- Travel ledger reconciled to independent evidence
- Homes available, including dates and who could use them
- Family and personal ties
What evidence supports a tax-residence assessment
The awkward truth about tax residence is that two countries can each say “resident” under their own domestic law.
Good records do not prevent that overlap; they make it possible to resolve it.
People often search for one magic number—usually 183 days.
Day counts matter, but domestic rules can also look at an available home, family, economic interests, work patterns or an intention to reside.
A tax treaty may then use a sequence of tie-breakers. Immigration residence and tax residence are separate files.
Keep departure tax records separate from the destination application.
Why a day count or residence certificate may not be enough
Two countries can ask different questions about the same year.
Travel days are important, but the availability of a home, work locations and other ties can also affect the assessment.
Consistent records help an adviser identify the issue and support the position taken on a return.
Preserve evidence as the year unfolds instead of reconstructing it from memory after an enquiry.
A visa, a tax position and a work arrangement need their own checks.
- 1Can you live and work there?
Check the route for the work you will actually do.
- 2Where will you owe tax?
Map your days, income types and continuing home-country ties.
- 3Who handles the paperwork?
Confirm payroll, contributions, filings and deadlines before committing.
For this part of your move, see Working Abroad on Foreign Payroll: EOR vs Genuine Contracting.
How to build a consistent residence record
Keep one calendar that can be proved
Record every arrival and departure, including partial days, transit days and last-minute changes.
Retain boarding passes, passport records, accommodation receipts and a monthly export from a location source you control.
Note the counting convention used by each relevant country; midnight, presence for any part of a day and exceptional absences are not treated identically everywhere.
What catches people out: the calendar is reconstructed from memory after the tax year.
That is when a missed weekend, an overnight flight or a cancelled trip suddenly matters.
Document the facts behind the calendar
Create five folders: homes, family, work, financial life and official status. Keep leases, ownership records and utility bills for homes available to you.
Record where a spouse or dependent children live.
Preserve employment contracts, work-location approvals, invoices, board minutes and a plain-language description of where work was physically performed.
- For the financial-life folder, retain bank and brokerage addresses, insurance, memberships and material local spending—but do not assume any single item proves “centre of vital interests.”
Run the treaty sequence in order
Where a treaty based on the OECD Model applies, advisers usually test a permanent home, centre of vital interests, habitual abode and nationality in sequence.
The exact treaty text controls.
“Permanent home” does not necessarily mean property ownership, and “habitual abode” is more than picking the country with the larger day count.
Write a one-page facts memo at year-end.
State the countries involved, domestic residence result in each, treaty relied on, relevant article, evidence for each tie-breaker and any open uncertainty.
Connect residence to the income map
List every income stream by payer country, contract, account received into, currency and where the work or asset was located.
Add tax withheld and certificates received. Residence affects the scope of taxation; source rules and foreign-tax-credit rules determine how individual items are handled.
Those are related questions, not one question.
Your year-end evidence pack
- Travel ledger reconciled to independent evidence
- Homes available, including dates and who could use them
- Family and personal ties
- Work-location and employer or company records
- Income-by-source schedule and foreign tax certificates
- Domestic-law and treaty questions for each country
- Copies of filed returns, residence certificates and advice received
Make the file boring
Use consistent filenames, a monthly review and a read-only year-end copy. Keep the original evidence, not only screenshots pasted into a document.
If facts change—new home, marriage, board role, long trip—record the date and why.
A boring file is a gift to your future self and to the adviser who does not have to reverse-engineer your life from bank statements.
Keep a calendar that distinguishes presence from work
For every travel day, record where you slept, whether you worked and the evidence you have.
None is perfect alone: a ticket shows intended travel, not necessarily arrival, while a card transaction may have been made by another authorized user.
Keep the facts consistent rather than collecting an unsearchable pile of screenshots.
Separate the household’s calendars. A spouse arriving later, children remaining in school at home, or a worker travelling frequently can produce different analyses.
Record where a home was available and how it was used, not just whether you owned it.
Owning a rental property is different from retaining a home available for personal occupation.
A country can use tests beyond a headline day count, including habitual home or economic and family connections.
Do not jump straight to “center of interests” without first establishing domestic residence and reading the treaty that actually applies.
Match the residence file to the return you will submit
List salary, freelance fees, pensions, rents, dividends, gains and equity awards separately. Record the payer, work or asset location, earning period and payment date.
A payment into a foreign bank is not necessarily foreign-source income; remote services performed in the destination can require a different analysis.
A remittance record does not replace source classification.
Keep the tax year beside every conclusion.
These are not universal treaty tests or immigration permissions.
Arrival late in a year may change the first filing, but it does not erase payroll or local-source income questions.
Ask advisers to explain the evidence required for any certificate or credit claim.
A tax-residence certificate is useful evidence for the period it covers; it does not automatically decide every foreign authority’s view or grant all treaty benefits.
A foreign tax credit normally requires the right type of income, tax and documentation, not just proof that you paid something somewhere.
| Period | Physical location | Work record |
|---|---|---|
| 1 January–30 June | Origin country | 122 modeled workdays |
| 1 July–31 December | Destination | 128 modeled workdays |
| Travel within second period | 20 days elsewhere | Identify work and non-work days |
| Year-end result | Reconcile all 365 days | Assess each country’s rules separately |
Maintain the file monthly. Before a return is signed, reconcile travel dates with payroll, invoices and major asset transactions.
Keep a short note explaining discrepancies, such as a cancelled flight or time spent in transit.
Accurate, ordinary records are generally more useful than a sweeping statement that you “left permanently” on a particular date.
General education only. Residence and treaty outcomes depend on current law, treaty text and personal facts; obtain qualified advice.
For this part of your move, see How to Prepare for a Cross-Border Tax Adviser Meeting.
Learn More
Source review: consult the linked authorities for current requirements; provider acceptance and quotes may differ. Last editorial update: October 2026.
Our guides are prepared with AI assistance and reviewed by the publisher. How we work →
Frequently Asked Questions
Is 183 days the rule for every country?
No. Domestic residence tests vary, and treaties may resolve dual residence using other criteria.
Thailand’s boundary differs, and available homes or connections can matter. Read the rules for both countries before relying on a day-count slogan.
Does my bank’s country determine where income is earned?
No. Work location, asset location and the nature of the income matter.
A foreign payer and a foreign account are relevant facts but do not, by themselves, establish foreign-source income. OECD: tax treaties.
Can I have two domestic tax residences?
Yes, under different domestic tests.
A relevant treaty may resolve residence for treaty purposes, but its sequence and scope must be applied to your facts.
Keep evidence and obtain both-country advice rather than simply selecting the cheaper country. OECD: tax treaties.