Thailand’s Personal Income Tax (PIT) is a progressive tax administered by the Revenue Department. Employees benefit from a generous employment-income deduction and a personal allowance before the progressive bands apply, so the effective rate on a typical salary is well below the top marginal rate. This free calculator applies the Revenue Department rules to estimate your annual tax and take-home pay.
How it works
The calculation runs in three stages:
- Employment deduction — subtract 50% of gross income, capped at THB 100,000.
- Personal allowances — subtract your allowances (the taxpayer allowance is THB 60,000; you can add spouse, child, insurance and other allowances).
- Progressive table — apply the 8-band PIT schedule to the resulting taxable income:
0 - 150,000 : 0%
150,001 - 300,000 : 5%
300,001 - 500,000 : 10%
500,001 - 750,000 : 15%
750,001 - 1,000,000 : 20%
1,000,001 - 2,000,000 : 25%
2,000,001 - 5,000,000 : 30%
5,000,001 + : 35%Each band only taxes the portion of income that falls inside it, so the tool also reports your marginal and effective rates.
Example
On a gross income of THB 600,000 with the default 60,000 allowance: the employment deduction is capped at 100,000, the allowance removes another 60,000, leaving 440,000 taxable. The first 150,000 is tax-free, the next 150,000 is taxed at 5% (7,500), and the remaining 140,000 at 10% (14,000) — a total of THB 21,500.
This estimate covers income tax only and excludes social security contributions and special deductions. Confirm current thresholds with the Revenue Department. Everything runs locally — your figures never leave your device.