How to Estimate Your Thai Tax as an Expat (Worked Examples)

How to Estimate Your Thai Tax as an Expat (Worked Examples)

Thailand taxes net income on a progressive scale from 0% to 35% across eight brackets, and the first ฿150,000 is always tax-free. Stack the standard personal allowance (฿60,000), a spouse allowance (฿60,000) and the over-65 exemption (฿190,000), and a retiree can often remit close to ฿500,000 a year (~$15,150) before owing a single baht. This page walks through the brackets, the allowances that shrink your bill, and two full worked examples: a retiree living on a pension and a remote worker remitting freelance income. It is a calculation guide, not tax advice, and every case has enough nuance that a real Thai accountant is worth the fee before you file.

Quick answer: the numbers that matter

• Brackets: 0% up to ฿150,000, then 5/10/15/20/25/30/35% in rising steps, topping out above ฿5,000,000
• Personal allowance: ฿60,000; non-earning spouse: +฿60,000; each child: +฿30,000
• Over-65 exemption: ฿190,000 of assessable income, on top of the personal allowance
• Employment/pension expense deduction: 50% of income, capped at ฿100,000
• Retiree shield (stacked): personal + over-65 + expense deduction + zero band ≈ ฿500,000 before tax is due
• You only owe this at all if you are a tax resident (180+ days in Thailand) and you remit the money into the country

The 2026 progressive tax brackets

Thailand's personal income tax applies to net assessable income — income after allowances and expense deductions are subtracted, not your gross remittance. The brackets have not changed for 2026.

Source: PwC Thailand Worldwide Tax Summaries · verified July 2026 · ฿33/USD.

The tax is marginal: only the slice of income inside each bracket gets taxed at that bracket's rate. A person with ฿550,000 of net income doesn't pay 15% on the whole amount — they pay 0% on the first 150,000, 5% on the next 150,000, 10% on the next 200,000, and 15% only on the final 50,000.

Allowances and deductions that shrink the taxable number

Before you touch the brackets, you subtract allowances from your assessable income. These are the ones that matter most to expats:

Source: PwC Thailand "Deductions"; Sherrings Personal Tax Deductions and Allowances · verified July 2026 · ฿33/USD.

The expense deduction is the one people miss. If your remitted money is classified as employment or pension-type income (Section 40(1) of the Revenue Code), you deduct 50% of it before allowances, up to a ฿100,000 ceiling. Freelance, consulting and business income are classified differently and the rules vary by category — a grey area where the right classification changes your bill. Confirm your income category with a Thai accountant before relying on a specific deduction.

Worked example 1: the retiree living on a pension

Somchai — a 67-year-old US retiree in Chiang Mai — remits ฿900,000 a year (~$27,300) from a private 401(k)/IRA pension. Under the US-Thai double tax agreement, private pension income is taxable where you reside, so it is assessable in Thailand when remitted (unlike US Social Security or government pensions, which stay US-only taxable — see the DTA breakdown for US, UK and Australian retirees).

His allowances: ฿60,000 personal + ฿190,000 over-65 exemption + ฿100,000 pension expense deduction (capped) = ฿350,000 in deductions.

• Net taxable income: ฿900,000 − ฿350,000 = ฿550,000
• 0% on the first ฿150,000 = ฿0
• 5% on ฿150,001–300,000 = ฿7,500
• 10% on ฿300,001–500,000 = ฿20,000
• 15% on ฿500,001–550,000 = ฿7,500
• Total tax owed: ฿35,000 (~$1,060) — an effective rate of about 3.9% on the full amount remitted

That ฿35,000 is a modest bill against ฿900,000 of income — an effective rate under 4% — because ฿350,000 in allowances plus the ฿150,000 zero-rate band covers exactly the ground that shields a typical over-65 retiree. See do retirees pay Thai tax on pensions for how this plays out across pension types, and note this only applies once you cross the 180-day tax residency threshold — under that, remittances aren't assessable at all that year.

Worked example 2: the nomad remitting freelance income

Jess is a 34-year-old remote consultant on a long-stay visa, tax-resident for 200+ days in 2026. She remits ฿1,200,000 (~$36,400) of consulting income earned and invoiced in 2026 — assessable under the current Por 161/162 rules regardless of which year she eventually spends it, because it was earned after 1 January 2024.

