How Is Tax Residency Determined for Expats in Vietnam?
An individual is generally a Vietnam tax resident if present in Vietnam for 183 days or more in a calendar year, or 183 days or more within any 12 consecutive months from their first date of arrival — or if they meet the statutory permanent/regular residence test. Residency status decides whether worldwide income or only Vietnam-sourced income is taxed.
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Why This Question Comes First
Every other personal tax question an expatriate in Vietnam asks — what rate applies, whether overseas salary counts, whether Social Insurance applies — depends on one prior answer: is this person a Vietnam tax resident or not. Getting this wrong at the start of an assignment carries through every later calculation.
The Residency Tests
Vietnam applies two separate day-count tests, plus a residence test — meeting any one of them is enough.
- 183 days or more present in Vietnam within a calendar year.
- 183 days or more present within any 12 consecutive months, counted from the individual's first date of arrival in Vietnam — not the calendar year.
- A statutory permanent or regular residence test (e.g. registered permanent residence, or a long-term rental lease), independent of the day count.
What Residency Determines
Residency status decides which income Vietnam has the right to tax, not just what rate applies to it.
- A Vietnam tax resident is generally taxed on income arising both inside and outside Vietnam — worldwide income.
- A non-resident is taxed only on income arising in Vietnam.
If Your Status Changes Mid-Assignment
Residency isn't simply "non-resident before day 183, resident from day 183." Because the 12-consecutive-month test counts from the individual's first arrival date rather than the calendar year, a status set early in an assignment can still be provisional. If later travel records show the residency conditions are met, a reassessment may be needed — covering the applicable tax period, the PIT already withheld, available deductions, and whether the final position leaves additional tax due or an amount to reclaim.
Tax already withheld during the provisional period isn't lost — it carries into that reassessment rather than being recalculated automatically month by month. This is exactly the scenario that makes a review before departure worth doing properly; see PIT finalization before leaving Vietnam.
Legal basis: Law on Personal Income Tax No. 109/2025/QH15, effective 1 July 2026, as amended by Law No. 09/2026/QH16. This content was manually researched and reviewed by RedTab (last reviewed 12 August 2026) rather than sourced through RedTab's usual citation-verification process for its service pages — general regulatory information, not a legal or tax opinion for any specific individual. Content last verified 2026-08-12.
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