Thailand Tax Residency Calculator
Estimate whether your days in Thailand may trigger Thai tax residency under the Revenue Department's 180-day rule. Enter your travel periods and get an instant, plain-language assessment.
Informational estimate only — not legal or tax advice
Takes about 1 minute
Enter your travel details
All dates should be the days you physically entered and left Thailand.
Your stays in Thailand — 2026
Add each period you spent inside Thailand. Dates outside 2026 will be automatically excluded.
Add at least one complete stay period to calculate.
How Thailand Tax Residency Works
The 180-day physical presence rule
Under Section 41 of the Thai Revenue Code, any individual who spends 180 days or more inside Thailand within a single tax year (1 January – 31 December) is generally considered a Thai tax resident for that year. The rule counts physical presence — not visa type, domicile, or residence registration.
What Thai tax residents must declare
Thai tax residents are required to declare assessable income from Thai sources. Since 2024, they must also declare foreign-sourced income that is remitted into Thailand in the same tax year it was earned. Income kept abroad and only brought in during a later tax year may not be assessable — though this depends on your specific DTA position.
Double Taxation Agreements (DTAs)
Thailand has DTAs with over 60 countries, including the UK, USA, Australia, Germany, and France. These treaties can significantly reduce or eliminate Thai tax on certain income types. Your actual tax obligations may be very different from what the day-count rule suggests — always check your home country's DTA with Thailand.
Rules are actively evolving
Thailand's Revenue Department issued major new guidance on foreign-sourced income in 2023, effective from 1 January 2024. Further clarifications are expected. This tool reflects publicly available guidance as of May 2026 and should not substitute current professional advice.
This explanation is based on publicly available Thai Revenue Department guidance. Tax rules can change. Always verify your situation with a qualified Thai tax advisor — especially if you have multiple income sources, hold assets in Thailand, or are a citizen of a country with a DTA with Thailand.
Frequently Asked Questions
Common questions about Thai tax residency from expats and long-stay visitors.
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About This Thailand Tax Residency Estimator
This free tool helps expats, digital nomads, retirees, and long-stay visitors to Thailand understand the 180-day physical presence test used by the Thai Revenue Department to assess tax residency status. By entering your arrival and departure dates for each stay in Thailand during a given calendar year, the calculator automatically totals your days and compares them against the 180-day threshold.
The tool is informational only and does not calculate taxes owed, generate filings, or provide legal advice. It is designed as a first-step awareness tool — especially useful for DTV visa holders, retirement visa holders, and remote workers who may be approaching or exceeding the threshold without realising it.
For authoritative guidance, always refer to the Thai Revenue Department (rd.go.th) and consult a licensed Thai tax professional.