Thailand Tax Calculator (2026)

Thailand Income Tax Brackets (2025)

Personal allowance: THB 60,000

Social Security Fund contribution

Capped at THB 9,000 per year

How much income tax do I pay in Thailand if I'm an expat working locally?

Thailand uses a progressive tax system with 8 income brackets ranging from 0% to 35%, starting at THB 150,000 of taxable income. As a resident employee, you'll benefit from a personal allowance of THB 60,000 and an employment expense deduction of up to THB 100,000 (50% of gross income), which significantly reduces your taxable income before tax is calculated. For example, someone earning THB 500,000 per year would only pay tax on income above THB 150,000 after these deductions are applied.

What mandatory deductions come out of my salary in Thailand?

The main mandatory deduction is the Social Security Fund contribution, which is 5% of your gross income capped at THB 9,000 per year (THB 750 per month). This contribution is deductible from your taxable income, meaning it reduces both the amount you pay in tax and your take-home pay. Together with the employment expense deduction and personal allowance, these deductions can significantly lower your actual tax burden.

Do I need to file taxes in Thailand as a remote worker or expat?

If you are a tax resident of Thailand (generally determined by spending 180 days or more in the country during a calendar year), you must file taxes on your employment income. The tax calculator assumes you are a resident employee with employment income only; if you have non-employment income, foreign income, or are a non-resident, different rules may apply and you should consult a local tax advisor. Thailand does not model tax credits for withholding at source in this calculator, so you may need to settle those separately at filing.

What is the highest tax rate in Thailand and at what income level?

The highest marginal tax rate in Thailand is 35%, which applies to taxable income above THB 5,000,000. The tax brackets progress gradually from 5% at THB 150,000 up to 35%, so your effective tax rate (the percentage of total income paid as tax) will be much lower than the marginal rate. For instance, someone earning THB 2,000,000 would fall into the 30% bracket but would pay an effective rate well below that because only the income above THB 2,000,000 is taxed at 30%.

Can I claim deductions for insurance, donations, or retirement contributions?

The tax calculator's baseline model includes only the mandatory deductions: the employment expense deduction (50% of gross, capped at THB 100,000), personal allowance (THB 60,000), and social security contribution (5%, capped at THB 9,000). However, Thailand does allow additional personal deductions for charitable donations, life insurance, health insurance, mortgage interest, and retirement fund contributions, but these are not included in this basic calculator. You should consult a tax professional to understand how these optional deductions could reduce your actual tax liability.

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