If you spend 180 days or more in Thailand in a calendar year, you become a Thai tax resident. In isolation that didn't mean much — Thailand only taxed income brought into Thailand in the same year. Then came Royal Decree 161/2566 (Paw 161) in January 2024, which changed everything for expats with ongoing income.
Tax Residency: The Key Points
- 180+ days in Thailand (calendar year Jan-Dec) = tax resident
- Days don't have to be consecutive (4 x 45-day trips = 180 days)
- Paw 161 (2024): income earned AND remitted same year is assessable
- Pre-2024 savings remitted now are not affected
- Tax rates: 0-35% depending on income bracket (8 brackets)
- Personal allowance: ฿60,000/year reduces taxable income
- Filing required if ฿50,000+ assessable income (single) or ฿100,000+ (married)
- File by March 31 following year via Revenue Dept or a tax accountant
What Is Tax Residency in Thailand?
Tax residency is a legal status determining which country can tax your income. Under Thai law, you are a tax resident if you spend 180 or more days in Thailand in a calendar year (January 1 to December 31).
The key word is "days." They can be any combination of days. If you spend 45 days in Thailand in January-February, leave for 50 days, return for 50 days, leave again, then return for 60 days — you've hit 180 days. At day 180 of that year, you become tax resident. This applies retroactively from January 1.
Thailand has no "tie-breaker" rules. Unlike the UK or US (which look at immigration status, permanent residence, or intention), Thailand simply counts days. 180 days = tax resident. There's no exception for tourists, visa types, or temporary residents.
The 2024 Rule Change — What Actually Changed
Before January 2024, Thailand had a remittance-based tax system: you only paid Thai tax on income brought into Thailand. Income earned overseas and kept overseas was not taxed in Thailand, even if you were tax resident. This loophole meant a UK remote worker earning £50,000/year in a London bank account was not taxed in Thailand, even while living in Phuket for 6 months+.
Royal Decree 161/2566 changed this. Starting January 1, 2024, any income earned in a calendar year AND remitted to Thailand in the same calendar year is assessable (subject to Thai tax). The key rule: earnings date + remittance date must be in the same calendar year.
Let's be precise. If you earned $50,000 USD from a UK client in 2024 and remitted it to your Thai bank account in 2024 (same calendar year), it is assessable. If you earned that same $50,000 in 2023 and remitted it in 2024, it was earned in 2023 — it's not assessable (under the old system).
What this means: Pre-2024 savings held overseas are still protected. Only post-2024 income remitted in the year earned is affected. If you have ฿5 million in a UK bank account from years of work before 2024, you can remit it to Thailand in 2024, 2025, or whenever — it's not assessable because it wasn't earned in 2024.
What Income Is Assessable?
Under Paw 161, assessable income includes:
- Employment income: salary, bonuses, benefits from remote work or local employment
- Business income: profit from freelancing, online business, consulting
- Rental income: if you rent out a condo or house in Thailand or overseas
- Dividends: from stocks, ETFs, or investments (if remitted to Thailand)
- Capital gains: profit from selling assets (rules vary; consult a tax professional)
- Pension income: state pensions (US Social Security, UK State Pension) if remitted
Income NOT assessable (or exempt):
- Interest on Thai bank deposits (flat 15% withholding, not progressive tax)
- Dividend income (but some remitted dividends may be assessable; rules are complex)
- Foreign savings held overseas and not remitted
- Inheritance and gifts (not considered income in most cases)
Thai Income Tax Rates 2026
Thailand uses a progressive tax system with eight brackets. Once you calculate your assessable income (minus allowances), you apply these rates:
| Annual Assessable Income | Tax 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% |
| Over ฿5,000,000 | 35% |
Personal Allowances and Deductions
Before you apply tax brackets, you reduce your assessable income with allowances. These dramatically lower your taxable income:
- Personal allowance: ฿60,000 per year (mandatory for all)
- Spouse allowance: ฿60,000 (if married and filing jointly)
- Child dependents: ฿30,000 per child (up to 3 children)
- Employment income deduction: 50% of employment income, max ฿100,000 (for salary/wages only)
- Pension income deduction: 50% of pension income, max ฿100,000 (for state pensions and retirement income)
Example: You earn ฿2,000,000 (tax year 2026). You have a Thai spouse and two children.
- Gross income: ฿2,000,000
- Personal allowance: -฿60,000
- Spouse allowance: -฿60,000
- Child allowance (2 children): -฿60,000
- Employment deduction (if applicable): -฿100,000
- Assessable income: ฿1,720,000
- Tax on ฿1,720,000: approx. ฿190,000
- Effective rate: ~9.5% of gross income
The allowances are substantial. Most expats with modest income (<฿2M/year) end up paying little to no Thai tax after allowances.
Double Tax Agreements (DTAs)
Thailand has double tax agreements with over 61 countries, including the UK, US, Australia, Germany, France, Canada, and most developed nations.
Important clarification: DTAs do NOT exempt you from Thai tax. DTAs determine which country has primary taxing rights and provide foreign tax credits to prevent double taxation.
