Taxes
What Expenses Can I Write Off as a Sole Proprietor?
Learn which business expenses a Canadian sole proprietor can write off today, how CRA deduction rules work, and what records you should keep on file.
As a sole proprietor in Canada, you can write off business expenses that you incur to earn business income — office supplies, phone and internet costs, professional fees, and a reasonable share of home office and vehicle costs. The Canada Revenue Agency (CRA) lets you deduct those amounts from your revenue on Form T2125, which you file with your personal T1 return. Only the resulting net profit is taxed, at your personal marginal rate.
What makes an expense deductible?
The test is purpose, not paperwork. An expense is generally deductible if it was incurred to earn business income, it is reasonable in the circumstances, and it is not a personal or living expense. You also cannot deduct items the law specifically disallows, such as most capital purchases in the year you buy them — those are handled through capital cost allowance instead.
Two principles drive most CRA reviews:
- Business purpose: you should be able to explain how the cost helped you earn income.
- Business-use proportion: if something is used for both personal and business purposes, you typically claim only the business share.
A deduction reduces taxable income; it is not a dollar-for-dollar refund. That is why good records matter more than aggressive claims.
Common deductible business expenses
Most day-to-day operating costs of a sole proprietorship are deductible. The categories below are typical, but confirm current rules and any limits on the CRA website or with a tax professional.
| Expense category | How it is generally treated |
|---|---|
| Advertising and promotion | Deductible when it relates to your business |
| Office supplies and small tools | Deductible in the year purchased |
| Phone and internet | Business share only, if you also use them personally |
| Professional fees (accounting, legal) | Deductible when incurred for business purposes |
| Business insurance and licences | Ordinary operating costs |
| Rent for commercial space | Deductible; a home office is calculated separately |
| Travel away from your local area | Deductible for business trips; keep receipts and the reason for travel |
| Meals and entertainment | Business portion only, and CRA generally limits how much you can claim |
| Vehicle fuel, insurance, repairs | Claimed in proportion to business kilometres driven |
| Fees paid to subcontractors | Deductible; you may need to issue a T4A slip for fees paid to an individual |
Home office and vehicle expenses
If you work from home, you can generally deduct a reasonable portion of household costs such as utilities, insurance, and rent or property tax, calculated by business use. CRA accepts more than one method, so it is worth understanding the differences and the restrictions on claiming costs that also relate to the whole home. See the guide to the home office expense deduction for the current methods and what evidence CRA expects.
For a vehicle, you typically claim the business percentage of fuel, insurance, repairs, licence fees, and lease or interest costs. A contemporaneous logbook showing date, destination, purpose, and kilometres is the strongest support for your percentage. The vehicle expense deduction guide walks through how to build that record.
Capital assets and capital cost allowance
Computers, furniture, equipment, and vehicles are capital assets, not everyday expenses. Instead of deducting the full cost at purchase, you generally write them off over time through capital cost allowance (CCA), using classes and rates set by regulation. Special rules can apply in the first year an asset is acquired, and some assets qualify for enhanced treatment. Rates and class assignments change, so verify the current schedule before filing — the capital cost allowance (CCA) guide explains the mechanics.
Expenses you generally cannot write off
Some costs are off limits or heavily restricted:
- Personal living expenses, including ordinary groceries, clothing, and personal travel
- Your own draw of money from the business — that is not a deductible expense
- Fines and penalties, such as traffic tickets
- The personal portion of mixed-use expenses
- Political contributions and most club dues
- Costs incurred to earn income that is not taxable
How to claim business expenses on your return
You total your expenses by category on Form T2125, Statement of Business or Professional Activities, then subtract them from gross business income to arrive at net income, which flows into your T1 return. Expenses claimed for income tax purposes are separate from GST/HST input tax credits. Keeping the two tracked separately avoids confusion, especially if you are registered for GST/HST. The Form T2125 explained guide covers each line, and how to file taxes as a sole proprietor covers the filing sequence and deadlines.
Keeping records, receipts, and GST/HST
CRA generally expects you to keep supporting records, including receipts and invoices, for at least six years from the end of the last tax year to which they relate. Digital copies are usually acceptable if they are legible and complete. If you are registered for GST/HST, the tax you pay on business purchases may be recoverable as an input tax credit (ITC), which is claimed separately from your income tax deductions. Today, CRA My Business Account remains the main place to update your Business Number, file returns, and review your account.
This page is general information only and is not legal or tax advice. Rules and limits change, so confirm the current position for your situation on canada.ca or with a qualified accountant.
Frequently asked questions
What business expenses can a sole proprietor write off in Canada?
You can generally deduct costs incurred to earn business income, such as office supplies, advertising, phone and internet, professional fees, business insurance, rent for commercial space, and travel. Mixed-use items like a home office or vehicle are claimed in proportion to business use. Capital assets such as computers go through capital cost allowance instead. Confirm current rules and limits on the CRA website.
Can I write off my home office as a sole proprietor?
Yes, if you use part of your home to earn business income. You generally deduct a reasonable share of household costs, such as utilities, insurance, and rent or property tax, based on business use. CRA accepts more than one calculation method, and some costs are restricted. Keep your measurements and supporting bills, and confirm the current method on the CRA website.
Are meals and entertainment deductible for a sole proprietor?
They can be, but only the business portion and subject to CRA limits — CRA generally allows less than the full amount. Recording who attended, the date, the place, and the business purpose is important, because this is a category CRA reviews closely. Confirm the current limit for your situation before claiming.
Do I need receipts to claim business expenses?
Strong support means a receipt or invoice showing the supplier, date, and amount, plus a note explaining the business purpose. CRA generally expects records to be kept for at least six years from the end of the last tax year they relate to. Bank or credit card statements alone may not be enough, so retain original documents or clear digital copies.