a percentage bar.
Who this tracker is for
If day-counting across borders is a background worry rather than a solved problem, you’re in the right place.
Remote income, no fixed base this year, splitting 12 months across 3–6 countries. You know 183 matters; you’ve lost track at least once.
Two-to-four-month stays in a few favourites, maybe eyeing a second home abroad — where the “permanent home” trigger is already live.
Frequent short work trips into another country. The UK’s workday and “deemed days” rules quietly stack up on you.
Does my arrival or departure day count?
In most jurisdictions, yes — arrival and departure days each count as a full day of presence, even if you were only in the country for a few hours. People assume travel days are “free” and undercount by several days a year as a result.
Schengen’s 90/180 is not tax residency’s 183
Two different offices, two different clocks. Staying legal on your visa-free days tells you nothing about whether a country now considers you tax-resident.
Schengen 90/180 vs. tax residency 183
These two numbers get merged into one worry in people’s heads. They are completely separate systems, run by different authorities, for different purposes.
| Schengen 90/180 | Tax residency 183 | |
|---|---|---|
| What it governs | Immigration — how long you may legally stay without a visa | Whether a country considers you tax-resident and can tax your worldwide income |
| Who enforces it | Border control, one rule across the whole Schengen Area | Each country’s own tax authority, rule differs per country |
| The window | Rolling 180-day lookback, max 90 days inside it | Varies — calendar year, rolling 12 months, or local tax year |
| Complying with one | Does not protect you from the other | Does not protect you from the other |
Staying legally inside your 90 days doesn’t mean you’re safe from tax residency — a single country inside Schengen can set its own, separate 183-day (or other) tax test, and you can trip that while still perfectly legal on your visa-free stay.
One year, three countries, overlapping risk
Meet a hypothetical nomad who thinks she’s being careful: she splits one calendar year fairly evenly, never staying anywhere near a full 183 days in any single country.
- Portugal, 150 days (two visits, both inside the same trailing 12 months) — Portugal’s rolling 12-month window catches both together, pushing her close to its 183-day test far faster than a calendar-year read would suggest.
- Germany, 70 days — nowhere near 183, so she assumes she’s clear. But she registered a rental address (Wohnsitz) for six weeks. That registration alone can trigger German tax residency, independent of the day count.
- Spain, 145 days in the same calendar year — fine under Spain’s own count in isolation, but combined with the other two, a treaty tie-breaker test may still ask where her “centre of vital interests” sits if a dispute arises.
No single country’s day count alone crosses 183 — yet she has a live residency trigger in Germany from address registration, a rolling-window trigger brewing in Portugal, and enough total ties that a treaty tie-breaker could land the decision in Spain’s favour. Day-counting caught none of it on its own.
It’s not just day count
Other common non-day triggers worth knowing exist (confirm specifics with an advisor): keeping a permanent home available to you, having your immediate family based in a country, running a business or holding employment there, and in some countries certain long-term rental contracts.
The tie-breaker rule, in plain language
If two countries’ domestic rules both consider you resident in the same year, tax treaties (most follow the OECD model) apply a cascading test, in this order, stopping at the first one that gives a clear answer:
- Permanent homeWhere do you have a home available to you on a lasting basis — owned or rented long-term, not a hotel or short sublet?
- Centre of vital interestsIf you have a permanent home in both (or neither), where are your personal and economic ties strongest — family, job, bank accounts, where your things actually live?
- Habitual abodeStill tied? Fall back to wherever you simply spend more time, on average, across the two places.
- NationalityStill tied? It comes down to citizenship. (Hold both or neither, and the two tax authorities negotiate it directly.)
This is exactly why day-counting alone isn’t enough — the tie-breaker can override the day math even when no single country’s threshold was technically crossed.
This tracker is for staying aware — not the final call
When the picture gets complicated, a cross-border tax advisor is worth the fee. Here’s how to tell when you’ve hit that point.
Reach out if any of these are true
- Any country in your tracker shows “Approaching” or “Resident,” or you’re not sure which counting method it actually uses.
- You’ve registered an address, opened a long-term lease, or set up a local bank/business anywhere you’re not sure you want to be tax-resident.
- Two or more countries could plausibly both claim you this year.
- You have income, investments, or a business that would be taxed very differently depending on your residency.
- You’re planning travel a year ahead and want to structure it to stay clearly under every relevant threshold — far easier to plan for in advance than to argue about after an audit letter arrives.
Frequently asked questions
Is 183 days always the threshold for tax residency?
No. It’s the most common default, but some countries use lower thresholds (Thailand uses 180), tiered tests based on personal ties (the UK’s Statutory Residence Test can trigger residency at as few as 16 days for some people), or multi-year weighted formulas (the US Substantial Presence Test). Always verify the actual figure for your situation.
Do arrival and departure days both count as full days?
In most countries, yes — both count as full days of presence, not half-days. The UK also has a 30-day “deemed days” exception: once you’ve made more than 30 no-overnight day trips in a tax year, every one after that counts as a full day.
If I stay under 90 days in Schengen, am I safe from tax residency?
No. The 90/180 Schengen rule and a country’s own tax-residency day threshold are entirely separate systems run by different authorities. Staying legal on Schengen tells you nothing about your tax status.
Can I become tax resident somewhere without hitting the day threshold at all?
Yes. Registering an address, maintaining a home available to you, or basing your family or business somewhere can trigger residency independent of days spent — Germany’s Wohnsitz registration is a well-known example.
What happens if two countries both claim me as tax resident?
If there’s a tax treaty between them, a tie-breaker test usually applies in this order: permanent home, then centre of vital interests, then habitual abode, then nationality — stopping at the first one that gives a clear answer.
Does this tool file anything or send my data anywhere?
No. Your stays are saved in your own browser’s local storage on this device only, so they persist between visits — but nothing is ever uploaded, transmitted, or filed with any authority. A “Clear all” button wipes everything.