About CalculatriceTaxes.ca
A simple tool for a question that comes up every day: how much tax is that, and what's left before tax?
Why This Site Exists
Calculating GST and QST isn't complicated, but doing it quickly and without a mistake is harder. Rates aren't the same from one province to the next, Quebec applies two separate taxes at the unusual rate of 9.975%, and working back to a price before tax from a total requires a division most people can't do in their head. Most answers found online mean scanning a rate table, then pulling out a calculator.
CalculatriceTaxes.ca does both at once: enter the amount, pick the province, and the breakdown appears line by line like on a receipt: GST, QST, HST or PST as applicable, in either direction. No account to create, no unnecessary step, and a display that fits on a phone at a store counter.
An Independent Project
This site is an independent project. It is not affiliated with the Canada Revenue Agency, Revenu Québec, or any provincial or territorial government, and it doesn't claim to replace their official publications. Results are provided for informational purposes: they help with budgeting, checking an invoice, or understanding a receipt, but a tax decision should rely on official sources or a professional.
The site may eventually be funded by advertising shown on its pages. That won't influence the published rates or the guide's content: the numbers come from government sources, not advertisers.
How Rates Are Verified
Every published rate (on the calculator, in the comparison table and in the guide's examples) is checked against official sources before going live: the Canada Revenue Agency for GST and HST, Revenu Québec for QST, and provincial finance ministries for PST and RST.
Rates are reviewed again whenever a provincial or federal budget announces a change. These changes happen: Nova Scotia cut its HST from 15% to 14% on April 1, 2025, mid fiscal year. A single source of truth feeds the whole site: the calculator, the table and the guide's examples all use the same data, which keeps one page from staying current while another shows an outdated rate.
The rates shown are those in effect in 2026. They correspond to each province's general rate: some products are zero-rated or exempt, and the guide details these cases.
Found a Mistake?
If a rate looks wrong to you, if a calculation doesn't match your receipt, or if an explanation deserves to be more precise, let us know: corrections are made quickly, and an incorrect rate is fixed first. Write to us via the contact page, naming the page in question and, if possible, the official source for the correct figure.