You probably already know the basics of keeping your credit in good shape: pay your bills on time, don't borrow more than you can repay. But there's another factor quietly shaping your credit score that many Canadians overlook — and it has nothing to do with whether you pay on time.
It's called credit utilization, and it measures how much of your available credit you're actually using at any given moment. Think of it as a snapshot of your borrowing habits. The lower it is, the more favourably lenders and credit bureaus tend to view you.
Credit utilization isn't measured when you make your payment. It's measured when your credit card issuer reports your balance — which usually happens on your statement closing date. That distinction can make a real difference in your credit score, and it's one of the simplest levers to pull once you understand how it works.
What is credit utilization?
Credit utilization is the percentage of your total available revolving credit that you're currently using. "Revolving credit" refers to accounts where you can borrow, repay, and borrow again — like credit cards and lines of credit. It does not include installment loans like car loans or mortgages.
If you have a credit card with a $10,000 limit and your current balance is $2,000, your credit utilization on that card is 20%. The lower the percentage, the less risk you appear to pose to lenders.
Credit utilization is one of the most heavily weighted factors in Canadian credit scoring models. Both Equifax Canada and TransUnion Canada — the two national credit bureaus — consider it when calculating your score.
How credit utilization is calculated
The basic formula is straightforward:
Credit utilization = (total credit balances / total credit limits) x 100
If you owe $3,000 across all your revolving accounts and your combined credit limit is $15,000, your overall credit utilization is 20%.
Per-card utilization vs. overall utilization
Credit bureaus look at utilization in two ways:
Per-card utilization: the balance-to-limit ratio on each individual credit account
Overall utilization: your combined balances divided by your combined limits across all revolving accounts
Both matter. Consider someone with two credit cards:
Card A: $4,500 balance on a $5,000 limit (90% utilization)
Card B: $0 balance on a $10,000 limit (0% utilization)
Your overall utilization is $4,500 / $15,000 = 30% — which looks reasonable. But Card A is at 90%, which could still drag your score down. Credit scoring models may penalize high utilization on individual accounts, regardless of your overall ratio.
The takeaway: spreading balances across accounts can sometimes help lower per-card ratios, though the overall ratio remains the primary factor.
Why credit utilization matters for your credit score
Credit utilization is widely considered one of the most influential components of a credit score. While scoring models vary, many financial experts estimate it accounts for roughly 30% of your overall score — second in weight to payment history.
The reason is simple from a lender's perspective: someone using a large portion of their available credit may be relying heavily on borrowed money, which can signal higher financial risk. Someone using a small fraction of their available credit may appear to be managing their finances more conservatively.
This is true whether you pay your balance in full every month or not. Because utilization is a snapshot — taken at a specific point in time — it captures your balance at that moment, regardless of whether you intend to pay it off the next day.
The 30% rule — and why lower is better
A common guideline in personal finance is to keep your credit utilization below 30%. That means if your total credit limit is $10,000, the general suggestion is to maintain a total balance under $3,000.
But 30% is a threshold, not a target. Data from credit scoring analyses consistently shows that people with the highest credit scores tend to maintain utilization well below 30% — often under 10%. On a $10,000 limit, that means keeping your balance below $1,000.
Utilization ranges are generally assessed as follows:
0% to 10%: often associated with excellent credit scores
10% to 30%: generally considered a healthy range
30% to 50%: may start to have a noticeable negative impact
50% and above: likely to lower your score significantly
One question that comes up often: is 0% utilization ideal? Not necessarily. Some credit scoring models may view a 0% utilization as a sign that you're not actively using credit, which gives the model less information to work with. A small amount of activity — say 1% to 5% — tends to demonstrate responsible use without adding much risk.
How statement closing dates affect your score
This is the part that trips up many Canadians. Credit utilization isn't calculated on your payment due date. It's calculated on your statement closing date — sometimes called the reporting date — which is typically 3 weeks before your payment is due.
Say your credit card has a $10,000 limit and you charge $5,000 in purchases during a billing cycle. If you wait until the due date to pay it off, your statement will have already closed with that $5,000 balance on it. That means your card issuer reports 50% utilization to the credit bureaus — regardless of the fact that you paid in full and owe no interest.
If you had paid down the balance before the statement closing date, the reported balance might have been $500 instead — dropping your utilization to 5%.
Utilization resets with each reporting cycle. Your credit score reflects whatever your utilization was the last time it was reported. A high utilization 2 months ago won't hurt your score today, as long as this month's reported balance is lower.
This means you don't need to carry a zero balance at all times. You need your balance to be low on the day your statement closes. The statement closing date is usually listed on the monthly statement or in the online account. Paying before that date is what determines the balance that gets reported.
How to lower your credit utilization
There are several practical approaches to reducing your credit utilization:
Pay before the statement closing date. As described above, paying down your balance before your statement closes is the most direct way to lower your reported utilization. This doesn't mean paying early is always required — it means that the timing of your payment relative to your statement date determines what gets reported.
Make multiple payments per billing cycle. Instead of one large payment on the due date, some people make smaller payments throughout the month. This keeps the running balance lower at any given point, reducing the chance of a high balance being reported.
Request a credit limit increase. If your credit card issuer raises your limit, your utilization percentage drops automatically — assuming your spending stays the same. A $3,000 balance on a $10,000 limit is 30%, but on a $15,000 limit, it's 20%. This approach reduces utilization only if spending stays the same — a higher limit paired with higher spending leaves the ratio unchanged.
Keep old accounts open. Closing a credit card removes that card's limit from your total available credit, which raises your overall utilization. If an old card has no annual fee, keeping it open — with occasional small purchases — can help preserve your total credit limit.
Spread balances across multiple cards. If you have several credit cards, distributing your spending across them can help lower individual per-card utilization rates, which some scoring models factor in separately from overall utilization.
Common credit utilization mistakes
Understanding how utilization works also means understanding where people often go wrong.
Closing old credit cards. This is one of the most common missteps. When you close a credit card, you lose that card's credit limit. If you had $20,000 in total available credit and close a card with a $5,000 limit, your total drops to $15,000 — and your utilization jumps if your balances stay the same.
Paying only by the due date. Many people assume that paying on time is all that matters. While it's essential for your payment history, it doesn't help your utilization if the statement has already closed with a high balance. Paying on time avoids late fees and interest — but paying before the statement date is what influences your reported utilization.
Ignoring per-card utilization. It's easy to focus on the overall number. But if one card is maxed out while the rest sit empty, your per-card ratio on that account could still hurt your score.
Maxing out a single card for rewards. Some people put all their spending on one card to accumulate rewards points. If that card hits high utilization as a result, the rewards benefit may come at the cost of a lower credit score — at least temporarily, until the statement closes and the balance is reported.
Assuming a small balance helps your score. There's a persistent myth that carrying a small balance from month to month — rather than paying in full — builds credit faster. It doesn't. Carrying a balance means paying interest, and it doesn't improve your utilization ratio compared to paying in full before the statement closes.
Understanding credit utilization is one of those areas of personal finance where a small amount of knowledge can go a long way. The rules are relatively simple — keep your reported balances low relative to your limits — and the timing trick gives you a concrete way to manage it. Once you know when your statement closes, you have the information you need to make that factor work in your favour.