How to choose a payroll outsourcing provider in Thailand: 10 questions startups should ask before signing

Before signing, a startup should check four things about a payroll outsourcing provider in Thailand. It should confirm who files tax and social security, how bonuses and severance are calculated, how employee data is protected and how the service handles foreign hires. The 10 questions below focus on where payroll meets tax filings, visas and the ledger.

Key takeaways

About the Author

This guide was written by Settlr Global's payroll and people team in Bangkok, led by Managing Director Gagan Ajmani (15+ years of regional experience across Southeast Asia).

What a payroll outsourcing provider in Thailand does

A payroll outsourcing provider calculates pay, withholds tax and contributions, files monthly returns and issues payslips for a Thai employer. The employer keeps the legal obligations. Startups choose payroll outsourcing to reduce missed deadlines, keep records clean and spend less founder time on government portals.

Founders comparing payroll outsourcing, employer of record and PEO services in Thailand often find the terms used as if they were interchangeable. Each one places employer obligations differently.

Compliance questions

Compliance comes first because the employer generally answers to the Revenue Department and the Social Security Office, even when payroll is outsourced.

1. Who files PND.1 and social security, and who pays late penalties?

The provider should e-file the monthly PND.1 withholding return and social security contributions before each deadline. According to the Revenue Department, late withholding tax generally attracts a monthly surcharge and possible fines, both charged to the employer [1]. Ask whether the contract covers penalties caused by provider error.

Ask to see the provider's filing calendar in writing. Monthly PND.1 returns are due within 7 days after the end of the month of payment, moving to 15 days when filed online for returns due up to 31 January 2027, and social security contributions are due by the 15th of the following month[2]. A provider that cannot show which dates it works to, and how it confirms each submission, is relying on memory rather than process. Request copies of filing receipts for each month so the startup holds its own evidence if a dispute arises later.

2. How is Thailand personal income tax withheld on bonuses?

Personal income tax withholding in Thailand is generally based on estimated annual income, so a bonus changes the monthly figure. Ask the provider to walk through one bonus month and explain how housing or car benefits are taxed. Errors here tend to surface in the annual PND.1 Kor return.

The PND.1 Kor summarises a full year of withholding for every employee and is due by the end of February for the previous tax year, filed electronically unless the employer attaches a letter explaining why it cannot. The online extension to 8 March covers only returns due up to 31 January 2027, so it does not reach the return due in February 2027 unless the Ministry of Finance renews it[2]. Ask who prepares it, who issues employee withholding certificates and how corrections from earlier months are reconciled before submission. A clean year-end depends on accurate monthly records, so this question also tests the provider's month-to-month discipline.

3. Does the service cover social security and the Thailand provident fund?

According to the Social Security Office, social security contributions are generally mandatory for employees [3]. A provident fund is optional for employers, but an employer with 10 or more staff and no provident fund or qualifying scheme falls under the Employee Welfare Fund once its collection starts on 1 January 2027[4]. Once a fund is offered, provident fund deductions, employer matches and remittances run every month, so confirm the provider handles joiners, leavers and rate changes.

Provident funds in Thailand are run through licensed fund managers, so ask whether the provider already works with the startup's chosen manager or will need new data feeds[5]. Confirm who updates member records when an employee changes contribution rate, and how vesting is calculated for leavers.

4. How are final pay, notice and severance handled?

Offboarding combines final salary, unused leave and severance pay. Under Thailand's Labour Protection Act, severance is set by length of service, with separate rules on notice [6]. Ask who calculates these amounts and who reviews termination documents before final pay is released.

A sound offboarding sequence usually runs in this order: confirm the last working day and notice terms, calculate final salary and unused leave, calculate severance where it applies, withhold tax on the final payment, deregister the employee from social security and settle provident fund balances. Ask the provider to show where each step sits in its workflow and who signs off.

Operational questions

5. What is the cut-off, and what happens to late inputs?

A provider should publish a calendar for input collection, approval, disbursement and filing. Ask what happens when a new hire or overtime claim misses cut-off. The answer could be an off-cycle run, a correction next month or an extra fee.

