About My Thai Taxes

My Thai Taxes is a free online calculator and information resource designed to help individuals understand and estimate their Thai personal income tax obligations. Whether you are a salaried employee, freelancer, sole proprietor, or company director, the tools here are built to walk you through Thailand's tax system in plain language — without requiring an accounting background.

Thailand's personal income tax rules can be confusing, especially for expats and digital nomads navigating the 180-day residency rule, foreign income remittance requirements, and the range of allowances available to reduce taxable income. This site exists to make that process clearer and more accessible.

What the site offers

→Annual Tax Calculator — A step-by-step calculator covering income, deductions, allowances, withholding, and a full tax breakdown — with a downloadable PDF filing reference at the end.
→Monthly Withholding Estimator — A quick tool to check whether the correct amount of tax is being deducted from your monthly salary.
→Articles — In-depth guides on Thai tax topics including residency rules, freelancer obligations, double tax agreements, retirement income, and more.
→FAQ — Answers to the most common questions from expats, digital nomads, and Thai residents about filing, deductions, and staying compliant.

For developers & AI agents

The annual tax calculation is also available as a free, open API — useful for embedding a Thai tax estimate elsewhere, or for AI agents that need to compute a live number rather than guess one. No API key or account required.

MCP endpoint (Streamable HTTP, tool name calculate_thai_annual_income_tax):

https://mythaitaxes-mcp.hannwill999.workers.dev/mcp

REST endpoint (plain POST JSON, same calculation):

curl -X POST https://mythaitaxes-mcp.hannwill999.workers.dev/api/calculate-annual-tax \
  -H "Content-Type: application/json" \
  -d '{"annualIncome": 800000, "maritalStatus": "married"}'

Covers salaried-employee income tax for now. Results are estimates — see the disclaimer below.

Important disclaimer

The calculators and articles on this site are for informational and estimation purposes only. They do not constitute professional tax advice and should not be relied upon as a substitute for guidance from a qualified Thai tax advisor or accountant. Tax rules can change — always verify current regulations with the Thai Revenue Department or a licensed professional before filing.

Contact

For questions, feedback, or corrections, reach out at info@mythaitaxes.com. If you spot an error in any article or calculator, please get in touch — accuracy matters and updates are made as Thai tax rules change.