In January 2024, my Thai accountant — normally the calmest person I know — called me on a Saturday morning. That never happens. Her exact words: "Marc, we need to talk about your French income." I nearly spat out my coffee. For six years, the money I earned in France and transferred to Thailand had never been a tax issue here. The unspoken deal was simple: as long as the income had been earned the previous year, the Thai taxman didn't care. As of January 1, 2024, that deal no longer exists.
I'm going to break down what changed, what it actually means in practice, and — most importantly — the mistakes I see expats making all around me in Bangkok, Chiang Mai, and Phuket. I'm not a tax lawyer — I'm a guy who runs a blog and had to dig deep into this stuff to protect his own finances. Think of this article as a starting point, not legal advice.
The old rule: the (almost) official tax paradise
Until December 31, 2023, Thailand applied an extremely generous interpretation of its tax code. The rule was laid out in the Revenue Department's Departmental Order Por. 161/2566. In a nutshell:
- You were a Thai tax resident if you spent 180 days or more per year in the country.
- Your foreign-sourced income was only taxable if it was transferred to Thailand in the same calendar year it was earned.
In practice, what did that mean? You earned money in 2022 through your SASU in France, you transferred it to your Bangkok Bank account in 2023, and the Thai taxman left it alone. A lot of expats — myself included — built their entire financial lives around this mechanism. We'd let the money sit for a year in a European account, then bring it over at our leisure.
This system had been in place for decades. It was well-known, well-documented, and used on a massive scale. It was one of the unspoken selling points for attracting Western retirees and digital nomads.
What changed on January 1, 2024
The Thai Revenue Department issued a new directive that kills the famous previous-year rule. From now on:
2024 Rule: All foreign-sourced income transferred to Thailand by a tax resident (180+ days/year) is taxable, regardless of the year that income was earned. This includes salaries, dividends, rental income, capital gains, pensions, and online business income.
In concrete terms, the old "let it marinate for a year" trick no longer works. Whether you transfer income earned in 2019 or in 2024, the Thai taxman now considers it taxable the moment the money hits Thai soil.
The official reason? Thailand wants to broaden its tax base and align with international standards, particularly the OECD's Common Reporting Standard (CRS), in which it participates. Unofficially, the government needs revenue after COVID, and expats are an easy target to identify.
Before vs. after: what actually changes
| Criterion | Before 2024 | From 2024 onward |
|---|---|---|
| Tax residency | 180+ days in Thailand | 180+ days in Thailand (unchanged) |
| Thai-sourced income | Taxable | Taxable (unchanged) |
| Foreign income transferred the same year | Taxable | Taxable (unchanged) |
| Foreign income transferred the following year or later | Not taxable | Taxable |
| Foreign income not transferred to Thailand | Not taxable | Not taxable (unchanged) |
| Savings/capital accumulated before 2024 | Not applicable | Not taxable (not income) |
| France-Thailand tax treaty | Applicable | Applicable (unchanged) |
The key takeaway: only the transfer to Thailand triggers taxation. If you leave your income in a French or European account, Thailand can't — in theory — tax it. But the moment that money lands here, it's in the crosshairs.
The France-Thailand tax treaty: your (partial) shield
There's a bilateral tax treaty between France and Thailand, signed in 1974. It's an old text, not always crystal-clear, but it remains your best ally against double taxation.
Here's how it works in practice for the most common scenarios:
- Private pensions: taxable in the country of residence (so in Thailand if you live here 180+ days). But you can deduct tax already paid in France via a tax credit.
- Civil service pensions: taxable only in France. Thailand can't touch them.
- Rental income from France: taxable in France AND potentially in Thailand on the amount transferred, with a tax credit to avoid double taxation.
- Dividends: taxable in both countries, with a capped withholding tax rate at source.
- Real estate capital gains: taxable in France (where the property is located), but the amount transferred could be declarable in Thailand.
Warning: The 1974 treaty doesn't explicitly cover certain modern income types (online platform income, crypto, international freelancing). In these grey areas, Thai domestic law applies — and it's not in your favour. Consult a tax specialist in international law — not your mate who "knows a guy."
Thai tax brackets: not as scary as you think
A lot of expats panic without even looking at the rates. Here are Thailand's personal income tax brackets (in baht, per year):
| Income bracket (THB/year) | Tax rate | Approximate equivalent (EUR) |
|---|---|---|
| 0 – 150 000 | Exempt | 0 – 3,900 € |
| 150 001 – 300 000 | 5% | 3,900 – 7,800 € |
| 300 001 – 500 000 | 10% | 7,800 – 13,000 € |
| 500 001 – 750 000 | 15% | 13,000 – 19,500 € |
| 750 001 – 1 000 000 | 20% | 19,500 – 26,000 € |
| 1 000 001 – 2 000 000 | 25% | 26,000 – 52,000 € |
| 2 000 001 – 5 000 000 | 30% | 52,000 – 130,000 € |
| More than 5 000 000 | 35% | More than 130,000 € |
A French retiree pulling in 2,000 € a month who transfers everything to Thailand — that's roughly ฿936,000 per year. After the personal deduction of ฿60,000 and the first tax-free bracket, the Thai tax bill would come to around ฿80,000 to ฿90,000 (about 2,200 €). It's not nothing, but it's not the end of the world either — especially if you can offset what you've already paid in France.
The real problem is uncertainty. Nobody knows exactly how the Revenue Department is going to enforce these rules in practice. As of early 2025, the first audits are only just beginning. And my accountant tells me that even local officials don't always agree on the interpretation.
What the expats around me are doing (and what I'm doing)
In Bangkok, within my circle, I see four strategies playing out:
1. The ostriches. They change nothing and hope the Thai taxman never comes knocking. It's a gamble. With the CRS and the automatic exchange of banking information between France and Thailand, it's an increasingly risky one.
2. The minimisers. They cut transfers to Thailand to the bare minimum and lean more on French credit cards or ATM withdrawals. Heads up though: the Revenue Department has indicated that ATM withdrawals from a foreign account could be considered a transfer. The grey area is massive.
3. The optimisers. They work with a tax specialist to structure their income: identify what falls under the bilateral treaty, separate capital from income, document tax credits. That's what I do. It costs me about ฿35,000 a year in fees, but I sleep better at night.
4. The leavers. Some are seriously considering staying under 180 days in Thailand, splitting their time with Malaysia, Cambodia, or Vietnam. It's a drastic move, but mechanically it works: no tax residency, no Thai tax on foreign income.
Me, personally? I'm staying in Bangkok. My life is here — my apartment in On Nut, my routines, my friends. But I've seriously overhauled how I transfer my money. I document everything. Every Wise transfer, every currency conversion, every French tax payment receipt. If the Thai taxman knocks on my door, I want a clean file ready to go.
What I wish I'd known
If I could go back in time and talk to my 2023 self, here's what I'd say:
First, don't panic, but don't bury your head in the sand either. This change is real and it's not getting reversed. Thailand is moving toward greater tax transparency, just like every other ASEAN country.
Second, get an accountant who understands both systems — French and Thai. Not a local firm that files returns for small Thai businesses. A firm that's used to working with expats. I went through three before finding the right one. It's worth the investment.