Thailand Offshore Income Tax 2026: Expat Guide

If you live in Thailand and draw income from abroad - pension payments, SIPP withdrawals, QROPS income, dividends, or capital gains - that money is now taxable in Thailand. The Revenue Department’s 2024 amendment, effective 1 January 2024, abolished the prior-year exemption that expats used for years to shelter offshore income. Any foreign income you remit into Thailand while residing there for 180 or more days in a calendar year is assessable, regardless of when you earned it. A survey of expats in Thailand found 55% have considered leaving over this change. The World Bank projects Thailand GDP growth at just 1.5-1.8% in 2026, the lowest in ASEAN and the weakest in three decades outside of crisis years. Here is what the rule covers, who it reaches, and what your options are.

Last updated: 28 July 2026

Key Takeaways

• Thailand now taxes all offshore income remitted by anyone residing 180+ days annually - this includes pensions, SIPP and QROPS drawdowns, dividends, and capital gains, regardless of when the income was earned.

• The prior-year income exemption was abolished effective 1 January 2024; the timing strategy of deferring income to a prior year no longer works.

• Thailand personal income tax runs from 5% to 35% on a progressive scale - material for expats drawing six-figure annual pension income.

• A double taxation treaty between your home country and Thailand may reduce liability, but only if your specific income type is covered and you have claimed formal Thai tax residency.

What Did Thailand’s 2024 Remittance Tax Amendment Actually Change?

Before 2024, Thailand taxed offshore income only if it was both earned and remitted in the same tax year. Income earned in Year 1 and held offshore until Year 2 could be remitted tax-free. Tens of thousands of long-term expats - British, French, German, Dutch - structured their drawdowns around this rule.

The Revenue Department removed it on 1 January 2024. All offshore income remitted into Thailand by a Thai tax resident is now assessable in the year it arrives, regardless of when it was generated. A SIPP withdrawal earned in 2022 and remitted in 2026 is taxable in 2026.

Why the Exemption Was Removed

The stated rationale was fairness: the old rule allowed offshore assets to accumulate indefinitely and then enter Thailand tax-free with a single calendar-year delay. The Revenue Department viewed this as an unintended loophole. The 2024 amendment closed it.

What “Remittance” Means Under Thai Law

Thailand taxes on a remittance basis rather than a worldwide basis. Money sitting in a foreign bank account is not taxable. The tax applies when funds arrive in Thailand, and the Revenue Department’s definition of “remittance” is broader than a bank transfer. It also captures using a foreign credit card for purchases in Thailand (the draw-down is treated as a remittance), loan repayments received in Thailand where the loan was funded from foreign income, foreign debit card transactions drawing on foreign-sourced funds, and cash brought across the border. Routine use of a UK, French, or European card for everyday Thai spending is, on this reading, a reportable remittance on every swipe. The distinction matters for planning.

Non-residents (fewer than 180 days in Thailand in the calendar year) are taxed only on Thai-sourced income, generally at a flat 15% withholding rate - the remittance rules above apply to tax residents only.

Which Types of Income Does This Tax Reach?

The Thai Revenue Code’s definition of assessable income is broad, and offshore income remitted by a 180-day-plus resident falls within it across most categories. The income types most relevant to European expats:

Pension income. SIPP withdrawals, QROPS income, Irish ARF distributions, French AGIRC-ARRCO payments, Dutch AOW state pension, German Riester and Ruprup drawdowns - all fall within assessable income if remitted into Thailand. Whether a double taxation treaty limits the Thai taxing right depends on the specific treaty article covering that pension type.

Investment returns. Dividends, interest, and capital gains distributions from portfolios held at foreign brokerages are taxable on remittance. A UCITS ETF portfolio at Interactive Brokers or a UK platform that generates annual dividends, transferred to fund living costs in Bangkok, triggers a taxable event on the full amount transferred.

Rental and property income. UK or EU rental income remitted to Thailand is assessable. Capital gains from a foreign property sale, sent to Thailand for retirement funding, fall within scope.

How Much Tax Would a European Expat in Thailand Actually Pay?

Thailand’s income tax is progressive: 5% on the first THB 300,000 of assessable income, rising to 35% on income above THB 5,000,000 annually. At current exchange rates, THB 5,000,000 is approximately GBP 109,000 or EUR 123,000. A senior expat drawing a GBP 80,000 annual SIPP moves into the top bands quickly.

A practical scenario: a British professional in Bangkok draws GBP 80,000 annually from a SIPP and remits it all to Thailand. The UK-Thailand double taxation treaty (signed 18 February 1981) has no article covering private pensions and no general “other income” article - Article 19(2) addresses government-service pensions only (civil service, NHS, teachers, police, military), which stay taxable solely in the UK. For private pension income, including SIPP drawdown, no treaty provision allocates taxing rights, so both the UK and Thailand may tax it under their own domestic law. Full detail, including the Article 23 credit-relief question, is covered on our UK-Thailand DTA page.

France and Germany sit differently. The France-Thailand DTA (signed 27 December 1974, in force 29 August 1975) does have a private pensions article, and it allocates taxing rights to the source state rather than the state of residence: Article 18 (“Pensions privées”) keeps a French private pension paid to a Thailand-resident expat taxable in France, not Thailand. Its catch-all “other income” article (Article 22) follows the same source-state logic - this treaty departs from the OECD residence-state default more broadly than a single pensions clause suggests. French social charges (CSG/CRDS at 9.2% for non-residents) sit outside the DTA and may still apply to investment income.

