How to Track Business Expenses as a Self-Employed Contractor in Canada

You're leaving money on the table.

Every receipt you forget is a tax deduction gone. Every expense you can't prove is money the CRA won't let you write off. For self-employed contractors in Canada — electricians, plumbers, HVAC techs, landscapers — expense tracking isn't paperwork. It's profit.

This guide covers everything you need to know about tracking business expenses in Canada: what's deductible, how to organize it, HST/GST rules, and how to avoid CRA audit triggers.

What Counts as a Business Expense?

The CRA allows you to deduct any reasonable expense incurred to earn business income. For contractors, that typically includes:

Direct Job Costs

• Materials and supplies — lumber, wire, fittings, parts
• Subcontractor payments — when you hire help for a job
• Equipment rentals — scissor lifts, excavators, specialty tools
• Permits and inspections — ESA fees, building permits

Vehicle Expenses

• Fuel — for business mileage only
• Insurance — prorated if you use the vehicle personally too
• Maintenance and repairs — oil changes, brakes, tires
• Lease or financing costs — if the vehicle is for business

⚠️ Important: You can't claim 100% of vehicle costs unless it's a dedicated work truck. If you drive it to the cottage on weekends, you need to prorate based on business mileage vs. total mileage.

Tools and Equipment

• Small tools under $500 — fully deductible in the year you buy them
• Large equipment over $500 — depreciated over time (CCA rules)
• Tool repairs and sharpening — fully deductible

Business Operations

• Phone and internet — business portion only
• Insurance — liability, commercial auto, equipment
• Advertising and marketing — website, Google Ads, truck wraps
• Office supplies — invoices, safety vests, first aid kits
• Professional fees — accountant, lawyer, consultant
• Bank fees and interest — business credit card fees, line of credit interest

Home Office (If Applicable)

If you have a dedicated office space at home, you can deduct a portion of:

• Mortgage interest or rent
• Property taxes
• Utilities (heat, hydro, water)
• Home insurance
• Maintenance costs

Key rule: The space must be used regularly and exclusively for business. Your kitchen table doesn't count unless you have a permanent workspace setup.

What's NOT Deductible

• Personal groceries — even if you bought them on the way to a job
• Clothing — unless it's branded workwear or safety gear
• Fines and penalties — speeding tickets, parking tickets
• Personal phone use — if you claim 100% of your cell bill but use it for personal calls, that's a problem
• Meals with no business purpose — lunch with your wife isn't deductible; lunch with a supplier is (50% deductible)

HST/GST on Business Expenses

If you're registered for HST/GST (required if you earn over $30,000/year), you can claim Input Tax Credits (ITCs) on the HST/GST you paid on business expenses.

How It Works

• You charge clients HST/GST on invoices (e.g., 13% in Ontario)
• You pay HST/GST on business purchases (materials, fuel, tools)
• You remit the difference to CRA

Example: You collect $5,000 HST from clients this quarter. You paid $3,000 HST on materials and expenses. You remit $2,000 to CRA.

How to Track Expenses (Systems That Actually Work)

1. Separate Business and Personal

Open a business bank account. Don't mix personal and business money. The CRA hates it, and you'll hate yourself at tax time.

Use a business credit card for all business expenses. Easier to track, automatic statements, and some cards offer cash back or points.

2. Save Every Receipt

Paper receipts fade. Coffee spills on them. They get lost in the truck. You need a system:

• Take a photo immediately — phone camera or receipt scanning app
• Store digitally — cloud folder (Google Drive, Dropbox) or expense tracking app
• Label clearly — job name, supplier, date, HST amount

3. Track Mileage Religiously

Vehicle expenses are one of the biggest deductions for contractors, but the CRA audits them heavily. You need a mileage log:

• Date
• Starting odometer reading
• Ending odometer reading
• Total km driven
• Purpose of trip (job site address or "supply pickup")

Apps like MileIQ or Everlance automate this with GPS tracking. Set it and forget it.

4. Reconcile Weekly

Don't wait until tax season. Spend 10 minutes every Sunday matching receipts to credit card statements. Missing receipts? Flag them now while you still remember what they were for.

5. Use Software (Or Get Help)

Manual spreadsheets work, but software is faster:

• QuickBooks Self-Employed — tracks expenses, mileage, and estimates quarterly tax
• Wave — free accounting software, good for small contractors
• FreshBooks — invoicing + expense tracking in one

Or outsource it. A bookkeeper costs $100–$300/month and saves you hours every week.

Common Mistakes (And How to Avoid Them)

1. Forgetting to Track Small Expenses

$8 at Home Depot. $12 at Timmies for the crew. $25 at the gas station. Small expenses add up to thousands over a year. Track everything.

2. Not Separating HST

When you enter an expense, record the pre-tax amount and the HST separately. You need both numbers for your HST return.

3. Claiming 100% of Mixed-Use Expenses

Your phone. Your truck. Your internet. If you use them personally too, you can't claim 100%. Estimate a reasonable business percentage (e.g., 70% business, 30% personal) and stick to it.

4. Losing Receipts for Cash Purchases

Paid cash at a lumber yard? Got a handwritten receipt from a subcontractor? Take a photo immediately. Cash transactions are audit magnets.

5. Not Documenting Business Meals

CRA allows 50% of meal costs when meeting clients or suppliers, but you need to document:

• Who you met with
• Why (purpose of the meeting)
• Date and location

Write it on the receipt before you forget.

CRA Audit Triggers (What to Avoid)

CRA auditors look for patterns. Red flags include:

• Round numbers — "Fuel: $500/month" every month looks made up. Real expenses are messy.
• High vehicle claims — If you claim 90% business use on a personal vehicle, expect questions.
• No supporting documents — "I swear I spent $10K on tools" won't fly without receipts.
• Large cash expenses — $5,000 cash payment to a sub with no invoice? CRA will ask for proof.

How Much Can You Save?

Let's say you're a self-employed electrician in Ontario earning $80,000/year. Your combined federal + provincial tax rate is around 30%. If you track $20,000 in business expenses properly:

Tax savings: $20,000 × 30% = $6,000

That's $6,000 back in your pocket just for doing the paperwork right.

Plus HST refunds. If you paid $2,600 HST on those $20K in expenses (13% in Ontario), you get that back too via Input Tax Credits.

Total savings: $6,000 (tax) + $2,600 (HST) = $8,600

That's worth tracking your receipts.

Final Checklist: Are You Tracking Everything?

• ✅ Receipts saved digitally (photos, cloud storage)
• ✅ Mileage log (app or manual, updated weekly)
• ✅ Business bank account (no personal transactions)
• ✅ Business credit card (automatic statements)
• ✅ HST tracked separately (for ITCs)
• ✅ Weekly reconciliation (10 minutes every Sunday)
• ✅ Software or bookkeeper (don't do this alone)

You didn't get into contracting to do paperwork. But the contractors who track expenses properly keep more of what they earn — and sleep better during tax season.

Track it. Claim it. Keep it.