GST & QST Calculator
Quebec taxes calculated instantly. Before or after tax — your choice.
$
$0.00Subtotal
$0.00GST (5%)
$0.00QST (9.975%)
$0.00Total
%
person
How Quebec Taxes Work
Quebec applies two separate taxes on most goods and services. The GST (Goods and Services Tax) is a federal tax of 5%, while the QST (Quebec Sales Tax) is a provincial tax of 9.975%. Importantly, QST is calculated on the subtotal — not on the subtotal plus GST. The effective combined rate is 14.975%.
- GST: 5% × subtotal
- QST: 9.975% × subtotal (not on GST)
- Tip (when applicable): calculated on subtotal — Quebec standard
Frequently Asked Questions
Is QST calculated on top of GST?
No. In Quebec, QST (9.975%) is calculated on the subtotal only — not on the subtotal plus GST. This is a common misconception. Both the GST and QST are applied independently to the original pre-tax price, resulting in a combined effective rate of 14.975%.
What goods are exempt from GST and QST in Quebec?
Basic groceries (unprocessed food), prescription drugs, most medical devices, and certain financial services are exempt from both GST and QST. Residential rent is also generally exempt. Always verify with Revenu Québec for your specific situation.
Should I tip on the pre-tax or post-tax amount in Quebec?
The Quebec standard is to tip on the pre-tax subtotal. A common shortcut used by Quebecers: tip roughly double the QST amount shown on your bill (2 × 9.975% ≈ 20%). This is fast and results in an appropriate tip without needing a calculator.
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