Retiring in Thailand
Thailand: the tax picture for FIRE
Thailand taxes resident income on a progressive scale: the first THB 150,000 is exempt, and bands then step from 5% to a top rate of 35% on taxable income above THB 4,850,000. For a cross-border retiree the defining feature is the remittance basis: since a 2024 rule change (with easing proposals floated in 2025), foreign-source pension and investment income is taxed only if it is remitted to Thailand within the year. Individuals pay no capital-gains tax on financial assets, though Ember records that position with low confidence. At death, Thailand applies an inheritance tax — 10%, or 5% for direct ascendants and descendants — but only above THB 100 million, with spouses exempt.
Ember's cost-of-living factor for Thailand is 0.5, an illustrative, low-confidence figure. The Thailand income pack itself is a medium-confidence draft with clear limits: it omits Thai personal allowances, the over-65 exemption and the pension-income deduction (so it can overstate a retiree's bill), cannot express the remittance basis, and carries no coded UK-pension treaty method.
Income tax (2026)medium confidence
Tax-free allowance: THB 150,000 (then bands apply to income above it).
| Band (above allowance) | Rate |
|---|---|
| THB 0 – THB 150,000 | 5% |
| THB 150,000 – THB 350,000 | 10% |
| THB 350,000 – THB 600,000 | 15% |
| THB 600,000 – THB 850,000 | 20% |
| THB 850,000 – THB 1,850,000 | 25% |
| THB 1,850,000 – THB 4,850,000 | 30% |
| above THB 4,850,000 | 35% |
What this model doesn’t capture (7)
- remittance basis for foreign-source income (2024 rule change + 2025 easing proposals) — foreign pension/investment income is taxed ONLY if remitted to Thailand in the year; not expressible in a pure resident-band pack and materially affects non-remitting retirees
- the three core shields ARE modelled (Queue B4): 50%/THB 100k expense deduction on pension/employment income, THB 60,000 personal allowance, over-65 THB 190,000 exemption (needs a known age). STILL not modelled: spouse THB 60,000, insurance/provident-fund/RMF/SSF deductions, child allowances
- social security contributions (employee ~5% capped, monthly cap ~THB 750) not modelled
- inheritance tax (10%, or 5% ascendant/descendant, over THB 100m; spouse exempt) is a separate schedule, not modelled
- no wealth tax (correctly, none exists) and Thai SET capital gains exemption / property transfer taxes (2% transfer fee + SBT/stamp) not modelled
- no bracket indexing/inflation adjustment modelled — thresholds are static
- selfEmployment: no regime module — self-employed social contributions / business-income surcharges for this jurisdiction are not modelled
Capital gainslow confidence — approximate
No capital-gains tax on financial assets.
No CGT for individuals on financial assets.
Inheritance & estate taxhigh confidence
Tax is charged on each recipient, scaled by their relationship to the deceased.
Recipient-based inheritance tax under the Inheritance Tax Act B.E. 2558 (2015), effective 1 Feb 2016. THB 100,000,000 tax-free per heir (cumulative to one beneficiary), then a flat 5% on the excess for descendants/ascendants or 10% for all other beneficiaries; spouses are fully exempt (spouse class encoded as 0%). The 'child' class here covers the statutory descendant/ascendant group (children, grandchildren, parents); siblings fall in the 10% 'other' group.
When should you claim your Thailand state pension?high confidence
Thailand SSO Old-Age Pension (Section 33)
Normal pension age 55. There is no actuarial claiming-age lever — the amount doesn't change with when you claim.
No claiming-age lever: the SSO old-age pension pays at a fixed age 55 with a 15-year minimum contribution trigger, not an actuarial claim window. The 15-year eligibility requirement and the wage-based benefit formula (20% of the final-60-month average wage at 15 years, +1.5% per additional year, wage ceiling THB 17,500 from 1 Jan 2026) are not modelled. Covers mandatory private-sector employees only — most expat TH residents are not SSO contributors.
The best age to claim isn’t just about these factors — it depends on your life expectancy, your other income, and which country you’re tax-resident in when the money lands. Deferring into a lower-tax country can flip the answer entirely. Optimise your claim age →
Cost of living
50%
of a UK baseline (100%) — a rough, illustrative comparison, not a forecast.
UK private pension
Under the UK treaty, a UK-sourced private pension paid to a resident here is generally taxed only where you live (not by the UK).
Common questions
How are capital gains taxed in Thailand?
Ember's data records no capital-gains tax for individuals on financial assets in Thailand, though this entry carries low confidence. Property is treated separately — transfer taxes (a 2% transfer fee plus specific business tax or stamp duty) exist but are not modelled. Foreign-source investment income also interacts with the remittance basis: it is taxed only if remitted to Thailand within the year.
Will my UK pension be taxed in Thailand?
Under Thailand's remittance basis — a 2024 rule change, with easing proposals floated in 2025 — foreign-source pension income is taxed only if it is remitted to Thailand within the year, a point Ember's data flags as materially affecting retirees who keep income offshore. Remitted income falls into the progressive bands: the first THB 150,000 is exempt, with rates stepping from 5% to 35%. Ember's Thailand pack cannot express the remittance basis and has no coded UK-pension treaty method, so its modelled figures can overstate the bill of a non-remitting retiree.
Is there inheritance tax in Thailand?
Yes — Ember's data notes a 10% inheritance tax, reduced to 5% for direct ascendants and descendants, on amounts over THB 100 million, with spouses exempt. It is a separate schedule that Ember does not currently model; there is no coded estate pack for Thailand.
What does Thailand do to your FIRE date?
The free calculator compares your number across every covered country; the full planner models your actual accounts, pensions, residency moves and these exact tax rules — with the maths behind every figure shown.