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Thailand has no tax break that matches the UK's 25% tax-free pension lump sum. The 1981 UK–Thailand double tax convention has no article on private or state pensions, so both countries can tax the same payment. If you are a Thai tax resident when you bring the money in, Thai advisers treat it as assessable income, and Thailand credits only the UK tax actually paid on it — since the tax-free 25% carries no UK tax, there is nothing to credit against it. The Revenue Department has not published guidance specific to lump sums, so this rests on the general remittance rules and a ruling on foreign pensions, applied by analogy.
In short
- Thailand has no equivalent of the UK's 25% tax-free lump sum.
- The UK–Thailand treaty has no article on the private pension lump sum discussed here, so it does not divide the right to tax this payment; pensions for government service are covered separately.
- Thailand credits only UK tax you actually paid on the same income — never the tax-free part.
- A lump sum may be taxable under the general remittance rule once a Thai tax resident brings it in — the Revenue Department has published no guidance specific to lump sums.
- A drafted exemption for remitting income in the same year it is earned, or the year after, is still not law.
Why the UK relief doesn't carry over to Thailand
In the UK, you can normally take up to 25% of a pension pot tax-free, capped at £268,275. The rest is taxed as income, and the pension provider deducts the tax before paying it out. That 25% figure is a UK concept: it describes how much of a withdrawal escapes UK tax, not how the money is treated once it leaves the country.
Thai tax law asks different questions. It looks at whether you were a Thai tax resident in the year the income arose, whether you are a resident in the year you remit it, and whether the Revenue Code treats the payment as assessable income. None of that depends on how the payment is labelled when it leaves the UK. So the part that was tax-free in the UK does not automatically stay tax-free once it reaches a Thai bank account.
When a lump sum becomes taxable in Thailand
Two separate conditions decide this, and both need to be true. First, residency: you need to be a Thai tax resident — present 180 days or more in the calendar year — in the year you bring the money in. Second, remittance: under Revenue Department Instruction Por. 161/2566, in force since 1 January 2024, foreign income that arose on or after that date is taxable whenever it is remitted, in whichever year you were resident when it arose.
The companion Instruction Por. 162/2566 keeps two things outside this rule: income that arose before 2024, and income from years in which you were not a Thai tax resident. Savings built up before 2024 are generally treated the same way, as Thai advisers apply the instructions — the Revenue Department itself has not published a detailed explanation covering pension lump sums, so when exactly a withdrawal "arises" for this purpose, and whether an early contribution counts as savings rather than income, is not officially settled.
| Payment | UK side | Thai side, if remitted by a tax resident | Credit for UK tax |
|---|---|---|---|
| 25% tax-free lump sum (up to £268,275) | No UK tax withheld | Thai advisers treat it as assessable on remittance | None — no UK tax was paid on this part |
| Remaining 75% of the lump sum | Taxed as income, deducted by the provider | May be assessable on remittance under the general rule; no official guidance covers lump sums specifically | Credit for UK tax actually payable under the Convention, up to the Thai tax due on this income |
| UK State Pension | Check the UK tax treatment with HMRC | May be treated as a foreign pension under the general rule; the Revenue Department has not confirmed this for the State Pension specifically | Credit only if UK tax was in fact paid, up to the Thai tax due on this income |
What the UK–Thailand treaty says about pensions
The 1981 convention between the UK and Thailand sets out separate articles for most kinds of income, but it has none for private or state pensions. Without a pensions article, neither country gives up its right to tax the payment, so both can tax it.
Relief from double taxation comes from Article 23(3) of the Convention: Thailand credits UK tax you actually paid on the same income, not the UK tax you would have owed if the relief had not applied, and the credit cannot exceed the Thai tax due on that income. GOV.UK explains the tax-free part and the tax charged on the rest; the Revenue Department lists its treaties, including the UK one, on its double tax agreements page.
As a condition example only: say you draw £100,000, of which £25,000 is tax-free in the UK and £75,000 is taxed by your provider. If you remit the whole £100,000 as a Thai tax resident, the credit under Article 23(3) can only offset the UK tax paid on the £75,000 — there is no UK tax paid on the £25,000 to set against any Thai liability on it. This is an illustration of how the credit works, not a calculation of what you would owe in Thailand.
State Pension vs private schemes
The State Pension works differently from a drawn-down private pension, though the Revenue Department has not published guidance on how it is treated for Thai tax purposes specifically. The general rule for foreign pensions brought into Thailand by a tax resident — set out in Revenue Department ruling 0702/139 — is that the payment is taxable when remitted. Whether the Revenue Department applies this the same way to the State Pension specifically has not been confirmed in published guidance, so we treat it with care rather than certainty.
Two existing reliefs are worth knowing, though neither is written for lump sums. Holders of the Long-Term Resident (LTR) visa in the Wealthy Pensioner category have an exemption on foreign-sourced income under the BOI's own rules. Separately, a resident aged 65 or older can exempt up to THB 190,000 of income a year under a Revenue Department ruling — but whether that exemption reaches a remitted foreign pension has not been officially clarified, so we check it case by case rather than assume it applies.
Timing the transfer: tax year and the 180 days
Thai tax residency is counted by calendar year, from 1 January to 31 December, based on days physically present. Before 2024, a common piece of advice was to wait and remit foreign income in a later tax year, when it would escape Thai tax. That advice described the old rule; since Por. 161/2566 took effect on 1 January 2024, income arising from that date is taxable on remittance in whichever resident year you bring it in, so "wait a year" no longer works for income earned under the new rule.
What still matters is proving when the money arose and where it came from. We advise settling the question of timing before you draw the funds, not after you have already transferred them — once the money is in Thailand, the facts you can point to are the ones you kept. Hold on to your provider's statements, the dates of each payment, and your own travel records showing your days in Thailand each year; our team uses exactly these documents to work out which year and which rule apply to your transfer.
What to do next
Nothing here replaces checking your own numbers against the dates and residency years that apply to you. If you are planning to draw a UK pension and bring some or all of it into Thailand, send us your provider's statement and the transfers you are considering. Our lawyers will go through the timing, the residency position for the relevant years, and what the Article 23(3) credit can and cannot cover, in a paid consultation.
For the residency test itself, see the 180-day residency rule. For how remitted foreign income is taxed more generally, see our guide to tax on foreign income remitted to Thailand. Once you know a return is due, filing a Thai tax return covers the forms and the deadline. A typical situation with a similar mixed transfer — where part of what was remitted was taxable and part was not — is set out in our case on a remittance after 180 days. For a broader look at your situation, our tax advice for foreigners in Thailand page covers how we work and what a consultation includes.
