Overview

Home office expense claims are not automatic. CRA has specific rules for who qualifies, which costs are allowed, and how to calculate the work or business portion. This guide explains the criteria and calculations for: (1) employees, (2) commissioned salespeople (commission employees), and (3) self-employed individuals.

Note: the temporary flat rate method does not apply to the 2023 and later tax years; employees generally use the detailed method.

1) Employees (salary): when a home office is deductible

CRA eligibility criteria

To claim work-space-in-the-home expenses as an employee, CRA generally expects:

• You were required to work from home under your employment arrangement.
• You paid the expenses yourself and were not reimbursed.
• Your workspace meets one of the following tests:
• You worked more than 50% of the time from the workspace for a period of at least 4 consecutive weeks in the year; or
• The workspace is used only to earn employment income and is used regularly and continuously to meet clients, customers, or other people in the course of your duties.

Forms and reporting

Common forms and lines:

• T2200 (Declaration of Conditions of Employment) – signed by your employer.
• T777 – Employment Expenses (calculation schedule).
• The deduction is generally claimed on line 22900 of the T1 return (Other employment expenses).

Eligible expenses (typical)

• Rent (if you rent your home).
• Utilities: electricity, heat, water (as applicable).
• Reasonable monthly home internet access fees (plan portion).
• Maintenance and minor repairs related to the workspace.
• Office supplies and certain phone expenses may be deductible depending on CRA rules and your situation.

Not eligible (common exclusions)

• Mortgage interest and principal mortgage payments.
• Property tax.
• Home insurance.
• Strata fees.
• Capital improvements (new windows, flooring, major renovations).
• Internet connection / installation fees (as opposed to monthly access fees).
• Expenses that were reimbursed by the employer.

Employees who are also shareholders (owner-managers)

If you work for your own corporation (or you own shares in your employer), the employee home-office rules can still apply, but CRA will typically expect cleaner documentation that shows the expenses were required to earn employment income (not incurred because you control the company).

Practical points to keep your claim defensible:

• Have a clear employment arrangement: the home office is required for your duties, you pay the costs yourself, and you are not reimbursed (keep a signed T2200).
• Be aware of “specified employee” rules in CRA guidance. CRA uses this concept for certain employment-expense rules; it includes employees who deal non-arm’s length with the employer or who own (directly or indirectly) at least 10% of the issued shares of a class of the employer (or a related corporation).
• Separate roles: claim only costs that relate to employment duties. Amounts incurred mainly to benefit you as a shareholder/investor are not employment expenses.
• If you pay yourself dividends only (no T4 employment income), an employee home office claim generally won’t work. Consider whether paying salary is appropriate, or whether you have self-employed business income that can support a T2125 business-use-of-home claim.
• Keep the backup: floor plan/measurements, area/time allocation, and invoices/utility statements. CRA cares most about reasonableness and consistency.

2) Commissioned salespeople (commission employees): what is different

Commission employees are employees who earn commission income (often reported in box 42 of the T4) and generally sell goods or negotiate contracts.

Eligibility and forms

• The workspace tests are generally the same as for salaried employees.
• You typically still need a signed T2200 and complete T777.

Additional expense categories commonly available to commission employees

• Home insurance (work portion).
• Property taxes (work portion).
• A reasonable portion of eligible cell phone airtime and similar costs when applicable to earning commission income.

Still not allowed (typical)

• Mortgage principal payments.
• Capital upgrades.
• Expenses that are personal in nature or not connected to earning employment income.

3) Self-employed (business): business-use-of-home expenses (T2125)

CRA eligibility criteria

CRA generally allows business-use-of-home expenses if:

• The workspace is your principal place of business; or
• You use the space only to earn business income and you use it on a regular and ongoing basis to meet clients, customers, or patients.

Typical eligible expenses

• Utilities and maintenance related to the business workspace.
• Home insurance (business portion).
• Property taxes (business portion).
• Mortgage interest (business portion).
• CCA may be available on the business portion of the home (important tax consequences on sale).

Loss limitation (important)

Business-use-of-home expenses cannot create or increase a business loss. If your home expenses exceed your net business income before these expenses, the unused portion is generally carried forward to a later year, as long as you continue to meet the eligibility conditions.

How to calculate your claim (CRA-style approach)

Step 1 – Area basis (space percentage)

A common CRA-accepted approach is to calculate the workspace percentage as: workspace area divided by total finished home area. Total finished area generally includes hallways, bathrooms, and kitchens.

Step 2 – Time basis (only if space is shared)

If the workspace is used for both work and personal use, CRA expects a reasonable time adjustment.

Example time factor: (hours used for work per week) / 168 hours per week.

Step 3 – Apply the percentage to eligible expenses only

Apply your combined allocation percentage to the eligible expenses for the period you qualify (employees) or the fiscal/tax year (self-employed). Keep a simple worksheet showing your measurements and calculations in case CRA asks.

Worked example (shared space)

Assume: total finished home area = 1,000 sq ft; shared workspace area = 100 sq ft; you work 40 hours/week from that space.

• Area percentage = 100 / 1,000 = 10%.
• Time percentage = 40 / 168 = 23.8%.
• Combined percentage = 10% x 23.8% = 2.38%.
• You would claim about 2.38% of eligible costs (for the eligible period for employees).

Quick summary table

Category	Key CRA eligibility test	Typical allowed expenses	Common exclusions
Employee (salary)	Required to work from home + meets workspace test (>50% for 4 consecutive weeks, or dedicated client-meeting workspace).	Rent, utilities, monthly internet access fees (plan portion), maintenance/minor repairs (workspace portion).	Mortgage interest, principal payments, property tax, home insurance, strata fees, major renovations, reimbursed costs.
Commission employee	Same workspace tests + commission employment conditions (often box 42 on T4).	Same as salary + (commonly) home insurance and property taxes (work portion).	Mortgage principal, capital upgrades, personal expenses.
Self-employed (T2125)	Principal place of business OR exclusive business use + regular/ongoing client meetings.	Utilities, maintenance, insurance, property taxes, mortgage interest; CCA possible (caution).	Cannot create/increase business loss; personal portion not deductible.

Records CRA expects you to keep

• Workspace measurements (floor plan/home area and workspace area).
• A worksheet showing your allocation (area, and time if applicable).
• Receipts/bills for eligible expenses paid.
• For employees: your work arrangement and signed T2200.

Common mistakes

• Claiming without being required to work from home (employee claims).
• Claiming mortgage interest as an employee.
• Claiming connection/installation fees instead of monthly internet access fees.
• Using an unreasonable workspace percentage (for example, claiming the whole home).
• Trying to create a business loss using home expenses (self-employed).

FAQ

Can two spouses claim the same rent or utilities?

The same expense cannot be claimed twice. If both qualify, allocate shared costs reasonably between you.

If I worked from home all year, can I claim all 12 months?

Not automatically. For employees, CRA ties the detailed method claim to the period(s) you were required to work from home and meet the workspace tests.

Should a self-employed person claim CCA on their home?

CCA can be allowed on the business portion, but it may create taxable recapture and capital gain implications when the home is sold. Get advice before claiming CCA on a principal residence.

Need help?

If you want to claim home office expenses without guessing, we can confirm your eligibility (employee vs commission vs self-employed), optimize the calculation, and help you document the claim so it holds up in a CRA review.

References (CRA)

• CRA – Home office expenses for employees (work-space-in-the-home expenses) and detailed method pages.
• CRA Guide T4044 – Employment Expenses (includes forms T777 and T2200).
• CRA – Business-use-of-home expenses (Form T2125 guidance).