Reverse GST/HST/PST Calculator
Find the pre-tax price from a total that includes taxes. Select your province and enter the total amount to instantly calculate the pre-tax price.
Reverse GST/HST/PST Calculator
Calculate the pre-tax price from a total that includes all Canadian sales taxes. Works for all provinces and territories — GST, HST, PST, and Quebec's QST.
This calculator provides estimates based on 2026 Canadian tax brackets and rates. Results are for informational purposes only and should not be considered as professional tax, financial, or legal advice. Tax laws are complex and individual circumstances vary. Please consult with a qualified tax professional, accountant, or the Canada Revenue Agency (CRA) for accurate tax calculations and advice specific to your situation.
Frequently Asked Questions
What is the difference between GST, HST, and PST?
GST (Goods and Services Tax) is a federal tax applied nationwide. PST (Provincial Sales Tax) is applied by some provinces. HST (Harmonized Sales Tax) combines GST and PST into a single rate and is used in several provinces including Ontario, Nova Scotia, and Newfoundland & Labrador.
Does this calculator work for Quebec QST?
Yes. Quebec uses QST (Quebec Sales Tax) instead of PST. This calculator supports Quebec and accounts for its unique QST rate.
How do I use the reverse calculator?
Enter the total price you paid (including tax) and select your province. The calculator will automatically subtract the tax and show you the pre-tax price.
Can I use this calculator in forward mode?
Yes. You can enter a pre-tax price and select your province to calculate the total including tax. Toggle between reverse and forward modes as needed.
Are the tax rates current?
Yes, we update our tax rates regularly to match current federal and provincial rates. However, always verify critical calculations with official CRA or provincial government resources.