Thailand tax on foreign income: residence, remittances and exemptions

A transfer into Thailand is not automatically taxable income. You first need to establish what the money represents, where the income arose, when it arose, your Thai tax residence in that year, and whether an exemption or tax treaty applies.

For foreign-source assessable income arising from 1 January 2024, the Revenue Department's published interpretation generally requires inclusion in the year it is brought into Thailand if you were Thai tax resident in the income year. Waiting until a later year does not, by itself, remove that obligation.

This guide was checked on 21 October 2026 against Revenue Department legislation and guidance. It concerns individuals, including foreign nationals and returning Thai nationals. It is a framework for preparing your records and identifying questions for a qualified Thai tax adviser, not an individual tax determination.

Before moving money: a five-step decision

1. Name the funds using underlying records: prior savings/principal, returned investment, wages, rent, interest, dividends, a genuine gift or something else. A bank's transfer label is not a tax exemption.
2. Check source and income year. Work physically performed in Thailand may be Thai-source even if paid abroad. For genuinely foreign-source income separate pre-2024 amounts from income arising during 2024 and later.
3. Count Thailand days in the income year. The domestic test is 180 days or more within that calendar year; your visa or residence in the later remittance year is not a substitute.
4. Trace remitted components. Match principal and earnings to transaction evidence and the actual remittance year. Neither a mixed account nor waiting until January creates an automatic exemption.
5. Identify actual relief and reporting. Check the precise statutory gift/inheritance or LTR rule, tax treaty, allowable foreign tax credit and relevant filing year. For an untraceable component, do not declare it tax-free without evidence: bring the records to the Revenue Department or a qualified adviser.

Example: One transfer contains documented investment principal plus foreign dividends earned while Thai-resident in 2025. Separate them, determine which components arose when and when they entered Thailand, then check any relief and the correct return year. Do not assume the entire bank transfer is all taxable or all exempt.

Start with the money, not the transfer description

Three amounts can be different:

• Money transferred: the total that arrives.
• Assessable income: the portion falling within a taxable income category, after identifying any applicable exemption.
• Tax payable: the result of the relevant calculation, including permitted expenses, allowances and credits.

A bank's description such as “savings”, “family support” or “property purchase” does not resolve those questions. Nor does transferring between accounts in your own name.

Use this order:

Tax residence: 180 days counts, and the calendar year matters

Section 41 of the Revenue Code sets the domestic test at 180 days or more in a tax year, accumulated across one or several stays. For individuals, the tax year is the calendar year.

Exactly 180 days qualifies. This is not a rolling 12-month test, and leaving Thailand does not reset the year's accumulated days. A visa, immigration report or permanent-residence status does not replace the day count.

For example, 100 days in Thailand late in one year and 100 early in the next do not, alone, reach 180 in either year. Two separate 100-day visits within the same year do.

Check residence in the year the foreign income arose. The Revenue Department's foreigner guidance, pages 2–4, distinguishes income earned during a resident year from foreign income earned while nonresident and remitted later. Becoming resident later does not automatically make earlier nonresident-year foreign income taxable.

Conversely, do not assume that being abroad when you eventually remit resident-year income erases the liability. P.161 refers to remittance in any subsequent tax year. A change of residence may also complicate treaty entitlement; obtain a case-specific answer before relying on it.

For a move during a year, calculate the whole year's presence before treating pre-arrival earnings as “earned while nonresident”. Do not invent a day-by-day exemption or automatically split the tax year at your moving date.

Foreign-paid work is not necessarily foreign-source income

Section 41 has separate rules for Thai-source and foreign-source income. Income from work performed or business carried on in Thailand, a Thai employer's business, or property in Thailand can fall within the Thai-source rule even when payment is made overseas. The foreign-income remittance test does not replace that rule.

A remote worker in Bangkok should therefore resolve the source of earnings before asking whether leaving their salary in a foreign account avoids Thai tax. Working for overseas customers, receiving foreign currency and holding a DTV are not conclusive answers.

Treaties can restrict Thailand's taxing rights in qualifying cases, but a treaty's employment day-count exception is a separate test with other conditions. It is not a replacement for the domestic 180-day residence threshold.

Keep immigration and tax planning separate. Our working and longer stays guide and LTR–DTV comparison address the status and work-permission questions.

What changed from 2024?

Order P.161/2566, dated 15 September 2023, directs Revenue officials on Section 41(2). For covered foreign income earned in a Thai-resident year, remitting it in that year or a later year brings it into the Thai tax calculation for the remittance year.

Order P.162/2566, dated 20 November 2023, excludes income arising before 1 January 2024 from that new interpretation.

