Country guideTax residency
Tax residency in Vietnam: how the day count works
Vietnam treats you as tax resident if you are present for 183 days or more in the calendar year, or for 183 days or more in the 12 consecutive months from your date of arrival. A third route needs no days at all: having a permanent residence in Vietnam, including a rented house held under a lease with a definite term.
What is the day threshold in Vietnam?
183 days, measured two ways at once. The first limb is the familiar calendar-year count. The second runs 183 days inside the twelve consecutive months from the date you first arrived, which means a stay that straddles New Year is caught even though neither calendar year on its own reaches the threshold. Either limb is sufficient, so the effective test is whichever one catches you first.
Beside the day count sits a condition that ignores days entirely. Having a permanent residence in Vietnam makes you resident, and that covers both a registered permanent residence and a rented house held under a lease with a definite term. A one-year apartment lease in Ho Chi Minh City is therefore a tax event in its own right. PwC's Vietnam summary sets out all three routes, and the tax administration publishes its guidance through the General Department of Taxation portal.
| Day threshold | 183 days or more, aggregate |
|---|---|
| Counting window | Calendar year, or 12 consecutive months from the date of arrival |
| Partial days | No published part-day convention; count both ends to stay conservative |
| Other triggers | A permanent residence in Vietnam, including a leased house with a definite term |
| Tax authority | The tax administration under the Ministry of Finance, long known as the General Department of Taxation |
| Return deadline | Last day of the third month after the tax year for employer finalisation, fourth month for individuals |
| Source | General Department of Taxation, PwC Worldwide Tax Summaries |
Calendar year or rolling window?
Both, which is the whole point. The calendar-year limb behaves like Thailand or Spain, resetting on 1 January. The 12-month limb behaves like Greece or Portugal, running from a date you choose by arriving. Vietnam then adds a rule about which one governs your filing: where you spend fewer than 183 days in Vietnam during the calendar year of your first arrival, your first tax year is the 12-month period starting on the arrival date, and from the second year onwards the tax year is the calendar year again.
That first-year rule is the piece people miss. It means a late-year arrival does not get a free short year. It gets a twelve-month year that reaches into the following summer.
Do partial days count?
Vietnamese sources do not publish a part-day convention comparable to Malaysia's section 7(1A) or Revenue's guidance in Ireland, and we would rather say that than invent one. The safe working assumption is to count the arrival day and the departure day in full, which produces a figure at least as high as any official method would. If your total sits within a day or two of 183, the answer is worth confirming with a Vietnamese advisor rather than a rule of thumb.
What else can make you resident besides days?
The permanent residence test, and it needs no days at all. Two things satisfy it: a registered permanent residence in Vietnam, and a rented house in Vietnam under a lease with a definite term. Neither depends on how long you actually stay, so an expatriate who signs a twelve-month lease and then spends most of the year travelling can be a Vietnamese tax resident on a day count of well under 183.
This is worth pairing with the day rules rather than reading in isolation. Most people who trip over Vietnamese residency do so because they were tracking days carefully and had already signed a lease that settled the question months earlier. Residence decides whether Vietnam looks at your worldwide income or only at your Vietnam-source income, so the distinction is not academic.
A worked example with 2026 dates
Under 183 in 2026, resident by February 2027
A product manager arrives in Da Nang for the first time on 20 August 2026 and stays on into the following year, without signing a lease.
| Measure | Dates | Days |
|---|---|---|
| Calendar 2026 | 20 Aug to 31 Dec 2026 | 134 (12 + 30 + 31 + 30 + 31) |
| Days still needed | 49 (183 minus 134) | |
| Window from arrival | 20 Aug 2026 to 19 Aug 2027 | reaches 183 on 18 Feb 2027 (31 + 18) |
Calendar 2026 gives him 134 days, comfortably short of 183, and on that limb alone he is a non-resident for 2026. The 12-month window from his arrival tells a different story: 49 more days of continuous presence takes him to 183 on 18 February 2027. Because he was under 183 days in his calendar year of first arrival, his first tax year is 20 August 2026 to 19 August 2027, and he is resident for it.
How do I track my days for Vietnam?
Run two counts side by side: one for the calendar year and one for the twelve months from your first arrival date. The rolling one is usually the stricter of the two and is the one that decides your first year. Then check your housing separately, because a lease with a definite term settles residence regardless of what either count says.
Check a rolling 12-month window
The free 183-day calculator can count your days across any 12-month window, the way the Vietnamese test rolls from your arrival date. Note that the permanent residence condition can decide your status before any day count does.
Rolling counts, recalculated daily
Staydays logs your days in Vietnam automatically and watches every 12-month window for you.
Frequently asked questions
Does Vietnam count 183 days per calendar year or per 12 months?
Both, and either one is enough. You are resident if you are in Vietnam for 183 days or more in the calendar year, or for 183 days or more in the period of 12 consecutive months from the date of your arrival. The rolling variant catches stays that straddle 31 December and would slip under a calendar-year count.
Can a rented apartment make me a Vietnamese tax resident?
Yes, on its own, with no day threshold attached. Having a permanent residence in Vietnam is an independent test, and it covers both a registered permanent residence and a rented house in Vietnam held under a lease with a definite term. Signing a twelve-month lease is therefore a tax decision as well as a housing one.
What is my first tax year if I arrive part way through the year?
It depends on how many days you accumulate. Where you are present in Vietnam for fewer than 183 days in the calendar year of your first arrival, your first tax year is the 12-month period running from the date of arrival. From the second year onwards the tax year reverts to the calendar year.
Do the 183 days in Vietnam have to be consecutive?
No. Days of presence are added together across the counting period, however many separate entries they come from. What changes between the two limbs of the test is only where the period starts and stops: 1 January for the calendar-year limb, your arrival date for the 12-month limb.
When does the Vietnamese tax year run?
1 January to 31 December, except for the first-year case described above. Employer-declared personal income tax finalisation is due by the last day of the third month following the end of the tax year, while an individual filing their own finalisation has until the last day of the fourth month.
Do partial days count in Vietnam?
Vietnamese sources do not publish a part-day convention in the way Malaysia's statute or Ireland's guidance does, so we are not going to state one. Count the arrival day and the departure day in full and your figure will be conservative. If a single day decides your status, that is a question for a Vietnamese tax advisor rather than a calculator.
Which authority decides Vietnamese tax residency?
The tax administration under the Ministry of Finance, which most people still search for as the General Department of Taxation and which was reorganised into a Tax Department structure from March 2025. Registration and filing run through the local or regional tax office. Immigration handles visas and temporary residence cards, and neither of those settles your tax residence.
This guide is general information, not legal or tax advice. Rules change and individual circumstances differ. Confirm details with official sources or a qualified advisor.
Last updated: 2026-08-05