Skip to content
WiT Access

Mobility

How to track residency days when you live across countries

If your year is split between countries, memory is a weak record. A simple count of days is worth keeping. It is evidence you may need. It is not the legal test.

WiT Access Editorial · Reviewed 5 October 2026 · Updated 5 October 2026 · 5 min read

People working on laptops around a shared table in a bright room

People who live in more than one country are often asked, later, where they were. A tax return, a visa renewal, a bank review or a treaty question can all want dates. Reconstructing a year from boarding passes is possible and miserable. A contemporaneous note is better.

What is worth writing down

The minimum is the country you slept in, or the country you were in at midnight, depending on the test you might later face. Because those tests differ, a note of arrival and departure days is safer than a single method you hope is universal. Add a line when a day was a transit, a work trip, or time in a home you still own.

Keep tickets or calendar entries that match the note. The point of the file is that you can explain it. A beautiful dashboard that you cannot tie to a flight is less useful than a spreadsheet you trust.

What a count cannot do

Tax residence often looks at days and at ties: a home, a family, work, and sometimes where your economic life sits. Immigration residence looks at the permission you hold. A tracker that shows 180 days has not applied either test. It has given you, or your adviser, a number to start from.

Two countries can both be interested in the same year. A treaty may then use tie-breakers. That is a technical exercise. The day record is an input, not the answer.

Households are not one diary

A partner, a child at school, or a director who travels for the company can have a different pattern from you. Record them separately if their residence might be questioned separately. A family calendar is a start. It is not five people’s tax positions.

Count nights so a later question has evidence

A day record is a diary, not a ruling. Note the country you slept in, and keep the same method all year so you are not mixing departure days and arrival days without noticing. Travel days are where people accidentally double-count or drop a night. Pick a rule you can explain — for example the country of the hotel that night — and apply it consistently. If you are unsure which night a local test cares about, that uncertainty belongs with a qualified adviser, not with a guess entered as fact.

Separate people. A couple who travel together still may not share a year: one may take a trip the other does not, or one may keep a home the other has left. Record each person. A child at boarding school, a partner who stays for work, or a parent who visits for months can all matter to a later description of where life is centred. The record does not decide that description. It stops you reconstructing it from passport stamps that were never designed for the job.

What to keep beside the count

Tickets, boarding passes and a simple note of addresses you actually used are the companions to the count. You do not need a perfect archive of every coffee receipt. You do need enough to show, if someone asks, that the diary was kept at the time rather than written backwards. Store it somewhere you can open from either country.

Review the count when a contract, a lease or a school year changes, not only at New Year. A move in March makes the months before it as relevant as the months after. Bring the diary to a tax conversation. Do not ask the diary to finish that conversation for you. Immigration residence, a visa’s conditions and tax residence remain different questions even when the numbers look tidy.

A practical checklist

  • Note arrival and departure, not only a running total.
  • Mark transits so they can be explained.
  • Keep the year’s record, not only the last month.
  • Store supporting tickets with the note.
  • Share the file with an adviser if a year looks close. Do not ask the file to conclude.

Questions to ask

  • Which country’s test might apply to me this year?
  • Does that test count days of presence, nights, or something else?
  • Which ties sit alongside the days?
  • Does my partner’s pattern differ?
  • Who should interpret a year that looks borderline?

Common mistakes

  • Treating a round number of days as a safe harbour.
  • Counting only one country and ignoring the other.
  • Losing the record because it lived in one app you no longer use.
  • Assuming a visa’s validity is the same as tax residence.
  • Waiting until a filing deadline to rebuild the year.

WiT Access provides general information and comparison resources. Nothing on this website constitutes financial, tax, legal or investment advice. Always consider obtaining advice from an appropriately qualified professional.

Related tools

Related articles

Dubai skyline at dusk, with illuminated towers and highways

Mobility

What changes when you become non-resident?

5 min read

The River Thames, Tower Bridge and the City of London

Tax

What can change in your tax residence when you move abroad?

5 min read

Aircraft wing above the clouds in warm evening light

Mobility

How to prepare financially before moving abroad

7 min read

Notes for your next chapter

Occasional, practical updates on cross-border money. No product pitches dressed up as insight.

More from Mobility.

Need help choosing the right provider?

Send an enquiry. It is not a recommendation, and it does not create a client relationship.