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Personal Income Tax

Thailand Personal Income Tax (PIT) FAQs

Understanding Thailand Personal Income Tax is important for employees, business owners, investors, retirees, and foreigners residing in Thailand. Thailand applies a progressive tax system and provides various deductions, allowances, and filing thresholds that may affect an individual’s tax liability.

This guide answers common questions relating to Thailand Personal Income Tax, including deductible expenses, personal allowances, spouse and child deductions, tax return filing requirements, and income thresholds applicable under Thai tax regulations.

Whether you are working in Thailand, earning business income, or reviewing your tax obligations as a foreign resident, these FAQs provide a general overview of the current Thailand Personal Income Tax framework.

What is Personal Income Tax (PIT) in Thailand?

Thailand Personal Income Tax (PIT) is a direct tax imposed on income earned by individuals and certain entities, including ordinary partnerships, non-juristic bodies of persons, and undistributed estates.

In general, taxpayers are required to calculate their tax liability, file an annual tax return, and pay any applicable tax based on the calendar year.

What deductible expenses apply to employment income?

Income derived from employment may qualify for deductible expenses at the rate of 50% of income, subject to a maximum deduction of THB 100,000.

Employment income may include:

  • Salary and wages
  • Bonuses and gratuities
  • Per diem payments
  • Pensions
  • Housing allowances
  • Employer-provided accommodation
  • Debt payments made by an employer on behalf of an employee
  • Other monetary benefits arising from employment

What deductible expenses apply to income under Section 40(3) of the Revenue Code?

Income under Section 40(3) of the Thai Revenue Code may include:

  • Goodwill payments
  • Copyright royalties
  • Other rights and intellectual property income
  • Annuities or annual payments received under a will, juristic act, or court order

Such income may qualify for deductible expenses at 50% of income, subject to a maximum deduction of THB 100,000, where applicable.

What is the personal allowance for individual taxpayers?

The standard personal allowance for an individual taxpayer is THB 60,000.

Where both spouses earn taxable income, each spouse may claim their applicable personal allowance separately, subject to the relevant tax rules.

Is there a spouse allowance available?

Yes. A taxpayer may claim a spouse allowance of THB 60,000, provided that the spouse does not have taxable income or meets the applicable requirements under Thai tax regulations.

What child allowances are available?

Taxpayers may generally claim a child allowance of THB 30,000 per child.

Additional deductions may be available for qualifying second and subsequent children born from 2018 onward, subject to the conditions prescribed by the Revenue Department.

Requirements and eligibility may vary depending on the child’s status and supporting documentation.

Are allowances available for estates and non-juristic entities?

Yes. The allowance for an undistributed estate is generally THB 60,000.

For a non-juristic partnership or non-juristic body of persons, the allowance is generally THB 60,000 per individual, subject to an overall maximum allowance of THB 120,000.

What are the filing thresholds for taxpayers with employment income only?

A Personal Income Tax return is generally required where:

For a single taxpayer:

Annual employment income exceeds THB 100,000


For a married taxpayer:

Combined income of the taxpayer and spouse exceeds THB 200,000

What are the filing thresholds for taxpayers with other types of income?

For taxpayers earning income other than employment income, or a combination of employment and other income:

For a single taxpayer:

Annual income exceeds THB 60,000


For a married taxpayer:

Combined annual income of both spouses exceeds THB 120,000

When must an undistributed estate file a tax return?

An undistributed estate is generally required to file a Personal Income Tax return if its annual income exceeds THB 60,000.

An undistributed estate refers to the assets, income, and property left by a deceased person that have not yet been distributed to the heirs or beneficiaries. During the administration period, the estate may have certain tax obligations under Thai law.

When must a non-juristic partnership or non-juristic body of persons file a tax return?

A non-juristic partnership or non-juristic body of persons is generally required to file a tax return if its annual income exceeds THB 60,000.

If I earn THB 25,833 per month, do I need to pay Personal Income Tax?

An employee earning approximately THB 25,833 per month with no additional taxable income, bonuses, fringe benefits, or other sources of income may fall below the Personal Income Tax threshold.

However, actual tax liability depends on several factors, including:

  • Bonuses and commissions
  • Additional income sources
  • Allowable deductions
  • Spouse and child allowances
  • Foreign-sourced income rules
  • Other tax incentives and exemptions

Individual circumstances should always be reviewed before determining tax liability.

Do foreigners living in Thailand have to pay Personal Income Tax?

Foreigners residing in Thailand may be subject to Thai Personal Income Tax depending on their tax residency status, income source, and applicable regulations.

Tax obligations may differ based on:

  • Length of stay in Thailand
  • Thai-sourced income
  • Foreign-sourced income
  • Applicable double taxation agreements
  • Type of visa and employment arrangement

Professional advice is recommended where foreign income or cross-border taxation is involved.

Need Assistance with Thailand Personal Income Tax?

Understanding Thailand’s Personal Income Tax rules, deductions, and filing requirements can be complex, especially for foreign residents, investors, and business owners.

If you require assistance regarding tax filing, tax planning, or compliance matters in Thailand, please contact our team for professional guidance.

Disclaimer: The content on this website is for general informational purposes only and does not constitute legal, accounting, tax, or professional advice. Viewing this website or contacting our firm does not establish a lawyer-client relationship. Professional advice should be obtained for your specific situation.

This CONTENT has been updated, reviewed and verified on May 2026 by:
Picture of PAEMIKA BUAPRASERT (Accountant & HR)
PAEMIKA BUAPRASERT (Accountant & HR)

Licensed CPD in Accountancy
Specialization: Tax Planning, Full Accounting System, Financial Statement