From 1 October 2026, a new mandatory payroll contribution arrives for most of the Thai private-sector employers: the Employee Welfare Fund (EWF). It sits alongside Social Security, not instead of it, and unless you already run a qualifying provident fund, it applies automatically the moment you cross the headcount threshold.

This isn't a new announcement. The EWF was written into the Labour Protection Act back in 1998 but never implemented. The Cabinet first set it in motion for October 2025, then pushed the start back a year to ease the burden on businesses navigating tariffs, minimum wage increases, and a difficult economic climate. October 2026 is now the confirmed date, and the contribution rates that go with it are already fixed.

This article covers who has to join, how the contribution is calculated and filed, the exemptions that apply, and what the penalties look like if you get registration or payment wrong.

What the Fund Actually Does

The EWF is a forced savings scheme, not an insurance product and not a tax. Every month, a small percentage of each covered employee's wage is deducted from their pay and matched by an equal employer contribution. The combined amount sits in an account in the employee's name, growing with interest, until they leave the job — through resignation, retirement, termination, or death — at which point it's paid out as a lump sum.

The intent is to give workers a short-term cash buffer between jobs, particularly the ones who fall outside Thailand's existing severance and unemployment protections: workers without long service, those let go without compensation, and informal or short-tenure staff who rarely qualify for much else.

Who Has to Register

Registration is mandatory for any private employer with 10 or more employees as of 1 October 2026, regardless of whether staff are Thai nationals or foreign, as both are counted toward the threshold and both are covered.

There are two ways out. The first is the provident fund exemption: if you already operate a Provident Fund in compliance with the Provident Fund Act (or an equivalent welfare arrangement recognized by the relevant authorities) that covers your employees, including those on probation, you're not required to also run the EWF. The exemption is conditional, not automatic. A provident fund that quietly excludes probationary or temporary staff won't qualify for those individuals, and the gap between "we offer a provident fund" and "every employee is actually covered by one" is exactly where employers tend to get caught out.

The second is a fixed list of exempt categories, regardless of headcount or provident fund status:

• Fisheries businesses or related work
• Household work not connected to business operations
• Non-profit organizations
• Private schools — specifically directors, teachers, and education personnel
• Private higher education institutions
• State enterprises

If none of the above applies and you don't have a qualifying scheme in place before the deadline, registration with the EWF isn't optional: it happens by law the moment you have 10 staff on the books.

The Contribution Math

From 1 October 2026 to 30 September 2031, the rate is 0.25% of monthly wages, paid by both employer and employee — so 0.5% of payroll in total per covered employee. From October 2031, both sides step up to 0.5%, taking the combined cost to 1%.

There is currently no wage ceiling on the calculation, unlike Social Security's capped contribution base. The 0.25% applies to the full monthly wage, including regular allowances and commissions — so the cost scales with payroll, not just headcount.

A concrete example: an employee earning ฿25,000 a month has ฿62.50 deducted from their pay, matched by ฿62.50 from the employer — ฿125 a month total, or ฿1,500 a year, just for that one employee.

How the Submission Works

• Deduct the employee's 0.25% from wages each pay cycle.
• Add the employer's matching 0.25%.
• File the monthly contribution report (form Sor.Kor.Lor 3) listing each employee and the amounts.
• Submit payment and the form to the Department of Labour Protection and Welfare (DLPW) by the 15th of the following month.
• Keep the receipt issued on successful payment; it's your proof of compliance in an inspection.

This is a new monthly filing obligation on top of Social Security, not a variation of an existing one.

What It Costs to Not Comply

Late payment: a 5% per month surcharge on the outstanding amount which is far steeper than the 1.5% monthly surcharge structure under the Revenue Code, and it starts accruing immediately, not after a grace period.

Failure to register or misreporting: failing to submit the employee list form, failing to notify changes within the required time frame, or providing false information can carry imprisonment of up to six months, a fine of up to ฿10,000, or both, and where the offender is a company, the penalty extends personally to the director or manager responsible for the failure, not just the entity.

Both penalties attach to the employer, not the employee, and both are avoidable purely through administrative diligence. There's no estimation judgment call involved like there is with mid-year tax. The exposure here is entirely about whether the paperwork is submitted on time.

What to Do Before October 2026

1. Confirm your headcount. If you're at or near 10 employees, model what happens if you cross the threshold in the coming months as the obligation activates as soon as you do, not at your next renewal date.
2. Check whether your business falls into an exempt category (fisheries, non-profit, private education, state enterprise, etc.) or whether you need to rely on a provident fund. If it's the provident fund route, audit actual coverage and not just existence for probationary, part-time, and contract staff, since gaps there void the exemption for those specific individuals even if the fund itself qualifies.
3. Decide, deliberately, whether EWF participation or a provident fund is the better fit. A provident fund usually costs more (2%–15% matched contributions versus 0.25%) but comes with tax benefits the EWF doesn't offer at all, or at least that were not announced yet.
4. Build the 0.5% combined payroll cost into your 2026–27 budget now, and update payroll systems and employment contracts so the deduction is ready to run from the first October pay cycle.
5. Set up the monthly Sor.Kor.Lor 3 filing process and the 15th-of-the-month deadline as a standing item, treat it as a new recurring obligation, not an add-on to existing Social Security filing.

Getting payroll and compliance ready for the EWF, alongside your existing Social Security and tax obligations, is the kind of ongoing administration we handle for clients as part of our accounting and payroll packages.