Personal income tax tool

Thailand Tax Residency Calculator

Add each trip to Thailand to estimate your total days present during a calendar year and whether you meet Thailand’s domestic tax residency day test.

Thailand Travel Dates

No name, nationality, age, passport number, or income information is requested.

Calendar year being tested

Trip 1 Arrival date Departure date

The estimate counts each calendar date present in Thailand, including the entered arrival and departure dates. Trips crossing year-end are limited to the selected calendar year, and overlapping dates are counted only once.

Total days in Thailand 0 days Calendar year 2026

Estimated status Add your travel dates

Thailand’s domestic test applies when presence totals 180 days or more in the calendar year.

Trip breakdown

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How the test works

Thailand’s domestic 180-day residency rule

Calendar-year test

Section 41 of the Thai Revenue Code deems a person resident when periods of stay in Thailand aggregate 180 days or more in a tax calendar year.

Multiple trips are combined

Separate visits during the same calendar year are added together. This calculator merges overlapping trip dates to avoid counting the same day twice.

Treaties and filing obligations

This result addresses only the domestic day-count test. A tax treaty, income source, remittance, work activity, and other facts may affect tax residence or filing obligations.

This calculator is a general estimate, not tax advice or an official residency determination. Confirm travel dates against passport and immigration records. Source: Thai Revenue Code Section 41.

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