Introduction

A missed QST remittance deadline can derail your cash flow and trigger penalties from Revenu Quebec. If you run a business in Quebec or deal with Quebec customers, understanding the Quebec Sales Tax (QST) is essential. This complete guide to Quebec Sales Tax QST for 2026 walks through everything you need to know: who must register, how to calculate and remit QST, what input tax credits are available, and common pitfalls to avoid.

Table of Contents

  • What Is QST and How Does It Work in 2026?
  • QST Registration and Obligations
  • Calculating, Collecting, and Remitting QST
  • Input Tax Credits (ITCs) for QST
  • Common QST Errors and Compliance Pitfalls
  • How to Simplify QST Management with Software
  • Frequently Asked Questions
  • What to Do Next

What Is QST and How Does It Work in 2026?

The Quebec Sales Tax (QST) is a provincial value-added tax that applies in Quebec. Like the federal Goods and Services Tax (GST), it is a multi-stage tax that ultimately falls on consumers. Businesses collect QST on their sales and remit it to Revenu Quebec. In turn, they can recover the QST they pay on business purchases through input tax credits (ITCs).

In 2026, the QST rate remains at 9.975% (as of early 2026). Always check the Revenu Quebec website for the current rate, as it can change with budget announcements. The QST applies to most goods and services supplied in Quebec, with some exemptions and zero-rated items. It is calculated on the same taxable base as the GST for most transactions, though Quebec administers its own set of rules.

Businesses outside Quebec that sell into Quebec may also have QST obligations. If you have physical presence or meet certain economic thresholds, you may be required to register. The concept of "carrying on business in Quebec" is broader than mere physical location.

QST Registration and Obligations

Who Must Register

You must register for QST if you are a person (individual, partnership, corporation) who:

  • Carries on business in Quebec.
  • Makes taxable supplies in Quebec (including supplies of intangible property and services) in the course of a commercial activity.
  • Is not a small supplier.

A small supplier is generally someone whose worldwide taxable revenues (including those of associates) are $30,000 or less in a calendar quarter and over the preceding four quarters. However, there are special rules for public service bodies, charities, and financial institutions.

If you exceed $30,000 in a single quarter, you become a registrant effective the first day of the month in which you exceeded the threshold.

How to Register

You can register for QST through Revenu Quebec's online service, usually by completing form LM-1, Application for Registration (QST/HST/GST). You will receive a QST registration number, which must appear on invoices. Note that QST registration is separate from GST/HST registration, even though many businesses register for both simultaneously.

Filing Frequency

Your filing frequency depends on your annual taxable supplies. Options include:

  • Annual
  • Quarterly
  • Monthly

Revenu Quebec determines your frequency based on your reported revenues. Most businesses with revenues under $1.5 million file quarterly. You must remit the QST collected along with your QST return (form FP-2000-V). Due dates are similar to GST but always confirm with Revenu Quebec.

Calculating, Collecting, and Remitting QST

Calculating QST on Invoices

QST is calculated on the taxable consideration of the supply. For most sales in Quebec, the QST is 9.975% of the selling price (before GST). However, some items are zero-rated (e.g., basic groceries, prescription drugs) or exempt (e.g., certain educational services, health services).

When issuing an invoice to a Quebec customer, include:

  • The total amount before taxes
  • The GST (5% or applicable rate)
  • The QST (9.975%)
  • The total including taxes

Example: A sale of $1,000 with both GST and QST:

  • GST: $1,000 x 5% = $50
  • QST: $1,000 x 9.975% = $99.75
  • Total: $1,149.75

Remitting QST

You must file your QST return and remit the amount due by the deadline. Late remittances incur penalties and interest. You can remit electronically via Revenu Quebec's online portal or through your bank's bill payment system using your QST account number.

Special Situations: Imports and Drop-Shipping

If you import goods into Quebec, you may have to pay QST at the border. Certain drop-shipping arrangements can create QST obligations for out-of-province vendors. Consult a tax professional if your business model involves cross-province transactions.