The practical consequences are:

• Keeping covered 2024-onward foreign income overseas until the following January does not create an exemption.
• Foreign income earned before 2024 and brought in during a later year is outside the new rule.
• For genuinely foreign-source income, the published rule still depends on bringing the income into Thailand. It is not, by itself, a tax on all unremitted worldwide income.
• Do not treat the date an account opened, an investment was bought or money was transferred between foreign accounts as necessarily the date income arose.

An account held since 2020 can contain both old savings and interest earned in 2026. A pre-2024 investment can produce a new dividend or a gain realised after 2023. Identify those components separately.

Savings, principal, gains, gifts and loans

The Revenue Department's Section 41 Q&A explicitly distinguishes returned investment money from income. Its examples include money sent abroad for investment and returned, and a foreign deposit's principal versus its interest.

A mixed account needs a traceable explanation

The Q&A tells taxpayers to determine, from the facts, whether remitted money is investment or assessable income. It does not give a universal rule allowing everyone to select “principal first” or automatically withdraw the oldest money first.

Practical preparation: keep a reconciliation of opening capital, later contributions, income, sales and withdrawals. Separate accounts may make the evidence easier to follow, but moving taxable earnings into a different account does not change their origin. Ask an adviser to document the allocation if the records cannot identify the remitted component.

Gifts and inheritances have their own boundaries

The current Thai text of Section 42 provides specific personal-income-tax exemptions:

• Section 42(10): income received by inheritance. This does not settle any separate inheritance-tax obligation or exempt later income generated by inherited assets.
• Section 42(27): maintenance or gifts from an ascendant, descendant or spouse, up to THB 20 million in the tax year.
• Section 42(28): qualifying maintenance under a moral obligation, or gifts on customary ceremonial occasions, from other persons, up to THB 10 million in the tax year.

The latter is not an unrestricted THB 10 million exemption for every payment from a friend. Establish the donor, relationship, genuine purpose and annual total. These are not general tax-free remittance allowances, and routing your own earnings through someone else does not establish a qualifying gift.

A claimed loan requires proof

This guide does not offer a blanket exemption for transfers labelled “loan”. An RD-published Supreme Court decision, 21883/2555, upheld assessment of deposits where the taxpayer failed to substantiate the claimed loan origin.

If your transfer genuinely concerns borrowing or repayment, prepare the agreement, disbursement trail, repayment obligations and a separation of principal from interest. Have the transaction classified on its actual facts. That historical case supports the need for evidence; it is not a general ruling approving every cross-border loan arrangement.

Six examples: what needs to go into the tax review?

These are simplified illustrations, not tax calculations. Assume no special exemption or treaty relief unless stated.

The Q&A's remittance examples include bank transfers, online transfers and bringing cash into Thailand. Do not assume that avoiding a Thai bank account necessarily avoids bringing income into the country. For foreign-card spending or indirect payment arrangements, obtain a transaction-specific answer; this guide does not establish a universal exclusion.

For partial remittances, identify how much of the relevant income came in. Do not claim a credit for all foreign tax paid on a much larger income amount without checking the corresponding allocation.

Treaties: “already taxed abroad” is not the final answer

Use the Revenue Department's treaty directory to locate the agreement for the relevant country. Confirm that it is in force and effective for the year concerned, including any applicable protocol or modification.

The analysis needs to identify:

1. Treaty residence. Being resident under two countries' domestic rules may require the treaty's tie-breaker.
2. The correct income article. Employment, dividends, rent, private pensions, social security and government-service pensions may receive different treatment.
3. Which country may tax. Exclusive taxing rights differ from a provision allowing both countries to tax.
4. The relief mechanism and limits. Check credit entitlement, tax covered, evidence and any restrictions.

As an illustration, Article 4 of the US–Thailand treaty uses permanent home, centre of vital interests, habitual abode and nationality in its individual tie-breaker sequence, with competent-authority resolution if necessary. That is not simply another 180-day calculation.

Pension payments are not interchangeable

US–Thailand treaty Article 20(2) reserves taxation of qualifying US Social Security payments to the United States. Ordinary past-employment pensions fall under Article 20(1), subject to the government-service pension provision. US citizenship taxation also requires the treaty's Article 1 saving clause and its exceptions to be read.

The same treaty also has a remittance-based restriction in Article 18(6) on relief granted by the source country, including timing conditions. That provision is not a general Thai exemption for remitting income within two years.

This is a specific treaty illustration, not an exemption for all overseas pensions. Government-service pensions require Article 21, including its residence/nationality exception. Do not extend one country's result to another country's pension, a retirement-account withdrawal or an investment product.