For example, UK State Pension:
- UK would normally tax it (as income earned in UK)
- Thailand would normally tax it (if you're tax resident and remit it)
- UK-Thailand DTA says: the country of payment (UK) has primary right to tax it
- You pay tax to the UK. Thailand allows a foreign tax credit (you don't pay Thai tax on the same income)
Different countries have different rules in their DTAs. Some DTAs exempt certain pension income entirely. Always consult a tax professional who specializes in your specific home country.
The Thai Revenue Department office in Phuket: Phraya Nakharin Rd, Phuket Town. Tel: 076-212120. They can answer visa and tax residency questions, though they'll likely refer you to a tax professional for specific income assessments.
Who Actually Has to File a Tax Return?
You must file a Thai tax return (TH TD-90 form) if you meet both conditions:
- You are tax resident (180+ days in Thailand during the calendar year)
- You have assessable income of ฿50,000+ (single filer) or ฿100,000+ (married filing jointly)
If you meet both criteria, you must file by March 31 of the following year (e.g., for 2026 income, file by March 31, 2027).
Penalties for non-filing: ฿2,000 fine plus 1.5% per month interest on any unpaid tax (compounding). This escalates quickly. It's far better to file and report ฿0 tax owed (or claim foreign tax credits) than to skip filing entirely.
Thai tax authorities increasingly cross-reference bank deposits with tax filing records, especially for expats. If you receive large deposits and don't file, you'll eventually face inquiries.
Visa Type and Tax Implications
LTR Visa (Long-Term Resident Visa)
LTR visa holders receive a special 17% flat tax rate on employment income earned in Thailand (not investment income, not overseas income). This is a genuine benefit if you're earning a salary in Thailand. However, you're still subject to standard tax rules on investment income, rental income, and overseas income remitted to Thailand. You must be tax resident (180+ days) for the flat rate to apply.
Elite Visa and Privilege Pass
No special tax status. You're treated like any other resident. If tax resident and you have assessable income, you pay standard Thai tax rates.
Non-OA (Retirement) Visa
No special tax status. Standard rules apply. If you're receiving a pension and are tax resident, your pension may be assessable (depending on your country's DTA with Thailand).
DTV (Digital Nomad Visa)
The DTV is technically a Non-Immigrant visa. If you spend 180+ days in Thailand on a DTV, you're tax resident under the same rules as anyone else. No special exemptions.
Practical Steps for Phuket Expats
Step 1: Track Your Days Carefully
Keep a record of when you arrive and leave Thailand. Many expats use their passport stamps, airline tickets, or a simple spreadsheet. Once you hit day 180 in a calendar year, you're tax resident from January 1 of that year.
Step 2: Segment Your Pre-2024 and Post-2024 Savings
If you have a large sum from work before 2024, keep records showing it was earned pre-2024. When you remit it to Thailand, document the source. This protects you if the Revenue Department questions large deposits.
Step 3: Get a Thai Tax ID Number (TIN)
Visit the Thai Revenue Department in Phuket (Phraya Nakharin Rd, Phuket Town) and request a tax ID number. This is free and takes 30 minutes. You'll need this to file taxes or open business accounts.
Step 4: Consult a Tax Professional Early
If you have any assessable income (employment, business, rental, pension), hire a Thai tax accountant by February. Filing by yourself is possible (forms are in Thai), but a professional costs ฿3,000-10,000 and saves stress and errors. They'll handle calculations, DTA claims, and filing.
Step 5: File Even If Zero Tax Owed
If you have ฿50,000+ assessable income but qualify for allowances/deductions that reduce it to zero, you should still file a nil (zero tax) return. This is cleaner and shows you're compliant to the Revenue Department.
Tax Filing Services in Phuket
Many accounting firms and English-speaking tax consultants in Phuket specialize in expat taxes. Search "tax accountant Phuket" or ask in Phuket Expat Community Facebook groups for referrals. Costs typically range from ฿3,000-10,000 depending on complexity. A good accountant will:
- Calculate your assessable income correctly
- Identify applicable DTA benefits
- Maximize your allowances and deductions
- File your return by March 31
- Respond to any Revenue Department inquiries
FAQ
What is Thailand's 180-day tax residency rule?
Did the 2024 tax rule change affect all expats in Thailand?
Can I avoid Thai tax by using an Elite or LTR visa?
What happens if I don't file a Thai tax return?
Does the Thailand-UK Double Tax Agreement protect me from Thai tax?
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Paw 161 and its interpretation are still settling. Don't guess about your tax obligations. Consult a Thai tax professional to understand your specific situation and get a filing plan sorted.
Ask Us for a Referral →Last updated: February 2026. This article is for information only and does not constitute tax, legal, or financial advice. Thai tax law is complex and still evolving post-Paw 161. Always consult a licensed Thai tax professional and a qualified accountant familiar with your home country's tax treaties before making tax decisions or filing returns. The information provided is accurate to our best knowledge, but tax interpretations vary by individual circumstance.
