You keep hearing you should “build credit.” Parents say it. Reddit says it. Your bank’s app has a banner about it. But nobody explains how the score actually works. A credit score is not a grade you earn by spending more. It’s a formula that rewards a few boring habits, and it penalizes the one thing most people think helps: carrying a balance.
Summer is the cheapest time to start. You’ve got a first job (Issue 10 covered that paystub), maybe a first apartment, and card offers showing up in your inbox. Most students either ignore credit until it costs them or do the thing they heard helps and end up paying interest for no reason.
A credit score rewards boring. The earlier you start being boring, the further ahead you are.
What your credit score is
Two credit bureaus operate in Canada: Equifax and TransUnion. They each maintain a file on you and generate a score. Scores range from 300 to 900. The average Canadian score is about 679, according to Borrowell data from their 4M+ members. Above 660 is considered “good.” Above 760 is excellent.
Five factors determine that number:
| Factor | Weight | What it means |
|---|---|---|
| Payment history | ~35% | Did you pay on time? The single biggest factor. |
| Credit utilization | ~30% | How much of your available credit you’re using. Keep it under 30%. |
| Length of credit history | ~15% | How long your accounts have been open. Starting early helps. |
| Credit mix | ~10% | Different types of credit (card, loan, phone plan). |
| New inquiries | ~10% | How many times you’ve applied recently. |
Payment history and utilization together account for about two-thirds of your score. Pay on time, keep your balance low, and the rest mostly takes care of itself. We covered the basics of credit scores back in Issue 1, and our guide to building credit from scratch goes deeper on each factor.
“Thin file” vs. “bad credit.” If you’ve never had a credit product, you don’t have a score at all. Lenders call this a “thin file.” That’s different from bad credit, which means you borrowed and mishandled it. A thin file is not a penalty. It’s a blank page. The point of this summer is to start filling it in.
How long does it take? After 3 to 6 months of using a credit product and making on-time payments, your first score appears. Most experts suggest at least 12 months of history before you have a score that’s useful for things like rental applications or a car loan.
How a credit card works
A credit card is a short-term loan that resets every month. Understanding the cycle matters because the interest calculation catches people who don’t know how it works.
The statement cycle. Your card has a billing period (about 30 days). At the end, the issuer generates a statement showing your total balance and a due date. Under the Bank Act (s.627.34), federally regulated issuers must give you at least 21 days between that statement date and the payment due date. That 21-day window is your grace period.
The grace period rule. Pay your full statement balance by the due date and you pay zero interest on purchases. The grace period is mandatory for new purchases on federally regulated cards. This has been the law since January 1, 2010.
The grace period and carried balances. You may have heard that carrying even $1 forward means you lose the grace period on everything new you buy. For federally regulated Canadian issuers, that’s not how it works. Under s.627.34(4) of the Bank Act, new purchases still get the mandatory 21-day grace period even when you’re carrying a balance, as long as you pay the new balance in full by the due date. Interest accrues on the carried-over balance itself, not on new purchases. Cash advances and balance transfers are the exception: they have no grace period and start accruing interest immediately.
The minimum payment. If you can’t pay in full, the issuer requires a minimum payment. At the Big Five banks, this is typically $10 plus any interest and fees. Paying the minimum keeps your account in good standing (protects your payment history), but the remaining balance accrues interest.
Worked example: pay in full vs. carry a balance
Say you have a student credit card with a $1,500 limit and an APR of 20.99% (a typical student card rate; some charge up to 21.99%, and a few low-rate cards start at 13.99%). You spend $400 in June.
Scenario A: pay in full. Your statement arrives showing a $400 balance. You pay $400 before the due date. Interest charged: $0. Done. Your payment history gets a green checkmark. Your utilization was about 27% ($400 / $1,500), which is under the 30% threshold. Score-building on track.
Scenario B: pay the minimum. Your statement arrives showing $400. You pay $10 (the minimum). The remaining $390 carries forward and starts accruing interest at 20.99% APR. That’s roughly 0.0575% per day. Over 30 days, the interest on $390 is about $6.73. Next month you owe $396.73 before you buy anything new.
Meanwhile, you spend another $300 in July. Your July statement shows the $396.73 carried balance (still accruing interest) plus $300 in new purchases. You now owe $696.73. Pay the minimum again and you’re in a hole that grows every month.
The lesson: paying in full costs you nothing and builds your score. Carrying a balance costs you money and does NOT build your score faster. “Carry a small balance to build credit” is one of the most persistent myths in student finance. It’s wrong. Your payment history records whether you paid on time, not whether you paid interest.
This example is for illustration. Your card’s rate, billing cycle, and minimum payment formula will vary by issuer.
Our first credit card guide covers the mechanics of statements, grace periods, and utilization in more detail.
