Are you a Thai tax resident? Count the days.
Enter your days to test domestic residence for one calendar year. This result does not decide the tax treatment of a foreign remittance: the income source, earning year, residence in that earning year, exemptions and the applicable DTA still matter.
- The result answers
- Whether the entered presence reaches Thailand's domestic 180-day line for one calendar year.
- The next evidence
- Income source, earning year, residence in that earning year and the actual remittance record.
- Still unresolved
- Exemptions, treaty residence, foreign-tax credit, filing position and the amount of any tax.
Enter your actual or planned aggregate days in {{YEAR}}. The arrival-date shortcut assumes continuous presence from that date through 31 December {{YEAR}}; use the day field if you expect to leave and return.
This is general information, not tax advice.
This tool answers one question only: whether the entered day count reaches Thailand's domestic 180-day residence threshold for the displayed calendar year. It does not classify income, calculate tax, determine treaty residence or decide whether a remittance is assessable. Take qualified advice before acting.
// A day count is the first branch
Carry the calendar result into the income analysis.
Record the aggregate presence, then assemble the earning-year, source, remittance and treaty facts a qualified adviser will need. Visa status and domestic tax residence remain separate decisions.
What the 180-day line actually means
180 days in a calendar year establishes domestic residence for that year. The days can be one stay or multiple stays. Tax residence is separate from visa status and must be tested again for each calendar year.
Foreign-income treatment starts with the year the income arose. Current Revenue Department guidance asks whether foreign-source income arose from 1 January 2024 onward while the individual was resident in Thailand in that earning year, and whether it was then remitted to Thailand. If those conditions are met, the remitted amount is included in the tax year of remittance, subject to exemptions and treaty rules.
Residence in the transfer year is not the whole test. Income earned before 2024 and income earned while non-resident are treated differently in the Revenue Department's official examples. Thai-source income is also a separate branch and can be taxable regardless of where payment is received.
LTR and DTA relief is specific. Royal Decree No. 743 names Wealthy Global Citizen, Wealthy Pensioner and Work-from-Thailand Professional in its foreign-income provision; Highly Skilled Professional has separate treatment. A DTA must be checked by country, residence status and income type, with evidence of foreign tax paid.
Want the fuller picture on rates, allowances and filing? See the Thailand tax guide, weigh it against your cost of living, then review the record trail in the banking guide.
- Where did the income arise?Thai-source income and foreign-source income do not use the same sequence.
- When was it earned?Record the actual earning year; pre-2024 income is treated differently.
- Were you resident in that earning year?Use the day counter for that calendar year, not only the year of transfer.
- What entered Thailand?Trace the amount and date of each remittance to the underlying income or capital record.
- Does relief apply?Check domestic exemptions, the relevant DTA, foreign tax evidence and credit limits.
Thai tax residency questions, answered
How many days make you a tax resident in Thailand?
180 days or more in a single calendar year (1 January to 31 December). The days do not need to be consecutive — every day you are physically present in Thailand counts toward the total, so several short trips add up the same way one long stay would.
Does being resident this year make every foreign remittance taxable?
No. For foreign-source income, current Revenue Department guidance also checks when the income arose and whether you were resident in Thailand in that earning year. Income earned before 2024, exemptions and the applicable DTA can change the result.
Do the 180 days have to be consecutive?
No. The test counts the total number of days you are present in Thailand across the whole calendar year. A few weeks here, a month there — they all add to the same running total.
Is this calculator tax advice?
No. It is a day counter for one domestic residence test. It does not establish treaty residence, classify funds, calculate assessable income, apply an exemption or determine a filing obligation.
Primary-source register
The official rules behind the counter.
Official sources accessed 23 August 2026. This tool intentionally stops before individual tax calculation.
- Revenue Department · Section 41 explainer180-day threshold and the foreign-income earning-year, residence and remittance conditions.Open PDF ↗
- Revenue Department · foreign tax credit manualNovember 2025 sequence, DTA review, evidence requirements and credit limitations.Open PDF ↗
- Revenue Code · Sections 38–64English-language statutory text, including Section 41.Open source ↗
- Royal Decree No. 743Category-specific LTR tax provisions.Open PDF ↗