Thailand Foreign Income Remittance Tax: What Actually Applies in 2026

Last updated on août 1, 2026

The rule that governs your 2026 transfers

Thailand taxes foreign-sourced income on a remittance basis. Two conditions must both be met before the Revenue Department can tax money you bring in. You must be a Thai tax resident in the year the income arises, and the money must enter Thailand. Miss either condition and the charge does not arise.

Section 41 of the Revenue Code sets the residence test at 180 jours ou plus dans une année civile. The count is cumulative, not continuous. Twelve separate trips of sixteen days each will make you resident just as surely as one long stay. If you are working out where you stand across several countries, our guide to Impôt sur le revenu des personnes physiques en Thaïlande sets out how the threshold interacts with treaty tie-breakers.

What Por. 161/2566 changed

Before September 2023, a well-known planning technique existed. Foreign income brought into Thailand in a later calendar year than the year it was earned escaped Thai tax entirely. Earn in 2022, remit in 2023, pay nothing. Practitioners called it the deferral rule, and it was the backbone of most expat tax planning in Thailand.

Departmental Instruction Por. 161/2566 ended it. The Revenue Department reinterpreted Section 41 so that foreign income earned by a Thai tax resident becomes assessable whenever it is remitted, regardless of which year it arrives. The timing gap closed. The instruction applies to remittances from 1 January 2024.

One point is routinely misunderstood. A departmental instruction is not a new tax. It is the Revenue Department stating how it reads existing statute. The charging provision is still Section 41. That distinction matters if you ever need to argue your position, because the department’s reading binds its own officers but does not bind a court.

What Por. 162/2566 protects

A second instruction, Por. 162/2566, carved out a significant protection. Income earned avant 1 January 2024 falls outside the new interpretation. Remit it whenever you like and the reinterpretation does not reach it.

This makes the boundary between pre-2024 and post-2024 wealth the single most valuable line in your financial records. It is also the line most people cannot evidence when asked, because they never expected to be asked.

The exemption everyone is waiting for is not law

Since mid-2025 the Revenue Department has signalled a relaxation. The concept is straightforward. Foreign income remitted in the same calendar year it is earned, or in the year immediately following, would be exempt. Earn in 2026, remit in 2026 or 2027, pay nothing.

It is a genuine proposal from a real source. It is also, as at 1 August 2026, not law.

Thai tax instruments follow a fixed path. A draft must clear Cabinet, pass Council of State review, and then appear in the Gazette royale. Publication is what makes it binding, and publication has not happened. Until it does, nothing about your liability has changed.

Be careful with what you read elsewhere. A great deal of commentary describes this measure in the present tense, as though it already governs. It does not. Treat any article that fails to name the gazettal date with suspicion, because there is no gazettal date to name.

Announced, approved, in force: three different things

Scène	What it means	Does it change your tax bill?
Announced or proposed	A department states an intention. Press reports follow.	Non
Cabinet approved	Government agrees to proceed. Drafting and Council of State review follow.	Non
Published in the Royal Gazette	The instrument becomes binding on its stated effective date.	Oui

Before and after: what the 2024 shift actually did

Understanding thailand foreign income tax

Situation	Until 31 Dec 2023	From 1 Jan 2024 (current)
Income earned abroad in year 1, remitted in year 2, you are Thai tax resident in both	Not taxable	Taxable on remittance
Income earned abroad and remitted in the same year	Taxable	Taxable
Savings accumulated before 1 January 2024	Not taxable	Not taxable (Por. 162/2566)
Income earned in a year you were in Thailand under 180 days	Not taxable	Not taxable
Money that never enters Thailand	Not taxable	Not taxable

What this means in practice

Retirees

A pension remitted monthly is foreign income arriving in Thailand. Whether Thailand may actually tax it depends on the double tax agreement between Thailand and the country paying it. Several treaties assign taxing rights over government-service pensions exclusively to the paying state. Others do not. Read your specific treaty rather than a general summary, and factor the answer into the budget set out in our guide to the cost to retire in Thailand.

Remote workers

Income you earn while physically working in Thailand is Thai-sourced, and it is taxable whether or not it ever reaches a Thai bank. This catches people who assume an offshore employer and an offshore account keep them outside the system. It does not. If you are structuring a long stay around remote work, read this alongside our note on Destination Thailand Visa requirements, because immigration status and tax residence are decided separately and one does not determine the other.

Property buyers

Funds remitted to buy a condominium are frequently pre-2024 capital, which Por. 162/2566 protects. The difficulty is evidential, not legal. Thai banks issue a Foreign Exchange Transaction form on inbound transfers above the reporting threshold, and you need that form anyway to register foreign-quota ownership. Keep it filed with your dated pre-2024 statements. Our guide to moving money to Thailand from abroad covers the mechanics, and achat d'un condominium en Thaïlande explains why the same paperwork does double duty at the Land Office.

Investors holding digital assets

Gains on digital assets follow their own rules and interact with the remittance question in ways that catch people out. See cryptocurrency tax in Thailand before you move exchange balances onshore.

Five steps to take before your next remittance

1. Count your days honestly. Use entry and exit stamps, not memory. The 180-day line decides everything else.
2. Download statements dated 31 December 2023 for every foreign account. This is the evidence that makes Por. 162/2566 usable.
3. Stop commingling. Keep pre-2024 capital in accounts you do not pay new income into.
4. Read your double tax agreement, not a summary of it. Relief is usually a credit, not an exemption, and you generally have to claim it.
5. Register for a Thai tax ID if you are resident and remitting. See registering a tax ID number in Thailand. Filing without one is not possible, and the absence of one is not a defence.

Thai personal income tax runs on progressive rates to a top marginal rate of 35 percent, and returns for a calendar year are filed in the following January to March window. Deliberate non-declaration is a separate and more serious matter, as our page on tax evasion and money laundering in Thailand explains.

Related regulatory shifts

Two other changes are moving at the same time and affect many of the same people. Thailand’s visa exemption framework is being cut back, which changes how long you can stay without a visa and therefore how easily you cross the 180-day tax line. See our companion article on the 2026 visa rule changes. Separately, proposals to raise the foreign condominium quota continue to circulate without becoming law, covered in our piece on the restrictions sur la propriété étrangère that still apply.