Income Tax Calculator
Estimate Thai progressive income tax on salary
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Employment income only: automatically deducts 50% expenses capped at THB 100,000 and THB 60,000 personal allowance. Enter other legally eligible deductions. This is an estimate for filing preparation.
Formula and method
Taxable income = annual employment income − expense allowance − THB 60,000 − other eligible deductions. Apply each progressive tax bracket separately.
Worked example
THB 600,000 income with no other deductions: THB 100,000 expenses and THB 60,000 personal allowance leave THB 440,000 taxable income and THB 21,500 estimated tax before withholding.
Frequently asked question
Can this calculate business income tax?
It covers employment income only. Business income has different expense rules and calculation conditions. Verify deduction eligibility with the Revenue Department before filing.
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