How to Use This GST/HST Calculator
1Forward Calculation (Add Tax)
Use this mode when you know the pre-tax price and want to calculate the total amount including tax. For example, if a product costs $100 before tax in Ontario (13% HST), the total would be $113.00.
2Reverse Calculation (Remove Tax)
Use this mode when you know the final price (including tax) and want to find the pre-tax amount. This is helpful for reviewing receipts or understanding how much tax you actually paid.
Understanding Canadian Sales Taxes
Canada has a complex sales tax system with different rates across provinces:
GST (5%)
Alberta, NWT, Nunavut, Yukon
HST (13-15%)
ON, NS, NB, NL, PE
GST + PST (11-12%)
BC, MB, SK
GST + QST (14.975%)
Quebec only
Frequently Asked Questions
What is the difference between GST, HST, and PST?
GST is a federal tax of 5%. HST combines GST with provincial tax into a single rate. PST is a separate provincial sales tax that is added on top of GST in some provinces.
Why does Quebec have a different tax system?
Quebec administers its own provincial sales tax (QST), which is calculated on the same sale amount as GST. The QST rate is 9.975%, making the total tax rate 14.975%.
Are these tax rates accurate today?
These rates reflect the latest public rates in effect. Tax rates can change, so always verify with the Canada Revenue Agency for official rates.
Do I need to charge GST/HST on all sales?
Businesses with over $30,000 in annual revenue must register for GST/HST. Small businesses below this threshold may be exempt. Consult the CRA website for specific requirements.