Work-Space-in-Home Expense Worksheet (Canada)
If you use part of your home for business, CRA’s work-space-in-home rules let you deduct a portion of eligible home expenses — but the calculation requires the right square footage math and expense allocation. This worksheet walks through the CRA-specific approach.
Included in the $7/mo Tools Club · Works in Excel or Google Sheets · Includes a built-in AI prompt
Who this is for
- Self-employed individuals and freelancers working from a home office in Canada
- Small business owners with a dedicated home workspace
- Anyone unsure whether their home workspace qualifies under CRA rules
- Business owners wanting to maximize a legitimate deduction with proper documentation
What's included
- Work space and total home square footage inputs
- Automatic business-use percentage calculation
- Eligible home expense allocation (utilities, insurance, maintenance) applied to that percentage
- Built-in AI prompt to review whether your setup likely qualifies under CRA rules
Why use a template instead of starting from scratch?
CRA’s work-space-in-home deduction has specific eligibility rules, and the calculation requires accurately allocating a percentage of shared home expenses. Getting either piece wrong either costs you a legitimate deduction or creates risk if the space doesn’t actually qualify.
How to Use This Template
Download and open in Excel or Google Sheets
Requires a Tools Club membership — log in first to access the file.
Measure your work space and total home square footage
This is the basis for the business-use percentage calculation.
Enter your eligible home expenses for the year
Utilities, home insurance, and maintenance are commonly eligible under CRA rules — confirm the current eligible list.
Review the automatic deduction calculation
This applies your business-use percentage to the relevant home expenses.
Run the built-in AI prompt to review eligibility
Attach the saved file to ChatGPT or Claude and ask whether your setup sounds like it meets CRA’s general eligibility criteria — then confirm with a tax professional.
Built-in AI prompt
Once you've filled this template in, it includes a ready-to-use prompt at the bottom of the sheet. Attach your saved file to ChatGPT, Claude, or any AI chat tool and paste it in — you'll get plain-English feedback on whether your work space setup sounds like it meets CRA’s typical eligibility criteria, and what to confirm with a tax professional, no accounting background required.
Common Mistakes to Avoid
Claiming a space that doesn’t meet CRA’s specific use tests
CRA generally requires the space be your principal place of business, or used exclusively and regularly to meet clients — confirm your setup meets the applicable test.
Measuring square footage inaccurately
The business-use percentage calculation depends directly on accurate measurements — remeasure rather than estimating.
Forgetting to include all eligible shared expenses
Utilities, insurance, and maintenance are often only partially remembered — a complete list produces a more accurate deduction.
Not checking current CRA guidance
CRA’s specific rules and eligible expense list can be updated — verify current guidance rather than relying on prior-year rules.
Frequently Asked Questions
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