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Quebec Sales Tax (GST & QST) Calculator 2026

Sales tax calculator, GST and QST 2026

Calculate GST and QST for Quebec invoices, quotes, retail pricing, and service totals with a fast 2026 tax calculator built for Canadian businesses.

This Quebec sales tax calculator helps you estimate GST and QST on taxable sales, reverse-calculate tax from tax-included totals, and explain the main Quebec sales tax rules customers and businesses ask about in 2026.

Tax Calculator

Quebec Sales Tax Calculator

Enter a before-tax or tax-included amount to calculate GST and QST instantly.

CAD

GST

5%

QST

9.975%

Combined

14.975%

Breakdown

Subtotal
$100.00
GST (5%)
$5.00
QST (9.975%)
$9.98
Total tax
$14.98
Final total
$114.98

How Quebec sales tax works

  • GST is the federal goods and services tax charged at 5% on most taxable supplies in Quebec.
  • QST is the Quebec sales tax charged at 9.975% on most taxable supplies in Quebec.
  • Many Quebec businesses must show GST and QST separately on invoices so customers can see the breakdown clearly.
  • If your advertised price already includes tax, you can reverse the calculation to estimate the before-tax subtotal and each tax amount.

Quebec Rebates and Exemptions to the GST

  • Basic groceries, many prescription drugs, and most medical devices that qualify as zero-rated supplies may not require GST or may carry a 0% rate depending on the supply type.
  • Residential rent, many financial services, and many health-care or educational services can be exempt, which means no GST or QST is charged on the exempt supply.
  • Some public service bodies, charities, and qualifying organizations may be eligible for partial GST or QST rebates depending on their registration status and the activity involved.
  • Input tax recovery rules are separate from customer-facing tax calculation. Businesses should confirm whether their purchases allow input tax credits or refunds before relying on invoice totals alone.

Filing and invoicing notes for Quebec

Quebec businesses that exceed the small-supplier threshold may need to register for GST and QST and collect both taxes on taxable supplies.
Invoice records should keep the taxable subtotal, GST amount, QST amount, and customer details in a format that supports bookkeeping and remittance.
If you sell across provinces, tax treatment can depend on the place of supply and whether the customer is in Quebec or another province.
Rates and exemptions can change. Always confirm the final treatment with Revenu Quebec and CRA guidance for regulated or unusual transactions.

Frequently asked questions

What is the Quebec sales tax rate in 2026?

For most taxable supplies in Quebec in 2026, GST is 5% and QST is 9.975%, for a combined effective sales tax rate of 14.975%.

How do I calculate GST and QST in Quebec?

Multiply the taxable amount by 5% to get GST and by 9.975% to get QST, then add both tax amounts to the subtotal to get the final total.

Do I charge GST and QST on every invoice in Quebec?

No. Some supplies are zero-rated or exempt. Businesses should confirm whether the sale is taxable, zero-rated, or exempt before charging tax.

Can I calculate Quebec tax from a tax-included price?

Yes. A reverse tax calculation can estimate the before-tax subtotal and split the total tax into GST and QST when the final price already includes tax.

Why is a Quebec tax calculator useful for invoicing?

It helps businesses prepare quotes and invoices faster, reduce tax-entry mistakes, and explain tax totals clearly to customers before payment.

More Canadian tax calculator pages

We are expanding this tools library province by province. Quebec is live first, with more Canadian tax calculator pages planned next.

View all tools

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