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Home Office Expenses Calculator
Estimate the deductible portion of your home office costs (CAD) and the estimated GST/HST ITC based on business use of your home.
What you’ll enter
- Claim details (name, corporation, tax year, province)
- Home size and business-use space (square feet)
- Exclusive use vs. shared use (hours per week if shared)
- Internet business-use %
- Annual totals by expense type (mortgage interest, property taxes, utilities, insurance, internet, repairs, other)
- GST/HST settings (default rate, amounts include tax or not, overrides if needed)
What you’ll get
- Area %, Time %, and Combined business-use %
- Deductible claim total (CAD) by expense type and in total
- Estimated GST/HST ITC (CAD)
- Reimbursement summary totals
- Bookkeeper journal entry summary (Rent Expense, ITC, Due to Shareholder)
- Print-friendly certification and CSV export
Notes
- Mortgage principal is not deductible.
- Defaults are provided, but you can override tax rate / taxable portion where needed.
- Results update automatically as you change inputs.
↓ Scroll down to the calculator to enter your numbers.
SmartBookkeeper - Toolkit
Home Office Expense Claim - Calculator
1) Claim & Space Details
Area %
0.00%
Time %
0.00%
Combined %
0.00%
2) GST/HST ITC Settings
Defaults: mortgage interest/property taxes/most insurance are non-taxable; utilities & internet typically taxable.
Bookkeeper Journal Entry
Utilities Expense$0.00
Office Expenses$0.00
GST/HST Paid (ITC)$0.00
Due to Shareholder
3) Annual Home Expenses (Per Type)
Enter annual totals. Mortgage principal is not deductible.
Tip (mobile): swipe left/right to view all columns.
| Expense Type | Total Paid | Tax Paid (override) | Tax Rate (override) | Taxable Portion % | Business % | Deductible | ITC Amount |
|---|---|---|---|---|---|---|---|
| Mortgage Interest | 0.00% | $0.00 | $0.00 | ||||
| Property Taxes | 0.00% | $0.00 | $0.00 | ||||
| Heat / Electricity / Water | 0.00% | $0.00 | $0.00 | ||||
| Home Insurance | 0.00% | $0.00 | $0.00 | ||||
| Internet | 0.00% | $0.00 | $0.00 | ||||
| Repairs & Maintenance | 0.00% | $0.00 | $0.00 | ||||
| Other (specify) | 0.00% | $0.00 | $0.00 | ||||
| TOTAL | $0.00 | $0.00 | $0.00 |
4) Reimbursement Summary
Total Paid by Employee
$0.00
Deductible (Corp Reimburses)
$0.00
5) Estimated GST/HST ITC
Tax on Business Portion
$0.00
Print-Friendly Certification
Use Print to produce a signable copy.
Claimant Certification: I certify the above expenses were incurred and the calculation of business use is reasonable and compliant.
Claimant Signature: _________________________________ Date: ___________
Corporate Approval:
Approved for reimbursement: $_________________________
Authorized Signature: _______________________________ Date: ___________