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Quebec Tax Calculator

GST/QST Calculator — Quebec Sales Tax 2026

Quebec charges 14.975% total: 5% GST + 9.975% QST, both calculated on subtotal only (not compound). Enter any amount below.

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14.975% Total Tax

Federal GST

9.975%

Quebec QST

14.975%

Total

Quick Answer: Quebec total tax is 14.975%

$100 purchase GST $5.00 + QST $9.98 $114.98 total

QST is calculated on subtotal only, not compound on GST (since 2013)

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Calculate Quebec Sales Tax

Enter any amount to calculate GST + QST instantly

Amount Before Tax ($CAD)

Subtotal $0.00

GST (5%) $0.00

QST (9.975%) $0.00

Total $0.00

$0.00 + 5% GST + 9.975% QST = $0.00

Since 2013, QST is calculated on the subtotal only — NOT compounded on top of GST.

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Understanding Quebec QST

Quebec has its own provincial sales tax (QST / TVQ) administered by Revenu Quebec, separate from the federal GST.

QST Is NOT Compound on GST

Since January 1, 2013, QST is calculated on the subtotal only: QST = Subtotal x 9.975%. Before 2013, QST was applied on the GST-included amount, but this was changed to harmonize with the federal system. This is a common source of errors.

Registration Threshold ($30K)

You must register for QST if your worldwide taxable sales exceed $30,000 in four consecutive calendar quarters or a single quarter. This matches the GST threshold. Register with Revenu Quebec, not the CRA.

QST Registration Number

Your QST number is separate from your GST/HST number. It follows the format: 10 digits + TQ + 4 digits (e.g., 1234567890 TQ 0001). Both numbers must appear on invoices to Quebec customers. See our CRA invoice guide.

Filing Frequency

QST is filed with Revenu Quebec. Filing frequency depends on annual sales: monthly (over $6M), quarterly ($1.5M-$6M), or annually (under $1.5M). You can file online through Revenu Quebec's My Account portal.

ITC vs ITR Differences

For GST, you claim Input Tax Credits (ITCs) with the CRA. For QST, you claim Input Tax Refunds (ITRs) with Revenu Quebec. The rules are similar but filed separately. Use our GST/HST return guide for CRA filing.

Small Supplier Exemption

If your worldwide taxable sales are $30,000 or less, you are a "small supplier" and do not need to register for or charge QST. However, you also cannot claim ITRs on your purchases. You may still voluntarily register.

Quebec Sales Tax Examples

Quick reference for common amounts (5% GST + 9.975% QST = 14.975%)

Amount	GST (5%)	QST (9.975%)	Total
$50.00	$2.50	$4.99	$57.49
$100.00	$5.00	$9.98	$114.98
$250.00	$12.50	$24.94	$287.44
$500.00	$25.00	$49.88	$574.88
$1,000.00	$50.00	$99.75	$1,149.75
$5,000.00	$250.00	$498.75	$5,748.75

Quebec Billing: Navigating QST, Language Law, and Industry-Specific Rules

Quebec's tax system stands apart from every other Canadian province. The province levies a 9.975% QST on top of the 5% federal GST, but since 2013 the QST is calculated on the subtotal only, not compounded on the GST amount. This is a critical distinction that many out-of-province businesses get wrong when invoicing Quebec clients. A $1,000 service invoiced in Quebec should show $50.00 GST and $99.75 QST for a total of $1,149.75, not the $1,154.74 that results from the old compound method.

Pre-2013 vs Post-2013 QST Calculation

Before January 1, 2013, QST was calculated on the subtotal plus GST (the compound method). For a $1,000 invoice, the old method produced: GST = $50.00, then QST = ($1,000 + $50) x 9.975% = $104.74, for a total of $1,154.74. After 2013, the formula changed so both taxes are calculated independently on the subtotal: GST = $50.00, QST = $1,000 x 9.975% = $99.75, total = $1,149.75. The difference is $4.99 on a $1,000 invoice. Using the old compound method today will overcharge your clients and create compliance issues with Revenu Quebec.

Bill 96 and French Language Requirements

Under Bill 96, which strengthened Quebec's Charter of the French Language in 2022, commercial documentation including invoices must be available in French. Businesses can provide bilingual invoices, but French must be at least as prominent as English. This applies to all companies doing business in Quebec, not just those headquartered there. For businesses in neighbouring New Brunswick that serve Quebec clients, this means maintaining French-language invoice templates even if your own province operates primarily in English. Having bilingual templates ready is not optional for Quebec-facing commerce.

Construction, RBQ Licensing, and Revenu Quebec

Quebec's construction industry requires contractors to hold a Regie du batiment du Quebec (RBQ) licence, and invoices for construction services must include the licence number. Revenu Quebec, not the CRA, administers QST collection and filing, which means Quebec businesses manage two separate filing relationships: GST returns to the CRA and QST returns to Revenu Quebec. This dual filing creates opportunities for discrepancies if your invoicing system does not cleanly separate the two tax amounts. Reviewing our guide on CRA invoice compliance alongside Revenu Quebec's requirements ensures both agencies receive consistent numbers.

Quebec QST FAQs

Is QST calculated on top of GST?

No. Since January 1, 2013, QST is calculated on the subtotal only — not compounded on top of GST. Before 2013, QST was applied to the GST-included amount (making the effective rate higher), but this changed to align with the federal system. Both GST and QST are now calculated separately on the pre-tax amount.

What is the QST rate in 2026?

The QST (Quebec Sales Tax / TVQ - Taxe de vente du Quebec) rate is 9.975% in 2026. Combined with the 5% federal GST, the effective total tax rate in Quebec is 14.975%. For example, on a $100 purchase: GST = $5.00, QST = $9.98, Total = $114.98.

When do I need to register for QST?

You must register for QST if your worldwide taxable sales exceed $30,000 over four consecutive calendar quarters or in a single quarter. This is the same threshold as GST registration. However, QST registration is done through Revenu Quebec, not the CRA. You can register voluntarily even if you are below the threshold.

How do I file QST returns?

QST returns are filed with Revenu Quebec (not the CRA). Your filing frequency depends on annual taxable sales: monthly if over $6 million, quarterly if $1.5M-$6M, or annually if under $1.5M. You can file online through Revenu Quebec's My Account portal. The amount you remit equals QST collected minus Input Tax Refunds (ITRs) claimed.

How is QST different from other provincial taxes?

Since 2013, Quebec's QST (taxe de vente du Quebec) is calculated on the subtotal only, the same base as GST. This is similar to how BC and Saskatchewan calculate PST separately on the subtotal. Quebec's combined effective rate is 14.975% (5% GST + 9.975% QST). Before 2013, QST was compounded on (subtotal + GST), but this is no longer the case.

Do I need separate GST and QST numbers?

Yes. If you need to charge tax, you must register separately with CRA (for GST) and Revenu Quebec (for QST). Both registration numbers should appear on your invoices. The $30,000 threshold applies separately to each registration.

What if my Quebec client is tax-exempt?

Some organizations (like certain First Nations, hospitals, and municipalities) may be exempt from GST, QST, or both. iBill allows you to mark invoices as tax-exempt or create invoices with only GST or only QST as needed.

Can I invoice clients in other provinces?

Yes! When you select a client's province in iBill, it automatically applies the correct tax rate. Ontario clients get HST (13%), BC clients get GST+PST (12%), and Quebec clients get GST (5%) + QST (9.975%), both calculated on the subtotal.

Does iBill support French invoices?

iBill is currently in English, with French support planned. All tax calculations, compliance features, and invoice formats work correctly for Quebec businesses regardless of language preference.

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