5 Credit Card Mistakes That Hurt Your Credit Score in Canada

What is a credit score, and why does it matter for your finances? Whenever you apply to borrow money—a loan, a line of credit or a new credit card—lenders review your credit rating. Your credit score is a major part of that picture and influences the terms, interest rates and approval decisions lenders make.

What is a credit rating?

A credit rating consists of two main elements—your credit report and your credit score—and each plays a distinct role. Your credit report lists personal details (name, address, birthdate, employment information and recent credit applications) as well as records of the credit you’ve used. That includes account open dates, credit limits, outstanding balances, payment history, late payments and any joint account holders. Debts in collections are shown separately with additional details.

You can—and should—check your credit reports regularly to ensure they are accurate. In Canada, you have access to two major credit reports and reviewing them at least once a year helps you spot errors or identity issues. You can get your credit report for free and review what’s recorded about your accounts.

Your credit report also includes your credit score. A credit score is a numerical indicator lenders use to estimate how likely you are to repay a new loan, based on your past credit behavior. Higher scores indicate lower lending risk and typically result in better borrowing terms. Because the score reflects how you use credit, it responds to changes in your financial habits and obligations.

Avoiding common credit card mistakes will help protect and improve your credit rating. Below are five frequent errors and practical fixes you can apply.

Making your payments late

Late credit card payments are costly. Beyond interest charges, late or missed payments can trigger penalty fees, higher interest rates and damage to your credit history. Over time, unpaid interest compounds and can make your balance grow quickly.

The fix: Treat debt payments as essentials. List all monthly obligations and ensure you can cover required payments—ideally more than the minimum. Set calendar reminders or, better yet, arrange automatic payments through your bank for at least the minimum amount. Scheduling payments yourself gives you control over timing and your bank balance if unexpected expenses arise.

Using too much of your available credit

Keeping your credit utilization low is important. Aim to use no more than 10–30% of each card’s limit on a regular basis. For example, on a $5,000 limit, try to keep balances below $1,500. High utilization signals greater risk to lenders and can lower your score—even if you pay the balance in full each month.

This matters because your monthly income is based on net pay, while credit approvals consider your gross income and total available credit. Too much available credit can limit your borrowing power for large purchases like a mortgage or car loan.

The fix: Rather than requesting higher limits, focus on paying down balances. If you do request increases, only do so if you’re confident you won’t use the extra credit and you’re not planning to apply for other loans soon. The best long-term approach is to reduce debt so you can comfortably keep utilization within recommended levels.

Treating your credit card like an ATM

Cash advances on credit cards typically carry higher interest rates, start accruing interest immediately and often don’t earn rewards. Frequent cash advances can suggest cash-flow problems to lenders and can be an expensive habit.

The fix: Avoid cash advances. If you rely on them regularly to cover essential costs like rent or daycare, review and revise your budget and seek additional support or counselling if needed. Non-profit credit counselling services can provide guidance on budgeting and debt management.

Applying for more credit cards than you need

Every credit application creates an inquiry on your credit report. A few inquiries over time are normal, but repeatedly applying for multiple cards in a short span can hurt your score and tempt you into overspending.

The fix: Apply only for credit you truly need and can manage. Build a realistic household budget that accounts for all monthly, occasional and annual expenses, savings goals and debt obligations so you understand what you can afford before applying for new accounts.

Paying your credit card off too fast

Paying a charge immediately after making it keeps you out of debt, but if you always pay before the billing cycle closes, your account may not show activity to credit scoring systems. That can slow progress when you’re trying to build or rebuild credit.

The fix: Use the card periodically and pay the bill in full by the due date each month. This shows responsible use without incurring interest. Practical approaches include transferring expected payments into a separate account so funds are ready when the bill arrives, or setting up a recurring small charge (such as a subscription) and automating the monthly payment. This creates a predictable charge you can budget for and ensures on-time payments that help build credit.

There’s no quick fix to repair a damaged credit rating overnight. Focus on consistent, controllable actions: make on-time payments, keep balances low, avoid unnecessary applications and manage cash flow responsibly. It’s never too late to adopt a plan that improves your financial health.

Scott Hannah is president and CEO of the non-profit Credit Counselling Society, an organization that has assisted hundreds of thousands of Canadians since 1996.

Read more about building credit in Canada:

• Applying for a credit card: What you need to know
• What does opening or cancelling a credit card do to my credit score?