Quebec GST + QST rates in 2026
| GST | 5% |
|---|---|
| QST | 9.975% |
| Combined | 14.975% |
- Quebec charges the 5% federal GST plus the 9.975% Quebec Sales Tax (QST), run by Revenu Québec, for a combined 14.975%.
- QST is calculated on the price before GST, so the two rates simply add up.
How to calculate GST + QST in Quebec
To add tax, multiply the price before tax by 14.975% and add it on. To find the price before tax inside a total, divide the total by 1.14975. Taking 14.975% off the total gives the wrong answer, because the tax was charged on the smaller pre-tax price.
Tax = Price × 14.975 ÷ 100 Price before tax = Total ÷ 1.14975
| Price before tax | $250.00 |
|---|---|
| GST + QST at 14.975% | $37.44 |
| Total | $287.44 |
| A total of $574.88 includes tax of | $74.88 |
| …so the price before tax was | $500.00 |
Quebec GST + QST on common amounts
At 14.975%, this is the tax and the total on everyday prices.
| Price before tax | Tax | Total |
|---|---|---|
| $10.00 | $1.50 | $11.50 |
| $20.00 | $3.00 | $23.00 |
| $50.00 | $7.49 | $57.49 |
| $100.00 | $14.98 | $114.98 |
| $250.00 | $37.44 | $287.44 |
| $500.00 | $74.88 | $574.88 |
| $1,000.00 | $149.75 | $1,149.75 |
| $5,000.00 | $748.75 | $5,748.75 |
How sales tax works in Quebec
Quebec charges the 5% federal GST plus a separate provincial tax (QST at 9.975%). Each is charged on the price before tax, so the rates add up to 14.975%. They are usually shown as separate lines on an invoice, and the provincial tax is registered for and paid to the province.
Most businesses must register for GST/HST once their taxable sales pass $30,000 over four consecutive calendar quarters. The rate you charge depends on where the supply is made, so a sale delivered to another province uses that province's rate.
What your invoice must show
Business customers need the right details on your invoice to claim back the tax they paid. For sales of $30 or more, show your GST/HST registration number and the total tax charged (or state that the price includes it). For sales of $150 or more, also show the buyer's name, the terms of payment and a description of each item. Our invoice generator has fields for all of these.