Payroll for foreign employees in Thailand.

Managing payroll for foreign employees in Thailand requires navigating labour law, taxation, social security and immigration rules. Accurate compliance safeguards business operations, supports visa and work permit requirements, and reassures expatriate staff that their pay and benefits are correctly administered.

In 2025, several points remain critical. Thailand continues to apply progressive personal income tax rates of up to 35% and the 180-day tax residency rule, which directly affects the taxation of foreign-sourced income remitted into the country. Employers are responsible for withholding and e-filing payroll taxes on schedule and enrolling eligible foreign staff in the social security system alongside Thai employees.

This guide outlines both the legal framework and the practical steps for paying foreign staff in Thailand in 2025, from onboarding and documentation to monthly processing, reporting and year-end compliance.

Overview of payroll in Thailand

Thai payroll broadly comprises salary and wages, allowances and benefits, statutory contributions and deductions for personal income tax. Employers are responsible for calculating monthly gross‑to‑net pay, issuing payslips, withholding and remitting tax and filing returns with the revenue department. They must also register employees with the Social Security Office (SSO) and make monthly contributions for eligible staff.

Payroll for foreign employees in Thailand is shaped by two key requirements, which are immigration compliance and occupational restrictions.

Foreign staff may only be employed and paid if they hold the correct visa and work permit, which are tied to the specific employer, job title and location.

Additionally, certain occupations are reserved exclusively for Thai nationals and cannot be performed by foreigners even with a valid work permit. These factors mean HR, legal, tax and immigration processes must be coordinated from the start to ensure full compliance.

Legal framework for employing foreign staff

To employ foreign staff, there are several obligations that employers must meet, including visa and work permit compliance, adherence to restricted job categories, and fulfillment of statutory labour requirements. The following outlines the legal considerations to ensure compliance.

Work permits and visa requirements

Most foreign professionals work under a non‑immigrant B visa paired with a work permit issued by the Department of Employment. The work permit ties the individual to a specific employer, job title and workplace.

Some categories, such as SMART visas for targeted sectors, operate under special rules but still require strict role matching. SMART visa holders may benefit from exemptions from minimum salary thresholds or work permit quotas, depending on the sector.

Employers should ensure the employment contract and payroll records align with the position and location approved in the work permit.

Restrictions on job categories

Thailand maintains a list of occupations reserved for Thai nationals, updated in recent years under the foreigners’ working management decree and subsequent notifications. While the detailed list is nuanced, examples include Thai‑language clerical work, tour guiding and certain traditional crafts. Employers must confirm that the intended role is permitted for foreigners before recruiting.

Employer responsibilities under labour law

Employers must pay at least the provincial minimum wage and comply with rules on working hours, overtime, holidays, leave and termination. From 1 July 2025, Bangkok’s minimum daily wage increased to THB 400, with sector‑specific THB 400 floors for category 2‑4 hotels and entertainment venues nationwide. Other provinces follow the wage committee’s schedule. Payroll teams should confirm the correct rate for the work location and sector.

Employers must also comply with statutory benefits such as annual leave, sick leave, maternity/paternity leave, severance pay and probation period rules. Employment contracts should ideally be drafted in both Thai and English for clarity and compliance.

Taxation of foreign employees in Thailand

An individual is a Thai tax resident if present in Thailand for 180 days or more in a calendar year. Residents are taxed on Thailand‑sourced income and, crucially, on foreign‑sourced income when it is remitted into Thailand under rules applicable from 1 January 2024. Non‑residents are taxed on Thailand‑sourced income only.

Since 1 January 2024, the Revenue Department has clarified that foreign‑sourced income earned on or after that date and later remitted to Thailand by a tax resident is taxable in the year of remittance.

Foreign‑sourced income earned before 1 January 2024 and remitted later is not subject to Thai tax under the transitional guidance. Double tax relief may be available if tax was paid overseas, subject to treaty and documentation. This is a key planning point for expatriates who have offshore income.

Thailand has Double Tax Treaties with countries including the US, UK, Singapore, Japan and EU nations, which can provide relief for taxes already paid abroad.

Personal income tax rates

The personal income tax rates for 2025 are as follows:

Foreign employees may also qualify for personal allowances, spouse/dependent deductions and insurance premium deductions, which should be factored into payroll calculations.

Employer’s withholding obligations

Employers must withhold personal income tax from employment income and submit the monthly withholding return (form P.N.D.1). From 1 January 2025, withholding returns must be submitted via the Revenue Department’s e‑Filing system under the Director‑General’s Notification No. 451.

The standard filing deadline is the 7th of the following month for paper and the 15th for electronic filers. The annual summary return is filed on P.N.D.1 Kor by the 28 February paper deadline or 8 March if e‑filed.

Employers must also issue an annual withholding tax certificate to each employee (commonly known as 50 tawi) to support personal filings. It is recommended to provide this by 15 February for current employees and within one month of departure for leavers.

Social security and other contributions

The social security scheme applies to eligible employees regardless of nationality, with limited exceptions such as government officials and those covered by other regimes. Employers and employees each contribute 5% of the employee’s monthly wage, subject to a wage cap of THB 15,000 per month, so the maximum ordinary contribution is THB 750 per side.

Contributions are normally due by the 15th of the following month, with an e‑payment extension to the 22nd currently in effect for salaries from January 2025 to December 2029.

Foreign employees receive a social security ID card, which allows access to healthcare, maternity, disability, unemployment and old-age pension benefits. For employees earning above THB 15,000, voluntary contributions or supplemental insurance may be considered.

