Quebec Tax Calculator (2026) — Add or Reverse Tax
Quebec's combined sales tax is 14.97% (GST + QST). Calculate income tax, or add/reverse Quebec sales tax on any price, below.
Enter your income to see your Quebec take-home pay.
Understanding Quebec Taxes
Quebec charges 5.00% GST plus 9.97% QST, for a combined 14.97% on most goods and services.
Quebec is the only province where the provincial tax authority — Revenu Québec, not the CRA — administers and collects the federal GST alongside its own QST, under a unique federal-provincial agreement.
On the income tax side, Quebec's provincial brackets start at 14% and rise to 25.75% for the top bracket, layered on top of the federal brackets (14% to 33% for 2026).
Administered by
Revenu Québec (which collects both GST and QST on behalf of the CRA under a special agreement)
Sales tax type
GST + QST
Why Reverse Sales Tax Calculation Matters
Receipts and invoices usually show only the tax-included total — not the pre-tax price. Reversing the calculation matters for bookkeeping (separating revenue from tax collected for GST/HST or PST remittance), expense reports, and price comparisons across provinces. Because dividing by (1 + rate) isn't the same as simply subtracting the rate, doing this by hand is a common source of errors — the calculator above handles it exactly.
History & How the Rate Is Built
Quebec's provincial sales tax (QST) was consolidated in 1994 at 6.5%, initially calculated on the selling price plus the federal GST — a compounding 'tax-on-tax' structure. A 2013 federal-provincial harmonization agreement changed the calculation method to eliminate that compounding, and the rate has since risen to today's 9.975%.
Quebec's unique arrangement — where Revenu Québec, not the CRA, administers both GST and QST under a special federal-provincial agreement — gives the province more direct operational control over federal tax collection within its borders than any other province enjoys.
Business Use Case: Registering in Quebec
A business registering for tax purposes in Quebec files with Revenu Québec rather than the CRA for its combined GST/QST obligations — the only province where the federal tax authority delegates GST administration entirely to a provincial one.
Real-World Example
A $100.00 purchase in Quebec at the combined rate of 14.97%:
- Tax amount: $100.00 × 14.97% = $14.98
- Total price: $100.00 + $14.98 = $114.98
Quebec Tax Registration for Businesses
Businesses generally register for QST (and GST, collected on the same return) once worldwide taxable revenue exceeds the standard $30,000 small-supplier threshold.
Frequently Asked Questions — Quebec Taxes
What is the sales tax rate in Quebec?▾
Who administers sales tax in Quebec?▾
When do businesses need to register for tax in Quebec?▾
What are Quebec's income tax brackets for 2026?▾
How do I calculate sales tax on a purchase in Quebec?▾
How do I reverse Quebec sales tax to find the price before tax?▾
Why does Quebec administer federal GST itself instead of the CRA?▾
References & Sources
Rates last verified for 2026. Tax brackets and provincial sales tax rules can change — always confirm current figures with the CRA or Quebec's provincial revenue agency before filing or invoicing. This tool is for estimation and educational purposes only and is not tax, legal, or accounting advice.
Jordan Hayes
Verified AuthorLead Content Editor & Personal Finance Specialist
Jordan Hayes is a personal finance content strategist with 9+ years building educational finance and health resources. He has written and fact-checked over 200 personal finance guides covering mortgage amortization, retirement planning, tax strategy, and budgeting. His work applies IRS publications, Federal Reserve data, and peer-reviewed research to make complex calculations accessible.