Foreign residents who live in Thailand for 180 days or more during a calendar year are normally considered Thai tax residents. This means they may be required to file a Thai personal income tax return, especially if they have income earned in Thailand or foreign-sourced income that is brought into Thailand.
For many expats, especially retirees receiving pension income from abroad, it is important to understand which deductions may reduce taxable income and when a Double Taxation Agreement (DTA) between Thailand and your home country may apply. The deductions below are general tax allowances available in Thailand and apply to qualifying tax residents regardless of nationality, but the exact result depends on each person’s income type, residency status, family situation and supporting documents.
1. Personal Allowance
Thai name: ค่าลดหย่อนส่วนตัว
Amount: 60,000 THB
This is the basic personal deduction available to individual taxpayers in Thailand. Expats who file a Thai personal income tax return can normally claim this allowance.
2. Spouse Allowance
Thai name: ค่าลดหย่อนคู่สมรส
Amount: 60,000 THB
This deduction applies if the taxpayer is legally married and the spouse has no assessable income. It does not normally apply to an unmarried partner or common-law relationship. For expats, the marriage should be legally recognized and properly documented.
3. Child Allowance
Thai name: ค่าลดหย่อนบุตร
Amount: 30,000 THB per child
A taxpayer may claim a deduction for qualifying children. An additional 30,000 THB may apply for the second and subsequent legitimate child born in or after 2018.
4. Parental Care Allowance
Thai name: ค่าลดหย่อนอุปการะเลี้ยงดูบุพการี
Amount: 30,000 THB per qualifying parent
This deduction may apply when the taxpayer supports parents, or the spouse’s parents, who are over 60 years old and have annual income below the allowed threshold. Documentation may be required.
5. Life Insurance Premium Deduction
Thai name: ค่าลดหย่อนเบี้ยประกันชีวิต
Amount: Up to 100,000 THB
Premiums paid for qualifying life insurance policies may be deductible. In practice, the policy normally needs to be issued by a qualifying insurance company operating in Thailand and supporting documents should be available.
6. Health Insurance Premium Deduction
Thai name: ค่าลดหย่อนเบี้ยประกันสุขภาพ
Amount: Up to 25,000 THB
Health insurance premiums may be deductible up to the allowed limit, provided the policy qualifies under Thai tax rules. This is especially relevant for retirees and expats who have private medical insurance in Thailand.
7. Retirement Fund / RMF / Provident Fund
Thai name: กองทุนรวมเพื่อการเลี้ยงชีพ / กองทุนสำรองเลี้ยงชีพ
Amount: Subject to percentage limits and overall annual caps
Certain Thai retirement savings schemes may qualify for tax deductions. These rules are more relevant for people working or investing in approved retirement products in Thailand.
8. Social Security Contributions
Thai name: กองทุนประกันสังคม
If the taxpayer is employed in Thailand and contributes to the Thai Social Security Fund, those contributions may be deductible within the annual limit.
Important Notes for Foreign Pensioners
A foreign pensioner living in Thailand may still be considered a Thai tax resident if staying in Thailand for 180 days or more during the calendar year. Pension income from any country may need to be reviewed under both Thai tax rules and the Double Taxation Agreement (if any) between Thailand and the country where the pension originates.
Thailand has Double Taxation Agreements with a wide range of countries, including most of Europe, North America, Australia, and many parts of Asia. The exact treatment of pension and other foreign income depends entirely on the specific treaty between Thailand and your home country. A DTA does not automatically mean that tax disappears — in many cases the taxpayer must prove where the income was already taxed and provide supporting documents, such as a tax certificate from the home country’s tax authority.
It is the taxpayer’s responsibility to review the DTA between Thailand and their own country to determine the most accurate and beneficial tax treatment for their personal situation.
Possible Exemptions or Relief
There are situations where an expat may avoid Thai tax or reduce Thai tax liability:
- Double Taxation Agreement: If the income is already taxed in the home country, the applicable treaty may provide relief, exemption or tax credit depending on the type of income and the specific treaty article.
- Foreign income earned before 1 January 2024: Foreign-sourced income earned before this date may be treated differently under the transitional rules.
- Foreign income remitted to Thailand: For income earned from 1 January 2024 onward, foreign-sourced income brought into Thailand by a Thai tax resident may be taxable in Thailand when remitted.
- Income below taxable level: If taxable income after deductions is low enough, there may be little or no tax payable, even if a tax return is filed.
Because tax treatment depends on the source of income, the year it was earned, when it was brought into Thailand, and whether tax has already been paid abroad, expats should keep clear records and consult a qualified Thai tax advisor — together with a tax professional in their home country if needed — before filing.
Disclaimer: This information is general guidance only and should not be treated as personal tax advice. Thai tax rules, Revenue Department practice and treaty interpretation may change. Always confirm your individual case with a licensed tax professional.