Sending money to Thailand: every transfer is a tax event

Most articles about sending money to Thailand compare transfer fees. That is the smallest part of the decision.

Since 2024, a transfer into Thailand is not just a payment. For a Thai tax resident it can be the event that makes income assessable — which means the questions worth asking are what you send, which year it lands in, and whether you can show what it was. Cost comes fourth.

What the 2024 rule actually did

Thailand taxes foreign income on a remittance basis: foreign-source income is outside the Thai net unless it is brought in. Under the old reading, income remitted in a later year than it was earned escaped assessment, and that gap was the whole game.

Order P. 161/2566 closed it for income brought into Thailand from 1 January 2024, and Order P. 162/2566 left out income earned before that date. Foreign-source income earned from 2024 and remitted into Thailand by a Thai tax resident is assessable in the year it arrives, whichever year it was earned. The mechanics are set out in full in Thailand’s 2024 remittance rule.

Three things did not change, and they matter as much as what did:

• The remittance basis survived. Income you never remit is still outside the Thai net.
• The 180-day threshold survived. If you are not a Thai tax resident in a given year, the remittance rule does not reach you that year. See the 180-day rule.
• Pre-2024 income was grandfathered by Order P. 162/2566. Money earned before the change did not become assessable because of it.

That last point is the one people quietly lose — not because the law is unclear, but because their bank accounts are.

The evidential problem nobody warns you about

The rule attaches to income. It does not turn your existing savings into income.

But you have to be able to show which is which. If your pre-2024 savings, your 2024 earnings and your 2026 earnings all sit in the same current account, and you transfer €30,000 from it, you have no clean answer to what you sent. The legal distinction survives; your ability to evidence it does not.

The fix is unglamorous and takes an afternoon: separate the accounts before you move. Capital accumulated before Thai tax residency in one place, current income in another, and transfer from the account that matches your intent.

Doing this before departure costs nothing. Doing it afterwards, from a position where every account is already commingled, ranges from painful to impossible.

Cost: the fee is not the cost

The visible transfer fee is usually the smaller half. The larger half is the exchange-rate margin — the gap between the rate you are given and the mid-market rate.

A bank advertising a low fee at a 2–3% margin is more expensive than a specialist charging a higher fee at a rate near mid-market. On €3,000 a month that difference is a meaningful annual number, and it is invisible unless you look for it.

The only comparison that means anything: send the same amount through two or three providers on the same day and see how many baht land. Everything else is marketing.

Two practical notes:

• ATM withdrawals are convenient and expensive at scale — a per-withdrawal fee for foreign cards, plus your own bank’s charge, plus its FX margin. They also generate a stream of small, poorly documented movements instead of clean dated transfers, which is worse for your records as well as your wallet.
• Ask what the receiving bank issues. Thai banks produce a credit advice for inbound foreign transfers, and a formal foreign exchange transaction document for larger amounts — the latter is also what you need if you ever buy property. Knowing which you get, and keeping it, costs nothing at the time.

Timing beats optimising

Because assessability attaches to the year of remittance, the calendar is a lever that fees are not.

A large discretionary transfer landing on 28 December and the same transfer landing on 3 January sit in different Thai tax years. If your income is uneven, or if a year is likely to fall below the 180-day residency threshold, which side of 31 December a transfer lands on can matter more than every fee you will pay that decade.

This is not a trick and it is not aggressive. It is simply that the rule has a date in it, and discretionary transfers have a date you choose.

What it is not is a reason to leave yourself short. The point is to decide the year deliberately for large, optional movements — not to defer money you need.

A pattern that works

Most of our members converge on roughly the same structure:

The single most common mistake is the opposite of all of this: routing every euro through one Thai account because it is simpler, and converting what should have been internal transfers into a remittance record.

Where this sits

Transfers are the operational face of the remittance rule, so they touch almost everything else. The account they land in is covered in the Thai bank account guide. The rule itself is in the 2024 remittance rule, the crypto-specific version in Thailand crypto remittance 2026, and the residency threshold that decides whether any of it applies to you in the 180-day rule.

To see the numbers on your own income, run the Thailand tax calculator.

If you want the account structure set up before you become Thai tax resident — which is the only point at which the separation is easy — book the free diagnosis call. Sequencing that ahead of the move is part of the engagement.