Many expatriate packages also include private medical insurance. However, social security registration remains a statutory requirement in most cases and provides access to state medical care and other benefits such as maternity, disability, unemployment and old‑age pension.

Workmen’s compensation fund

Employers fund the Workmen’s Compensation Fund (WCF) annually through the SSO. The process typically involves filing the annual wage report and settling any balance assessment in the first quarter. Timetables and forms are administered by the SSO and can now be completed online.

Totalisation treaties and exemptions from Thai social security

Some foreign employees seconded from overseas may have home‑country social insurance obligations. Thailand has no comprehensive totalisation treaty network, so double coverage is possible. While certain categories (for example, staff of foreign governments or international organisations) may be outside the Thai scheme, most private‑sector foreign employees in Thailand must participate.

Payroll compliance process for foreign staff

Setting up payroll for foreign employees

Before first payroll, collect and validate the following core documents:

• Passport
• Non‑immigrant visa
• Work permit
• Thai tax identification number
• Local banking details

The work permit job title, employer name and workplace should match the employment contract and HR records. Where a SMART visa applies, retain copies of the underlying approvals.

Contracts should specify salary, allowances, benefits, bonuses, leave entitlements and termination terms in line with Thai labour law and work authorisation conditions. Ensure the compensation package meets both the provincial minimum wage and any nationality‑based minimum salary thresholds applied in immigration practice for work permit renewals.

Common payroll components

Expatriate packages in Thailand often combine base salary with housing allowances, education allowances for dependent children, cost‑of‑living or hardship allowances, home leave travel and relocation support.

In Thailand, cash allowances and benefits‑in‑kind are generally taxable as employment income unless a specific exemption applies. Proper documentation is essential where reimbursements are treated as business expenses rather than taxable benefits.

Employers should confirm treatment with their tax adviser and ensure the payroll engine is configured to distinguish taxable and non‑taxable items correctly.

Reporting and documentation

At month‑end, employers calculate payroll, issue payslips, withhold tax, submit P.N.D.1 and pay social security.

At year‑end, they file P.N.D.1 Kor and issue each employee’s tax withholding certificate (50 tawi), which consolidates the year’s taxable remuneration, tax withheld and social security contributions for personal return filing.

Keeping accurate employee and payroll records supports these filings and eases audits.

Challenges and best practices

Getting tax residency wrong

Misclassifying an expatriate’s residency can cascade into incorrect withholding and unsynchronised personal filings. Use the 180‑day rule as the starting point, then consider travel patterns and arrival/departure timing. Coordinate with the employee on foreign income that might be remitted to Thailand during the year.

Under‑reporting allowances and benefits

Housing, education and other allowances commonly given to expatriates are typically taxable. Under‑reporting leads to year‑end true‑ups, amended returns and potential penalties. Configure payroll categories clearly and require receipts where reimbursements are treated as non‑taxable.

Missing filing deadlines

Thailand enforces monthly and annual payroll deadlines. From 2025, withholding returns must be e‑filed, and social security e‑payments can be made up to the 22nd of the following month, easing cash‑flow but still requiring timely processing. Build a compliance calendar and set internal cut‑offs to avoid surcharges and interest.

Restricted occupations and role drift

A work permit is job‑specific. If actual duties drift into a reserved occupation, or if the job title or workplace changes without updating the permit, the employee can fall out of compliance. Align job descriptions, permits and payroll titles.

Record‑keeping and data protection

Maintain clear payroll records and ensure that employee data collection, processing and retention practices meet Thai personal data protection expectations. Payroll teams should apply role‑based access, secure transmission of payslips and documented retention policies.

Leverage systems or outsource

Accurate gross‑to‑net calculation for expatriate packages, integration with e‑Filing and social security portals, and on‑time issuance of certificates benefit from strong software and experienced local support. Consider outsourcing payroll to a specialist provider to reduce administrative burden and improve compliance.

Conclusion

Running payroll for foreign employees in Thailand in 2025 requires close coordination across labour, tax, social security and immigration rules. Employers must ensure expatriates hold the correct visa and work permit, that the role is legally permitted and that compensation complies with statutory requirements on wages, leave, severance and benefits. Payroll accuracy also hinges on applying Thailand’s progressive tax rates correctly, determining residency under the 180-day rule and assessing how foreign-sourced income is taxed when remitted.

Beyond taxation, compliance also means keeping up with monthly and annual withholding obligations, filing through the Revenue Department’s e-system, registering employees with the SSO and funding the Workmen’s Compensation scheme. Expatriate allowances and benefits require particular care, since most are taxable and often attract scrutiny from authorities.

By building strong internal controls, maintaining accurate records and using reliable systems, or outsourcing to specialist providers, employers can minimise compliance risks, avoid penalties and give foreign staff confidence that their pay and benefits are being handled correctly. With the right framework in place, payroll for foreign employees becomes not just a compliance task but a foundation for smooth international workforce management in Thailand.

How Acclime can help with payroll services

Acclime provides end‑to‑end payroll outsourcing in Thailand, from employer registrations and system configuration through to monthly processing, payslip delivery and statutory submissions. The team sets up compliant gross‑to‑net calculations, submits P.N.D.1 and P.N.D.1 Kor via the revenue department’s e‑Filing system, manages social security registrations and contributions for foreign and local staff, and issues annual employee certificates on time. For expatriate populations, Acclime aligns payroll with visa and work permit conditions, monitors restricted‑occupation nuances, and coordinates with personal tax advisers on residency and foreign‑sourced income remittances. This integrated, locally delivered service helps finance and HR teams reduce risk and free up time to focus on growth. Contact us now to learn more.