Thailand social security contribution estimator
Estimate a Section 33 employee contribution using the displayed wage base, period and confirmed regional relief eligibility.
How to use it
- Confirm that Section 33 employee coverage applies.
- Enter the wage month and confirm eligibility for January–May 2026 regional relief.
- Review the capped wage base, rate and rounding with the Social Security Office.
Important limitation
The nine-province January–May 2026 reduction requires your confirmed registration details. Other special contribution reductions and insured-person sections are outside scope.
The interactive form is fully localized in English.
Reviewed 2026-09-23; next review 2026-12-23.
The 23 September review checked the 2026–2028 Section 33 wage base and SSO-form rounding. The nine-province reduction was checked separately on 27 September.
Sources
กฎกระทรวงกำหนดค่าจ้างขั้นต่ำและขั้นสูงที่ใช้เป็นฐานในการคำนวณเงินสมทบของผู้ประกันตนตามมาตรา 33 พ.ศ. 2568สำนักงานคณะกรรมการกฤษฎีกา · opens in a new tabSupports the THB 1,650–17,500 wage base for 2026–2028, including only the confirmed nine-province January–May 2026 reduction.Source checked 2026-09-23แบบ สปส.1-10 ส่วนที่ 2 คำชี้แจงข้อ 4สำนักงานประกันสังคม · opens in a new tabUsed only for half-baht-up contribution rounding, not the old wage ceiling printed on the form.Source checked 2026-09-23ประกาศกระทรวงแรงงาน เรื่อง ลดหย่อนเงินสมทบในท้องที่ประสบภัยพิบัติ พ.ศ. 2569ราชกิจจานุเบกษา · opens in a new tabSupports the 3% employee rate for confirmed employer and insured-person registrations in nine provinces, January–May 2026.Source checked 2026-09-27Review history
Dates describe the review scope recorded below. A page update does not mean every source was checked again.
- Added nine-province contribution relief
The gazetted 3% employee rate covers December 2025–May 2026 in nine provinces. This tool's dataset supports January–May 2026 and requires confirmed eligibility; an unknown status stops the result.
- Bounded Section 33 wage months
Requires a wage month from January 2026 through December 2028 and rejects unsupported months; checked the gazette page for effective date and wage-base tiers, with boundary regressions.
- Last recorded source/method review
The 23 September review checked the 2026–2028 Section 33 wage base and SSO-form rounding. The nine-province reduction was checked separately on 27 September.