Home Office Expenses 2025: Detailed Method vs. Flat Rate — Which Wins?

Key takeaways

• The temporary flat rate method ($2/day) ended after the 2022 tax year
• All 2025 home office claims require the detailed method — employer must complete Form T2200
• The workspace must be your principal place of work (more than 50% of your time) OR used exclusively and regularly to meet clients
• Calculate the workspace percentage using either square footage or number of rooms
• Eligible expenses include a proportionate share of rent, utilities, internet, and home insurance

The CRA's COVID-era flexibility ended after 2022. For the 2023, 2024, and 2025 tax years, employees who want to claim home office expenses must use the detailed method — which requires employer sign-off on Form T2200 and meticulous recordkeeping.

T2200 requirements

Form T2200, Declaration of Conditions of Employment, must be signed by your employer. The employer certifies that you were required to work from home, that you paid expenses not reimbursed by your employer, and (where relevant) that you work from home more than 50% of the time.

You do not submit the T2200 with your return — you keep it in case the CRA asks for it. The CRA regularly requests T2200s in correspondence audits of home office claims, so the signature must be authentic and the form completed accurately. Do not sign your own T2200.

Qualifying workspace conditions

To qualify for home office expenses, your home workspace must meet one of two conditions: it is where you principally perform your employment duties (more than 50% of your working time), or you use it exclusively to meet customers or clients on a regular and continuous basis.

The 50% test is based on the proportion of time you work in the home workspace relative to all work locations. If you spend 3 out of 5 working days in your home office and go to the employer's office 2 days a week, you likely meet the 50%+ threshold. Hybrid workers who go to the office 3+ days a week may not.

Calculating the workspace percentage

You need to determine what percentage of your home is used as the workspace. The CRA accepts two methods: a square footage calculation (workspace square feet divided by total home square feet) or a room count method (number of rooms used as workspace divided by total rooms).

A dedicated home office in a 2,000 sq ft home might be 150 sq ft — a 7.5% proportion. Apply that percentage to eligible expenses. If you use a shared space (like a dining room), you may only claim expenses for the hours it is used as a workspace versus total hours in the year — creating a dual percentage calculation.

Eligible expenses

Employees (not commissioned sales employees) can deduct: a proportionate share of rent; heat, home electricity, and water; internet (but not home phone); and home insurance premiums. They cannot deduct mortgage interest, property tax, or capital cost allowance on their home.

Commissioned employees (with a T2200 confirming commission-based remuneration) can deduct the same expenses as regular employees, plus property taxes and home insurance premiums at the workspace percentage.

Self-employed individuals follow different rules under business expenses rather than employment expenses, and can potentially claim more — including CCA on the home, mortgage interest, and home repairs that relate to the work area.

The maximum deduction rule

Home office expenses for employees cannot create or increase an employment loss. In other words, your deduction is limited to your employment income for the year — you cannot use home office expenses to reduce other income to below zero. Unused amounts can be carried forward to the next year against future employment income.