Foreign tax credits can leave Thai tax to pay

A credit reduces tax; it does not automatically remove income from the return. Under US–Thailand Article 25, for example, qualifying US tax can be credited against the Thai tax attributable to that income, within the specified limits.

The Department's November 2025 credit-tool manual explains treaty-dependent entitlement, credit limits and supporting evidence. It does not provide a general personal foreign-tax credit where no DTA exists.

Illustration: if the correctly calculated Thai tax attributable to an income item is THB 30,000 and its allowable foreign credit is THB 18,000, THB 12,000 remains. A larger foreign payment does not automatically create a Thai refund.

Check the income category, source country, treaty tax-rate ceiling, partial-remittance allocation and payment evidence. Foreign penalties and surcharges are not qualifying income tax for this credit. Complicated timing differences deserve individual review.

Specific exemptions do not belong to every long-stay visitor

LTR: three categories have a foreign-income concession

Royal Decree 743, Section 5, provides a concession for qualifying overseas employment, business or property income brought into Thailand by LTR Wealthy Global Citizens, Wealthy Pensioners and Work-from-Thailand Professionals.

The holder must satisfy the relevant requirements. Income Tax Notification 427 requires the appropriate LTR visa and compliance with BOI conditions. Royal Decree 743 removes the concession for a tax year in which the applicable conditions are not met.

The separate 17% regime concerns qualifying Highly Skilled employment income and has additional requirements. It is not a flat tax for all expats, nor does the foreign-income concession automatically cover every LTR category or dependant. DTV and ordinary retirement visas are not the three categories named in Section 5.

See our LTR–DTV comparison and retirement options for the separate immigration decisions.

Digital-asset relief is narrowly defined

Ministerial Regulation 399, published on 5 September 2025, exempts qualifying gains above investment cost from specified cryptocurrency or digital-token transfers through exchanges, brokers or dealers licensed under Thailand's digital-asset business law, for income received 1 January 2025–31 December 2029.

That period includes 2026. It is not a blanket exemption for all foreign-platform crypto profits, staking income or any money later remitted to a Thai bank. Establish the transaction and licensed-operator conditions before applying it.

What is actually verified for 2026?

The materials checked for this guide do not establish a blanket exemption for remitting foreign income in the year it arose or the following year. Do not base a transfer or return on such a claim without the operative legal instrument, commencement date and qualifying conditions. A proposal, announcement of an intention or a calculator is not that instrument.

The concrete developments relevant to this guide are:

The Department's current Q&A even illustrates foreign-share gains realised in 2025 and remitted in 2026 being included for 2026. The article's verification date is not a claim that every rule mentioned was newly enacted in 2026.

Prepare a remittance file before you file a return

A useful working record has one row per identifiable income component:

This is a practical recordkeeping template, not a claim that every item must be attached to every return. Preserve both the income trail and the reason for excluding money.

For foreign-tax-credit evidence, the Department's foreigner guidance calls for Thai or English documents and recommends a tax-payment certificate from the foreign authority. Confirm how other-language documents should be translated for your filing.

Use the official credit manual's exchange-rate instructions when converting the relevant amounts to baht. It permits the commercial-bank rate on the remittance date or the Bank of Thailand reference rate at the end of the preceding business day. Keep the rate and calculation you used.

Filing: the tax year is not the filing year

Under Section 56, the ordinary annual return deadline is the last day of March following the tax year. Thus 2026 income/remittances reportable for 2026 normally belong to the return due by 31 March 2027, subject to any applicable officially announced extension. Do not assume an online extension before verifying it.

For an individual, the general annual filing thresholds are assessable income over THB 60,000 if unmarried, or THB 120,000 for married taxpayers' combined income. Where income consists only of Section 40(1) income, the corresponding thresholds are THB 120,000 and THB 220,000, with the latter applying to combined spousal income. These are filing thresholds, not tax-free transfer limits; expenses, allowances and credits may leave no tax due while a return is still required.

P.N.D.91 is for Section 40(1)-only income; P.N.D.90 covers other/general income cases. These linked guides explain the form distinction for 2024; they are not instructions for 2027 filing dates. Select by the income's legal category, not by whether it arrived from abroad. Check the relevant year's official instructions and foreign-income attachment.

For income under Sections 40(5)–(8), such as rent or business income, Section 56 bis also provides a half-year filing regime. Check its application to your receipts and timing; do not assume every case can wait until the annual return.

Before a substantial transfer, especially for a home purchase or long-term move, resolve any uncertain source, mixed-fund allocation, loan/gift character, pension classification or treaty position. Budget the resulting tax separately from living expenses using our Thailand money guide. A clear explanation supported by records is more useful than a reassuring label on the transfer.