Business and Financial Tools

Thai Government Teacher Gratuity and Pension Calculator

Compare a one-time gratuity and monthly pension from birth date, service start date, GPF status, and salary bases, with related benefits shown separately and no entered data stored.

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Private retirement-benefit estimate

Thai Government Teacher Gratuity and Pension Calculator

Enter a birth date, service start date, membership status, and official salary figures. The page calculates locally and does not save the values.

Local calculation
Gratuity and pension are alternatives

The two headline amounts are shown side by side for comparison. They must not be added together. A GPF balance is separate and must be confirmed with GPF.

Service information

Use the final salary and 60-month average from official salary history. Position allowances are not inserted because they are not automatically part of these formula bases.

Retirement and service estimate

Last service day—
Calendar service—
Service used in formula—

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Option A

One-time gratuity

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Final salary × service used in the applicable formula

Option B

Monthly pension

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Estimated cost-of-living allowance (Chor.Khor.Bor.)
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Pension plus estimated allowance
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Entered GPF balance (separate)
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If the pension option is chosen

Maximum living gratuity from the formula — Pension × 15, capped at THB 500,000
Before age 65—Cumulative cap THB 200,000
At age 65—Additional amount; cumulative cap THB 400,000
At age 70—Remaining amount; cumulative cap THB 500,000
Inheritance gratuity after the full living gratuity has been received —
Inheritance gratuity before any living gratuity has been received —

The actual amount is (pension + applicable allowance) × 30 minus living gratuity already received. The tool shows both boundary cases because the amount already received is unknown.

Quick answer

How are a Thai government teacher's gratuity and pension calculated?

For a GPF member, the gratuity is final salary times fractional service, while pension is the final 60-month average salary times fractional service divided by 50 and capped at 70% of that average. For a non-member, both calculations use whole service years, with a fraction of at least six months rounded up, and pension is capped at final salary. Gratuity and pension are alternatives, not amounts to add together.

How to use this tool

  1. Enter the birth date and service start date in the Gregorian calendar; the tool shows the estimated final service day and calendar service.
  2. Choose GPF status and enter the official final salary. A GPF member must also enter the official final 60-month average salary.
  3. Read the eligibility status before comparing the one-time gratuity with the monthly pension, and never add the two alternatives together.
  4. Review exclusions such as double service and non-countable periods, then confirm the result with the employing agency, Comptroller General's Department, and GPF.

How the calculation works

The tool estimates the final service day under fiscal-year retirement rules and separates calendar service into years, months, and days. A GPF member uses years + months/12 + days/360; a non-member uses whole years with a fraction of at least six months rounded up. It then calculates gratuity = final salary × applicable service and pension = salary base × applicable service ÷ 50, applying the relevant cap. For a pension-eligible case it estimates the allowance that would bring a sole pension to THB 11,000 per month, living gratuity at 15 times pension capped at THB 500,000, and inheritance-gratuity boundaries before and after full living gratuity.

Examples

Example Input Expected result
GPF member matching the source-page example 
Born 1 Jan 1960, service from 1 May 1987, final salary THB 58,000, 60-month average THB 52,000
 Final service day 30 Sep 2020; service 33 years 4 months 29 days = 33.4139 years; gratuity THB 1,938,006.20; pension THB 34,750.46/month
Non-GPF member with a fraction under six months 
The same dates give 33 years 4 months 29 days of service, with a final salary of THB 58,000
 Both formulas use 33 years; gratuity THB 1,914,000.00; pension THB 38,280.00/month
Cost-of-living allowance with only one pension 
Calculated pension THB 8,000/month and no other pension or existing allowance
 Estimated allowance THB 3,000/month, bringing the combined amount to THB 11,000/month

Limitations

  • The calculator covers age or mandatory retirement from appointment to the estimated retirement date; it does not cover early resignation, disability, replacement, dismissal, or death.
  • Calendar service does not add double service or subtract unpaid leave, suspension, non-countable study or duty periods, or prior-service and re-entry adjustments.
  • Final salary, 60-month average salary, and GPF balance are user-entered. The tool does not project salary progression or automatically add academic-standing or special allowances.
  • The allowance estimate assumes the calculated pension is the only pension or allowance amount. Other eligible amounts must be combined under the governing rule.
  • Living gratuity must be claimed and is age-dependent. Inheritance gratuity also depends on the amount already received, eligible heirs or designee, and other conditions.
  • This is not an official entitlement decision, legal advice, financial advice, or a government-certified amount.

Frequently asked questions

Can a person receive the gratuity and pension together?

Not as the same retirement-benefit choice. This page places the one-time gratuity and monthly pension side by side only for comparison. A GPF payment is separate, and its components depend on whether gratuity or pension is chosen.

Why does non-GPF service use a different rule?

The Comptroller General's Department guide uses whole years for a non-member, dropping a fraction under six months and rounding a fraction of at least six months up to one year. GPF service includes fractional months and days as months/12 and days/360.

Are academic-standing and special allowances added automatically?

No. The tool accepts only salary bases entered from evidence because not every additional payment is part of the applicable salary base. Use the agency-certified final salary and 60-month average.

What retirement year applies to a person born on 1 October?

Official age-counting practice treats a person born on 1 October as reaching age 60 on 30 September, so the tool uses that 30 September as the final service day. A birth date after 1 October moves to the following fiscal year end.

Why are two inheritance-gratuity amounts shown?

The formula deducts living gratuity already received, which is unknown. The tool therefore shows the boundary before any living gratuity and after the full eligible amount; an actual result may fall between them.

Can this estimate be filed as an official claim?

No. Confirm service, salary bases, eligibility, and payable amounts with the employing registrar, Comptroller General's Department, and GPF where applicable.

References

  1. Comptroller General's Department — Retirement preparation and gratuity/pension formula guide Verified 2026-08-13
  2. Royal Gazette — Pensioner cost-of-living allowance Royal Decree No. 17, B.E. 2567 Verified 2026-08-13
  3. Government Pension Fund — Membership and termination-benefit FAQ Verified 2026-08-13
  4. Office of the Civil Service Commission — Personnel records and retirement control Verified 2026-08-13

Content and calculation method last reviewed:

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