Assume her income is taxed on the same 50%-capped-at-฿100,000 expense deduction basis as employment income (illustrative — her actual deduction category depends on how the income is classified, and this is worth confirming with an accountant):

• Allowances: ฿60,000 personal + ฿100,000 expense deduction = ฿160,000
• Net taxable income: ฿1,200,000 − ฿160,000 = ฿1,040,000
• 0% on first ฿150,000 = ฿0
• 5% on ฿150,001–300,000 = ฿7,500
• 10% on ฿300,001–500,000 = ฿20,000
• 15% on ฿500,001–750,000 = ฿37,500
• 20% on ฿750,001–1,000,000 = ฿50,000
• 25% on ฿1,000,001–1,040,000 = ฿10,000
• Total tax owed: ฿125,000 (~$3,790) — an effective rate of about 10.4%

Jess's bill is proportionally heavier because she has no over-65 exemption or spouse allowance to lean on. Her real lever is timing: money genuinely saved before 1 January 2024 is not assessable at all under Por 162, no matter when she brings it in, provided she can document the pre-2024 balance. See remitting pre-2024 savings under Por 162 for what proof holds up, and was the remittance tax repealed? for the honest, still-unsettled answer on the broader reform.

Filing: who needs to, and by when

If you are tax-resident and remit assessable foreign income, or earn Thai-source income, you generally need to file — even in years when the math above lands at zero tax owed. A Thai Tax ID (TIN) is typically required once you cross 180 days and remit assessable income in that year. Paper returns for the 2025 tax year were due 31 March 2026; e-filing extended it to 8 April 2026 — expect a similar window filed in early 2027. Start the TIN and filing process early, since Revenue Department offices book up in March.

The retirement visa's ฿800,000/฿65,000 financial requirement is a separate pot from what you can safely remit and spend — don't conflate the two. Track the bigger unresolved policy question, whether a future government revives the shelved relief draft, on the foreign income tax status tracker.

Frequently Asked Questions

Is there an official government tax calculator for expats?

The Revenue Department's English-language site (rd.go.th) explains rates and deductions but doesn't publish an interactive expat-specific calculator. Private calculators exist online, but treat their outputs as a starting estimate — the worked examples above show the mechanics so you can check any tool's result by hand.

How much foreign income can I remit tax-free in 2026?

There's no flat ceiling; it depends on your allowances. A single filer under 65 typically shields around ฿210,000–260,000 (personal allowance plus the ฿150,000 zero band, plus any employment-type expense deduction). A retiree over 65 with the full allowance stack can often shield closer to ฿500,000. Pre-2024 savings remitted under Por 162 aren't assessable at all, regardless of amount.

Do I owe Thai tax if I remit money but stay under 180 days?

No. The remittance tax only applies to Thai tax residents — anyone physically present in Thailand 180 days or more in a calendar year. Below that, your foreign remittances aren't assessable that year, though Thai-source income is always taxable regardless of residency.

Does this calculation apply the same way to LTR visa holders?

No. Foreign income remitted by a Wealthy Global Citizen or other qualifying LTR category holder is exempt from Thai personal income tax under the LTR program rules. Check LTR visa financial requirements if that route fits your situation.

Will the tax reform relief ever get enacted?

Unknown as of mid-2026. A 2025 draft would have exempted foreign income remitted within the year earned or the following year, but it lapsed when parliament dissolved ahead of the 8 February 2026 election, and no source since has confirmed the new government's position. Assume the current remittance-based rule stays in force until it's officially changed.

The bottom line

For most ordinary expats, the honest range is somewhere between "close to zero" for a retiree who stacks every allowance correctly, and roughly 10% effective for a working nomad remitting six figures in freelance income with fewer deductions to lean on. Run your own numbers against the brackets and allowances above, keep clean records of what you earned before versus after 1 January 2024, and get a real accountant to check your specific income category before you file. This page is a calculation guide, not tax advice, and Thai tax rules are genuinely mid-reform — don't treat any single source, including this one, as the last word without checking the date on it.