The Germany-Thailand DTA (signed 10 July 1967, in force 4 December 1968) draws a narrower line. Government pensions (Article 18(2)) are exempt from Thai tax outright. Private pensions (Article 18(1)) give Thailand taxing rights only in a narrow anti-avoidance carve-out - where the pension payment was deducted as a business expense by an enterprise or permanent establishment in Thailand. An ordinary German company or personal pension paid to a retiree in Thailand does not meet that condition, so Thailand has no default taxing right over it.

Three UK, French, and German-domiciled expats can face three different treaty outcomes on functionally similar pension income. The calculation is not simple. Seek specific advice for your pension type, your home country, and your treaty position before making large remittances.

Should You Leave Thailand?

If your income is predominantly offshore and your physical presence in Thailand is lifestyle-driven rather than employment-driven, the arithmetic for leaving has shifted materially. Thailand’s 2026 economic picture reinforces the case: GDP at 1.5-1.8% is the weakest in the region, a strong baht has hit export competitiveness, and US tariff drag is weighing on manufacturing employment.

Malaysia operates a territorial tax system with a specific exemption for foreign-source income received by individuals. Kuala Lumpur’s cost of living is lower than Bangkok for comparable residential quality. The MM2H programme offers long-stay visas at tiered asset thresholds. No tax on pension income remitted from the UK, EU, or global investment accounts.

Singapore charges no capital gains tax and does not tax most foreign-source income remitted by individuals under its territorial system. Higher cost of living, but strong legal infrastructure and predictable policy.

Indonesia offers the Second Home Visa (5-10 year term, USD 130,000 deposit or qualifying property purchase) with no income tax on offshore income. GDP growth forecast at 5.0% in 2026.

Relocation is one answer. For an expat with no employment obligation to Thailand, staying 180+ days is now a choice with a measurable tax cost.

What Can You Do If You Plan to Stay?

If staying in Thailand is the priority, the planning goal shifts to managing which income you remit and how it is structured.

Income segmentation by account. If your home country’s DTT with Thailand exempts one income category but taxes another, hold them in separate foreign accounts and remit only the exempt category to Thailand.

Days-of-presence management. Staying below 180 days in Thailand in a calendar year removes Thai tax residency entirely. A structured split between Thailand and Malaysia or Singapore can keep you below the threshold while preserving your Bangkok lifestyle.

The LTR visa exemption. Long Term Resident visa holders who qualify under the Wealthy Global Citizen or Wealthy Pensioner sub-categories get foreign-sourced remitted income exempted from Thai personal income tax outright, regardless of the 2024 remittance rule. For a high-income expat whose asset or income base clears the qualifying thresholds, this is the single most significant structural planning tool available. See our LTR visa financial planning guide for the category requirements and the numbers.

Pre-2024 accumulated funds. The Revenue Department has issued guidance suggesting that funds accumulated and held offshore before 1 January 2024 may not fall within the 2024 amendment’s scope. This interpretation remains contested. Do not rely on it without current professional advice.

Frequently Asked Questions

Does the 2024 amendment apply to income I earned before 2024 and kept offshore?

If you remit pre-2024 accumulated income into Thailand now while resident, the Revenue Department’s current guidance suggests this may still be assessable in the year of remittance. The rules on pre-2024 funds are unresolved - consult a Thai tax adviser before making large transfers from older offshore accounts.

Does a double taxation treaty fully protect me from Thai income tax?

No. DTTs reduce or eliminate double taxation by allocating taxing rights, but they do not make income non-taxable in both countries. Whether Thailand or your home country holds the primary taxing right depends on the specific treaty article covering your income type.

Does this affect my SIPP or QROPS pension income?

Yes. Pension income is assessable under the Thai Revenue Code. The relevant DTT may provide partial relief, but full exemption should not be assumed. Engage a tax adviser who understands both your home country’s pension rules and Thailand’s treaty interpretation.

What counts as “remitting” income into Thailand?

Any wire transfer to a Thai bank account, any payment to a Thai entity using offshore funds, or cash physically brought into the country. Income sitting in a foreign account that never crosses into Thailand is not taxable.

If I reduce my stay to fewer than 180 days per year, does the tax disappear?

Yes, for that tax year. If your total days in Thailand are below 180, you are not a Thai tax resident and the offshore income tax does not apply. Many expats now structure their year with extended stays in Malaysia, Singapore, or Europe to stay below the threshold.

Can I use a Thai company to receive offshore income and avoid the remittance tax?

Receiving income into a Thai company changes the tax category but does not eliminate it. The company pays 20% corporate income tax on assessable income. Salary or dividends you then draw are taxable again at personal rates.

Where can I get advice specific to my treaty position and pension type?

The answers above are general. Your actual liability depends on your home country’s treaty with Thailand, your pension or investment structure, and your remittance timing. Book a portfolio and tax-position review before making a large remittance into Thailand.

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This content is for informational purposes only and does not constitute personalised financial, investment, or tax advice.