Home Office Deduction Cross-Border: Canada-US Rules

Home office deductions work differently in Canada and the US, and the cross-border dimension adds complications that neither country’s domestic rules were designed to handle. Canada allows employees and self-employed individuals to claim home office expenses under ITA 8(13) (employees) and ITA 18(12) (self-employed). The US eliminated the home office deduction for employees with the Tax Cuts and Jobs Act (2018, through 2025), but self-employed individuals can still claim it under IRC 280A. For cross-border workers, the home office also has implications for permanent establishment risk, income sourcing, and which country gets to tax the income earned from that office.

How does the Canadian home office deduction work?

Canada provides two methods for employees and one approach for self-employed individuals:

Employees (ITA 8(13)):

The employee must meet one of two conditions:

• The home office is the place where you “principally” (more than 50% of the time) perform your employment duties, OR
• You use the office exclusively to earn employment income and use it regularly for meeting customers or other persons in the course of employment

The employer must certify the arrangement on Form T2200 (Declaration of Conditions of Employment). Without the T2200, the deduction is unavailable.

Detailed method. Claim a proportionate share of actual expenses: rent, utilities (electricity, heat, water), home insurance, maintenance, and internet. The proportion is based on the size of the workspace relative to the total home (square footage or number of rooms). Mortgage interest and property taxes are not deductible for employees (they are for self-employed individuals). Capital cost allowance (depreciation) is available but generally not recommended because it can reduce the principal residence exemption.

Flat rate method. Introduced during COVID and extended, the flat rate method allows $2 per day worked from home, up to $500 per year. No receipts, no T2200 required for the flat rate method (the employer confirms on a simplified T2200S). The flat rate is simpler but usually produces a smaller deduction than the detailed method for full-time remote workers.

Self-employed (ITA 18(12)):

Self-employed individuals deduct home office expenses on Form T2125 (Statement of Business or Professional Activities). The eligible expenses are broader than for employees: mortgage interest, property taxes, home insurance, utilities, maintenance, and CCA are all deductible proportionately. The home office deduction cannot create or increase a business loss; it can only reduce business income to zero, with the excess carried forward.

How does the US home office deduction work?

Employees: the home office deduction for employees was suspended by the Tax Cuts and Jobs Act (2018) and remains suspended through 2025. Employees who work from home cannot deduct home office expenses on their US return, even if the employer requires them to work from home. This suspension applies to W-2 employees only; independent contractors are not affected.

Self-employed (IRC 280A):

Self-employed individuals claim the deduction on Schedule C (Profit or Loss from Business). Two methods:

Regular method. Deduct the actual expenses of the home office (mortgage interest, property tax, utilities, insurance, depreciation, repairs) proportionate to the business-use percentage. The business-use percentage is calculated by square footage or number of rooms. The home must be used “regularly and exclusively” for business (with an exception for a separate structure and for storage of inventory).

Simplified method. $5 per square foot of the home office, up to 300 square feet ($1,500 maximum). No depreciation recapture on sale.

The US deduction, like Canada’s, cannot create a loss from the home office (for the simplified method; the regular method has specific ordering rules under IRC 280A(c)(5) that limit the deduction to gross income from the business use).

What are the cross-border complications?

1. The PE question. A home office in one country can create a permanent establishment for a business conducted in the other country. Under Article V of the Canada-US treaty, a PE includes a “fixed place of business” through which the business is carried on. A home office used regularly and primarily for business can qualify. If a Canadian freelancer maintains a home office in Toronto from which they serve US clients, the Toronto office is a Canadian PE. The income earned through that PE is Canadian-source. If a US citizen operates a business from a home office in Vancouver, the Vancouver office is a Canadian PE, and the income is Canadian-source even though the business may be organized in the US.

2. Dual deductions. If you maintain home offices in both countries (one in each home, as a split-time worker), the expenses are deductible in the country where each office is located. The income attributable to each office is sourced to that country. You cannot deduct the Canadian home office on the US return (it is a foreign expense) or the US home office on the Canadian return. Each deduction reduces only the income sourced to that country.

3. Employee vs. self-employed mismatch. If you are an employee working from a home office in Canada for a US employer, Canada allows the deduction (with the T2200 or flat rate), but the US does not (TCJA suspension for employees). If you are self-employed, both countries allow the deduction on their respective returns.

4. CCA and depreciation. Canada’s CCA on the home office can reduce the principal residence exemption (PRE) for the portion of the home used for business. The US depreciation (under the regular method) creates depreciation recapture on the sale of the home, which is not excluded by Section 121. Cross-border homeowners need to consider both countries’ consequences before claiming CCA or depreciation on the home office.

What about the TCJA employee deduction suspension?

The TCJA suspended the employee home office deduction (previously available under IRC 67 as a miscellaneous itemized deduction subject to the 2% floor) from 2018 through 2025. This means:

• US employees working from home in the US: no deduction.
• US employees working from home in Canada: no US deduction. The Canadian deduction is available (with the T2200).
• Canadian employees working from home in Canada for a US employer: Canadian deduction available. No US deduction.

The suspension is scheduled to expire after 2025. If it expires, the employee deduction returns as a miscellaneous itemized deduction subject to the 2% AGI floor, which limits its value for most taxpayers. Self-employed individuals are unaffected by the suspension.

What should I do next?

If you work from home and have cross-border obligations, determine first where the work is performed (that sets the income sourcing), then whether the home office creates a PE (that sets the taxing jurisdiction), and finally what deductions are available in each country.

• Remote work cross-border, the broader remote work tax rules including PE risk
• Self-employed cross-border, the freelancer-specific treaty and withholding rules
• Digital nomad tax, the rules for nomads splitting time between countries
• Principal residence exemption cross-border, the PRE and why CCA on the home office can reduce it
• Selling your home cross-border, the Section 121 exclusion and PRE interaction on sale

This guide is general information, not tax advice for your specific situation. Which points apply, and how, depends on your facts.