Tax Sources & References

MyThaiTaxes is an independent website and calculator — we are not the Thai Revenue Department or any other government body. To research and check the figures behind our calculator and articles, we rely on authoritative sources: official Thai government publications where we can find them, and reputable professional tax-advisory firms where a primary government page is unavailable, outdated, or hard to parse.

Thai tax rules change, and every taxpayer's situation is different. Nothing on this site is a substitute for checking an official source or consulting a licensed Thai tax advisor for your specific circumstances.

How we verify tax information

1. Identify the specific tax rule or requirement being calculated or explained.
2. Consult authoritative sources — starting with official Thai government publications.
3. Determine which tax year the rule applies to.
4. Record the source, the applicable tax year, and any conditions or limitations that affect it.
5. Incorporate the figure into the calculator or an article, with the source attached.
6. Review the information again when Thai tax rules change.

Every figure in our calculator methodology traces back to a source recorded this way. Where a rule could only be confirmed against a secondary source rather than a primary government document, we say so rather than presenting it as settled fact.

Primary sources

The official government and treaty documents we lean on most for the calculator's core figures.

Sources by topic

A note on tax years

Thai tax rules can and do change from year to year — allowances get adjusted, thresholds are revised, and new decrees are issued. Every source on this page is tagged with the tax year it was reviewed for (2026) and the date of that review (September 2026). If you are relying on a figure for a different tax year, check the source directly rather than assuming it still applies.

Related resources

• →Thailand Tax Calculator
• →How Thai Income Tax Is Calculated
• →Tax Residency Guide
• →Foreign Income Guide
• →About MyThaiTaxes

Found something that looks outdated or incorrect?

We'd rather hear about it than leave it wrong. If you spot a source that's outdated, a broken link, a figure that doesn't match an official document, or a calculator result that seems inconsistent with the sources above, please let us know at info@mythaitaxes.com — or see the About page for more ways to get in touch.