Reverse sales tax calculator
- Price before tax
- $53.09
- HST 13 %
- $6.90
- Total
- $59.99
The calculator opens in Remove tax mode. Pick the province and enter the total with tax included; it shows the price before tax and each tax.
The formula
Price before tax = total ÷ (1 + total tax rate)
| Province | Divide the total by |
|---|---|
| Ontario | 1.13 |
| Nova Scotia | 1.14 |
| New Brunswick, Newfoundland and Labrador, Prince Edward Island | 1.15 |
| Quebec | 1.14975 |
| British Columbia, Manitoba | 1.12 |
| Saskatchewan | 1.11 |
| Alberta and the territories | 1.05 |
Example: an Ontario receipt for 113.00 is 100.00 before HST; a Quebec total of 114.98 is 100.00 before GST and QST.
To add tax instead, switch to Add tax, or use the GST calculator and the province pages: Ontario, Quebec, BC, Alberta.
Questions
How do I calculate tax backwards from a total?
Divide the tax-included total by one plus the total tax rate. In Ontario that's the total ÷ 1.13; in Quebec, ÷ 1.14975; in Alberta, ÷ 1.05.
Why is a plain division sometimes a cent off?
Stores round each tax to the cent separately. Dividing the total gives a price whose taxes can round to a cent more or less than the receipt. The calculator adjusts the price so the taxes add back to the exact total.
How do I reverse HST in Ontario?
Divide by 1.13. A total of 113.00 is 100.00 before HST, and the HST was 13.00.
30-day free trial. No card needed. For stores in Canada.
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