Tax Residency (180-Day Rule)
Your tax obligations in Thailand depend primarily on whether you are classified as a tax resident. The rule is straightforward:
- Tax resident: If you spend 180 days or more in Thailand in a calendar year (January 1 to December 31), you are a Thai tax resident.
- Non-resident: If you spend fewer than 180 days in Thailand, you are only taxed on income earned within Thailand (Thai-sourced income).
The 180-day count is based on physical presence — the day of arrival and the day of departure both count. The days do not need to be consecutive.
What Tax Residency Means
As a Thai tax resident, you are subject to Thai personal income tax on:
- All Thai-sourced income — salary, business income, rental income, investment gains from Thai sources
- Foreign-sourced income remitted to Thailand — this is the big change from 2024 (see the Foreign Income section below)
Important distinction: Thai tax residency is not the same as immigration status. You can be on a tourist visa and still be a tax resident if you spend 180+ days in the country. Conversely, holding a Non-Immigrant visa does not automatically make you a tax resident if you spend less than 180 days in Thailand.
Personal Income Tax Rates
Thailand uses a progressive tax system with rates from 0% to 35%. The tax year is the calendar year (January 1 to December 31).
2025/2026 Tax Brackets
| Taxable Income (THB) | Tax Rate | Approx. US$ Equivalent |
|---|---|---|
| 0 — 150,000 | 0% (exempt) | US$0 — 4,545 |
| 150,001 — 300,000 | 5% | US$4,546 — 9,090 |
| 300,001 — 500,000 | 10% | US$9,091 — 15,150 |
| 500,001 — 750,000 | 15% | US$15,151 — 22,727 |
| 750,001 — 1,000,000 | 20% | US$22,728 — 30,303 |
| 1,000,001 — 2,000,000 | 25% | US$30,304 — 60,606 |
| 2,000,001 — 5,000,000 | 30% | US$60,607 — 151,515 |
| Over 5,000,000 | 35% | Over US$151,515 |
Deductions and Allowances
Taxable income is calculated after various deductions:
- Personal allowance: THB 60,000 per taxpayer
- Spouse allowance: THB 60,000 (if spouse has no income)
- Child allowance: THB 30,000 per child (legitimate children only)
- Expense deduction: 50% of employment income, capped at THB 100,000
- Social security contributions: up to THB 9,000/year (deductible)
- Life insurance premiums: up to THB 100,000/year
- Health insurance premiums: up to THB 25,000/year
- Provident fund contributions: up to THB 500,000/year
- Home mortgage interest: up to THB 100,000/year
- Charitable donations: up to 10% of net income
Example: An expat earning THB 100,000/month (THB 1,200,000/year) would have taxable income of approximately THB 1,040,000 after the personal allowance and expense deduction. The tax owed would be approximately THB 131,500 (effective rate ~11%).
Foreign Income Taxation (2024 Changes)
This is the most significant tax change affecting expats in recent years. Understanding the new rules is critical for anyone remitting money to Thailand.
The Old Rule (Before January 1, 2024)
Under the previous system, foreign-sourced income was only taxable in Thailand if it was earned in one year and remitted to Thailand in the same year. This meant that if you earned money abroad in 2023 and transferred it to Thailand in 2024, it was not taxable. Many expats used this "year-straddling" strategy to avoid Thai taxation of foreign income.
The New Rule (From January 1, 2024)
The Revenue Department announced that from January 1, 2024, foreign-sourced income remitted to Thailand by a tax resident is taxable regardless of when it was earned. This means:
- If you are a Thai tax resident (180+ days), all foreign income brought into Thailand is potentially taxable
- The year-straddling loophole is closed
- Income earned before January 1, 2024, and remitted to Thailand after that date is generally considered exempt (the rule is not retroactive)
- Savings accumulated before 2024 that are transferred to Thailand remain non-taxable (as they were earned under the old rules)
What Counts as "Remittance"?
- Bank transfers from a foreign account to a Thai account
- Cash brought into the country
- Credit/debit card spending in Thailand using a foreign card (this is a gray area under active discussion)
- Cryptocurrency conversions or transfers
This area is evolving. The Revenue Department is still issuing guidance and clarifications. Enforcement mechanisms are being developed. If you have significant foreign income, consult a Thai tax advisor. The rules may change or be refined as implementation proceeds.
Who Is Most Affected?
- Retirees living on foreign pensions — pension income remitted to Thailand may now be taxable (subject to DTA provisions)
- Digital nomads and remote workers — salary from foreign employers remitted to Thailand is potentially taxable
- Investors — dividends, capital gains, and rental income from foreign investments remitted to Thailand
- LTR visa holders — generally exempt (see the LTR section in our Visas page)
Double Taxation Agreements
Thailand has Double Taxation Agreements (DTAs) with over 60 countries. These treaties prevent you from being taxed twice on the same income — once in the source country and again in Thailand.
