A line of credit can affect your credit score in three main ways: credit utilization, hard inquiries when you apply, and how the account is reported to Equifax and TransUnion. Used carefully, it may help your score; missed payments or high balances can hurt it.
A line of credit can affect your credit score in Canada, and the effect depends on how you use it. Three main forces are at work: credit utilization, hard inquiries when you apply, and how the account is reported to Equifax and TransUnion. A line of credit used lightly and paid on time often helps; one that is maxed out or paid late can drag your score down quickly.
The Financial Consumer Agency of Canada explains that credit scores are calculated from information in your credit report, including payment history and how much of your available credit you use. Because a line of credit is usually a revolving account, it can influence both of those factors at once.
| Factor | What happens with a line of credit | Typical score impact |
|---|---|---|
| Credit utilization | Your balance is compared with your limit. Using $4,000 of a $10,000 limit is 40% utilization. | High utilization can lower your score; low utilization (under 30%, ideally under 10%) may help. |
| Hard inquiry | Applying for a new line of credit usually triggers a hard inquiry on your credit report. | A single hard inquiry may cause a small, temporary dip. Multiple applications in a short time can have a larger effect. |
| Payment history | Each on-time payment is reported. Missed or late payments are also reported. | On-time payments build positive history. One missed payment can cause a significant drop. |
| Account age | Keeping an older line of credit open can lengthen your average credit history. | A longer history may help your score; closing an old account can shorten it. |
| Credit mix | A line of credit adds a revolving account to your profile. | A mix of revolving and installment credit can be positive, but only if managed well. |
How a line of credit is reported in Canada
In Canada, most lenders report your line of credit to both Equifax and TransUnion. The account appears as a revolving credit line, similar to a credit card. Your monthly statement balance, credit limit, and payment status are sent to the bureaus. The Financial Consumer Agency of Canada notes that lenders must disclose key terms, but reporting practices can vary slightly by lender. Some lines of credit are unsecured, some are secured (for example, a home equity line of credit). Secured lines may be reported differently, but they still affect your credit score.
If you co-sign a line of credit, the account typically appears on both your credit report and the primary borrower's report. That means your utilization and payment history are tied to how the other person manages the account. The New Brunswick Financial and Consumer Services Commission warns that co-signing is not a favour without risk: you are equally responsible for the debt.
Credit utilization: the biggest lever
Credit utilization is the ratio of your balances to your limits on revolving accounts. If you have a $15,000 line of credit and a $5,000 balance, your utilization on that account is 33%. If you also have a credit card with a $2,000 limit and a $1,000 balance, your total revolving utilization is $6,000 divided by $17,000, or about 35%. Credit scoring models in Canada often treat utilization as a major factor. High utilization suggests you may be over-reliant on credit, which can lower your score.
But a line of credit can also help your utilization if you use it carefully. For example, if you have a credit card that is nearly maxed out, moving some of that balance to a line of credit with a large available limit could lower your overall utilization. That said, you still owe the money, and the line of credit itself will show a balance. The key is to keep total revolving balances low relative to total limits. Many Canadians aim to keep utilization below 30%, and some aim for under 10% for the best scores. There is no magic number published by the FCAC, but lower is generally better.
Hard inquiries vs soft checks
When you apply for a new line of credit, the lender usually performs a hard inquiry. A hard inquiry stays on your credit report for a period and may have a small negative effect on your score. The effect is usually temporary, but several hard inquiries in a short period can be a red flag to lenders. A soft check, such as checking your own credit score or a pre-approval offer, does not affect your score.
If you are shopping for a line of credit, try to keep applications within a short window. Some scoring models treat multiple inquiries for the same type of credit within a 14- to 45-day period as one inquiry, but this is not guaranteed. It is better to research lenders and choose carefully before applying.
Payment history and missed payments
Your payment history is often the single most important factor in your credit score. A line of credit requires at least a minimum payment each month, usually interest plus a small principal portion. If you miss a payment, the lender may report it as 30, 60, or 90 days late. Each missed payment can hurt your score, and the damage grows with the length of the delay. A single 30-day late payment can stay on your report for years.
Setting up automatic payments can help you avoid missed payments. If you are worried about affording the minimum payment, use a loan payment calculator to see how different balances and rates affect your monthly cost. Remember that rates on lines of credit vary by lender and province, and they are often tied to the lender's prime rate.
Co-signing a line of credit
Co-signing a line of credit means you agree to be responsible for the debt if the primary borrower does not pay. The account is usually reported on both credit reports. If the primary borrower uses the line heavily, your credit utilization may rise even if you never spend a dollar. If they miss a payment, your payment history is affected too. Before co-signing, read the guide to co-signing and understand that you may have to pay the full balance. The FCAC also has information on disclosure rules for joint borrowers that can help you understand your rights.
How to manage a line of credit without hurting your score
Managing a line of credit well comes down to a few habits:
- Keep your balance low relative to your limit. Aim to use less than 30% of your available credit, and pay down balances before the statement date if possible.
- Pay at least the minimum on time, every time. Automate payments if you can.
- Avoid applying for multiple lines of credit in a short period. Each application may result in a hard inquiry.
- Keep older accounts open if they have no annual fee, because account age can help your score.
- Review your credit report regularly for errors. You can request a free credit report from Equifax and TransUnion by mail.
If you already have a bad-credit loan or a damaged credit score, a line of credit may be harder to get. Some lenders offer secured lines of credit or credit-builder products. These can help you rebuild credit if you use them responsibly, but they often come with higher rates or fees. Always compare terms and read the fine print.
Common mistakes to avoid
- Maxing out the line of credit. Using 100% of your limit can signal financial stress and lower your score.
- Missing a payment. Even one late payment can undo months of good history.
- Co-signing without a plan. If the primary borrower stops paying, your credit is on the line.
- Closing an old line of credit. This can shorten your credit history and raise your utilization ratio if you still carry balances elsewhere.
- Applying for several lines of credit at once. Multiple hard inquiries can make lenders cautious.
- Assuming a soft check will hurt you. Checking your own score is a soft inquiry and does not affect your score.
In short, a line of credit affects your credit score through utilization, inquiries, and reporting. Used with discipline, it can be a useful tool. Used carelessly, it can cause damage that takes time to repair.