Thai Personal Income Tax Calculator (2568/2025)

Work out your Thai personal income tax in seconds. Enter your salary as a monthly or annual figure, then add the allowances and deductions you claim — spouse, children, parents, social security, life and health insurance, SSF, RMF, provident fund, home loan interest and donations. The calculator applies the 50% expense deduction and the 2568/2025 progressive brackets, then shows your net taxable income, total tax, effective rate, monthly tax and a full bracket-by-bracket breakdown, all in your browser.

Income period

Monthly salary Annual income

Income (salary, Section 40(1)) *

฿

Gross salary before tax. Choose whether the figure is monthly or a full year.

Family allowances

Spouse with no income (฿60,000)

Number of children (optional)

฿30,000 per child (legitimate or adopted, within the eligible limit).

Of those, children who are the 2nd+ and born 2561 or later (optional)

These children get ฿60,000 each instead of ฿30,000.

Dependent parents aged 60+ (max 4) (optional)

฿30,000 for each qualifying parent (yours or your spouse's) with low income.

Insurance & investment

Social security contributions (optional)

฿

Contributions you paid (max ฿9,000/year). Typically 5% of salary, capped at ฿750/month.

Life insurance premiums (optional)

฿

Deductible up to ฿100,000 (combined with self health insurance).

Health insurance (self) (optional)

฿

Up to ฿25,000, but life + health insurance together cannot exceed ฿100,000.

Parents' health insurance (optional)

฿

Up to ฿15,000 for health insurance premiums paid for your parents.

SSF (Super Savings Fund) (optional)

฿

Up to 30% of income, capped at ฿200,000.

RMF (Retirement Mutual Fund) (optional)

฿

Up to 30% of income, capped at ฿500,000.

Provident fund contributions (optional)

฿

Your contributions to a provident fund that qualify as a deduction.

Other deductions

Home loan interest (optional)

฿

Mortgage interest on your residence, deductible up to ฿100,000.

General donations (optional)

฿

Deductible up to 10% of income after other deductions.

Your tax estimate will appear here

Enter your income to see your net taxable income, tax due and a bracket-by-bracket breakdown.

Net taxable income

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Total tax (year)

—

Effective rate

—

Tax per month

—

Deductions & allowances applied

Item	Amount

Tax by bracket

Taxable band	Rate	Taxable here	Tax

Estimate only, for salary income under Section 40(1). Actual tax may vary — consult the Revenue Department or an accountant.

How to use

Enter your salary and choose whether the amount is monthly or for the whole year.
Add the family allowances you qualify for: spouse with no income, number of children, and dependent parents.
Fill in insurance and investment deductions — social security, life and health insurance, SSF, RMF and provident fund.
Add home loan interest and donations if you have them; each cap is applied automatically.
Read your net taxable income, total and monthly tax, and the tax charged in each bracket, then Copy summary.

Features

Monthly or annual salary input for Section 40(1) income
Automatic 50% expense deduction capped at ฿100,000 and ฿60,000 personal allowance
Full 2568/2025 allowances: spouse, children, parents, insurance, SSF, RMF, provident fund and more
All statutory caps applied — health, life, SSF, RMF, home loan and 10% donation limit
Net taxable income, total tax, effective rate and estimated monthly tax
100% in your browser — no sign-up and your figures never leave your device

Frequently asked questions

How is personal income tax calculated in Thailand?

For salary income, deduct 50% as expenses (capped at ฿100,000), subtract your personal allowance of ฿60,000 and any other allowances, then apply the progressive rates from 0% up to 35%. The result is your annual tax. This tool does every step for you.

What are the Thai income tax brackets for 2025?

Net taxable income up to ฿150,000 is exempt, then 5% to ฿300,000, 10% to ฿500,000, 15% to ฿750,000, 20% to ฿1m, 25% to ฿2m, 30% to ฿5m, and 35% above ฿5m. Each rate applies only to the income within that band.

How much is the personal allowance and child allowance?

The personal allowance is ฿60,000, a spouse with no income adds ฿60,000, and each child is ฿30,000 — rising to ฿60,000 for a second or later child born in 2561 (2018) or after. Dependent parents aged 60+ give ฿30,000 each, up to four.

Which deductions can lower my Thai income tax?

Common deductions include social security (max ฿9,000), life and health insurance, parents' health insurance, SSF and RMF fund investments, provident fund, home loan interest up to ฿100,000, and donations up to 10% of income after other deductions.

Is this Thai tax calculator accurate for filing?

It gives a reliable estimate for salary earners under Section 40(1) using current rules, but it does not cover every income type or special relief. Treat the result as a guide and confirm with the Revenue Department or an accountant before filing.