The Complete Guide to Québec Sales Tax (QST)

Québec runs the most independent sales tax in Canada: its own 9.975% rate, its own administrator, its own registration regimes, even its own language considerations. This is the full QST picture in one place — the hub our other Québec guides hang from.

QST in the Canadian system

QST applies at 9.975% alongside the 5% federal GST — a combined 14.975% on Québec sales — but under Québec's own legislation, administered by Revenu Québec. Your CRA registration covers none of it; Québec is a separate relationship with separate returns.

Who must register

The trigger is generally CAD $30,000 in taxable sales to Québec customers. Residents register through the standard system; non-residents — including businesses elsewhere in Canada — can be caught by the specified registration rules Québec pioneered for digital and remote sellers.

Specified vs general regime

Québec mirrors the federal regime split: a specified (simplified) system for remote sellers with no input tax refunds, and the general system with full ITR recovery. The decision logic matches the federal one — Canadian costs push you toward general — and ideally both choices are made together.

Operating in Québec

Day to day: charge GST + QST on Québec sales, file QST returns on Revenu Québec's schedule alongside your federal ones, claim input tax refunds (the QST sibling of ITCs) under the general regime, and mind the French-language requirements that can touch invoicing and customer documents.

The full Québec stack, handled

BluTax registers you with Revenu Québec ($150), chooses the right regime in concert with your federal one, and files both systems in sync — one team, two tax authorities.

Frequently asked questions

Is QST separate from GST?

Completely — separate legislation, separate administrator (Revenu Québec), separate registration and returns, charged together at a combined 14.975%.

What is the QST registration threshold?

Generally CAD $30,000 in taxable sales to Québec customers — with specified registration rules that reach non-resident and out-of-province sellers.

Talk to BluTax

Tell us about your business and we’ll handle the rest. Book a discovery call and we’ll confirm exactly what applies to you — no jargon, no surprises.

This page provides general information about Canadian sales tax and is not tax advice. Rates and thresholds are current as of drafting; BluTax confirms the specifics for each client’s situation.