Input Tax Credits (ITCs) for QST

Just like with GST, businesses can claim input tax credits to recover QST paid on expenses used in their commercial activities. This includes QST on purchases, operating costs, capital assets, and overhead. To claim an ITC, you must have proper documentation (receipts, invoices) and use the property or service primarily in your commercial activities.

Restrictions

  • ITCs are not available for expenses related to exempt supplies (e.g., financial services, residential rents).
  • You cannot claim ITCs for personal expenses or capital property that is not used in your business.
  • There are special rules for meals and entertainment (50% recovery) and motor vehicles (capital cost limits).

How to Claim

Claim ITCs on your QST return (line 105 for most businesses) for the reporting period in which you paid or became liable to pay the QST. If you use the streamlined net tax calculation, you may use a simplified method.

Common QST Errors and Compliance Pitfalls

  • Rate Errors: Using an incorrect QST rate (e.g., applying 9.5% instead of 9.975%) can lead to under-remittance. Always verify current rates.
  • Registration Threshold Miscalculation: Failing to register when you exceed $30,000 can result in penalties for uncollected QST plus interest.
  • Incorrect Input Tax Credit Claims: Claiming ITCs for personal or exempt activities. Revenu Quebec audits often focus on ITC eligibility.
  • Late Filing and Remittance: late returns incur a penalty of 1% to 8% depending on how late, plus daily interest.
  • Missing Invoices: Not providing a QST registration number on invoices can result in fines.
  • Not Reporting Foreign Supplier Obligations: If you buy services from non-residents, you may have to self-assess QST.

To avoid these issues, maintain organized records, use a reliable accounting system, and consider professional guidance.

How to Simplify QST Management with Software

Manually tracking QST on every transaction is tedious and error-prone. Many Canadian businesses and accounting firms use software that automates QST calculation, tracks ITCs, and generates the necessary reports. Awditify, for example, offers built-in sales tax features tailored to Canadian requirements. With automatic bank feeds and AI transaction categorization, you can match each transaction to the correct QST rate and claim ITCs efficiently.

Awditify's 70+ financial reports include QST-specific summaries that make filing straightforward. The client portal and receipt OCR further reduce manual data entry. If you need a practical tool to handle Quebec sales tax compliance, see how Awditify's small business accounting software works.

For a step-by-step setup, the Awditify Help Center explains how to configure sales tax rates and link them to your accounts.

Frequently Asked Questions

What is the QST rate in Quebec for 2026?

The QST rate remained at 9.975% in early 2026. However, provincial budgets can change rates. Always confirm the current rate on the Revenu Quebec website before filing.

Who needs to register for QST?

Anyone carrying on a commercial activity in Quebec who is not a small supplier must register. A small supplier has worldwide taxable revenues of $30,000 or less in a single quarter and over the preceding four quarters. If you exceed $30,000, you must register effective the month you exceed the threshold.

How do I remit QST to Revenu Quebec?

You file your QST return (form FP-2000-V) electronically through Revenu Quebec's online portal. You can remit the amount due via online banking or direct debit. Deadlines depend on your filing frequency (monthly, quarterly, or annually). Late remittances incur penalties and interest.

Can I claim QST back on business expenses?

Yes, if you are a QST registrant, you can claim input tax credits (ITCs) for QST paid on expenses used in your commercial activities. This includes most purchases, operating costs, and capital assets. You need proper invoices and receipts. Personal or exempt-use expenses are not eligible.

What is the best software for managing QST in Canada?

A dedicated Canadian platform like Awditify simplifies QST management by automating calculations, tracking ITCs, and generating filing-ready reports. Its AI categorization, automatic bank feeds, and receipt OCR help avoid errors and save time. You can also integrate QST tracking with invoicing and payroll, making it a complete solution for Quebec businesses.

What to Do Next

QST compliance is a recurring obligation that affects your cash flow and legal standing. Whether you are a new entrepreneur, an established business, or an accounting firm managing multiple Quebec clients, staying on top of QST registration, filing, and input tax credits is essential. The best way to minimize errors and save time is to use software that handles the complexity automatically. Awditify's cloud platform provides the tools you need to manage QST efficiently, from transaction categorization to reporting. Book a demo to see how Awditify can streamline your Quebec sales tax processes.