Tax calculator

Thailand VAT and Withholding Tax Calculator

Calculate invoice total, withholding, and transfer amount.

Last reviewed: 14 September 2026

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Calculation result
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Calculated in your browser. Values are not sent to ThaiUtility.

Quick answer

Select VAT status and withholding rate separately.

Formula

Invoice total = base + VAT; transfer = invoice total − withholding.

Worked example

10,000 baht, VAT 7%, WHT 3%

Invoice total is 10,700 baht and transfer is 10,400 baht.

Choose this tool when

Use this page when the billing base is known and both VAT and withholding affect the payment flow. Use Net Payment Gross-up when the desired net receipt is known instead.

Assumptions and limitations

  • VAT 0%, VAT-exempt, and outside VAT remain distinct.
  • The tool does not determine status or rate.

Official sources

Last reviewed: 14 September 2026

Review again when the responsible authority changes the rule, rate, or effective period, or when this calculator's assumptions change.

Check the current Thai text and effective dates before relying on a result for tax, billing, employment, or legal purposes.