Reverse GST/QST Calculator — Quebec

Enter a Quebec total with tax to find the price before GST and QST, plus each tax amount.

Quick select province / territory
Before tax
$0.00
Tax
$0.00
Total
$0.00

GST/HST paid
$0.00
ITC you can claim
$0.00
Not recoverable
$0.00
Net cost to you
$0.00

Estimate only — ITCs depend on being GST/HST registered and on the purchase being for business use. Check with CRA or your accountant.

Province / territoryRateTaxTotal

Sorted lowest to highest combined rate. Green = lowest, red = highest, outlined = your selected province.

How to back out GST and QST in Quebec

Quebec charges GST of 5% and QST of 9.975%, both calculated on the pre-tax price (QST is not charged on top of the GST). Combined, that is 14.975%, so the divisor is 1.14975.

  1. Step 1: Pre-tax price = total ÷ 1.14975. Example: $229.95 ÷ 1.14975 = $200.00.
  2. Step 2: GST = $200 × 5% = $10.00.
  3. Step 3: QST = $200 × 9.975% = $19.95.
  4. Check: $200 + $10.00 + $19.95 = $229.95 ✓

More on Quebec sales tax and the QST calculator.

Frequently asked questions

What is the combined GST and QST rate in Quebec?
5% GST plus 9.975% QST equals 14.975%. Both are charged on the pre-tax price.
How do I remove GST and QST from a total?
Divide the total by 1.14975 to get the price before tax. GST is 5% of that price and QST is 9.975% of it.
Is QST charged on the GST?
No. Since 2013 QST is calculated on the pre-tax price only, so the two taxes do not compound.

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Rates last checked: September 2026. Sources: Canada Revenue Agency (CRA) GST/HST rate schedule; provincial revenue agencies for PST/RST/QST rates.