Your credit score is invisible to you most of the time — until you need it. Then it becomes extremely visible and extremely important. The landlord who won't rent to you without a good score. The car loan with a 12% rate because your credit is thin. The mortgage approval that hinges on three years of credit history you don't have yet.
Building credit at 18 is one of the highest-ROI financial moves you can make. Here's how to do it.
In Canada, your credit score is a number between 300 and 900, calculated by Equifax and TransUnion based on your borrowing and repayment history. A score above 660 is considered "good." Above 725 is "very good." Above 760 is excellent and qualifies you for the best rates on loans and mortgages.
At 18, you have no score at all — no file exists. The first time you open a credit account, your file gets created. It takes a few months of activity before you have a scoreable file.
The single most effective way to build credit quickly. Get a card, use it for a few small purchases each month (your phone bill, a grocery run, a streaming subscription), and pay the full balance every month. After 6-12 months of this, you'll have a legitimate credit history forming.
KOHO offers a credit building add-on for a small monthly fee. It works by setting aside a small amount that's reported to Equifax as a loan payment — without you actually taking on debt. It's a useful option if you want to build credit without the risk of a credit card.
If a parent or guardian has good credit and is willing to add you as an authorized user on their credit card, their history on that card can help your file. This is a common strategy. You don't even need to use the card — just being listed helps in some cases.
Rent doesn't automatically appear on your credit report in Canada (unlike the US), but some services now allow rent reporting. Phone bills, utility bills under your name — if these go to collections because you didn't pay, they'll hurt your score. Keep everything current.
Here's what to expect if you open a credit card at 18 and use it responsibly:
Late or missed payments. This is the biggest killer. A single missed payment can drop your score 50-100 points and stays on your report for 6-7 years. Set up autopay.
High credit utilization. Using 80-90% of your credit limit looks bad even if you pay it off every month. Try to keep your balance below 30% of your limit when the statement closes.
Applying for too many credit products at once. Every hard credit inquiry drops your score slightly. Applying for five credit cards in a month looks desperate. Apply for one, wait, build history.
Closing old accounts. Older accounts help your score by increasing your average account age. Don't close your first credit card even if you get a better one — keep it open with a small purchase every few months.
Myth: Carrying a balance helps your score. False. Carrying a balance just means paying interest. Pay in full every month — it actually helps your utilization ratio.
Myth: Debit card use builds credit. False. Debit transactions don't appear on your credit report. Only credit products (cards, loans, lines of credit) build your score.
Myth: You need lots of credit cards to build credit fast. False. One card, used responsibly, is enough. Multiple cards can actually hurt if you're not managing them well.
At 18, credit feels abstract. But the decisions you make now echo for years. The credit history you build between 18-22 will directly affect:
Someone who started building credit at 18 and gets to 28 with a 750+ score can save tens of thousands of dollars over their life in lower interest rates. Start now.
Stop paying bank fees on your income. KOHO is free — no monthly fees, no minimum balance, no credit check. Thousands of young Canadians use it as their main account. Use code 45ET55JSYA for a bonus when you sign up.
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