Compliance
Compliance Update: Properly Claiming Home Office Expenses Under New Rules
Starting in the 2023 tax year, none of the temporary flat-rate options apply: employees must use detailed expenses to claim home-based work expenses.
By NomadicTax Research Team • 5-8 min read • May 11, 2026
## What changed for home office expense claims
Beginning **with the 2023, 2024, 2025… and 2026 tax years**, the **temporary flat-rate method** for claiming work-from-home expenses is **no longer available**. Employees must now use the **detailed method**, which requires tracking actual expenses and prorating based on the workspace size and usage. ([canada.ca](https://www.canada.ca/en/revenue-agency/services/tax/individuals/topics/about-your-tax-return/tax-return/completing-a-tax-return/deductions-credits-expenses/line-22900-other-employment-expenses/work-space-home-expenses/what-changes.html?utm_source=openai))
## Who is affected and eligibility
- Employees who worked from home, either full-time or part-time, for their employer in 2023 or later.
- Those who were previously using flat-rate method (e.g., simplified claims) now need detailed records.
- Not freelancers: self-employed persons have always used actual costs method.
- Only certain expenses allowed: heating, electricity, maintenance, lease, home insurance, property tax, etc., that are directly related to maintaining the workspace. Mortgage interest or property capital cost allowances generally not allowed for employees.
## How to calculate using the detailed method
1. **Determine workspace size**: Size in square-feet/meters of workspace vs the total finished area of the home.
2. **Track eligible expenses**: Only those costs related to the workspace or essential to it. Keep receipts for utility bills, maintenance, repairs, insurance, etc.
3. **Pro rata apportionment**: Use ratio of workspace area/total home area to allocate shared costs. E.g., workspace 150 sq ft in 1,500 sq ft home = 10 %.
4. **Usage factor**: If workspace also serves non-work activities, must adjust accordingly.
5. **Complete the appropriate form**: Employees use **Line 22900 – Other employment expenses** when filing. Must have T2200 or equivalent signed by employer confirming the work-from-home requirement.
## Example
- Sarah works from home 5 days/week for employer; her workspace is 120 sq ft, home is 1200 sq ft (10 %). She pays $300/month in heating & electricity, $1,200/year property tax, $600/year home insurance relevant to her home. She can prorate those shared expenses by 10 % to compute her claim.
- Total eligible expenses: utilities = $300×12 = $3,600 → 10 % = $360; property tax = $1,200 → 10 % = $120; insurance = $600 → 10 % = $60. Total = **$540 claim**.
## Common mistakes to avoid
- Using flat-rate when not eligible (mistakenly trying to use flat when detailed required).
- Missing T2200 or employer declaration. Without it, CRA may reject the claim.
- Not keeping proper records: receipts, size measurements. Vague estimates often not accepted.
- Claiming disallowed items like mortgage principal, mortgage interest, home renovation unrelated to workspace.
## Tips for smoother compliance
- At year’s end, gather all bills & invoices for home-office related maintenance.
- When setting up workspace, measure precisely and document layout to support area ratio.
- Ask employer early for signed forms (T2200 or equivalent).
- Use CRA’s guides & folios (e.g. Claiming home space expenses, folio S1… for detailed criteria) to ensure your inclusion of eligible expenses.
**Bottom line:** The flat-rate method is gone for years beginning in 2023. If you’re claiming home office deductions, detailed method is mandatory. Stay organized, keep receipts, get proper employer declarations—it can make a difference in your return.