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Service guide
Social Security Submissions in Thailand.
Social security in Thailand for employers: SSO registration, monthly contribution submissions due by the 15th, the wage base, and what a payroll firm handles.
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Key facts
- When are social security contributions due?
- By the 15th of the month following the month the wages were paid. The employer submits its own share and the employees' share together with the SSO 1-10 forms.
- What wages do contributions apply to?
- A monthly wage base with a floor of 1,650 baht and a cap of 15,000 baht per employee, as published by the Social Security Office. Above the cap, the contribution stops growing.
- What happens if a submission is late?
- A statutory surcharge of 2% per month applies to the unpaid contributions, so a missed month keeps getting more expensive until it is fixed.
Social security submissions, done properly.
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Social security in Thailand for employers: the monthly duty
Social security in Thailand for employers is a fixed monthly cycle with the Social Security Office (SSO). The employer registers the business and its employees, deducts each employee's contribution from wages, adds the employer's own share, and submits both together with the SSO's contribution forms by the 15th of the following month.
This page covers that SSO leg. The other statutory leg of payroll, withholding tax on salaries remitted to the Revenue Department, runs on separate forms and deadlines: that is payroll tax filing work.
The SSO publishes its rules mainly in Thai, which is one reason companies hand this to a firm from the first hire. The mechanics are simple; missing a month is what gets expensive.
The monthly contribution submission, as the SSO states it
Published by the Social Security Office (Thai). The contribution rate itself is set by ministerial regulation and is not stated on the page, so a firm confirms the current rate.
| What the SSO states | |
|---|---|
| Who submits | The employer remits both the employer's share and the employees' (section 33 insured persons') share together |
| Forms | SSO 1-10 (สปส.1-10), Part 1 and Part 2 |
| Deadline | By the 15th of the month following the month the wages were paid |
| Monthly wage base | A floor of 1,650 baht and a cap of 15,000 baht per employee |
| If late | A statutory surcharge of 2% per month on the unpaid contributions |
- Who submits
- The employer remits both the employer's share and the employees' (section 33 insured persons') share together
- Forms
- SSO 1-10 (สปส.1-10), Part 1 and Part 2
- Deadline
- By the 15th of the month following the month the wages were paid
- Monthly wage base
- A floor of 1,650 baht and a cap of 15,000 baht per employee
- If late
- A statutory surcharge of 2% per month on the unpaid contributions
Source: Social Security Office, contributions and payment
Checked August 2026
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Accounting firmBangkokEnglish · Thai · Filipino · Swedish
Full service accountancy practice registered with the Thai Federation of Accounting Professions delivering accountancy and tax services in English.
From first hire to steady monthly submissions
Register as an employer with the SSO
The firm prepares the SSO's employer registration filing and registers the employees as insured persons. The registration window is short, so this happens alongside the first hire, not after the first pay run.
Deduct the employee share each pay run
Each employee's contribution is calculated on their wage within the SSO's monthly base, a floor of 1,650 baht and a cap of 15,000 baht, and deducted on the payslip. Because of the cap, contributions stop growing above 15,000 baht of monthly wage.
File SSO 1-10 and remit both shares by the 15th
The firm completes both parts of the สปส.1-10 form and submits them with the employer's and the employees' shares by the 15th of the following month.
Keep the roster current
Starters, leavers, and wage changes are reported to the SSO so the submissions match the real headcount. Stale rosters are the most common cause of corrected filings.
What a submissions engagement includes
Social security submissions are almost never sold alone. They ride inside a monthly payroll engagement where the same firm runs the pay calculation, the payslips, the tax withholding, and the SSO filings in one cycle: that bundled service is payroll processing, priced per employee per month.
What matters when comparing payroll firms is scope: whether registrations for new hires, leaver reporting, and corrections are inside the monthly fee, and whether the firm files through the SSO's online channel or on paper. Most accounting firms in Thailand that run payroll handle the SSO leg as standard.
The current contribution percentage is set by ministerial regulation and the SSO's published page does not state it, so a firm confirms the rate in force before the first submission rather than working from a remembered number.
When to hand SSO submissions to a firm
From the first employee, the duty exists and the deadline repeats every month. The employer holds money deducted from wages, and late submission carries a statutory surcharge of 2% per month, so the cost of a firm is usually smaller than the cost of one late filing.
This page is general information, not legal advice. Rates, forms, and deadlines change; for a specific workforce, speak with a qualified professional.
Also listed
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Accounting firmBangkokThai · English · French
Cloud-based accounting, tax filing & payroll for businesses in Thailand. All-inclusive pricing, zero hidden fees, 24/7 online access.
GPS Accounting
Free consultation
Accounting firmBangkokEnglish · Thai · Filipino · Swedish
Full service accountancy practice registered with the Thai Federation of Accounting Professions delivering accountancy and tax services in English.
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Common questions
Frequently asked questions
- What does social security in Thailand require from an employer each month?
- Deducting each employee's contribution from wages, adding the employer's own share, completing both parts of the สปส.1-10 (SSO 1-10) form, and submitting the forms and both shares to the Social Security Office by the 15th of the following month.
- What is the social security contribution rate in Thailand?
- The rate is set by ministerial regulation, and the SSO's published contributions page states the mechanics and the wage base rather than the current percentage. A payroll firm confirms the rate in force before the first submission and applies any temporary reductions the ministry announces.
- Does an employer have to register with the Social Security Office?
- Yes. The SSO publishes an employer registration form, and the business and its employees are registered before contributions can be submitted. The registration window after hiring is short, so firms handle it alongside the first employment contract rather than waiting for the first pay run.
- Are social security submissions the same as payroll tax filing?
- No. Social security contributions go to the Social Security Office on SSO forms by the 15th of the following month. Payroll tax is withheld from salaries and remitted to the Revenue Department on its own return. They are two separate statutory legs of the same payroll cycle, and most payroll firms run both.
All firms
Every firm that can help you with social security submissions
Accounting firmBangkokThai · English · French
Cloud-based accounting, tax filing & payroll for businesses in Thailand. All-inclusive pricing, zero hidden fees, 24/7 online access.
GPS Accounting
Free consultation
Accounting firmBangkokEnglish · Thai · Filipino · Swedish
Full service accountancy practice registered with the Thai Federation of Accounting Professions delivering accountancy and tax services in English.
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