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Thai specific business tax calculator

Calculate specific business tax and the local tax add-on from a checked revenue base and rate.

Limited scopeHigh-impactRevenue Code sections 91/5–91/6 · Confirm the applicable rate
Saves this tool's name on this device only (up to 20). No form values.
Only visible result text is included. Form fields are not read. Review sensitive values before sharing.

The tool does not decide whether an activity is taxable, exempt, reduced or which revenue base applies. Select a rate only after checking Revenue Code sections 91/5–91/6.

Enter values, then process to see the result.

How to use it

  1. Confirm that the stated scope applies.
  2. Enter the checked base and select the applicable option.
  3. Review the breakdown, source and exclusions.

Important limitation

Confirm the activity, revenue base, exemptions and effective rate before relying on the result.

The interactive form is fully localized in English.

Reviewed 2026-09-16; next review 2026-12-16.

The section 91/6 rates and ten-percent local-tax arithmetic have been checked. Activity classification, exemptions, reductions and the correct revenue base remain the user's responsibility.

Sources

ประมวลรัษฎากร มาตรา 91/5–91/6กรมสรรพากร · opens in a new tabRevenue bases under section 91/5 and rates under section 91/6; the user selects a rate after checking the facts.Source checked 2026-09-16
Traceable review record

Review history

Site changelog

This is the recorded review history available in the repository, not an inferred release history. Dates are added only when evidence is recorded.

  1. Current review snapshot recorded

    The section 91/6 rates and ten-percent local-tax arithmetic have been checked. Activity classification, exemptions, reductions and the correct revenue base remain the user's responsibility.

    Method version: review-2026-09-16

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