Home office deductions in Quebec: The complete guide

At a Glance. In Quebec, a self-employed person who works from home can deduct a portion of their housing expenses: rent or mortgage interest, electricity, heating, home insurance, and maintenance. The core of the calculation is a pro-rata basis of floor space: the office area divided by the total area of the home. A 12 m² office in an 80 m² home yields 15%: out of $19,700 in annual expenses, approximately $2,955 becomes deductible. The expense is reported on Form T2125 (CRA) and Form TP-80 (Revenu Québec); employees working remotely must use the itemized method, with Forms T2200 and TP-64.3. All amounts are in Canadian dollars.

Remote work is here to stay in Quebec, and with it comes a question that arises every spring: What portion of my living expenses can I deduct? The answer lies in a simple formula, the same one that powers any deductible expense calculator, a pro-rata calculation based on square footage, applied to a list of eligible expenses that varies depending on your status. This guide explains the eligibility rules, provides a step-by-step formula, includes a table of expenses by situation (homeowner, renter, employee), offers a complete numerical example, and highlights two pitfalls to watch out for: the loss limit and depreciation. All of this covers both tax jurisdictions, since Quebec requires two tax returns: the T1 to the Canada Revenue Agency (CRA) and the TP1 to Revenu Québec.

Who is eligible for the home office deduction?

For self-employed individuals, the CRA and Revenu Québec apply the same test, with two entry points:

• Your home is your primary place of business. More than half of your work takes place there: this is typical for consultants, graphic designers, translators, or developers who work from home.
• Or where the space is used exclusively for business purposes AND to meet with clients on a regular and ongoing basis. A dedicated office where you meet with clients every week qualifies, even if you work primarily elsewhere.

Only one of the two options is necessary. If you’re incorporated, the process changes: the company covers the expenses, for example, by reimbursing you for reasonable home office expenses, and the arrangement must be approved by your accountant. Employees who work remotely have their own, stricter rules: we’ll cover those below.

The core of the calculator: The 4-Step formula

All calculators for deductible expenses use the same method. Here’s how an accountant applies it to your case:

1. Measure your workspace. The area of the room or space used for business purposes, in square meters or square feet: the unit doesn’t matter, as long as it’s consistent throughout.
2. Divide by the total square footage of the home. A 12 m² home office in an 80 m² residence = 15%: that’s your base usage rate.
3. Adjust the amount if the space has a dual purpose. A kitchen table used for work 8 hours a day and by the family the rest of the time: multiply by 8/24. The 25% of a large common room then becomes 25% × 33.3% = 8.3%.
4. Apply the rate to each eligible expense. Then check the cap: the deduction cannot exceed the business’s net income (details below).

An expense that applies solely to the workspace is not subject to pro-rata calculation: repainting the office itself, for example, is fully deductible. Conversely, a purely personal expense remains non-deductible, regardless of the formula used.

Eligible expenses: A table by situation

The list of expenses to which your rate applies depends on your status. Here is the reference table for 2026:

Two important points to note. Employees whose compensation depends in part on sales are entitled to claim a few additional expenses (home insurance, property taxes): check with an accountant to see if this applies to you. As for taxes: if you’re registered for GST (5%) and QST (9.975%), registration is mandatory for taxable sales exceeding $30,000, a portion of the taxes paid on the business portion of certain expenses (electricity, maintenance, Internet) can be recovered through input tax credits and refunds. Residential rent, however, is exempt from taxes: there’s nothing to recover on that. The rules are strict, make sure to have them verified.

Example with numbers: The typical case of a freelancer who rents

Let’s look at a profile that consistently appears among the 15,000+ requests received by Bankeo since 2023: a self-employed tenant with a 12 m² enclosed office in an 80 m² four-and-a-half-room apartment, resulting in a rate of 15%.

At a combined marginal tax rate of approximately 36% (federal plus Quebec, typical for taxable income between $56,000 and $106,000), this $2,955 deduction translates to about $1,070 less in taxes each year for expenses you’re already paying. The same calculation for a homeowner: a 15 m² office in a 150 m² house (10%), with $9,000 in mortgage interest, $4,200 in property and school taxes, $1,200 in insurance, $2,400 in electricity and heating, and $800 in maintenance, results in $17,600 × 10% = $1,760 in deductions. This amount should be entered on the appropriate line of Form T2125 for the CRA and Form TP-80 for Revenu Québec in both of your tax returns.

Keep proof of each figure: lease, Hydro-Québec bills, tax statements, mortgage statements, and a simple floor plan of the home showing the square footage. These documents must be kept for six years; our guidelines on Retaining Supporting Documents in Quebec explain what to keep and for how long.

