Home Office Tax Deduction in Canada 2025

Updated March 2025 • bremo.io

The home office deduction allows employed and self-employed Canadians to deduct a portion of their home expenses when they work from home. For employees, CRA eliminated the temporary flat-rate method after the 2022 tax year, so for 2024 and 2025 returns, all employees must use the detailed method with a T2200 from their employer.

Who Can Claim Home Office Expenses?

Employees

To claim home office expenses as an employee, you must meet ALL of the following conditions:

• You were required to work from home under your employment contract or by your employer
• You worked from home more than 50% of the time for a period of at least 4 consecutive weeks
• Your employer completed and signed Form T2200 (Declaration of Conditions of Employment)
• The expenses were not reimbursed by your employer

Self-Employed Individuals

If you are self-employed, you do not need a T2200. You can deduct home office expenses as long as you use a dedicated space in your home exclusively and regularly for business purposes. The "exclusive use" requirement is strictly applied.

Eligible Home Office Expenses for Employees

Calculating the Work-Space Percentage

Your deduction is limited to the proportion of your home used as a work space. The most common calculation method:

Work space percentage = (work space area in sq ft) ÷ (total home area in sq ft)

For example, if your home office is 120 sq ft in a 1,200 sq ft home, your work-space percentage is 10%. You can deduct 10% of eligible expenses.

Alternatively, you can use the number of rooms: if you use one room in a 10-room house, the percentage is 10%.

Home Office Expenses Cannot Create a Loss

For employees, home office expenses can only reduce employment income to zero — they cannot create a loss. Any unused expenses can be carried forward to the next year.

Self-employed individuals face a similar restriction: home office expenses cannot create or increase a business loss (though other rules apply).

Detailed Calculation Example

Assume you rent a 1,000 sq ft apartment with a 100 sq ft dedicated home office (10% work space). Your 2024 annual home costs were:

Required Documentation

• Signed T2200 from your employer (keep on file — do not submit with return)
• Receipts for all claimed expenses
• Floor plan or measurements showing work-space calculation
• Internet/phone bills with business portion highlighted

Form T777 vs. T777S

Use Form T777 if you are claiming other employment expenses in addition to home office (vehicle, supplies, etc.). If you are only claiming home office expenses and your employer completed a T2200, use Form T777S (simplified). Both flow to line 22900 of your T1 return.