Reviewed 2026-10-31. General independent information; check current official immigration, financial and medical guidance before acting.
Expert take — Cost of Asia editorial team Since 1 January 2024, waiting until a later year to bring foreign income into Thailand no longer keeps it out of Thai tax: if you were resident in the year you earned it, it is taxable whenever you remit it. A proposed exemption is often described as if it were law, but as of October 2026 it had not been published in the Royal Gazette. Plan transfers under the rule that applies now.
Thailand's tax rules for foreigners changed sharply in 2024, and much expat advice is out of date. This page is for remote workers, retirees and long-stay residents who bring money in from abroad.
We are not tax advisers, and nothing here is tax advice. Each mistake ends with a question to raise with a qualified Thai tax professional, ideally one who also knows the tax system where your income comes from.
At a glance
| Most at risk | Mistake | What to do instead |
|---|---|---|
| Remote workers, retirees | Remitting later to avoid tax | Track the year each transfer was earned |
| Long-time savers | Mixing pre-2024 savings with new income | Separate accounts, keep 2023 year-end statements |
| Pensioners | Assuming a treaty means zero Thai tax | Read your treaty's specific article |
| Long-stay visa holders | Thinking your visa sets tax status | Count days per calendar year |
| Everyone who remits | Not filing, or relying on the proposed exemption | Get a tax ID, file on time |
How we chose
- How often the mistake appears in official guidance and professional commentary since 2024
- What it can cost in tax, surcharges and fines
- Whether record-keeping or one clear question to an adviser avoids it
Sources: PwC Worldwide Tax Summaries, Revenue Department orders as summarized by tax firms, the Board of Investment, the Thai government portal and law-firm commentary. Checked on 31 October 2026.
1. Remitting later to avoid tax — most common among remote workers and retirees
Bringing money in the year after you earned it used to keep it outside Thai tax. Order Paw. 161/2566 closed that route. According to PwC, foreign income you earn in 2024 or later while resident is taxable whenever you bring it into Thailand, even if you are no longer resident in the year of the transfer.
"Income" is broad: Forvis Mazars' summary of Revenue Department guidance says foreign bank interest is assessable and realized capital gains are taxable when brought in. Rates run from zero on the first 150,000 baht of net income to 35% (PwC).
Ask your adviser: Does spending on a foreign card in Thailand count as a remittance? Published guidance does not settle it.
2. Mixing pre-2024 savings with new income — most common among long-time savers
Order Paw. 162/2566 confirmed that foreign income earned before 1 January 2024 stays outside the new rule even if remitted later. That protection depends on paperwork. No official rule says which money leaves a mixed account first, so Thai Law Online's 2026 guide suggests keeping pre-2024 capital in accounts that receive no new income and holding statements dated 31 December 2023.
Ask your adviser: How do I document transfers from a mixed account?
3. Assuming a treaty means zero Thai tax — most common among pensioners
Thailand has tax treaties with 61 countries, the Revenue Department's director-general told The Nation in 2025. Most give a credit for tax paid abroad rather than an exemption, so you may owe the difference when the Thai rate is higher, and you must claim the credit. Some articles, often for government-service pensions, give the paying country sole taxing rights.
Ask your adviser: Which treaty article covers each income stream, and what proof of foreign tax is accepted?
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4. Thinking your visa sets your tax status — most common among long-stay visa holders
Residency is a day count: 180 days or more in Thailand in a calendar year, across all visits (PwC). The test makes no exception for visa type.
The visa with a written carve-out is the Long-Term Resident (LTR) visa. Royal Decree No. 743 exempts foreign income brought into Thailand for three LTR categories (Wealthy Global Citizen, Wealthy Pensioner, Work-from-Thailand Professional) and sets a 17% rate on qualifying employment income for Highly-Skilled Professionals.
Ask your adviser: Which years am I resident, and if I hold an LTR, how does the decree's timing wording apply to me?
5. Not filing, or relying on the proposed exemption — affects everyone who remits
You cannot file without a Thai tax ID (Thai Law Online). Returns are due 31 March of the following year on paper and 8 April online (PwC), dates the government confirmed for 2025 returns. Late payment adds a 1.5% monthly surcharge, and a summons for unpaid tax can add a fine of one or two times the tax due (government portal).
In May 2025 the Revenue Department proposed exempting foreign income remitted in the year earned or the next (The Nation). A tracker updated 19 October 2026 still showed it unpublished in the Royal Gazette. Thailand also adopted a 2023 framework for automatic exchange of bank account data (Forvis Mazars).
What to check before you decide
- Count your days in Thailand for each calendar year since 2024.
- Keep 31 December 2023 statements for every foreign account.
- Register for a Thai tax ID before your first deadline.
- Check the Royal Gazette status of the exemption before timing large transfers.
FAQ
Do expats pay tax in Thailand on foreign income?
If you spend 180 days or more in Thailand in a calendar year and bring in foreign income earned in 2024 or later, it is assessable. A treaty may reduce what you owe.
Has Thailand's remittance tax exemption become law?
Not as of October 2026. It was proposed in 2025 but had not been published in the Royal Gazette when we checked.
Related guides
- Thailand cost of living
- Tax guides for expats in Asia
- Tax residency checker
- Most tax-friendly places in Southeast Asia
- Best Thailand visas for long stays
- Budget calculator
Sources
- PwC Worldwide Tax Summaries: Thailand, significant developments — Paw. 161/2566 and 162/2566 dates, remittance rule
- PwC Worldwide Tax Summaries: Thailand, taxes on personal income — tax brackets, treatment of residents' foreign income
- PwC Worldwide Tax Summaries: Thailand, residence — 180-day residency test
- PwC Worldwide Tax Summaries: Thailand, tax administration — filing deadlines
- Forvis Mazars: Revenue Department guidance on foreign-sourced income — interest, capital gains, pre-2024 income
- Forvis Mazars: Thailand to start automatic exchange of information — 2023 legal framework for CRS exchange
- Board of Investment: Royal Decree No. 743 (English).pdf) — LTR exemptions and 17% rate
- Thai Government portal: penalties for late tax payment — surcharge, fines, penalties
- Pattaya Mail: government urges on-time filing of 2025 returns (January 2026) — 2026 filing dates
- The Nation: Thailand to offer tax break on foreign income (May 2025) — proposed exemption, 61 tax treaties
- Thai Law Online: what applies in 2026 — tax ID, mixed funds, treaty credit vs exemption
- Thai Law Online: remittance exemption tracker — exemption still unpublished as of 19 October 2026
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