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Understanding and Improving Your Canadian Credit Score
A Canadian credit score quietly shapes financial life at every stage of the homeownership journey — from a first mortgage application through every renewal after it. Understanding how it's calculated, why it matters for a mortgage specifically, and what actually moves the needle makes it far less of a mystery.
What Is a Canadian Credit Score?
With a range from 300 to 900, a credit score captures perceived lending risk at a given moment in time — a signal to lenders about what kind of borrower risk someone is likely to be. Scores can shift from month to month, since the companies holding credit and loan accounts report transactions monthly to credit bureaus. That monthly reporting cycle is actually good news: it means a score can improve with the right habits, often faster than expected.
How a Score Is Determined
Payment History (~35%)
The single most heavily weighted factor — a track record of on-time payments. Late payments, collections, judgments, liens, foreclosures, bankruptcies, and wage attachments all fall into this category, with recent, larger events affecting the score more than older or smaller ones.
Current Level of Indebtedness (~30%)
Whether credit is being used responsibly or accounts are overextended. Too many cards, or balances sitting near their limits, can signal difficulty managing future payments.
Length of Credit History (~15%)
The age of the oldest account and the average age across all accounts — a longer history in good standing lowers risk indicators, while new accounts pull the average down.
Pursuit of New Credit (~10%)
Opening several accounts in a short window is a risk signal, though credit scoring models generally distinguish between rate-shopping for a single loan and applying for many new accounts.
Types of Credit Available (~10%)
A healthy mix — a mortgage, a car loan, and a credit card, for example — reflects more positively than debt concentrated entirely in credit cards.
Why It Matters for a Mortgage
A credit score above 750 typically means faster approvals at the best available rates, signaling reliability to lenders. A score below 620, on the other hand, can mean a premium on borrowing rates — or real difficulty qualifying for a mortgage at all. Between those two thresholds, the score meaningfully shapes both approval odds and the interest rate ultimately offered.
Five Ways to Improve a Credit Score
1. Know the Credit History
This is where surprises happen most often. Old accounts that were never properly closed, an unresolved payment dispute, or even someone else's information appearing on a file can all quietly drag a score down. A cancelled phone plan or subscription with a small outstanding balance can end up in collections without ever being noticed — and collections carry real weight with lenders. Checking a credit report doesn't affect the score itself, and doing so at least once a year avoids unwelcome surprises later.
2. Pay Bills on Time
Payment history accounts for roughly 35% of a credit score — the single biggest factor by far. Even one missed payment can leave a lasting mark. Automatic payments for at least the minimum owing is a simple, effective way to stay consistent.
3. Keep Balances Low
It's not just about having credit — it's about how much of it is in use. Balances sitting close to a limit can signal financial strain, even with on-time payments. A general guideline is keeping each card or line of credit below 35% of its limit — one of the fastest-moving levers available when preparing for a mortgage application or renewal.
4. Maintain a Credit History
Closing old accounts in good standing, while well-intentioned, can actually work against a score. A longer history reflects positively — keeping older accounts open with minimal use tends to serve a credit profile better than closing them.
5. Get Help When Needed
Uncertainty about where a score stands, or past credit challenges, are worth addressing directly rather than assuming the worst. A credit score is a snapshot, not a life sentence — the right habits, and the right guidance, can shift it faster than most people expect.
Credit Matters All the Way to Funding Day
A credit score isn't only relevant at the start of the mortgage process — it matters right through to closing. Deals that were fully approved can come to a sudden stop when a lender pulls a final credit check before releasing funds and discovers new debt, like a recently financed vehicle or a new credit application, that wasn't there during underwriting. That new debt changes the picture. For anyone with a mortgage in progress, holding off on major purchases or new credit applications until after closing is one of the simplest ways to protect an already-approved deal.
Understanding what shapes a credit score — and building a few consistent habits around it — pays off well beyond a single mortgage application. It's a financial tool that keeps working in the background, long after the keys change hands.
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