🇹🇭 Thailand tax residency calculator
Enter your stays in Thailand (and anywhere else — one ledger feeds every country) and the calculator applies the Thai rule over the calendar year, shows the exact day count against 180 days, and tells you how many safe days remain.
Your travel ledger
Paste your travel list (one stay per line)
Format: YYYY-MM-DD ~ YYYY-MM-DD XX with the two-letter code of a
country on this site, or a single day YYYY-MM-DD XX.
How the Thai rule works
Thailand makes you a tax resident when you are present for 180 days or more in any tax year (Revenue Code s 76) — three days earlier than the famous 183 figure.
The threshold matters most because of the remittance rule: Thai residents who bring foreign-sourced income into Thailand are taxable on it, which is why the 180-day line is the number remote workers watch. The Revenue Department tightened the timing of this rule in 2024 (taxing remitted income in the year the income arose rather than the year remitted), and practice continues to evolve — verify the current position.
Residency also matters for the treaty position and for Thailand’s efforts to align with international standards. If two countries claim you, the Thailand–X treaty tie-breaker decides.
- Revenue Code of Thailand, s 76, Resident of Thailand — 180-day presence rule — official text
- Thai Revenue Department, Personal income tax — residency and foreign-sourced income remittance — official text
Every calculation above follows the cited publications. If a rule changes, the verification date above is updated — pages with stale dates are flagged for re-verification.
What this calculator does not decide
- The remittance rule for residents’ foreign income (and its 2024 timing change) is not modeled — only the residency threshold is.
- Work-permit and immigration status are separate from tax residency.
- If another country also treats you as resident, the applicable double-tax treaty tie-breaker decides.
Thailand residency FAQs
How many days can I stay in Thailand without becoming tax resident?
Up to 179 days in the calendar year. From 180 days you are a Thai tax resident for that year — and then the remittance rule can bring foreign income you bring into Thailand into the Thai tax net.
Why 180 and not 183?
The Revenue Code sets the line at 180 days. Thailand is one of the countries whose threshold is simply not 183 — a common blind spot in generic calculators.
I am a Thai resident and my foreign salary stays abroad. Is it taxable?
Foreign income that is NOT brought into Thailand is generally outside Thai income tax for residents, while remitted foreign income is taxable — and since 2024 the Revenue Department applies the rule based on the year the income arose. Confirm the current interpretation before relying on either way.
Does the day I arrive in Thailand count?
The calculator counts every day on which you are present at any time, including arrival and departure days.