Vietnam — Tax Residency (183 Days / Any 12 Months)

Summary

Day threshold

183 days or more

Window

Calendar year, or 12 months from first arrival

Triggers on

Day 183 — track a 182-day cap

Tracked as

Every rolling 365-day window

Also triggers

Registered residence or 183+ days of rented housing in the tax year

Basis

PIT Law No. 109/2025/QH15, Art. 2; Decree 253/2026/NĐ-CP, Art. 4

Authority

Vietnam Tax Department (Ministry of Finance)

You are a Vietnamese tax resident once you are present for 183 days or more — either in a calendar year or in any 12 consecutive months from your first arrival. Because the statute triggers at 183, the last safe count is 182: that is Bounded’s cap, checked across every rolling 365-day window so that neither limb can slip past. A second limb catches anyone with a registered permanent residence in Vietnam, or rented housing covering 183 days or more of the tax year, even on fewer days — unless they prove tax residence in another country.

Who it applies to

This matters most if you are:

• A remote worker basing part of the year in Ho Chi Minh City, Hanoi or Da Nang.
• An expatriate on assignment whose first arrival date, not 1 January, starts the clock.
• Someone holding a long lease on a Vietnamese apartment while travelling most of the year.
• A frequent business visitor whose trips have quietly added up across a 12-month window.

The arrival-anchored limb is the one people miss. Someone who lands in August and stays through March has never had 183 days in a single calendar year, but has comfortably passed 183 inside the 12 months from arrival.

The rule — and why it exists

Article 2 of the Law on Personal Income Tax No. 109/2025/QH15 — in force since 1 July 2026, replacing the 2007 law it expressly repeals — defines a resident individual as one who meets either of two conditions:

• The presence limb. “Being present in Vietnam for 183 days or more within a calendar year or within 12 consecutive months from the first day of arrival in Vietnam.”
• The residence limb. “Having a habitual residence in Vietnam, including a registered place of permanent residence or a house rented to live in Vietnam under a fixed-term lease contract.”

The wording is carried over almost verbatim from the 2007 law, so the substance of the test has not changed — only the citation. Anything you read that anchors the rule to Law 04/2007/QH12 is now out of date.

Decree No. 253/2026/NĐ-CP (in force 1 July 2026) fills in the detail. For foreigners, a registered residence is the address on a permanent residence card or the one declared for a temporary residence card. Rented housing counts only if the lease terms add up to 183 days or more in the tax year — hotels, guesthouses and employer-provided housing included. And someone who has such a residence but is present fewer than 183 days is resident only if they cannot prove, with a certificate of tax residence, that they are resident in another country.

Why it exists: the dual window is deliberately hard to game. A pure calendar-year test lets someone split a long stay across New Year; the arrival-anchored 12-month limb closes that. The residence limb closes the other gap — people who keep a home in Vietnam but keep their days low.

Counting the days

1. 1Count every day of presence in Vietnam. Under Decree 253/2026/NĐ-CP, arrival and departure days both count, and an in-and-out on the same day counts as one day.
2. 2Check the calendar-year total: 183 days from 1 January makes you resident for that year.
3. 3Check the arrival-anchored window too: 183 days inside the 12 consecutive months starting on your first day in Vietnam does the same.
4. 4Bounded watches every rolling 365-day window with a 182-day cap, so a breach fires on day 183 in whichever window reaches it first.
5. 5The residence limb has no presence count. A registered residence, or leases covering 183+ days of the tax year, makes you resident on fewer days unless you prove tax residence elsewhere.

The leap-year caveat. Twelve months is approximated as 365 days. In a leap year, 183 days spread across a 366-day span can peak at 182 in every 365-day window — so the counter can sit at the cap without formally breaching while the calendar-year test has already been met. Treat reaching the cap as being at the line, not one day short of it.

Examples

Example 1 — the clean year

Linh spends 160 days in Da Nang across the calendar year, staying in hotels and short-term rentals with no lease. No 365-day window reaches 183 and no residence limb applies. She is a nonresident, taxed only on Vietnam-source income.

Example 2 — the arrival-anchored trap

Marco lands on 1 September and stays until 30 April — 242 days, or 243 if that February has 29 days. Neither calendar year holds 183 (122 days, then 120 or 121), but the 12 months from his first arrival hold all of them. He is resident under the second half of the presence limb, and a calendar-year-only counter would never have shown it.

Example 3 — resident on 60 days

Amara signs a two-year lease on an apartment in Hanoi for her occasional visits, spending 60 days a year there. The lease covers the whole tax year, so she has a habitual residence under Article 2. She is resident despite the low count — unless she produces a certificate of tax residence from the country where she lives.

Exceptions & edge cases

• The residence limb is easy to trip. Leases covering 183 days or more of the tax year are enough, hotels included. If you keep an apartment in Vietnam, assume the day count is not what decides your status — and keep a certificate of tax residence from your home country if you rely on being resident there.
• The counting rules now come from Decree 253/2026. Article 4 of Decree No. 253/2026/NĐ-CP replaced the Circular 111/2013 conventions from 1 July 2026: arrival and departure days each count, a same-day in-and-out counts once, and passport stamps are the evidence.
• The first tax year is special. Under Article 66 of Decree 253/2026, if you are present fewer than 183 days in your first calendar year but reach 183 within the 12 months from first arrival, your first tax period is those 12 consecutive months. From the second year the tax period is the calendar year, with tax on the overlapping months credited.
• Resident and nonresident rates differ in shape, not just level. Residents face progressive rates on worldwide employment income; nonresidents a flat 20% on Vietnam-source employment income. Crossing the line can cut your bill as easily as raise it.
• Treaty relief. Vietnam has a wide treaty network, and the standard 183-day employment article can protect short assignments even where domestic residency is triggered. Treaty positions need to be claimed, not assumed.

Common misconceptions

• "183 days is safe." No — the statute says 183 days or more. Day 183 is the trigger; 182 is the last safe count.
• "It resets on 1 January." Only the first limb does. The 12-months-from-arrival limb keeps running straight through New Year.
• "The 2007 PIT law still governs." It was repealed. Law 109/2025/QH15 has applied since 1 July 2026 — same test, new citation.
• "No days, no residency." A registered residence, or leases covering 183+ days of the tax year, can make you resident on very few days unless you prove tax residence in another country.
• "A business visa keeps me out of the tax net." Visa class is irrelevant to the test. Only presence and residence matter.

Related: Thailand and Cambodia run similar tests with different windows — useful if you are rotating around the region.

Frequently asked questions

Sources

• Law on Personal Income Tax No. 109/2025/QH15 (English translation; page may require a browser)
• PwC Worldwide Tax Summaries — Vietnam: individual residence
• Official Gazette (Công báo) — Law No. 109/2025/QH15, Vietnamese text
• Government portal — Decree No. 253/2026/NĐ-CP guiding the PIT Law (Art. 4: resident individuals)
• Government portal — Decree No. 253/2026/NĐ-CP, signed text (Art. 4 residency; Art. 66 tax period)