The Home Office Deduction: What Canadian Freelancers Can Actually Claim

The home office deduction (technically called 'workspace in the home expenses' on Form T2125) allows self-employed Canadians to deduct a proportional share of their home costs when they use part of their home exclusively for their business. Unlike employees who briefly used a flat-rate method during the pandemic, self-employed individuals have always used the detailed method — and it's more generous than most people realize.

Eligibility: When Can You Claim?

To claim home office expenses as a self-employed individual, your home workspace must meet at least one of two conditions: it must be where you principally perform your work (more than 50% of your working hours), OR it must be used exclusively on a regular and continuous basis to meet clients, customers, or patients. Meeting either condition qualifies you — you don't need to meet both.

How to Calculate the Business-Use Percentage

• Measure the square footage of your dedicated workspace
• Divide by the total finished square footage of your home
• Multiply the result by 100 to get your business-use percentage
• Example: 120 sq ft office in a 1,200 sq ft home = 10% business use
• If you use common areas part-time, the CRA accepts a reasonable estimate based on hours of use

What Expenses Can You Deduct?

Apply your business-use percentage to the following home expenses to calculate your deductible amount. For renters, the full rent is the base; for homeowners, mortgage interest, not the principal repayment, is deductible.

• Rent (if renting) — applies full business-use percentage
• Mortgage interest (not principal) — applies business-use percentage
• Home insurance premiums
• Property taxes
• Utilities: heat, electricity, water
• Internet service (business-use portion — often claimed separately)
• Maintenance and minor repairs attributable to the workspace
• Capital Cost Allowance on the home portion (use with caution — can affect principal residence exemption)