How should I track days for tax residency?
A practical way to keep a day record for tax-residency questions while recognising that a day count alone is not a tax conclusion.
The useful part of a tracker is not a generic number. It is a travel record you can inspect by place and by the correct tax-year window before you need it.
Record the underlying days
Keep dates, places and supporting evidence. The UK's guidance, for example, asks people to keep records that help establish days and ties. Other countries can use different definitions and evidence.
Capture a day while it is easy to explain. Passport movements, tickets, accommodation, work records and a note about an unusual journey can all be more useful than trying to reconstruct the same period months later. A record should show the facts first; a threshold calculation comes after that.
Use the correct review window
Do not assume every country uses the calendar year or a single annual total. The US substantial-presence test uses a weighted three-year calculation, while the UK Statutory Residence Test has its own tax-year framework. Separate the places you need to review and check the current official rule for each one.
Treat thresholds as prompts
183 days is a common headline, not a global law. Some rules use different windows, lower thresholds or non-day ties. The United States substantial presence test uses weighted days across three years; the UK test includes automatic tests and ties.
A day total can tell you where to look first, but it cannot decide the relevance of a home, family, work, immigration status or treaty. If a result could affect tax filings or a move, ask a qualified adviser to apply the full facts.
How Flags helps
Flags: Country Days Tracker helps maintain a private day record from photo information and manual confirmation, then highlights potential thresholds for review. It is an early-warning tool, not tax advice. Read what Flags tracks, the 183-day rule and the relevant official guidance for your situation.
- Apple App Store: Flags: Country Days Tracker reviewed 2026-08-20
- HM Revenue & Customs: RDR3: Statutory Residence Test (SRT) notes reviewed 2026-07-10
- Internal Revenue Service: Substantial presence test reviewed 2026-07-10
Flags rebuilds country day counts from photos you confirm and warns as you approach thresholds like the 183-day rule. It is not tax, legal or financial advice, and does not determine treaty positions or every jurisdiction-specific exception.
In this section
- What is the US substantial presence test?The IRS test uses at least 31 current-year days and a weighted 183-day total across three years — here is how the weighting works, with a worked example and the exceptions that change the result.
- How does the UK Statutory Residence Test work?The UK Statutory Residence Test uses automatic overseas and UK tests, then a sufficient-ties test where relevant.
- What is the 183-day rule for tax residency?Why 183 days is a common threshold, not a universal tax-residency answer, and why records of days and ties matter.
- Does spending 183 days make me tax resident?A cautious explanation of why a 183-day total can be important without being a universal residency verdict.
- Can a tax residency calculator determine my status?What a tax-residency calculator can usefully do and why an app should be framed as an early warning rather than a legal determination.
- How should I track tax residency days?A practical recordkeeping approach for tax-residency day counts, with clear limits on what a tracker can decide.
- How are days counted for UK tax residency?Why UK tax residency cannot be reduced to a simple 183-day counter and what records help with a Statutory Residence Test review.
- How the Cyprus 60-day tax residency rule worksCyprus lets you become tax resident on just 60 days a year — if you meet three further conditions on days elsewhere, work and a home. The rule, the tests, and the days to track.
- How is a digital nomad taxed in Portugal?Spend more than 183 days in Portugal in any 12-month period and you are generally tax resident on worldwide income. How the day count, a home, and the IFICI regime decide what a nomad owes.
- The 183-day rule in Germany, explainedIn Germany the 183-day rule is mostly a treaty test. Domestic residency turns on having a home (Wohnsitz) or a habitual abode (gewöhnlicher Aufenthalt) — which 183 days can trigger.
- Where are digital nomads tax resident?Digital nomads are not tax-free by default. Most stay resident in their home country until they break ties — and can pick up a second residency by overstaying anywhere. How the days decide it.
- How do I calculate the 183-day rule?To calculate the 183-day rule, count every day of physical presence in a country during its own tax year and compare the total with 183 — then repeat for every country you spent time in.
- Does the 183-day rule apply across Europe?There is no EU-wide 183-day rule. Most European countries use 183 days as a baseline, but each sets its own tax year and its own ties tests, so the line moves country to country.
- The 183-day rule when you're working abroadWorking abroad doesn't switch off the 183-day rule — it adds wrinkles. How workdays count, why a UK contract can keep you resident, and how to keep the day record straight in every country you work in.
- Tax residency rules by country, explainedMost countries use a 183-day baseline, but the tax year, the ties test and the threshold differ in every one. How residency rules vary by country, and how to keep a day record each of them would accept.
- What is the Foreign Earned Income Exclusion (FEIE)?The FEIE lets a US taxpayer abroad exclude foreign earned income up to an annual cap — if they pass one of two tests. How the exclusion works, which test fits which life, and where the day counting comes in.
- What is the bona fide residence test?The bona fide residence test is one of two ways to qualify for the FEIE — a facts-and-circumstances test built on a full tax year abroad, not a day count. Who it fits, and how it compares with the physical presence test.
- Form 8843 — who must file it, and howForm 8843 is how exempt individuals — chiefly F and J students, teachers and trainees — tell the IRS their US days should not count toward the substantial presence test. Who files, when, and what happens if you don't.