How to Track Business Expenses in Canada
The Canada Revenue Agency expects businesses to maintain records that support every deduction claimed on a return — and to keep those records for a minimum of six years from the end of the tax year they relate to. For most small businesses, the gap between what gets spent and what gets documented is the primary source of problems at filing time.
This article covers the mechanics of tracking expenses in a way that holds up under scrutiny: how to categorize what you spend, what counts as adequate documentation, and the practical difference between a manual approach and software-assisted tracking.
What the CRA considers a valid business expense
Under the Income Tax Act, a business expense must be incurred for the purpose of earning income. That sounds simple, but the line becomes unclear in a number of common situations — a vehicle used partly for personal driving, a home office, a meal with a client, or a subscription that serves both professional and personal purposes.
The CRA's publication T4002 — Self-employed Business, Professional, Commission, Farming, and Fishing Income describes the categories accepted for deduction and the limitations that apply to each. The most relevant for a typical small business include:
- Advertising and promotion — website hosting, digital advertising, print materials related to the business
- Office expenses — supplies consumed in the office, not furniture or equipment
- Rent — the portion of rent attributable to business use, if working from a commercial space
- Business use of home — a calculated portion of home costs when the workspace meets CRA's criteria
- Motor vehicle expenses — the business-use portion of fuel, insurance, maintenance, and depreciation
- Meals and entertainment — generally limited to 50% of the amount actually paid
- Professional fees — accounting, legal, and other professional services related to the business
- Telephone and utilities — the business-use portion
The documentation the CRA expects
A bank or credit card statement is not sufficient on its own. The CRA expects source documents — original receipts, invoices, or contracts — that show:
- The date of the transaction
- The vendor name
- The amount paid, including any applicable taxes
- A description of what was purchased
For mixed-use expenses — a vehicle or a home office — additional records are needed. Vehicle use requires a logbook that records the date, destination, purpose, and kilometres driven for each business trip, along with total annual kilometres. Home office use requires a calculation of the proportion of the home dedicated exclusively and regularly to business activity.
Digital copies of receipts are acceptable to the CRA provided they are legible and accurately reflect the original. Photographs taken immediately after purchase and stored in a consistent folder structure or a dedicated app are a reliable approach. Paper receipts that fade — particularly thermal receipts — are a common documentation problem; photographing them the same day avoids losing the record.
Categorizing expenses consistently
The specific category used for an expense matters less than using the same category consistently from one year to the next. If advertising costs are recorded under "advertising" in 2024 and under "office expenses" in 2025, the year-over-year comparison on a return becomes misleading. Inconsistency in categorization is not fraudulent, but it does invite questions.
A practical starting point is to build your chart of accounts to mirror the line items on Form T2125 (Statement of Business or Professional Activities). That way, totals from your records map directly to the form without adjustment.
Manual tracking versus software
A spreadsheet with clearly labelled columns — date, vendor, description, category, amount before tax, GST/HST paid — is entirely adequate for a business with moderate transaction volume. The CRA has no requirement that records be kept in any particular format; it requires only that they be complete and retrievable.
Software becomes worth considering when transaction volume is high enough that manual entry creates a meaningful time cost, when GST/HST input tax credit calculations need to be tracked systematically, or when the business has employees and needs to integrate payroll. A comparison of commonly used options in Canada is covered in the accounting software article on this site.
Separating business and personal finances
A dedicated business bank account and credit card is not a CRA requirement for sole proprietors — but it eliminates the most time-consuming aspect of bookkeeping. When business and personal transactions run through the same account, every statement entry must be reviewed individually to identify which is which. That review takes substantially longer than simply recording all transactions from a business-only account.
For incorporated businesses, commingling personal and corporate funds raises additional issues around shareholder benefits and can affect the corporation's liability protection. A separate account is standard practice for any corporation from the date of incorporation.
The six-year retention requirement
The CRA's standard audit period is three years from the date of the original notice of assessment. However, the agency can request records going back six years from the end of the tax year in question. If a return is filed for the 2025 tax year and assessed in April 2026, records from that year must be retained until at least the end of 2031.
This means that a receipt lost or deleted in 2026 may create an unresolvable documentation gap six years later. The safest approach is to treat expense documentation as permanent until confirmed that the relevant tax year is outside the six-year window.
Home office expenses: the calculation
For businesses where part of a home is used exclusively and on a regular basis for business, a portion of home costs can be deducted. The CRA accepts two calculation methods:
- The area of the workspace as a percentage of total home area
- The number of rooms used for business as a proportion of total rooms
The same method must be applied consistently from year to year. Deductible home costs include heat, electricity, property taxes (for the self-employed), maintenance and repairs, and mortgage interest (for the self-employed, not for employees). Rent is fully deductible at the business-use percentage for renters. Capital cost allowance on the home itself is generally not claimed because it can affect the principal residence exemption on a future sale.
Motor vehicle: the logbook
Without a logbook, the CRA may disallow vehicle expenses entirely on audit. The logbook must record each business trip with the date, starting point, destination, purpose, and kilometres driven. Total annual kilometres — business and personal — are recorded as well so the business percentage can be calculated.
An alternate method exists for businesses where the vehicle use pattern is consistent year to year: a full logbook for one base year, followed by three-month sample logbooks in subsequent years. The sample must fall within the same season as the base year log and must show that usage has not changed materially. This is described in detail in the CRA's motor vehicle expenses guidance.
Meals and entertainment: the 50% limit
Only 50% of the amount paid for meals and entertainment in the course of business is deductible, with certain exceptions. The exceptions include amounts included in an employee's income as a taxable benefit, meals provided at a work site that qualifies as a remote or special work location, and meals consumed during a convention attendance (subject to the $50 per day limit for convention meals). The 50% restriction applies after all other conditions for deductibility are met.
What to do if records are incomplete
If records for a past year are incomplete — receipts lost, bank accounts closed — reconstruction is possible but requires care. Bank and credit card statements can establish that a payment was made. Vendor records, email confirmations, and calendar entries can help establish purpose and date. The CRA does not automatically accept reconstructed records as equivalent to original source documents, but a well-documented reconstruction is far better than no record at all.
For forward-looking practice, the simplest preventive measure is a weekly review: matching all business account transactions against receipts or invoices on hand, noting anything missing, and following up immediately while the purchase is recent.