Thailand Social Security 2026: Section 33 Wage Cap & Rates
Updated: 1 day ago
Thailand Social Security contributions 2026 changed in a way that directly impacts payroll cost, monthly deductions, and budgeting for foreign SMEs operating in Thailand. A Ministerial Regulation published in the Royal Gazette adjusts the minimum and maximum monthly wage base used to calculate Social Security contributions for insured persons under Section 33, effective 1 January 2026.
This article explains the key legal change, how it affects contribution caps, and what to do if you operate in provinces covered by a temporary disaster relief reduction in contribution rates from December 2025 to May 2026.
Jurisdiction: Thailand
Last reviewed: aligned with Thai law and practice as at 5 March 2026.
Key takeaways
From 1 January 2026, the Section 33 wage base ceiling for Social Security contribution calculation is set at THB 17,500 per month for 2026-2028, with later phased increases.
The Ministerial Regulation also sets the minimum wage base at THB 1,650 per month and repeals the prior Ministerial Regulation No. 7 (1995) for this purpose.
In 9 disaster-affected southern provinces, a Cabinet-approved measure reduces Section 33 employer and insured person contribution rates from 5 percent to 3 percent for 6 months from December 2025 to May 2026, while the government contribution remains 2.75 percent.
Many employers operationally treat Social Security remittance as due by the 15th of the following month, and should confirm current SSO practice for their location and channel.
A payroll compliance pack for Thailand Social Security contributions 2026 should include wage base controls, rate controls, and province-specific eligibility checks.
What changed in 2026: the Section 33 wage base ceiling and minimum
A Ministerial Regulation (Royal Gazette dated 12 December 2025) sets the monthly minimum and maximum wages used as the base for calculating contributions for each insured person under Section 33, effective 1 January 2026.
Under the regulation:
1 January 2026 to 31 December 2028: minimum THB 1,650 and maximum THB 17,500 per month
1 January 2029 to 31 December 2031: minimum THB 1,650 and maximum THB 20,000 per month
From 1 January 2032 onward: minimum THB 1,650 and maximum THB 23,000 per month
This is the wage base used for contribution calculation, not the legal minimum wage for employment.
Thailand Social Security contributions 2026 and how to calculate the new caps
For most foreign SMEs, the practical question is: what is the maximum monthly contribution per employee after the wage ceiling changes?
Step 1: Identify which wage base applies
Use the Section 33 wage base cap that applies to the period. For 2026-2028, the maximum wage base for calculation is THB 17,500 per month.
Step 2: Apply the contribution rate that applies to your case
There are two rate scenarios you may see in 2026:
Standard scenario: 5 percent employer and 5 percent insured person. The Ministry of Labour confirms a baseline where Section 33 insured persons and employers pay 5 percent of wages per month, with the government contribution at 2.75 percent.
Temporary disaster relief scenario in specified provinces: 3 percent employer and 3 percent insured person. For 6 months from December 2025 to May 2026, the Ministry of Labour states the Section 33 employer and insured person contribution rate is reduced from 5 percent to 3 percent in the covered areas, while the government rate remains 2.75 percent.
Covered provinces stated by the Ministry of Labour: Trang, Nakhon Si Thammarat, Narathiwat, Pattani, Phatthalung, Yala, Songkhla, Satun, and Surat Thani.
Step 3: Translate the wage ceiling into a maximum monthly contribution amount
For 2026-2028, wage base ceiling is THB 17,500.
At 5 percent: maximum employer contribution is THB 875, and maximum insured person contribution is THB 875 (5 percent of 17,500).
At 3 percent (temporary relief scenario): maximum employer contribution is THB 525, and maximum insured person contribution is THB 525 (3 percent of 17,500).
Important practical note: Government contribution is described as 2.75 percent of wages per month by the Ministry of Labour; rounding and payment mechanics can be system-dependent, so verify your payroll outputs against the SSO payment channel you use.
When do you pay: monthly operational deadline control
Government guidance for investors commonly states that Social Security contributions should be paid by the 15th of the following month. Because local practice and channels can vary, treat this as an operational control rule and confirm your exact submission and payment process with the Social Security Office branch or official e-service workflow for your establishment.
Common misconceptions
Misconception: The new THB 17,500 number is Thailand minimum wage.
Correction: It is the wage base ceiling used to calculate Section 33 Social Security contributions, set by Ministerial Regulation.