Getting your first card with no history
You’ve got three main options depending on your situation:
| Student card | Secured card | Newcomer card | |
|---|---|---|---|
| Who it’s for | Enrolled in post-secondary | Anyone building or rebuilding credit | Recently arrived in Canada |
| Deposit required | No | Yes (minimum $300 at TD/BMO) | No |
| Typical limit | $500 to $5,000 depending on issuer and income | Equal to your deposit ($300+) | Varies by issuer |
| Typical APR | 20.99% to 21.99% (some low-rate cards from 13.99%) | Similar range | Varies by issuer |
| Rewards | Often (cash back, points) | Less common | Varies |
| Annual fee | Usually none | Varies | Often waived first year |
Age requirement: you must be the age of majority in your province. That’s 18 in Alberta, Ontario, Manitoba, Saskatchewan, Quebec, and PEI. It’s 19 in BC, New Brunswick, Newfoundland and Labrador, Nova Scotia, Northwest Territories, Nunavut, and Yukon.
Apply at your existing bank first. If you have a chequing account, your bank can see your deposit history. That track record often helps with approval even without a credit score.
Our first credit card guide has a full comparison of popular student cards for 2026, tips on reporting all your income on the application, and what to do if you get declined.
The habits that build your score
The strategy isn’t complicated. It’s consistent.
Pay your full balance every month. This is the single most important habit. It protects your payment history (35% of your score), costs you zero in interest, and disproves the “carry a balance” myth in one move. Set up autopay for the full statement balance so you don’t miss a due date.
Keep utilization under 30%. If your limit is $1,000, try not to carry more than $300 at any point in the billing cycle. Equifax recommends staying below 30%. Some scoring experts suggest even lower is better, but below 30% is the well-supported threshold.
Use the card for small, regular purchases. A streaming subscription, groceries, gas. Things you’d buy anyway. Put them on the card, pay them off. Consistent activity with on-time payments is the formula. A card sitting in a drawer unused doesn’t build much history.
Don’t apply for multiple cards at once. Each application triggers a hard inquiry, which can stay on your Equifax report for up to 3 years and on your TransUnion report for up to 6 years. Soft inquiries (checking your own score) don’t affect it at all. Space applications out by a few months.
If you started your summer job in May and get a card now, you could have your first score by September or October and a solid foundation within 12 months. That’s the whole play: start early, stay boring, let the formula do its thing.
Beyond the card: rent reporting and other trade lines
A credit card is the foundation. But if you’re renting this summer, your rent payments can contribute to your credit file too. Services now exist that report monthly rent to the bureaus, which builds three score factors at once: payment history, credit history length, and credit mix.
- Borrowell Rent Advantage. Reports to Equifax. $10/month or a one-time $99 fee.
- Chexy Credit Builder. Reports to Equifax. Currently free.
- FrontLobby. Reports to both Equifax and TransUnion as of January 2026, but requires your landlord to participate.
A post-paid phone plan (Rogers, Bell, Telus) also reports to the bureaus. Prepaid plans don’t.
Stacking a credit card plus rent reporting creates multiple trade lines reporting at the same time, which can speed up the timeline for a usable score. Our credit-building guide covers additional tools like credit builder programs and how authorized-user status works (spoiler: it’s unreliable in Canada).
Common questions
Can I check my own score without hurting it? Yes. Checking your own score is a soft inquiry and has zero effect. You can check for free through Borrowell (Equifax score), Credit Karma (TransUnion score), or by requesting your report directly from the bureaus. Check every few months to track progress and catch errors.
Does spending more build credit faster? No. Your score tracks whether you paid on time and how much of your limit you used. Spending $50 a month and paying it off builds credit the same way spending $500 does. Spending more increases your utilization, which can hurt your score if it pushes above 30%.
Should I close my student card after I get a better one? No. Length of credit history is 15% of your score. Keep your first card open if it has no annual fee. You can stop using it, but closing it shortens your credit history.
I’m under 18. Can I start building credit? Not with a credit card. You need to be the age of majority in your province to apply. You can still build good habits: open a bank account, start budgeting (Issue 8 covers that), and understand how the system works so you’re ready when you turn 18 or 19.
What if I miss a payment? One missed payment can hurt your score. Set up autopay for at least the minimum payment so this doesn’t happen. If you do miss one, pay it as soon as possible. The longer the delinquency, the more damage it does.
Caveats
Credit building isn’t urgent for everyone right now. If you’re managing debt, focusing on an emergency fund (Issue 11 covered HISAs), or not yet at the age of majority, that comes first. A credit card is a tool, and it works best when you’re in a stable enough position to use it responsibly.
If you’re graduating this summer, Issue 12 covers the financial transition from student to working adult, including employer benefits, RRSP matching, and lifestyle inflation. Credit is one piece of a bigger picture.
And if you’re an international student or newcomer: your credit history from your home country doesn’t transfer to Canada. You start from scratch here. Our credit-building guide has a section on newcomer card options.
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Read: The Wealthy Barber Returns by David Chilton. Canadian personal finance classic. Short chapters, plain language, surprisingly funny.
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