Work-From-Home Deduction Calculator Canada 2025
Calculate your work-from-home tax deduction using the simplified flat-rate method ($2/day) or the detailed method (T777S), and find which saves you more.
Estimates use 2025 federal + provincial rates. Not financial advice.
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How to Use This Calculator
Tab "Quick Estimate"
Enter the number of days you worked from home during the tax year, your province, and your employment income. The calculator applies the simplified flat-rate method: $2 per day, up to a maximum of 250 days ($500). No receipts or employer forms are needed. You must have worked from home more than 50% of the time for at least 4 consecutive weeks.
Tab "Detailed Method"
Enter your total home size and office space in square feet, plus your work-use percentage (hours worked at home divided by total work hours). Then expand "More options" to enter your actual expenses: rent (for renters), utilities, internet, phone (business portion), maintenance, and office supplies. The calculator computes your proportionate deduction using Form T777S. This method requires a signed T2200S from your employer.
Tab "Simplified vs Detailed"
Enter inputs for both methods and see a side-by-side comparison. The calculator shows which method gives a higher deduction and recommends the best option. Key insight: renters almost always benefit more from the detailed method (rent is the largest deductible expense). Homeowners often do better with simplified (mortgage interest and property tax are not deductible).
The Formulas
Deduction = Days worked from home × $2/day
Maximum = 250 days × $2 = $500/year
Detailed method (T777S):
Office proportion = Office sq ft ÷ Total home sq ft
Deduction = Total eligible expenses × Office proportion × Work-use %
Eligible expenses (detailed):
Rent + Utilities (electricity, heat, water) + Internet + Phone (business portion) + Maintenance + Office supplies
NOT eligible (detailed):
Mortgage interest, property tax, home insurance, furniture, capital cost allowance (CCA)
Tax saving:
Tax saving = Deduction × Combined marginal tax rate (federal + provincial)
The simplified method became permanent starting with the 2023 tax year. You can choose either method each year — pick whichever gives the higher deduction. Commission employees may also claim insurance and property tax under the detailed method using Form T777.
Example
Alex — Remote worker in Toronto, renter, $1,800/month rent
Alex rents an 800 sq ft apartment in Toronto and uses a 150 sq ft room as a dedicated home office. They worked from home 200 days in 2025, which is 80% of their total work hours. Annual income: $75,000.
Alex should use the detailed method — the $3,870 deduction is nearly 10 times the $400 simplified amount. The rent component alone accounts for most of the difference. Alex needs a T2200S from their employer and should keep all receipts.