An IT contractor operating through a corporation with an establishment in Quebec files returns with two tax agencies, not one. The federal returns go to the Canada Revenue Agency. The provincial returns go to Revenu Québec. Unlike most other provinces, where the T2 captures both federal and provincial corporate tax in a single filing, Quebec operates a parallel system with its own corporate return, its own personal income tax return, and its own consumption tax. The administrative load is higher than in other provinces, and the planning needs to account for both sets of rules simultaneously.
This guide covers how the four-return structure works, where GST and QST fit, and what QPP means for incorporated contractors paying salary.
Two corporate returns: T2 and CO-17
A corporation with an establishment in Quebec generally files a federal T2 corporation income tax return with CRA for federal corporate tax, and a separate CO-17 corporation income tax return with Revenu Québec for Quebec provincial corporate tax.
Both returns cover the same fiscal year and much of the same underlying financial data, but they apply different rules. The federal T2 uses the Income Tax Act and CRA’s interpretations. The CO-17 uses Quebec’s Taxation Act, which has its own definitions, deductions, and credits that do not always align with the federal rules.
For example, the federal small business deduction and Quebec’s equivalent deduction both reduce corporate tax on active business income up to the business limit, but the applicable rates, the business limit calculation, and certain eligibility conditions are determined separately under each statute. The combined federal and provincial rate on qualifying active business income in Quebec has historically been in a similar range to Ontario, but the components are set independently and change on separate schedules. Confirm the rate applicable to your fiscal year before estimating your tax liability.
Both returns are due six months after the fiscal year-end. Corporate tax owing is due earlier: two months after year-end for most corporations, or three months for eligible CCPCs. See CRA’s corporate payment deadlines for federal obligations and Revenu Québec directly for provincial payment deadlines, as detailed corporate payment guidance is primarily available in French on their site.
Two personal returns: T1 and TP-1
A Quebec resident files a federal T1 personal income tax return with CRA and a separate TP-1 income tax return with Revenu Québec.
The T1 and TP-1 cover the same calendar year income, but each applies its own set of personal credits, deductions, and tax brackets. Federal and provincial tax calculations are performed separately. Quebec’s personal tax rates and brackets differ from the federal rates. Some deductions that reduce federal income have no Quebec equivalent, and some Quebec-specific credits do not appear on the federal return.
Both personal returns are due April 30. The June 15 extended filing deadline applies to both when the taxpayer or their spouse or common-law partner carried on a business during the year, but any balance owing still accrues interest from April 30 under both the federal and provincial systems.
For an incorporated contractor receiving only salary and dividends from the corporation, the April 30 deadline normally applies to both returns. The June 15 extension would apply only if the contractor also has direct self-employment income outside the corporation.
RL slips: Quebec equivalents of federal information slips
Quebec has its own set of information slips that accompany the federal equivalents. An incorporated contractor paying salary issues an RL-1 slip (equivalent to the T4) for employment income. Dividends paid to a Quebec resident shareholder require an RL-3 slip (equivalent to the T5).
The corporation must file both sets of slips: federal slips with CRA and RL slips with Revenu Québec. This can mean both federal slips and Quebec RL slips: T4/RL-1 for salary and T5/RL-3 for dividends.
GST and QST: two consumption taxes, one agency
Quebec is the only province where Revenu Québec, rather than CRA, administers the GST on behalf of the federal government. As a result, an IT contractor with a Quebec establishment registers for both GST and QST through Revenu Québec, files both returns through Revenu Québec, and remits both amounts to Revenu Québec. There is no separate CRA filing for GST in Quebec.
Both taxes apply separately: GST at 5% and QST at 9.975% on the sale price. The combined rate is 14.975%. See Revenu Québec’s basic rules for GST and QST for how the rates apply to different types of supplies.
The registration threshold for both taxes is CAD $30,000 of taxable supplies in a rolling 12-month period, consistent with the federal threshold. Most IT contractors on agency contracts reach this threshold immediately.
For incorporated contractors with U.S. clients, the export of services is generally zero-rated for GST and QST purposes, meaning the tax applies at a rate of zero on qualifying export services, and input tax credits and input tax refunds remain claimable on related expenses. The rules for determining whether a service qualifies as an export are consistent across federal and Quebec legislation, but should be confirmed for the specific contract and client arrangement.
See Revenu Québec’s GST/HST and QST registration information for filing and remittance details.
QPP instead of CPP
Quebec operates the Québec Pension Plan (QPP) rather than the Canada Pension Plan. The mechanics are similar: an incorporated contractor paying salary contributes both the employee and employer portions of QPP on that salary. The contributions are calculated, withheld, and remitted to Revenu Québec rather than CRA.
QPP contributions generate retirement benefit entitlement in the same way CPP does, but under the QPP system administered by Retraite Québec. The contribution rates and maximum pensionable earnings are set separately from CPP and change on their own schedule.
As with CPP for incorporated contractors in other provinces, QPP contributions apply only on salary drawn from the corporation, not on dividends. A contractor drawing exclusively in dividends accumulates no QPP retirement benefit in those years.
What the four-return structure means in practice
The full four-return structure applies when two conditions are met: the corporation has an establishment in Quebec, and the shareholder is a Quebec resident. These are independent. A corporation with a Quebec establishment whose shareholder lives in Ontario files T2 and CO-17 at the corporate level, but the shareholder files only a T1 personally, not a TP-1. A Quebec-resident shareholder of a corporation with no Quebec establishment files T2 federally and a TP-1 personally, but no CO-17. When both conditions apply, Quebec establishment and Quebec-resident shareholder, all four returns are in play: T2 and CO-17 for the corporation, T1 and TP-1 personally. Each pair covers the same underlying transactions but applies different rules and is filed with a different agency.
The compensation planning decisions that connect the corporate and personal returns, described in the T2 and T1 filing guide, apply equally in Quebec, with the added requirement that those decisions are evaluated under both federal and Quebec rules simultaneously. A salary or dividend amount that is optimal from a federal perspective may produce a different result provincially, depending on personal credits, QPP contributions, and the Quebec-specific tax bracket structure.
Revenu Québec has its own audit and compliance programs. A file that satisfies CRA does not automatically satisfy Revenu Québec, and vice versa. Documentation, shareholder loan treatment, and compensation rationale are reviewed under Quebec’s Taxation Act when Revenu Québec initiates a review.
For most incorporated IT contractors in Quebec, working with a CPA who handles both federal and Quebec filings, and who prepares both sets of returns together, reduces the risk of inconsistencies between the two systems and ensures the planning decisions are evaluated correctly under both sets of rules.