A line of credit and a car loan are both common ways to finance a vehicle in Canada, but they differ in cost, security, and flexibility. In practice, a car loan is often cheaper because it is secured by the vehicle, while a line of credit may be more convenient but can carry a higher interest rate.
When you need to buy a car in Canada, two common financing options are a car loan and a line of credit. A car loan is a fixed-term installment loan secured by the vehicle, while a line of credit is a revolving account you can draw from as needed. The cheaper option in practice usually depends on whether the line of credit is secured, your credit profile, and how long you take to repay.
| Feature | Car loan | Line of credit |
|---|---|---|
| Security | Vehicle is collateral | Unsecured or secured by other assets (e.g., home) |
| Typical rate | Lower because secured | Higher if unsecured; lower if secured |
| Repayment | Fixed term, fixed payments | Revolving, minimum payment often interest-only |
| Prepayment | May have penalties | Usually flexible |
| Impact on credit | Installment account | Revolving account; utilization matters |
As the Financial Consumer Agency of Canada explains, loans come in many forms, and the cost depends on the interest rate, fees, and terms you agree to. You can review general loan information from the Financial Consumer Agency of Canada.
How a car loan works
A car loan is a closed-end loan. You borrow a specific amount, agree to a fixed or variable interest rate, and repay over a set term—often 24 to 96 months. The vehicle serves as collateral, so the lender can repossess it if you default. Because the loan is secured, interest rates are typically lower than unsecured credit. The lender may register a lien on the vehicle, which stays until the loan is paid off. Car loans are offered by banks, credit unions, dealerships, and online lenders. Rates vary by lender, province, your credit history, and the vehicle's age and condition. A co-signer can help you qualify or get a better rate, but it means they share responsibility. The FCAC has information on disclosure of information to joint borrowers that is relevant if you use a co-signer.
How a line of credit works
A line of credit is a revolving account. You have a limit, and you can borrow, repay, and borrow again. There are two main types: unsecured lines of credit and secured lines of credit, such as a home equity line of credit (HELOC). Unsecured lines of credit usually have higher interest rates because the lender has no collateral. Secured lines of credit use your home or other assets as security, so rates can be lower—often closer to mortgage rates. Interest is usually calculated daily on the outstanding balance. You can pay just the interest, a minimum payment, or more. That flexibility is convenient, but it can also stretch out repayment and increase total interest. If you use a line of credit to buy a car, the car is not usually used as collateral unless the line is specifically secured by it. The lender may not register a lien on the vehicle, so the car is not directly at risk of repossession for that debt—though default can still affect your credit and, for a HELOC, your home.
Cost comparison: which is cheaper in practice
In practice, a car loan is often cheaper than an unsecured line of credit. Why? Because the car loan is secured by the vehicle, the lender takes less risk, so the interest rate is usually lower. An unsecured line of credit is riskier for the lender, so the rate is typically higher. However, a secured line of credit—especially a HELOC—can have a lower rate than a car loan. That makes the comparison more nuanced. If you have a HELOC, using it to buy a car might cost less in interest than a car loan, but you are putting your home at risk. If you have excellent credit and a low-rate unsecured line of credit, it might be competitive with a car loan, but rates vary. The FCAC notes that credit scores affect the rates you are offered; you can learn more from the Financial Consumer Agency of Canada.
Consider a simple example. Suppose you borrow $25,000 for a car. A five-year car loan at 7% has a monthly payment of about $495 and total interest of about $4,700. An unsecured line of credit at 10% with the same five-year repayment plan costs about $531 per month and $6,860 in interest. If you only pay interest for a few years, the line of credit costs more in total. But if you use a HELOC at 5.5% and repay over five years, the payment is about $477 and interest about $3,600—less than the car loan. The catch is that the HELOC is secured by your home. These numbers are illustrative; actual rates vary by lender and province. Use a loan payment calculator to run your own numbers.
Security, risk, and default consequences
With a car loan, the vehicle is collateral. If you default, the lender can repossess the car. With an unsecured line of credit, the lender cannot automatically take the car, but they can sue you, garnish wages, or send the debt to collections. With a secured line of credit like a HELOC, the lender can pursue your home. So the security you provide is a key trade-off. A car loan limits the lender's claim to the car; a HELOC puts your home on the line. An unsecured line of credit may seem safer for your assets, but the higher interest rate can make it more expensive. Also, if you co-sign a car loan, you are equally responsible. The FCAC's joint borrower disclosure page explains that lenders must give certain information to co-signers.
Flexibility, credit impact, and tax considerations
Lines of credit offer more flexibility. You can draw only what you need, repay early without penalty (usually), and reuse the funds. Car loans are fixed: you get a lump sum, and prepayment penalties may apply, though many Canadian lenders allow extra payments. A line of credit can be useful if you are buying from a private seller and need quick funds, or if you want to avoid dealership financing. But the minimum payment on a line of credit is often just interest, so it is easy to stay in debt. A car loan forces you to repay principal with each payment, so you build equity in the vehicle. If you lack discipline, a car loan may be the cheaper long-term choice.
Both options involve a credit check. A car loan adds an installment account to your credit report; a line of credit adds a revolving account. Payment history on both affects your credit score. A car loan may be easier to qualify for if you have a co-signer or a steady income. A line of credit may require stronger credit, especially unsecured. If you have bad credit, you might face higher rates or need a co-signer. You can read about bad credit loans and co-signing a loan for more context. Remember that using a large portion of a line of credit can raise your credit utilization, which may lower your score.
Generally, interest on a car loan or line of credit used for personal vehicle purchase is not tax-deductible in Canada. If you use the vehicle for business, a portion of interest may be deductible—consult a tax professional. Insurance requirements differ: with a car loan, the lender usually requires comprehensive and collision coverage. With a line of credit, the lender may not require specific insurance, but you still need valid auto insurance by law in your province.
Common mistakes to avoid
- Comparing only the interest rate and ignoring fees, terms, and prepayment penalties.
- Using a HELOC for a car without understanding that your home secures the debt.
- Taking a long term on a car loan and owing more than the car is worth.
- Making only minimum payments on a line of credit and never clearing the principal.
- Co-signing without reading the joint borrower disclosure and understanding the risk.
- Assuming the dealership's financing is always the best or worst deal—shop around.
In short, a car loan is often cheaper than an unsecured line of credit because it is secured by the vehicle. A secured line of credit can be cheaper still, but it puts your home at risk. The right choice depends on your credit, your assets, and your ability to repay. Run the numbers, read the terms, and consider how much security you are willing to provide.