Is Car Loan Interest Tax-Deductible in Canada?

Short answer: for most Canadians, no. If you're financing a car you use to commute to a job, run errands, and drive on weekends, the interest on that loan isn't something CRA lets you write off. But that's not the whole picture, and if you're self-employed, run a business, earn commission income, or use your vehicle for work in a specific, trackable way, the answer changes quite a bit. Here's how it actually breaks down.

The default: personal-use interest isn't deductible

If your vehicle is used purely for personal life, getting to a regular job, school runs, groceries, weekend trips, the interest on your car loan is a personal expense in CRA's eyes, the same as interest on a personal credit card or a loan for a vacation. It doesn't matter how good your rate is or how necessary the vehicle feels for getting to work. Employment income earned as a regular employee doesn't come with a general deduction for the cost of getting yourself there, loan interest included.

Where it changes: business use

The moment a vehicle is used to earn business or self-employment income, the math shifts. If you're self-employed, a contractor, running a small business, or earning commission income and using your own vehicle to do it, CRA allows you to deduct the business-use portion of your vehicle expenses, and loan interest is one of the specific expenses that qualifies alongside fuel, insurance, maintenance, and license fees.

The key phrase there is business-use portion. You can't deduct 100% of your interest just because you occasionally use the car for a work errand. CRA expects you to track the actual split between business kilometres and personal kilometres driven over the year, typically with a logbook or a mileage-tracking app, and apply that percentage to your total vehicle expenses, interest included. Drive 12,000 km in a year and 4,000 of those are genuinely for business, roughly a third of your loan interest for the year becomes a deductible expense, not all of it.

We've written before about the practical side of financing a vehicle for exactly this kind of use in our guides on getting a car loan when you're self-employed and financing for rideshare and gig drivers, both of which touch on how lenders and, separately, CRA think about vehicles that straddle personal and business use.

There's a cap on how much interest you can claim

Even when the business-use portion is legitimate, CRA doesn't let you deduct unlimited interest on a passenger vehicle loan. There's a prescribed daily limit on deductible interest that CRA sets and periodically adjusts, applied per day the loan is outstanding regardless of how much interest actually accrued that day. It's a detail that catches people off guard if they finance a more expensive vehicle expecting the full interest amount to flow through as a deduction. The current limit changes from year to year, so check the figure for the tax year you're filing directly on the CRA site or with your accountant rather than relying on a number that may already be out of date by the time you're reading this.

Employees can sometimes claim it too, with conditions

If you're a regular employee, not self-employed, but your job requires you to use your own vehicle for work beyond a normal commute, sales roles and certain field or delivery positions being common examples, you may be able to claim vehicle expenses, including a portion of loan interest, as employment expenses. This requires your employer to complete and sign a T2200 form confirming you were required to use your own vehicle as a condition of employment, and you'll need to file the corresponding employment expense claim with your return. Without that signed form, this route isn't available, no matter how much driving the job actually involves.

Interest versus CCA: they're not the same claim

Loan interest and capital cost allowance, the depreciation deduction on the vehicle itself, are two separate line items, both subject to their own limits and both requiring the same business-use percentage to be applied. People sometimes assume claiming one covers the other. It doesn't. If you're claiming vehicle expenses for business or employment use, both need to be calculated and claimed on their own terms, and both come with their own prescribed limits on higher-value vehicles.

What actually holds up if CRA asks

The single biggest factor in whether a vehicle interest claim survives review isn't how you use the car, it's whether you can document it. A logbook that tracks business trips, dates, destinations, purpose, and kilometres, kept consistently through the year, is what CRA actually wants to see if your claim gets questioned. An estimate reconstructed at tax time from memory doesn't hold up nearly as well. If vehicle expenses are a meaningful part of your tax return, it's worth treating the logbook as a habit from day one rather than a task you scramble to reconstruct in April.

The bottom line

If your car is purely personal, the interest isn't deductible, full stop. If you're self-employed or earning commission income and genuinely using the vehicle for business, the business-use portion of your loan interest is deductible, subject to CRA's prescribed daily limit and proper mileage records. If you're an employee required to use your own vehicle for work, a signed T2200 can open the same door, within its own rules. None of this is tax advice specific to your situation. CRA's guidance and prescribed limits change, and how they apply depends on your exact circumstances, so a conversation with an accountant or tax professional before you file is worth more than a general rule from an article.

What we can help with directly is the financing side, whether you're a self-employed buyer, a gig or rideshare driver, or running a small business that needs a vehicle. Auto Lending Canada works with applicants across BC, Alberta, and Saskatchewan to structure loans that make sense for how the vehicle actually gets used. Start your application here to see what you qualify for.