Free tool · Rates as of October 2026
Enter a total that already includes tax and get the price before tax, with GST, HST, PST, RST, or QST split out, for any province or territory.
HST applies in Ontario.
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Divide the total by one plus the rate. Sales tax is charged on the price before tax, so a tax-included total is that price multiplied by one plus the rate. Dividing reverses it.
Subtracting the rate from the total does not work. Taking 13% off $113.00 leaves $98.31, not the $100.00 the sale started from.
Where two taxes apply, divide by one plus the combined rate first, then multiply the price before tax by each rate to split the lines.
Divide a tax-included total by this number to get the price before tax.
| Province or territory | Tax | Rate | Divide by |
|---|---|---|---|
| Alberta | GST | 5% | 1.05 |
| British Columbia | GST + PST | 12% | 1.12 |
| Manitoba | GST + RST | 12% | 1.12 |
| New Brunswick | HST | 15% | 1.15 |
| Newfoundland and Labrador | HST | 15% | 1.15 |
| Nova Scotia | HST | 14% | 1.14 |
| Northwest Territories | GST | 5% | 1.05 |
| Nunavut | GST | 5% | 1.05 |
| Ontario | HST | 13% | 1.13 |
| Prince Edward Island | HST | 15% | 1.15 |
| Quebec | GST + QST | 14.975% | 1.14975 |
| Saskatchewan | GST + PST | 11% | 1.11 |
| Yukon | GST | 5% | 1.05 |
A $113.00 receipt in Ontario, where HST totals 13%: $113.00 ÷ 1.13 = $100.00 before tax. HST is $13.00.
A $224.00 receipt in British Columbia, where GST + PST totals 12%: $224.00 ÷ 1.12 = $200.00 before tax. GST is $10.00 and PST is $14.00, for $24.00 of tax in total.
A $114.98 receipt in Quebec, where GST + QST totals 14.975%: $114.98 ÷ 1.14975 = $100.00 before tax. GST is $5.00 and QST is $9.98, for $14.98 of tax in total.
To add tax to a price instead, use the Canadian sales tax calculator.
Divide the total by one plus the HST rate. In Ontario, divide by 1.13: a $113.00 total is $100.00 before tax, with $13.00 HST. In Nova Scotia, divide by 1.14, and in New Brunswick, Newfoundland and Labrador, and Prince Edward Island, divide by 1.15.
Because the tax was calculated on the price before tax, not on the total. Taking 13% off a $113.00 total removes $14.69 and leaves $98.31, which is wrong. Dividing by 1.13 gives the correct $100.00.
Divide the total by one plus the combined rate to get the price before tax, then multiply that price by each rate. In British Columbia, $224.00 ÷ 1.12 = $200.00, so GST is $10.00 (5%) and PST is $14.00 (7%).
Each tax is rounded to the cent when the sale is rung up, so working backwards can land a cent away from the original price. This calculator works out each tax from the pre-tax amount and then sets the price before tax to the total minus the tax, so the lines always add up to the total you entered.
Canadian sales tax calculator (all provinces)
This calculator is for estimates. It does not account for zero-rated or exempt supplies, point-of-sale rebates, or place-of-supply rules for services. Check with the CRA or an accountant for your situation.