Business Expenses You're Probably Missing (Canadian Corporation)

Most Canadian corporation owners know to deduct the obvious expenses: office rent, accounting fees, software subscriptions. But there's a long list of legitimate business expenses that routinely get missed, either because they feel too small, too personal, or too uncertain to claim.

Every missed deduction is money left on the table. Here are the ones we see overlooked most often.

Phone and Internet

If you use your personal phone and home internet for business, a portion of those costs is deductible. The CRA allows you to claim the business-use percentage of these expenses.

The key is documenting a reasonable business-use percentage. If you use your phone 50% for business calls, emails, and messaging, claim 50%. CRA doesn't require itemized call logs, but you should be able to justify the percentage if asked.

Professional Development

Training courses, online learning platforms, conferences, books, and certifications related to your business are all deductible. This includes:

• Online courses (Udemy, Coursera, LinkedIn Learning subscriptions)
• Industry conferences and workshops (including travel costs to attend)
• Professional books and publications
• Certification exams and renewal fees
• Coaching and mentorship programs

Many solo corp owners pay for courses throughout the year and forget to categorize them as business expenses. A $500 annual learning budget is a $500 deduction.

Professional Association Dues and Memberships

Membership fees for professional organizations related to your business are deductible. Examples:

• Industry associations (CPABC, Engineers Canada, etc.)
• Chambers of Commerce
• Professional networking groups
• Trade organizations
• Coworking space memberships

Business Insurance

Several types of insurance are deductible business expenses:

• Professional liability (E&O) insurance - Essential for consultants and service providers
• General liability insurance - Covers your business operations
• Cyber liability insurance - Increasingly important for tech businesses
• Directors and officers (D&O) insurance - Covers you in your role as a corporate director
• Business interruption insurance - Covers lost revenue during disruptions

The premiums for these policies are fully deductible. If you're paying $1,500/year for professional liability insurance, that's a $1,500 deduction many owners don't think to categorize.

Vehicle Expenses

If you use your personal vehicle for business (client meetings, supply runs, bank visits), you can deduct the business-use portion. You have two options:

Option 1: Actual Expenses

Track all vehicle costs (gas, insurance, maintenance, depreciation) and multiply by your business-use percentage based on a mileage log.

Option 2: CRA Mileage Rate

For 2025/2026, the CRA's reasonable per-kilometre allowance rates are:

If you drive 3,000 km for business in a year, that's a $2,160 deduction using the CRA rate. The catch: you need a mileage log. Record the date, destination, purpose, and distance for each business trip.

Bank Fees and Interest

Corporate bank account fees, credit card annual fees, and interest on business loans or lines of credit are all deductible. These small monthly charges add up:

Software and Digital Tools

Every software subscription used for business is deductible. Common ones that get missed:

• Cloud storage (Google Workspace, Dropbox, iCloud for business use)
• Design tools (Figma, Canva Pro, Adobe Creative Cloud)
• Project management (Asana, Notion, Linear)
• Communication tools (Slack, Zoom)
• Domain names and hosting
• Password managers (1Password, Bitwarden)
• Accounting software

Track these carefully. Many owners pay for subscriptions monthly and never aggregate them as business expenses. A dozen $10-$30/month subscriptions easily total $2,000-$4,000 annually.

Meals and Entertainment

Business meals (with clients, prospects, or business associates) are 50% deductible. The full amount is recorded as an expense, but only half is deducted on your tax return.

To claim a meal expense, document:

• Date and location
• Name and business relationship of the person you dined with
• Business purpose of the meeting

A weekly client lunch at $30 is $1,560/year, of which $780 is deductible. These small amounts add up fast.

Legal and Professional Fees

Beyond accounting fees, other professional services are deductible:

• Legal consultations and contract reviews
• Business consulting fees
• Trademark registration costs
• Patent filing fees
• HR or payroll service fees

The Hidden Cost of Missing Deductions

Let's add up what a typical solo corp owner might miss in a year:

At a combined corporate tax rate of 11% (BC small business rate), that's $1,142 in unnecessary tax. At the general rate of 27%, it's $2,803.

These aren't aggressive deductions. They're ordinary business expenses that the CRA fully expects you to claim. You just have to track them.

How ledg Helps

ledg's auto-categorization catches these commonly missed expenses and sorts them into the correct categories. When a transaction comes in, ledg suggests the right category based on the vendor, so your phone bill, software subscriptions, and professional dues are captured correctly from the start.