Tax residence is a day-count test
Verified 1 August 2026. Section 41 of the Revenue Code, the Revenue Department's current foreigner tax infographic and its English and Thai foreign-income guides use 180 days or more in a calendar year. Some older overview wording says “more than 180 days”, but the statute and newer subject-specific material establish that exactly 180 days meets the domestic residence test. Nationality and visa label do not replace the day-count test.
Domestic residence and treaty residence are separate tests. Reaching Thailand's domestic 180-day threshold does not by itself settle residence under a double-tax agreement. The Revenue Department's current foreign-tax-credit manual says treaty residence may differ and must be considered separately before relying on treaty benefits or an ordinary foreign tax credit.
Foreign-source income: what the current order covers
The Revenue Department's official guide to foreign-source income and foreign tax credits explains Departmental Instruction P.161/2566 and P.162/2566. As verified on 1 August 2026, foreign-source income is within the current rule when both conditions apply:
- the person was a Thai tax resident in the calendar year in which that foreign-source income arose; and
- that income is brought into Thailand, whether in the same year or a later year.
Instruction P.162 limits the change to foreign-source income arising from 1 January 2024. The official guide therefore does not support the old statement that all money remitted after that date is taxable regardless of when it was earned. Whether a particular receipt is assessable income, capital, exempt income or treaty-protected depends on its facts and records.
No enacted remittance safe-harbour found
As of 1 August 2026, no Revenue Department order or Royal Gazette instrument establishing a general 12-month or two-year offshore holding safe-harbour was located in the official material reviewed for this page. Media reports about possible changes are not presented here as law. The published P.161/P.162 framework remains the official basis cited by the Revenue Department.
Published personal income-tax rates
As published in the Revenue Department rate table and checked on 1 August 2026, these are the marginal bands for net taxable income:
| Net taxable income (THB) | Marginal rate |
|---|---|
| 0 – 150,000 | 0% (exempt) |
| 150,001 – 300,000 | 5% |
| 300,001 – 500,000 | 10% |
| 500,001 – 750,000 | 15% |
| 750,001 – 1,000,000 | 20% |
| 1,000,001 – 2,000,000 | 25% |
| 2,000,001 – 5,000,000 | 30% |
| 5,000,001 + | 35% |
Deductions, allowances, exemptions and tax credits are separate calculations. This page does not infer a zero-tax result from the amount remitted.
LTR benefits have statutory conditions
Royal Decree No. 743 provides a foreign-source-income exemption for qualifying persons in the Wealthy Global Citizen, Wealthy Pensioner and Work-from-Thailand Professional LTR categories, subject to the decree's conditions. It also provides a 17% rate for specified assessable employment income of qualifying Highly Skilled Professionals, subject to the decree.
As of 1 August 2026, the BOI LTR laws and regulations page still publishes the decree. Holding a visa with a different label does not by itself determine the tax treatment of every receipt, and this page does not treat LTR status as a blanket exemption from all Thai tax.
LTR TAX BENEFIT SCOPE RECHECKED 29 AUGUST 2026
Foreign tax credit and treaty questions
The Revenue Department's current foreign-tax-credit manual says an ordinary foreign tax credit may be available under a double-tax agreement and is limited by the agreement and Thai tax calculation. It also states the opposite boundary plainly: if the source country has no DTA with Thailand, the ordinary foreign tax credit described by the manual cannot be claimed for that foreign-source income. The result still depends on the income type, source country, tax actually paid, treaty wording and supporting evidence.
A claim about a named pension, social-security payment, credit-card transaction or property purchase cannot safely be made from the remittance rule alone.
How to calculate and document a foreign tax credit
Answer first: the Revenue Department's foreign tax credit calculation tool is a filing aid for individuals preparing P.N.D.90 or P.N.D.91. Its output is not a tax assessment and does not decide whether a particular receipt is taxable or treaty-protected.
Checked 29 August 2026. The Department's foreign-income and tax-credit manual and evidence infographic require the calculation to be separated by source country and income type. The allowable credit is capped at the Thai tax attributable to that foreign income. Excess foreign tax cannot be carried forward, and foreign penalties or surcharges are not included as creditable tax.
For the conversion used in this calculation, the manual allows either a commercial bank's buying rate on the remittance date or the Bank of Thailand's average buying rate announced at the end of the preceding business day. Keep the chosen rate, date and source with the calculation; do not substitute an undated converter result.
Retain the records behind the claim, including the relevant foreign return, foreign withholding-tax certificate, proof of tax payment or official tax receipt, and remittance evidence. Then check the applicable country agreement in the Revenue Department's double-tax-agreement list. These records support a filing position; they do not guarantee the Department will accept a personal conclusion.
FOREIGN-INCOME AND TAX-CREDIT MECHANICS RECHECKED 29 AUGUST 2026
Filing dates and forms
As checked on 1 August 2026, Section 56 and the Revenue Department's filing calendar set the ordinary annual personal-income-tax return deadline at the last day of March following the tax year. The current English forms page publishes the tax-year 2025 P.N.D.90 and P.N.D.91 materials. A separately announced electronic-filing extension can vary by year.
Whether a person must file, which form applies and what evidence supports a foreign tax credit are tax-administration questions for the Revenue Department or a suitably qualified tax professional. This guide supplies the published rule and sources, not personal tax advice.
FAQ
Is every transfer into Thailand taxable?
No. The current official guide applies tests including residence in the year the foreign-source income arose, the nature and date of that income, and remittance to Thailand. Capital, exempt income and treaty treatment require their own analysis.
Does the current rule reach income earned before 2024?
Revenue Department Instruction P.162 states that the P.161 interpretation applies to foreign-source income arising from 1 January 2024. The English and Thai official guides reviewed on 1 August 2026 reflect that limitation.
Does a visa determine tax residence?
No. The Revenue Department uses a calendar-year day-count test for domestic residence, while residence under a double-tax agreement can differ and must be assessed separately. Visa status can be relevant to a specific statutory benefit, such as qualifying LTR treatment, but it is not the general residence test.
Is foreign tax automatically credited in full?
No. The Revenue Department guide says the ordinary credit depends on an applicable double-tax agreement and is limited by the relevant Thai tax calculation. It says the ordinary credit cannot be claimed for foreign-source income from a country with no DTA with Thailand. Documents and income classification still matter.
Can unused foreign tax credit be carried forward?
No. The Revenue Department's current foreign-tax-credit manual says excess foreign tax cannot be carried forward. The allowable credit is capped at the Thai tax attributable to the foreign income, calculated separately by source country and income type.
Which exchange rate can be used for a foreign tax credit calculation?
The Revenue Department manual allows either a commercial bank's buying rate on the remittance date or the Bank of Thailand's average buying rate announced at the end of the preceding business day. Keep evidence of the rate, date and source used.
Related guides
- LTR Visa — Royal Decree 743 (The tax-exempt option)
- Privilege vs LTR — programme and tax-treatment differences (Verify current official criteria)
- DTV vs LTR — When the LTR fee pays back (For mid earners)
General information enquiry