Introduction
Running payroll in Thailand means navigating progressive personal income tax, mandatory Social Security Fund contributions, Workmen’s Compensation obligations, and a schedule of monthly and annual filings with both the Revenue Department and the Social Security Office. For most foreign businesses, outsourcing payroll services in Thailand to a specialist provider is the most reliable way to stay current as regulations continue to evolve.
Thailand is one of Southeast Asia’s most attractive destinations for business expansion. Majorly because of a cost-competitive workforce, improving digital infrastructure, a strategic geographic position at the heart of the ASEAN region, and a government that actively courts foreign investment. But for any company that employs staff there, understanding payroll services in Thailand can get complex. It is one of the most operationally critical things to get right, and one of the easiest to get wrong.
Thai payroll is governed by a layered regulatory framework spanning the Labour Protection Act, the Revenue Code, the Social Security Act, and the Workmen’s Compensation Act. This guide breaks down what employers need to know and explains why to consider outsourcing it.
What Payroll Services in Thailand Actually Cover
Thai payroll is considerably more involved than simply transferring salaries to employee bank accounts each month. A complete payroll function in Thailand encompasses the calculation of gross pay, all mandatory deductions and employer contributions, the generation of compliant payslips (in Thai or English), and the preparation and submission of multiple returns to government authorities on a recurring basis.
The core obligations that any employer must manage on a monthly basis in Thailand include:
| Obligation | Rate / Details | Submitted To |
| Personal Income Tax (PIT) Withholding | Progressive 0%–35%; withheld monthly (PND.1 form) | Revenue Department |
| Social Security Fund (SSF) | 5% of salary (employer + employee, each capped at THB 750/month) | Social Security Office (SSO) |
| Workmen’s Compensation Fund (WCF) | 0.2%–1% of annual payroll (employer-only; varies by industry risk) | Social Security Office |
| Employee Welfare Fund (EWF) | 0.25% of wages (from Oct 2025); applies to employers with 10+ staff | Department of Labour Protection |
| Provident Fund | Optional 2%–15% employer contribution; if offered, must be consistent | SEC-registered Fund |
Beyond monthly processing, payroll records in Thailand must be maintained for a minimum of seven years and must be available for audit. From 2025 onwards, all monthly withholding tax returns must be submitted electronically.
Understanding Thailand’s Personal Income Tax
For employers managing payroll in Thailand, personal income tax (PIT) withholding is the most calculation-intensive part of the monthly cycle. Thailand operates a progressive PIT system, with rates that rise from zero on the lowest income bands to 35 percent on the highest. Employers are responsible for estimating each employee’s annual tax liability at the start of the year and withholding a proportional amount each month.
| Up to THB 150,000 | 0% |
| THB 150,001 – 300,000 | 5% |
| THB 300,001 – 500,000 | 10% |
| THB 500,001 – 750,000 | 15% |
| THB 750,001 – 1,000,000 | 20% |
| THB 1,000,001 – 2,000,000 | 25% |
| THB 2,000,001 – 5,000,000 | 30% |
| Over THB 5,000,000 | 35% |
Employees are entitled to a standard personal allowance, spouse allowances, child allowances, and various deductible expenses including provident fund contributions and life insurance premiums. Payroll teams must factor these allowances into monthly withholding calculations accurately. The errors at this stage compound over the year and create reconciliation problems at the annual filing deadline.
It is also worth noting that Thailand’s tax residency rules apply based on physical presence. Individuals present in Thailand for 180 days or more in a calendar year are tax residents, taxed on all Thai-sourced income.
What Changed in 2025: Key Regulatory Updates Employers Must Know
Thailand’s regulatory environment is constantly evolving, and payroll compliance requires ongoing attention. Several important updates introduced in 2025 directly impact employer payroll obligations:
- 1. Mandatory electronic filing: From 2025, all monthly PND.1 withholding tax returns must be submitted electronically through the Revenue Department’s online system. Businesses still using manual paper submissions must migrate immediately to avoid processing penalties.
- 2. Employee Welfare Fund (EWF) launched: A new statutory fund, the Employee Welfare Fund, was introduced from October 2025. Employers and employees each contribute 0.25% of wages (rising to 0.5% from October 2030). All companies with ten or more employees must register unless they already operate a qualifying provident fund arrangement covering all staff.
- 3. Migrant worker SSF enrolment: Employers are now required to register all migrant workers under the national social security system, ensuring they receive the same SSF benefits as local employees, including medical care, pensions, and unemployment support.
- 4. Foreign income remittance taxation: Since 1 January 2024, tax-resident employees are assessed on foreign-sourced income remitted to Thailand in the same calendar year. This change affects expatriate payroll, and must be reflected in PIT calculations
FAQs
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Is payroll outsourcing common in Thailand?
Yes. Many businesses outsource payroll services in Thailand to manage compliance, reduce errors, and stay updated with regulatory changes.
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What taxes are deducted from salaries in Thailand?
Employers must deduct personal income tax (0%–35%) and social security contributions, along with other applicable statutory payments.
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What are the key compliance requirements for payroll in Thailand?
Employers must handle PIT filings, SSF contributions, Workmen’s Compensation Fund, and maintain payroll records for audits.
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What changed in Thailand payroll regulations in 2025?
Key updates include mandatory e-filing of tax returns, introduction of the Employee Welfare Fund, and expanded SSF coverage.
Final Thoughts
Managing payroll in Thailand goes beyond salary processing. It requires ongoing attention to tax rules, statutory contributions, and regulatory updates. As requirements evolve, even small errors can lead to penalties or compliance gaps.
For businesses entering or scaling in Thailand, having the right support in place can simplify operations and reduce risk. Galaxy APAC is a leading payroll outsourcing and workforce solutions provider with over 20 years of operational experience across Asia Pacific. In Thailand, Galaxy APAC manages the full payroll cycle on behalf of foreign and domestic businesses.
With a local team tracking updates from key authorities, Galaxy APAC ensures your Thai payroll stays accurate and compliant. With our structured approach to payroll and compliance, companies can focus on growth while ensuring their workforce is managed accurately and on time.
