Canada GST Calculator
The Canada GST calculator uses the federal rate of 5%. It does not calculate HST or provincial sales tax. Provinces that charge HST often combine the taxes at 13% or 15%.
Canada standard GST 5%
Price
Total
CA$105.00
Net
CA$100.00
GST
CA$5.00
Formula
Tax added to a price is the price times 5 divided by 100. The total is the price plus that tax.
Tax removed from a price that already includes it is the price divided by 1 plus the rate. The tax is the difference between the price you typed and the net.
This page uses the 5% federal GST. It does not calculate provincial sales tax or HST. Provinces that charge HST often combine GST and the provincial tax at 13% or 15%.
Add: tax = amount × rate / 100. Remove: net = amount / (1 + rate / 100).
- amount The price you type, either before tax or including it.
- rate The standard GST rate for Canada, 5%. It is fixed on this page.
Worked example
A price of CA$100.00 before GST at 5% adds CA$5.00 of tax. The total is CA$105.00.
Removing GST from CA$105.00 leaves a net of CA$100.00.
FAQ
How do I add 5% GST in Canada?
Multiply the price before tax by 5 and divide by 100. On CA$100.00, the tax is CA$5.00 and the total is CA$105.00.
How do I remove GST from a price in Canada?
Divide the tax-inclusive price by 1 + 5/100. On CA$105.00, the net is CA$100.00 and the tax is CA$5.00.
Does the Canada page use reduced rates?
No. It uses the 5% federal GST. It does not calculate HST or provincial sales tax.
Related calculators
Rate checked November 11, 2026 against Canada Revenue Agency.
This page uses the 5% federal GST. It does not calculate provincial sales tax or HST. Provinces that charge HST often combine GST and the provincial tax at 13% or 15%.