GST QST Calculator

Quebec Sales Tax (GST and QST) Overview

In Quebec, Canada, consumer transactions and business sales are subject to two distinct sales taxes: the federal Goods and Services Tax (GST) and the provincial Quebec Sales Tax (QST).

GST and QST Tax Rates in Quebec

The current sales tax rates applicable in Quebec are:

• GST (Federal): 5.0%
• QST (Provincial): 9.975%
• Combined Tax Rate: 14.975%

Formula to Calculate GST and QST

Both GST and QST are calculated directly on the subtotal (net price before taxes):

$$\text{GST Amount} = \text{Net Price} \times 0.05$$

$$\text{QST Amount} = \text{Net Price} \times 0.09975$$

$$\text{Total Price (Gross)} = \text{Net Price} \times (1 + 0.14975)$$

Reverse Tax Calculation (Gross to Net)

To find the net amount before tax from a total price including taxes:

$$\text{Net Price} = \frac{\text{Gross Total}}{1.14975}$$