Key DTA Countries
| Country | Key Provisions |
|---|---|
| United States | DTA covers employment income, pensions, dividends, interest, royalties. US citizens are still subject to worldwide US taxation but can claim foreign tax credits. |
| United Kingdom | Government pensions taxed only in the UK. Private pensions may be taxable in Thailand. Dividends and interest provisions apply. |
| Australia | Comprehensive DTA. Australian superannuation (pension) treated as pension income under the treaty. |
| Germany | Government pensions taxed only in Germany. Social security pensions taxed only in Germany. |
| Japan | Comprehensive DTA covering most income types. Japan has a large expat community in Thailand. |
| France, Canada, Netherlands, Sweden, Denmark, Norway | All have comprehensive DTAs with Thailand covering employment, pensions, dividends, interest, and capital gains. |
How DTAs Work in Practice
- If you paid tax on income in your home country, the DTA typically allows you to claim a tax credit in Thailand (or vice versa)
- Some income types are only taxable in one country (e.g., government pensions are often only taxable in the paying country)
- You may need to obtain a Certificate of Residence from the Thai Revenue Department to claim DTA benefits
- DTAs override domestic law when they provide more favorable treatment
Get professional advice: DTA provisions are complex and vary significantly between countries. If you have foreign income, invest in a consultation with a tax advisor who specializes in Thai taxation of foreigners. The cost (THB 5,000-15,000 for a consultation) is small compared to potential tax liabilities.
Tax Filing Deadlines & Process
Key Dates
| Deadline | What |
|---|---|
| March 31 | Annual personal income tax return filing deadline (for the previous calendar year). Can be extended to April 8 when filing online. |
| September 30 | Mid-year tax filing (PND 94) for certain types of income (rental, freelance, business income — categories 5-8) |
| Monthly (7th) | Employer withholding tax submission — your employer handles this |
Filing Process
If you are employed by a Thai company, your employer handles monthly withholding tax. However, you may still need to file an annual return if you have other income sources.
- Get a Tax ID Number (TIN): If your employer has not already arranged this, visit the Revenue Department office in your district with your passport and work permit. The TIN is 13 digits.
- Gather documents: Withholding tax certificates from employers (50 Tawi form), bank interest statements, other income documentation
- File online: The Revenue Department's e-filing system (efiling.rd.go.th) is available in Thai. You can also file in person at any Revenue Department office.
- Pay or receive refund: If you owe additional tax, pay at the Revenue Department, via bank transfer, or at convenience stores. Refunds are processed within 3-6 months.
Which Form to Use
- PND 91: For employment income only (salary, wages, bonuses)
- PND 90: For all types of income (employment plus other sources — investments, rental, freelance, etc.)
- PND 94: Mid-year filing for non-employment income
Penalty for late filing: A surcharge of 1.5% per month on unpaid tax, plus a potential fine of up to THB 2,000 for late filing. It is much better to file on time even if you need to estimate — you can amend later.
VAT (Value Added Tax)
Thailand's Value Added Tax (VAT) rate is 7%. This is one of the lowest VAT rates in the world (the standard rate is technically 10%, but a reduced rate of 7% has been continuously extended by royal decree since 1999).
What Is Subject to VAT?
- Most goods and services sold in Thailand
- Imported goods
- Professional services (legal, accounting, consulting)
- Hotel rooms and restaurant meals
What Is VAT-Exempt?
- Fresh food and agricultural products (unprocessed)
- Medical and healthcare services
- Education services
- Domestic transportation
- Rental of residential property
- Basic financial services (interest, foreign exchange)
VAT Refund for Tourists
Tourists can claim a VAT refund on purchases of THB 2,000 or more (per store, per day) at participating shops displaying the "VAT Refund for Tourists" sign. Claim at the airport before departure at the VAT Refund Office. You need your passport, VAT refund forms (PP10), and original receipts. Refund processing fee of THB 100 applies.
Social Security Contributions
If you are employed in Thailand with a work permit, both you and your employer are required to contribute to the Thai Social Security Fund.
Contribution Rates
| Contributor | Rate | Maximum Monthly Contribution |
|---|---|---|
| Employee | 5% of salary | THB 750/month (based on max salary cap of THB 15,000) |
| Employer | 5% of salary | THB 750/month |
| Government | 2.75% of salary | THB 412.50/month |
The salary cap for social security contributions is THB 15,000/month. Even if you earn THB 200,000/month, your contribution is capped at THB 750/month (5% of THB 15,000).
What Social Security Covers
- Medical treatment — free treatment at your registered social security hospital (you choose one hospital when registering)
- Maternity benefits — 90 days of salary compensation at 50% of salary
- Disability benefits — 50% of salary for up to 12 months
- Death benefits — funeral grant and survivor benefits
- Child allowance — THB 800/month per child (up to 3 children)
- Old-age pension — if you contribute for 180+ months, you receive a pension. If less than 180 months, you receive a lump sum refund when you leave Thailand permanently.
- Unemployment benefits — 50% of salary for up to 180 days
For departing expats: If you contributed to Thai social security for less than 180 months (15 years) and you permanently leave Thailand, you can apply for a lump-sum refund of your personal contributions. Apply at the Social Security Office with your passport, work permit, and bank details. Processing takes 2-3 months.
Social Security Hospital
When you register for social security, you choose one hospital as your designated provider. For medical treatment covered by social security, you must go to this specific hospital (or be referred from it). Many expats choose to use their social security hospital for routine care and their private insurance for specialist or premium care.
Popular social security hospital choices for expats include Phyathai Hospital, Paolo Hospital, and Vibhavadi Hospital — these are private hospitals that participate in the social security scheme and offer reasonable English-language service.