Quebec Sales Tax Calculator
No sign-up GST + QST shown separately Runs in your browser
Add or remove Quebec’s 5% GST and 9.975% QST on any amount, with each tax on its own line.
Quebec charges 5% federal GST and 9.975% Quebec Sales Tax (QST). Both apply to the price before tax, not to each other. Some goods and services are zero-rated or exempt, so this calculator suits standard-rated sales. Confirm current rules with Revenu Québec before you file anything official.
Why a Quebec sales tax calculator needs two tax lines
An old guide once told me to apply Quebec’s QST on top of the GST-inclusive price. I followed it and quoted a client C$1,154.74 on a C$1,000 job. The correct total was C$1,149.75. That small gap made my quote look wrong, and I had to explain why.
The guide was out of date. Since 2013, Quebec applies QST to the price before GST. A Quebec sales tax calculator that follows the current rule keeps your quotes accurate.
How the Quebec sales tax calculator works
Quebec charges two taxes on most standard-rated sales:
- GST: 5%. This is the federal tax that applies across Canada.
- QST: 9.975%. This is Quebec’s own provincial tax.
Together they make 14.975%. The calculator applies both taxes to the same price before tax. It then shows each one on its own line.
How to use the Quebec sales tax calculator
- Enter your amount.
- Choose “Add tax” to start from a price before tax. Choose “Remove tax” to start from a total that already includes both taxes.
- Read the breakdown: price before tax, GST, QST, and the total.
Real example: On a C$1,000 invoice, GST is C$50 and QST is C$99.75. The total is C$1,149.75. To work backward, divide C$1,149.75 by 1.14975 and you return exactly C$1,000. Subtracting 14.975% from the total would give the wrong answer.
Two registrations, not one
Quebec handles its taxes differently from other provinces. Revenu Québec administers both the GST and the QST for Quebec-based businesses, and QST needs its own registration. The small supplier threshold is C$30,000 in taxable sales. The Revenu Québec registration page explains the steps.
If you sell digital products to Quebec customers from outside the province, special registration rules can apply. Our guide on selling digital products internationally covers the wider picture.
A mistake to avoid
Do not add GST first and then apply QST to the new total. That was the pre-2013 method, and it overcharges. Apply both taxes to the price before tax. Also remember that the rate differs from Ontario, which charges a single 13% HST, so never reuse a rate from another province.
For every province on one page, use the Canada GST/HST Calculator. Compare Quebec with the HST provinces on our Ontario HST calculator and Nova Scotia HST calculator pages. For the full comparison, read GST vs HST in Canada. If you bill clients in several countries, read how to invoice international clients. Learn why dividing works in reverse tax calculation, or browse the guides page. You can confirm federal rates on the Canada Revenue Agency’s rate page.
Also see our Quebec sales tax calculator.