Imagine you find a place. It is exactly what you want. The rent fits your budget, the location is right, and you have the damage deposit saved.
The landlord runs a credit check.
The score comes back low. You have never borrowed money, never had a credit card, never had anything reported to a credit bureau. There is no history to show. And no history gets treated almost the same as a bad history.
The apartment goes to someone else.
This is not a made-up scenario. It catches a lot of first-time renters by surprise. The fix is simple, but it takes time to put in place. That is why this matters now, even if you are years away from signing a lease.
What a Credit Score Is
A credit score is a number between 300 and 900. The higher, the better. In Canada, it is calculated by two credit bureaus: Equifax and TransUnion. They each run their own calculations independently, so you technically have two scores. They will usually be close.
The score summarizes one thing: how reliably you pay back money you owe. Lenders and landlords use it to decide whether to trust you with a loan or a rental agreement.
The scale breaks down roughly like this:
- 300 to 579: Poor
- 580 to 669: Fair
- 670 to 739: Good
- 740 to 799: Very good
- 800 to 900: Excellent
Most lenders want to see a score above 680 or so. Above 750 and you usually qualify for the best rates.
How the Score Is Calculated
Five factors go into your score. The percentages below are approximate, but they give you the right picture of what actually matters.
Payment history (about 35%). This is the biggest one. Do you pay your bills on time? Even one late payment can pull your score down significantly, especially early on when you do not have much history to cushion it.
Credit utilization (about 30%). This is the percentage of your available credit you are actually using. If your credit card has a $1,000 limit and you are carrying a $900 balance, your utilization is 90%. That is considered high, and it hurts your score. Keeping your balance below 30% of your limit is the standard guideline. Paying the card off completely every month is even better.
Length of credit history (about 15%). How long have you had credit accounts open? A longer track record works in your favour. This is why starting early matters more than most teens realize.
New credit inquiries (about 10%). Every time you apply for a new credit card or loan, the lender does a "hard inquiry" on your file. One or two is fine. Applying for five cards in a month looks risky to the scoring model and pulls your score down.
Credit mix (about 10%). Having different types of credit (a card, a loan, a line of credit) signals that you can handle a variety of borrowing situations. As a teen, you will likely only have one type. That is completely fine. This factor matters more later in life.
What Has No Effect on Your Score
A few things that might seem relevant are actually invisible to the credit bureaus.
Your debit card purchases are not reported. Your savings account balance does not count. Your income is not part of the calculation.
The only thing that builds a credit score is having an actual credit product and using it responsibly over time.
Why Starting Before 20 Gives You a Real Advantage
Here is the part most teens miss.
Because the length of your credit history is part of your score, someone who opens their first credit card the year they turn 18 ends up with a seven-year head start over someone who opens their first card at 25. That is not a small difference. By the time you are 25 and applying for an apartment, a car loan, or eventually a mortgage, your score is already in solid shape. The person starting at 25 is still building from scratch at exactly the moment the stakes get higher.
You can check your credit score for free in Canada through Borrowell or Credit Karma Canada. Checking it yourself is a "soft inquiry," which means it does not hurt your score. It is worth checking once a year.
What Actually Builds Your Score
There is no trick here.
Get a credit card. Use it for small, regular purchases. Pay the full balance before the due date every month. Repeat.
The card is doing its job just by existing and being paid on time. You do not need to carry a balance. You do not need to spend anywhere near your limit. One small purchase a month, paid in full, is enough to build history.
If you are not yet eligible for a standard card, two options work well. You can ask a parent to add you as an authorized user on their credit card. Their payment history on that card may be reported to your file, giving you a head start without you needing to manage the account yourself.
Alternatively, apply for a secured credit card from a Canadian bank. With a secured card, you deposit money upfront (say, $300 to $500) and that amount becomes your credit limit. Because there is no risk to the bank, approval is much easier. Most major Canadian banks and credit unions offer them, typically with no annual fee.
A student credit card is another option once you are in college or university. Banks like TD, RBC, Scotiabank, and BMO all have student cards with no annual fee and low credit limits, designed for exactly this situation. The step-by-step version of all three paths is in how to build credit before you turn 20.
What Hurts Your Score
The most common mistakes:
Paying late. Even a single missed payment can drop your score noticeably. Set up automatic payments for at least the minimum amount due. Better yet, set it to pay the full balance automatically each month.
Maxing out your card. A high balance relative to your limit signals financial stress to the scoring model, even if you always pay it off eventually. Keep your utilization low.
Applying for too many cards at once. Each application triggers a hard inquiry. Space them out. If you need to apply for a new card, do it once, then wait at least a year before considering another.
Closing old accounts unnecessarily. When you close an account, you lose that history. If a card has no annual fee and you are not using it, keep it open. It helps your length of history.
Your Score Is a Kind of Character
One more thing worth saying.
A credit score is a recorded reputation. It tracks whether you do what you say you will do: borrow money and pay it back, on time, in full, consistently.
Building the habit of paying what you owe, when you owe it, is worth more than the score itself. The score is just evidence of the character underneath.
Start building that character now. The score will follow.
Your Next Step
If you do not have a credit card yet, ask a parent this week about becoming an authorized user on their account. Or look up secured credit cards at your bank. Most take about 15 minutes to open.
Search your name on Borrowell or Credit Karma Canada to check your score. If you have never had a credit product, your score may not exist yet. That is completely normal. It just means it is time to start.