Canadian Sales Tax Calculator FAQ
To add Canadian sales tax, use tax = net price × rate and gross price = net price × (1 + rate). To remove tax from a total, use net price = gross price / (1 + rate). The calculator applies the correct GST, HST, PST, QST, or RST combination based on the selected province.
Enter the price before tax, select the province, and the calculator multiplies the amount by the combined applicable rate. In HST provinces it uses one harmonized rate. In other provinces it shows separate GST and provincial tax amounts where applicable.
Enter the final price including tax and divide it by (1 + rate) to get the pre-tax amount. The tax amount is then gross price - net price. This is useful for reverse sales tax calculations when you only know the total on a receipt or invoice.
Yes. If an item costs $100 before tax in a province with a total rate of 13%, then tax = 100 × 0.13 = $13 and the total is $113. If you start with the total $113, the reverse calculation is 100 = 113 / 1.13, so the tax amount is still $13.
GST is the federal Goods and Services Tax. HST is a harmonized tax used in some provinces. PST is a provincial sales tax, QST is Quebec Sales Tax, and RST is Manitoba's Retail Sales Tax. Depending on the province, the final tax may be a single HST rate or a combination of GST and a provincial rate.
Because Canada does not use one single sales tax system across all provinces. Ontario and several Atlantic provinces use HST, while provinces such as British Columbia, Saskatchewan, Manitoba, and Quebec use separate federal and provincial sales taxes.
Use the before-tax field when you know the item price and want to add sales tax. Use the after-tax field when you know the final total and want to back out the tax and original price.
It is useful for shopping, bookkeeping, invoices, point-of-sale checks, travel budgets, online pricing, and any situation where you need the tax-inclusive or tax-exclusive amount for a Canadian province.
Select the province, enter the gross (after-tax) sales amount in the price after tax field, and the calculator instantly splits out the exact GST, HST, or PST portion along with the pre-tax amount.
Enter the invoice subtotal in the before-tax field and select the customer's province. The calculator shows the GST amount (or combined GST/HST amount in harmonized provinces) to add to the invoice, along with the final total.