Misconception: Contribution rates are always 5 percent in 2026.
Correction: The Ministry of Labour states a temporary reduction from 5 percent to 3 percent for employers and insured persons applies for 6 months from December 2025 to May 2026 in 9 specified provinces, while government contribution remains 2.75 percent.
Misconception: If payroll is small, you can ignore Social Security until year end.
Correction: Social Security is run as a monthly withholding and remittance cycle. Use a monthly deadline control and evidence pack approach.
Worked scenarios: safe, conditional examples
Scenario 1: Bangkok based SME, employee salary THB 60,000 per month, March 2026
Short answer: The contribution calculation wage base is capped, so the ceiling drives the maximum contribution amounts.
Expanded: For 2026-2028, wage base cap is THB 17,500. Under a standard 5 percent employer and 5 percent insured person baseline, max is THB 875 each. Confirm whether any special temporary measure applies to your establishment location.
Scenario 2: SME establishment in Songkhla, February to May 2026
Short answer: A temporary relief measure may reduce the rate from 5 percent to 3 percent for 6 months in specified provinces.
Expanded: If your establishment is in a listed province and meets the scope of the ministerial regulation to be issued and published, your payroll may reflect 3 percent employer and 3 percent insured person during the stated period, with government remaining 2.75 percent. Keep documentation of applicability and period mapping.
Compliance checklist artifact: Thailand Social Security contributions 2026
A) Wage base controls: Confirm the payroll period falls within 2026-2028 wage base cap THB 17,500 and minimum THB 1,650 for Section 33 contribution calculation. Ensure payroll system wage base ceiling is updated from 1 January 2026.
B) Rate controls: Default to baseline 5 percent employer and 5 percent insured person unless a specific lawful temporary measure applies. If operating in Trang, Nakhon Si Thammarat, Narathiwat, Pattani, Phatthalung, Yala, Songkhla, Satun, or Surat Thani, check whether the 3 percent temporary reduction applies to your establishment and month.
C) Monthly deadline controls: Set a recurring calendar control to prepare and remit contributions by the operational due date your channel uses, commonly described as the 15th of the following month.
D) Evidence pack controls: Archive monthly: payroll register, wage base cap output, rate basis, submission confirmation, and payment confirmation.
FAQ
Q1: What does the wage ceiling change mean for Thailand Social Security contributions 2026?
A: It means the Section 33 wage base used to calculate contributions is capped at THB 17,500 per month for 2026-2028, effective 1 January 2026.
Q2: What are the wage base phases after 2026?
A: The Ministerial Regulation sets 2026-2028 maximum THB 17,500, 2029-2031 maximum THB 20,000, and from 2032 maximum THB 23,000.
Q3: Are contribution rates always 5 percent in 2026?
A: Not always. The Ministry of Labour describes a temporary reduction from 5 percent to 3 percent for employers and insured persons in 9 specified provinces for December 2025 to May 2026.
Q4: Which provinces are covered by the temporary reduced rate measure?
A: Trang, Nakhon Si Thammarat, Narathiwat, Pattani, Phatthalung, Yala, Songkhla, Satun, and Surat Thani.
Q5: What is the maximum employer contribution in 2026 under the new wage ceiling?
A: If applying a 5 percent employer rate and wage base cap THB 17,500, the maximum employer portion is THB 875 per month.
Q6: When are Social Security contributions paid each month in Thailand?
A: They are handled as a monthly remittance cycle and commonly described as due by the 15th of the following month.
Q7: Do I need to change my payroll system settings for 2026?
A: Yes, update your Section 33 wage base ceiling to THB 17,500 effective 1 January 2026.
Q8: What should foreign SMEs keep for audit and inspection readiness?
A: Keep a monthly evidence pack: wage base cap report, rate basis, payroll register, and submission and payment confirmations.
Glossary
Section 33: Insured person category referenced by the wage base Ministerial Regulation for contribution calculation.
Wage base ceiling: Maximum monthly wage amount used to calculate contributions, set at THB 17,500 for 2026-2028.
Wage base minimum: Minimum monthly wage base set at THB 1,650.
Employer contribution rate: Percent of wage base payable by employer (standard 5%, temporary 3%).
Insured person contribution rate: Percent of wage base withheld from employee (standard 5%, temporary 3%).
Call to action (GENTLE LAW IBL)
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