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Thailand VAT GST Sales Tax Calculator

Free Thailand vat gst sales tax calculator with country-specific defaults and clear step-by-step results.

About Thailand VAT GST Sales Tax Calculator

Computes VAT/GST/sales tax on a price, and can work backwards from a tax-inclusive total to find the pre-tax base.

Formula

Formula

Total = base × (1 + rate) or Base = total / (1 + rate)

Worked example

With the default values below, Thailand VAT GST Sales Tax Calculator returns Tax Amount of THB 10.00. Change any input above and every figure here is recalculated in your browser.

Inputs used

Price Before Taxminimum 0 THB
100 THB
VAT / GST / Sales Tax Rateaccepts 0–100 %
10 %
Include Tax in Price
No

Results

Tax Amount
THB 10.00
Total Price
THB 110.00
Base Price
THB 100.00

Step by step

  1. 1Values used
  2. 2Formula
  3. 3Tax Amount= $10.00
  4. 4Total Price= $110.00
  5. 5Base Price= $100.00

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, fees or charges or compounding frequency into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Check the applicable Thailand VAT/GST/sales-tax rate — rates vary by product and region.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Check the applicable Thailand VAT/GST/sales-tax rate — rates vary by product and region.

Frequently Asked Questions

How does this calculator work?

Computes VAT/GST/sales tax on a price, and can work backwards from a tax-inclusive total to find the pre-tax base.

Are the figures specific to Thailand?

Retailers and shoppers both need the tax-inclusive total and the pre-tax base to compare prices and invoice correctly.

Related Calculators

Thailand specifics

Currency
฿ THBThai Baht
Region
Asia
Country code
TH
Amounts look like
THB 1,234,567.89
Dates look like
Mar 9, 2026
Units
metricWeek starts Sunday

Results on this page are expressed in THB (Thai Baht). Figures are estimates for general planning — confirm current rates and thresholds with the relevant Thailand authority before relying on them.

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Thailand VAT GST Sales Tax Calculator | Calcrivo