The key limit to know: No loss, but a carryover with no expiration date

The home office deduction has a fixed cap: it cannot create or increase a business loss. In practice, it is applied last, after all other expenses. If your net income before the home office deduction is $1,800 and your calculated expenses are $2,955, you deduct $1,800 this year, and the remaining $1,155 is carried over to the following year with no expiration date, as long as you continue to meet the eligibility requirements. A bad year therefore does not cause you to lose the deduction, it simply defers it.

Remote workers: The detailed method, and nothing else

The temporary flat rate of $2 per day, introduced during the pandemic, no longer applies as of the 2023 tax year. For your 2025 taxes filed in 2026, an employee working remotely must use the itemized method and provide supporting documentation:

• Requirements: You must have worked from home more than 50% of the time during a period of at least four consecutive weeks, as part of a telework agreement with your employer (even if it was verbal).
• Employer Forms: The federal T2200 and the Quebec TP-64.3, signed by the employer. Without them, there is no deduction.
• Claim: Form T777 with Form T1 (line 22900) and Form TP-59 with Form TP1: once again, both brackets.
• Eligible Expenses: a portion of rent, electricity, heating, a reasonable portion of Internet service, minor maintenance, and supplies. An employee may not deduct mortgage interest, property taxes, or home insurance.

The prorated amount is calculated exactly the same way as for a self-employed person: the area of the space divided by the total area of the home, multiplied by the number of hours used for work if the space is shared.

How much is it worth, and how much does a helping hand cost?

A home office is just one of the deductions available to self-employed individuals: vehicle, cell phone, training, professional fees, and contributions all follow the same logic of supporting documentation and prorated calculations. This is exactly the kind of tax optimization where an accountant adds value. Our guide on How Much Does an Accountant Cost for a Self-Employed Person in Quebec? calculates the cost-benefit ratio, and our 2026 Tax Season Checklist provides a timeline to help you get everything done on time.

In terms of budget, comprehensive accounting support for a business costs approximately $3,000 per year on average, with most engagements ranging from $500 to $6,000 depending on the business profile and services provided. Based on actual fees from 1,248 engagements completed through Bankeo (2024-2026), out of more than 15,000 requests received; the Bankeo Fee Barometer provides a breakdown of these ranges by service. A single self-employed tax return obviously costs less than a full annual service package.

Frequently asked questions

Who can deduct home office expenses in Quebec?

A self-employed individual whose home is their principal place of business, or whose space is used exclusively for business purposes and to meet with clients on a regular and ongoing basis. An employee may also claim a deduction if they have worked remotely more than 50% of the time for at least four consecutive weeks and their employer signs forms T2200 and TP-64.3. If you’re incorporated, the corporation covers the expenses: confirm the arrangement with your accountant.

How do I calculate the percentage of my home used for work?

Divide the area of the workspace by the total area of the home: a 12 m² office in an 80 m² home equals 15%. If the space is also used for personal purposes, multiply by the fraction of hours used for business: a shared room used 8 hours a day results in 8/24, or one-third of the prorated area. This rate is then applied to each eligible expense.

What expenses can a self-employed person deduct for their home office?

A tenant can deduct their share of rent, electricity, heating, home insurance, minor repairs, and Internet access. A homeowner can deduct their share of mortgage interest (never the principal), property and school taxes, insurance, electricity, heating, and maintenance. Depreciation of the residence is allowed but rarely recommended, because it reduces the principal residence exemption upon resale. All of this must be reported on Form T2125 to the CRA and on Form TP-80 to Revenu Québec.

Can a teleworking employee still claim these deductions in 2026?

Yes, but only using the itemized method: the temporary flat rate of $2 per day no longer applies as of the 2023 tax year. You must have worked remotely for more than 50% of the time for at least four consecutive weeks, obtain the T2200 (federal) and TP-64.3 (Quebec) forms signed by your employer, and then file your claim using the T777 and TP-59 forms. An employee may deduct their share of rent, electricity, heating, and Internet costs, but not mortgage interest or property taxes.

Can the home office deduction result in a loss?

No. The deduction is limited to the business’s net income: it can reduce it to zero, but never below that amount. However, the excess is not lost: it carries over to subsequent years, with no expiration date, as long as the eligibility requirements continue to be met. Keep your supporting documents for six years: leases, electricity bills, tax statements, and mortgage statements.

How much does it cost to hire an accountant to maximize these deductions?

Comprehensive accounting services for a business cost a median of approximately $3,000 per year, with most engagements ranging from $500 to $6,000. This is based on the actual fees for 1,248 engagements completed through Bankeo (2024-2026), out of more than 15,000 requests received. A self-employed tax return alone costs less; the Bankeo Fee Barometer provides a breakdown of the ranges by service.

Sources

1. Revenu Québec, Self-Employed Individuals
2. Revenu Québec, Business Portal
3. Canada Revenue Agency, official portal
4. Ordre des CPA du Québec