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🇨🇦 Reverse Sales Tax Calculator - Canada

Compute reverse sales taxes (GST, HST and PST) across all Canadian provinces for free. Updated for year 2025.

Calculate Pre-Sales Tax Amount

Not Sure of the Provincial tax rates? Check here

$
CAD

GST, HST and PST Tax Rates of 2025 for all Canadian provinces (source: CRA)

Province GST HST PST
1. Alberta
5%
-
-
2. British Columbia
5%
-
7%
3. Manitoba
5%
-
7%
4. New Brunswick
-
15%
-
5. Newfoundland and Labrador
-
15%
-
6. Northwest Territories
5%
-
-
7. Nova Scotia
-
14%
-
8. Nunavut
5%
-
-
9. Ontario
-
13%
-
10. Quebec
5%
-
9.975%
11. Prince Edward Island
-
15%
-
12. Saskatchewan
5%
-
6%
13. Yukon
5%
-
-

Example Scenarios

Québec uses both GST (5%) and QST (9.975%), for a combined tax rate of 14.975%. When your customer gives you a tax-included total, you can work backwards using a single step.


Simple formula


  • Pre-tax amount = Total ÷ 1.14975
  • Tax = Total − Pre-tax

Example scenario


You invoice a Québec customer and the final total comes to $344.47. You want to know the pre-tax amount.


  • Pre-tax = $344.47 ÷ 1.14975 ≈ $300.00
  • Total tax = $344.47 − $300 = $44.47

The $44.47 tax includes:


  • GST (5%): $15.00
  • QST (9.975%): $29.47

Your questions, answered

Answers to the most frequently asked questions.

A reverse sales tax calculator helps you determine the pre-tax (before tax) amount from a total price that includes sales tax (GST, HST, or PST). It’s useful when you only know the final amount paid.