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✦ Tools & Resources

Reverse GST & QST Calculator for Quebec

Enter any tax-included total and we'll work backwards to the pre-tax amount and the 5% GST and 9.975% QST you paid in Quebec, using 2026 rates.

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Pre-tax amount{{ fPreTax }}
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Total paid{{ fTotal }}
Sales tax is {{ taxPct }} of what you paid in {{ provName }}.
Starting from a pre-tax price instead? Use the GST/HST Calculator to add tax.
Sales tax on {{ fTotal }} across Canada
Tax portion of the same receipt total, by province.
Rates current for 2026 (Nova Scotia HST 14%). Estimates for general information only and not a substitute for professional tax advice.
Talk to a CPA

Splitting GST and QST in Quebec

Divide a Quebec total by 1.14975 to get the pre-tax price. On $114.98, that gives $100 before tax, $5 of GST and $9.98 of QST, rounded to the cent. Registered businesses recover the GST through input tax credits and the QST through input tax refunds from Revenu Québec.

To add both taxes to a price, use the Quebec GST and QST Calculator.

If you also file GST/HST for sales outside Quebec, our GST/HST filing service can help.

✦ 2026 Rates

2026 GST, PST and HST Rates by Province

Province / TerritoryGSTPST / QST / RSTHSTTotal
Alberta5%——5%
British Columbia5%7% PST—12%
Manitoba5%7% RST—12%
New Brunswick——15%15%
Newfoundland and Labrador——15%15%
Northwest Territories5%——5%
Nova Scotia——14%14%
Nunavut5%——5%
Ontario——13%13%
Prince Edward Island——15%15%
Quebec5%9.975% QST—14.975%
Saskatchewan5%6% PST—11%
Yukon5%——5%
HST provinces charge one combined tax that already includes the federal 5%. Nova Scotia's HST dropped to 14% on April 1, 2025.
✦ Good To Know

GST/HST Frequently Asked Questions

HST is short for Harmonized Sales Tax, a single sales tax system that harmonizes provincial sales taxes with the GST. It started on April 1, 1997 with Nova Scotia, New Brunswick, and Newfoundland and Labrador. On July 1, 2010, British Columbia and Ontario joined the mix. But in 2013 British Columbia got cold feet and went back to GST/PST, while PEI joined the HST system.

You must register for a GST/HST number as soon as your business crosses $30,000 in revenue over four consecutive calendar quarters. This is really important: once you cross this threshold you must start collecting GST/HST on behalf of the government, and you will be liable for that amount if it isn't collected. Below the threshold, the CRA considers you a "small supplier."

If you need help applying for an HST number, figuring out whether you still qualify as a small supplier, or actually filing, call me at (905) 814-0111. As an experienced CPA with 25+ years, I'd be happy to assist.

The way this works, you're practically the owner of the goods until they reach the hands of the customer. So if you live in a non-participating province and are selling to a participating province (e.g., Ontario or Nova Scotia), you will have to collect HST. However, if the customer comes and picks up the product in your province, you only charge 5% GST plus the appropriate provincial tax.

This is why it's really important to know the tax laws around HST/GST/PST, as you don't want to be struck with a surprise 13% charge on all revenues after $30,000. Remember rule #1 of wealth creation: don't lose money. Step #2: don't forget #1. Being liable for 13% is no joke. For every $1,000 of revenue you'll have to fork up $130.00 from your profit if you didn't charge when you should have.

Things get more complicated if you're selling zero-rated goods and services (where you're exempt from collecting HST on behalf of the government) or exporting to a foreign country. Knowing when (and when not) to charge HST/GST/PST can make you more competitive by letting you price your product or service accordingly.

Any time you know the tax-included total but need the pre-tax amount. The most common cases: claiming input tax credits (ITCs) on your GST/HST return when a receipt only shows the total, splitting expenses into pre-tax amount and tax for your bookkeeping, reimbursing employee expenses, and checking how much tax is hiding inside an "all-in" quote or invoice.

It's especially useful for small business owners, freelancers and bookkeepers at tax time — the CRA expects the pre-tax amount and the GST/HST recorded separately, but receipts often only show what you paid.

What is QST and why is Quebec different?

QST stands for Quebec Sales Tax (in French, taxe de vente du Québec, or TVQ). It is Quebec's provincial sales tax, charged at 9.975% alongside the 5% federal GST for a combined 14.975% on most purchases. Quebec never joined the HST system — and uniquely among the provinces, both the GST and the QST in Quebec are administered by Revenu Québec rather than the CRA.

Since January 1, 2013 the QST is calculated on the price before GST, not on top of it — the rate was set at 9.975% precisely so the combined total stayed the same as the old tax-on-tax system. To back the tax out of a Quebec receipt, divide the total by 1.14975 — or just use the calculator above.

Unsure whether you should be charging HST?
Farrukh Ahmed, CPA, has served Mississauga since 1995 and handles bookkeeping, GST/HST filing and tax preparation. Get it right before the CRA asks. Responses within 24 hours.
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