Set your inputs and units
Enter amounts in THB and choose a period and rate basis that match the scenario you want to model.
Thai personal income tax
Estimate Thai personal income tax for supported domestic income or verified net income, with brackets and credits.
Calculated in your browser. Income and results are not saved or transmitted.
Domestic individual estimate only. Foreign income, treaties, nonresidents, dividend gross-up and special regimes are unsupported. This is not filing or an eligibility check. Liability is rounded down to whole baht before credits per Revenue Department guidance.
Sources checked 2026-09-08: Revenue Department: calculation, Expenses and allowances
How to use this calculator
Check the assumptions
Review contribution timing, day-count basis or reserve duration. Financial products do not all use the same rules.
Calculate and compare
Read the result and table, then change inputs to compare. Copy the result or reset without leaving this page.
A worked example
Illustrative calculation
Verified taxable net income of 500,000 THB produces 27,500 THB under method one, before method-two comparison and credits.
Compare a second scenario
Copy your first result, then change only the amount or duration to see how that assumption changes the outcome.
Common questions
Where does my information go?
Calculations run in your browser. Financial inputs are neither saved locally nor sent to analytics. Reloading restores the initial values.
Does this match a bank statement or guarantee a return?
This is an estimate under your assumptions, not a guaranteed return. Actual payment dates, fees, taxes and contractual rounding can change the result.