6. Who checks the numbers before money moves?

Ask for a sample itemised payslip and an anonymised gross-to-net working file, which reveal more than a sales deck. A second reviewer and an approval audit trail are reasonable expectations. Settlr Global's payroll service, for example, includes PND.1 e-filing, itemised payslips and a dashboard showing run status and filing confirmations.

7. How is employee data protected?

Ask how the provider controls access to ID numbers, bank details and salaries. Under Thailand's Personal Data Protection Act, ask how it reports breaches [7]. Also ask how long it keeps wage records, since section 115 of the Labour Protection Act sets a minimum of 2 years from each payment [8].

Commercial questions

Payroll needs change as a company grows, so the last three questions test the contract against future hiring.

8. Does payroll connect to the accounting ledger?

Payroll journals should post to the general ledger in a form the accountant can reconcile monthly, including salary, tax and social security liabilities. Ask whether the provider works with the startup's existing accounting software, such as Xero, Zoho Books or QuickBooks.

9. How does pricing change with headcount?

Ask for a fixed monthly fee in Thai baht, the included employee volume, the rate above it and any off-cycle or year-end charges. Then model annual cost = (monthly fee x 12) + extra runs + year-end fees, at today's headcount and at double it.

10. How are foreign hires handled?

Ask whether visa and work permit services sit with the same team. The Destination Thailand Visa covers remote work for employers outside Thailand, so it does not permit employment with a Thai employer and is not a route onto a Thai payroll[9]. See our DTV guide for details.

When an employer of record fits better

Question 10 often exposes a more basic gap. Without a Thai entity, there is no Thai employer for a payroll provider to serve. Under an employer of record, the provider's Thai company becomes the legal employer and handles withholding, social security and work permit sponsorship. The client still picks the hire, sets salary and directs the work.

Settlr Global reports a first EOR hire in about 2 days, from THB 8,999 (local hire) or THB 10,999 (expat hire) per employee per month. EOR can run while incorporation is underway, so a startup should ask early how employees will later transfer to its own company.

Frequently asked questions

Is payroll outsourcing the same as an employer of record in Thailand?

No. With payroll outsourcing, your Thai company stays the employer. With an employer of record, the provider's Thai company is the legal employer under the contract, although section 11/1 of the Labour Protection Act can treat a business that has staff supplied for work in its own operations as their employer[8].

Can a startup outsource payroll without a Thai company?

Generally no, because payroll outsourcing needs a registered Thai employer. An employer of record is the common alternative.

Do employers in Thailand have to offer a provident fund?

Generally no. A provident fund is voluntary, while social security contributions are generally mandatory. An employer with 10 or more staff and no provident fund or qualifying scheme falls under the Employee Welfare Fund once its collection starts on 1 January 2027[4].

Who is liable if the provider files late?

The registered employer generally remains liable to the Revenue Department[10]. The contract decides whether penalties caused by provider error are passed back to the provider.

How can a startup estimate the employer cost of a salary?

Add gross salary, the employer's social security contribution, the employer-only Workers' Compensation Fund contribution and any provident fund match. An employer covered by the Employee Welfare Fund also adds its share once collection starts on 1 January 2027[4]. You can also use Settlr Global's Payroll Tax Calculator for a planning estimate.

About Settlr Global

Settlr Global is the operating arm of WOWS Global, a Singapore-incorporated corporate advisory and investment banking group, and an all-in-one platform for company setup, accounting and tax, payroll, visas and Employer of Record in Thailand. It brings those services under a single team, so founders do not have to coordinate separate local agencies. The platform has processed payroll and compliance work for 200+ clients across 15+ countries, from early-stage startups to established multinational enterprises. Its Employer of Record service lets companies hire in Thailand in about two days, with or without a local entity.

To check your current payroll setup against these 10 questions, talk to the Settlr Global team at settlrglobal.com.

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