GST, QST and HST calculator Sales tax,
to the cent.
Enter an amount and pick the province: GST, QST or HST and the total appear right away. You can also work backwards from a tax-included amount.
How to calculate GST and QST
In Quebec, both taxes are calculated on the selling price: 5% of GST, then 9.975% of QST on the same price. The QST is not calculated on the GST. Each tax is rounded to the cent, then added to the price.
QST = $100.00 × 9.975% = $9.98
Total = $114.98
Working back from a tax-included amount
Divide the tax-included total by 1 plus the combined rate. In Quebec, that is 1.14975. The taxes are then recalculated on the amount found.
Sales tax rates by province
| Province or territory | Federal or harmonized tax | Provincial tax | Total |
|---|---|---|---|
| Alberta | GST 5% | — | 5% |
| British Columbia | GST 5% | PST 7% | 12% |
| Manitoba | GST 5% | RST 7% | 12% |
| New Brunswick | HST 15% | — | 15% |
| Newfoundland and Labrador | HST 15% | — | 15% |
| Northwest Territories | GST 5% | — | 5% |
| Nova Scotia | HST 14% | — | 14% |
| Nunavut | GST 5% | — | 5% |
| Ontario | HST 13% | — | 13% |
| Prince Edward Island | HST 15% | — | 15% |
| Quebec | GST 5% | QST 9.975% | 14.975% |
| Saskatchewan | GST 5% | PST 6% | 11% |
| Yukon | GST 5% | — | 5% |
General rates in effect, checked on 2026-10-13 with the Canada Revenue Agency and Revenu Québec.
Sales tax questions
What are the GST and QST rates in Quebec?
Is the QST calculated on the GST?
How are the taxes rounded?
Which rate do I charge a client in another province?
Does this calculator apply to every product?
Your quotes and invoices can do this math for you.
In CRM PME, the taxes on every quote and invoice are computed from the client’s province, with your registration numbers printed on the document.
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