GST QST Calculator Quebec
Add or remove Quebec sales tax instantly: 5% GST (federal) + 9.975% QST (provincial) = 14.975% combined. Includes a reverse tax calculator and a Canada province comparison mode.
How GST and QST are calculated in Quebec
Quebec is the only province with two separate sales taxes instead of a harmonized HST. Both apply to the pre-tax selling price:
GST = price × 0.05 • QST = price × 0.09975 • Total = price × 1.14975
Quebec tax breakdown — sample amounts
| Price before tax | GST (5%) | QST (9.975%) | Total |
|---|
Frequently asked questions
What is the sales tax rate in Quebec in 2026?
The combined sales tax rate in Quebec is 14.975%: 5% federal GST plus 9.975% provincial QST. Both taxes apply to the price before tax.
Is QST calculated on top of GST in Quebec?
No. Since January 1, 2013, QST is calculated on the selling price before GST, not on the GST-inclusive amount. Both taxes apply directly to the pre-tax price, so they add up rather than compound.
How do I calculate GST and QST on a $100 purchase in Quebec?
Multiply the pre-tax price by each rate: GST is $100 x 0.05 = $5.00, and QST is $100 x 0.09975 = $9.98 after rounding. The total is $100 + $5.00 + $9.98 = $114.98.
How do I remove GST and QST from a tax-included price?
Divide the tax-included price by 1.14975. For example, $114.98 / 1.14975 = $100.00 before tax. The GST is then $5.00 and the QST is $9.98.
What is the combined GST and QST rate — 14.975% or 15%?
Exactly 14.975%: 5% GST + 9.975% QST. It is often rounded to 15% in conversation, but invoices and this calculator use the exact 14.975%.
Who collects GST and QST in Quebec?
The Canada Revenue Agency (CRA) administers the federal GST, and Revenu Quebec administers the provincial QST. In Quebec, businesses generally register for and remit both taxes through Revenu Quebec.
Does Ontario use GST and QST?
No. Ontario uses the Harmonized Sales Tax (HST) at a single rate of 13%, which replaces separate GST and QST charges. Use the Ontario mode above to compare.
How does Quebec sales tax compare to British Columbia?
British Columbia charges 5% GST plus 7% PST (both on the pre-tax price), for a combined 12% — lower than Quebec's 14.975%. Select BC in the province dropdown to compare side by side.
Are all goods and services taxed at the full rate in Quebec?
No. Some supplies are zero-rated or exempt under GST/QST rules (for example, basic groceries are generally zero-rated). This calculator assumes the amount you enter is fully taxable.
Can businesses recover the GST and QST they pay?
Yes. GST/HST registrants can generally claim input tax credits for GST paid on business inputs, and QST registrants can claim input tax refunds for QST, subject to the normal rules.
Do I charge QST on sales to customers outside Quebec?
It depends on the place-of-supply rules: QST generally applies to supplies made in Quebec, while sales to other provinces follow different rules. When in doubt, check the Revenu Quebec guidance for your situation.
Is this GST QST calculator tax advice?
No. This tool provides general tax information for estimation only and is not professional tax advice. Confirm rates and rules with Revenu Quebec, the CRA, or a qualified tax professional before filing or invoicing.
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Disclaimer: this page provides general tax information for estimation purposes only and is not professional tax advice. Rates shown (Quebec GST 5%, QST 9.975%; Ontario HST 13%; BC GST 5% + PST 7%; Manitoba GST 5% + PST 7%; Saskatchewan GST 5% + PST 6%; Atlantic HST 15%; Alberta/territories GST 5%) reflect published 2026 rates; provincial comparison figures are indicative. Always confirm with Revenu Québec, the CRA, or a qualified tax professional.
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