Canada Reverse Tax Calculator
Remove GST, HST, PST, or QST from any Canadian price across all 13 provinces and territories.
🇨🇦 Canadian Tax Rates
2026 combined provincial & federal rates
Understanding Canadian Sales Tax (GST, HST, PST, QST)
Unlike the US state sales tax system (which is collected only at the final point of sale), Canada operates on a Value Added Tax (VAT) model. The base federal tax is the GST (Goods and Services Tax) at 5%. Most provinces combine this with a provincial tax to create the HST (Harmonized Sales Tax) at 13% to 15%. Other provinces charge GST and a separate PST (Provincial Sales Tax), while Quebec charges GST and QST (Quebec Sales Tax).
If you're a business owner or consumer trying to extract the exact pre-tax cost from a receipt, you cannot simply subtract the tax percentage from the final total. You must use the reverse tax formula. Our calculator does this instantly for every province.
When you purchase items in Canada, these taxes are automatically added at the register. If you are looking at a final receipt and need to know the original price before tax was applied, our Canada Reverse Sales Tax Calculator allows you to work backwards instantly, no matter which province's tax rules apply to your purchase.
CRA Input Tax Credit (ITC) Reverse Tax Fractions
Under Subsection 169(1) of the Excise Tax Act (ETA), GST/HST-registered Canadian businesses are entitled to recover the tax paid on commercial inputs by claiming an Input Tax Credit (ITC). When a supplier invoice or receipt displays only a tax-inclusive total, the Canada Revenue Agency (CRA) authorizes the use of statutory ITC calculation fractions:
On a $105 receipt, $105 × (5/105) = $5.00 ITC. Pre-tax base is $100.00.
On a $565 receipt, $565 × (13/113) = $65.00 ITC. Pre-tax base is $500.00.
On a $230 receipt, $230 × (15/115) = $30.00 ITC. Pre-tax base is $200.00.
When to Use the Canadian Reverse Tax Calculator
Claiming Input Tax Credits (ITCs)
Canadian businesses can claim Input Tax Credits (ITCs) to recover the GST/HST paid on eligible business expenses. To claim an ITC, you must know the exact amount of GST/HST paid. If your receipt only shows the total, our calculator extracts the precise tax amount required for your CRA return.
Cross-Border Budgeting
If your business operates nationally, reconciling expenses from Ontario (13% HST), British Columbia (5% GST + 7% PST), and Alberta (5% GST) is an accounting headache. Using our province dropdown lets you standardize all inter-provincial receipts back to their base cost instantly.
Verifying Handwritten Receipts
Sometimes receipts from smaller vendors, contractors, or handwritten invoices only show a final total. Our tool helps you instantly verify that the correct tax rate was applied according to your specific province's HST, PST, or QST regulations.
🇨🇦 Dedicated Canadian Provincial & Territorial Calculators
Select any Canadian province or territory below for dedicated reverse tax calculation, CRA Input Tax Credit (ITC) fractions, and statutory rate breakdowns:
Frequently Asked Questions: Canada Taxes
How do I calculate a price before 13% HST in Ontario?+
To manually find the pre-tax price in Ontario, you divide the final total by 1.13. For example, if you paid $113.00 total, you divide by 1.13 to get the original pre-tax price of $100.00. Our calculator does this math for you automatically.
Are groceries taxed in Canada?+
Basic groceries (like milk, bread, and fresh vegetables) are generally "zero-rated" in Canada, meaning they are taxed at 0%. However, snack foods, hot prepared meals, and alcohol are fully taxable under standard GST/HST/PST/QST rules.
Does the calculator work for Quebec's QST?+
Yes! Quebec charges a 5% federal GST and a 9.975% provincial QST, bringing the combined rate to 14.975%. Our calculator natively supports Quebec's unique tax structure.
Why do Alberta and the Territories only charge 5%?+
Alberta, the Northwest Territories, Nunavut, and Yukon do not have a provincial sales tax (PST). Residents and businesses in these areas only pay the federal 5% Goods and Services Tax (GST) on taxable items.