Deducting Start-up Costs as a Sole Proprietor

Starting your own business is exciting, but the initial bills—office expenses, marketing, bank fees, and more—stack up fast. The bright side: tax rules allow you to claim a surprising amount of your start-up business expenses and keep more of what you earn.

Here's how to make the most of business deductions.

What you can write off for your start-up

Maximizing your business deductions starts with knowing which expenses are eligible. Let's break down expenses by category.

Home office expenses 

If you work from home, you can deduct a portion of household expenses. To qualify, your home office space must be your principal place of business or used exclusively to earn business income and meet clients, customers, or patients.

Examples of eligible home office expenses include:

• Cleaning materials
• Electricity and heating/cooling
• Home insurance and property taxes
• Mortgage interest or rent
• Capital costs such as equipment and furniture (deducted over several years)

For mixed-use spaces, like an apartment with a home office, calculate your deductions based on the hours or space devoted to business versus personal use. For example, if your apartment is 1,000 square feet and your home office is 100 square feet, you can deduct 10% of expenses.

For a shared-use space, determine your deductions this way:

• Calculate how many hours of the day you use the room(s) for your business.
• Divide that amount by 24 hours.
• Multiply your result by the business part of your total home expenses, based on your calculations above for the size of your workspace.

If you only use this space for your business for part of the week or year, reduce the amount you claim accordingly.

TIP: Do you want to transfer personal assets like a computer or a vehicle to your start-up? Learn how to transfer assets to your business in your first year.

Operating expenses

Day-to-day operating expenses will likely form a large part of a start-up's business deductions. Common deductions include:

• Office supplies and software subscriptions
• Advertising, website hosting, business tools
• Business tax, licence fees, annual association dues
• Accounting, insurance, and legal fees
• Salaries and company contributions
• Business start-up costs, interest, and bank fees

The Government of Canada provides detailed information on expense categories.

Meals and entertainment 

You can claim 50% of reasonable business-related meals and entertainment, such as events you attend with clients or meals eaten during a work-related conference.

The maximum amount you can claim is 50% of the lesser of:

• The amount incurred for the expenses
• An amount that's reasonable in the circumstances

The above limit doesn't apply in certain situations, such as:

• Businesses that regularly provide meals for compensation, like a restaurant
• Meals billed directly to clients
• Food or entertainment included in an employee's income
• Fundraising events for registered charities

The Government of Canada provides a detailed list of expenses where the 50% limit doesn't apply. Also, certain self-employed people, like couriers and long-haul truckers, have higher allowances for food and beverages.

Vehicle expenses

Sole proprietors can claim deductions for vehicles used to earn income if the amounts are reasonable and supported with documentation. Deductible expenses include:

• Licence and registration fees
• Fuel, oil, insurance, maintenance, and repairs
• Leasing costs or interest on vehicle loans
• Electricity costs for zero-emission vehicles
• Motor vehicles and some passenger vehicles (deducted over several years as a capital cost)

Keep a log of vehicle use for one full year to establish your base year for these deductions, and maintain supporting documentation. If you have multiple vehicles for your business, keep separate logs for each.

Vehicle records should include:

• Total kilometres driven
• Total kilometres driven for business purposes
• Date, destination, purpose, and number of kilometres driven for each business-related trip
• Odometer reading for the start and end of each fiscal period

Here's how to calculate eligible motor vehicle expenses:

• Divide the number of kilometres driven for business purposes by the total number of kilometres driven.
• Add up vehicle expenses for the year (gas, insurance, etc.).
• Multiply these two numbers to get the amount, in dollars, you can deduct.

The deductions you can claim depend in part on the vehicle type, and farming and fishing businesses have special rules. See the Government of Canada website for details.

Travel expenses

Business-related travel expenses can include transportation, event fees, accommodations, and meals. The 50% rule for meals, beverages, and entertainment also applies here.

Conventions are a common source of business travel expenses. You can deduct the cost of attending up to two conventions each year if they:

• Relate to your business or professional activity
• Are held by a business or professional organization in its usual location for business activities

If the convention fee includes meals or entertainment, subtract $50 per day before applying the 50% rule.

Professional development and education

You can deduct reasonable education and professional development expenses used to earn business income by maintaining or improving your related skills. These deductions can include:

• Industry courses, workshops, or certifications
• Professional memberships and conference fees
• Subscriptions
• Reference materials

To claim a tax deduction, the training must be directly related to your business. For example, education that helps you do your existing work is often deductible, but training for a different career might not be. Keep receipts and be ready to show how the training supports your income-earning work.

Bank charges and interest

Many of the financial costs of running a business can be deducted from your sole proprietor taxes, including:

• Bank fees on business accounts
• Interest on business loans
• Fees on business loans, such as application fees

Interest on personal loans is not deductible.

Bad debts

If a client fails to pay, you can deduct the amount as business debt. The debt must be genuinely uncollectible in the year claimed, meaning you made reasonable efforts to get paid and have little chance of doing so. You can't deduct invoices that are merely overdue or haven't been reported as income.

As always, clear documentation is important. Keep records of:

• Your original invoice
• Proof the invoice was included in your business income for the relevant time period
• Your attempts to collect the amount owed

Learn more about claiming tax deductions for your start-up.

How to separate personal from business expenses

You can deduct expenses incurred to earn business income, but not personal or living costs. Separating business and personal expenses makes tax filing easier and reduces the risk of errors and deduction denials. Here are some tips for tracking business expenses:

• Open a business banking account and get a business credit card.
• Classify banking transactions by category and track expenses in a spreadsheet as they occur, noting their business purpose.
• Keep receipts and records organized and labelled with their business-related purpose.
• Back up your electronic documentation.

Mixed-use expenses—like home office costs, vehicle expenses, equipment, or phone/internet bills—can be partially claimed using a method that's reasonable and consistent. Whichever method you use for a particular mixed-use expense, apply it consistently year after year.

Why documentation matters (and what the CRA expects)

As a sole proprietor, one of the best habits you can develop is keeping organized business records. This will help you identify your income sources, track expenses, and defend your deductions if the Canada Revenue Agency (CRA) inquires. Here are examples of things to keep:

• Income records: Sales invoices, deposit slips, contracts, other proof of revenue
• Expense records: Detailed vouchers or receipts, expense journal for undocumented transactions
• Supporting financial documents: Cancelled cheques, bank statements, GST/HST records, related correspondence

You must retain business records and supporting documentation for your start-up for at least six years from the end of the last calendar year they relate to. The CRA might require you to keep records for longer—for example, if you're audited. In a tax review or audit, the burden of proof is on you to show that your claimed income and expenses are accurate and business-related.