Why Your Credit Score Differs by App: Equifax vs. TransUnion

You check your credit score on your bank's app. It says 741. A week later, you check a free app. It says 758. Your mortgage broker pulls a third number entirely.

None of these are wrong. They're just different.

Canada doesn't have one credit score — it has at least two official ones, plus a handful of custom versions individual lenders build on top of them. Once you understand why, the "which number is my real score" question stops being confusing and starts being useful.

Why it matters

Not knowing why your scores differ leads to two costly mistakes: panicking over a number that dropped on one app but not another, or shopping for a mortgage using a score that isn't the one your lender will actually see. Understanding the system means you can stop chasing a single "true" number and start focusing on the habits that move all of your scores in the same direction.

The two bureaus behind every Canadian credit score

In Canada, credit scores are calculated by two credit bureaus: Equifax Canada and TransUnion Canada. Both use a 300–900 scale, and both build their scores from your credit report — but they're separate companies, with separate data and separate proprietary formulas.

A few reasons your Equifax and TransUnion numbers won't match:

• Not every lender reports to both bureaus. Some creditors report only to Equifax, some only to TransUnion, and some to neither. If a landlord, phone company, or smaller lender only reports to one bureau, that account only affects one of your two scores.
• The bureaus don't disclose their exact formulas. The Financial Consumer Agency of Canada (FCAC) confirms that credit bureaus and lenders "use different formulas to calculate your score, but they don't share the exact details."
• Timing differs. Bureaus typically update your file monthly, but not always on the same day, so one score can reflect a recent payment before the other does.

What FCAC does confirm is which factors generally matter, even without the exact math behind them:

• Your credit history — how long you've had credit, how long each account has been open, whether debts went to collections, and whether you've filed for insolvency or bankruptcy.
• Your credit habits — whether you carry a balance, miss payments, run close to your limit, or apply for new credit often.

Where FICO fits in — and why it confuses people

You've probably also seen "FICO Score" mentioned online, often alongside a claimed weighting like "35% payment history, 30% utilization, 15% length of history, 10% new credit, 10% credit mix."

That breakdown is real — but it's the Fair Isaac Corporation's (FICO's) own published U.S. model, built around the American 300–850 scale. It isn't a confirmed description of how Equifax Canada or TransUnion Canada calculate their 300–900 scores. FCAC is explicit that Canadian bureau formulas aren't public, so any site presenting exact Canadian percentage weightings — FICO's or otherwise — is presenting an estimate, not a disclosed fact. FICO scoring models are also used by some Canadian lenders behind the scenes, which is part of why the "which score is real" confusion runs so deep.

Why the tier labels don't line up either

Beyond the number itself, the label attached to it can differ. Equifax Canada publishes its own general tier guide directly to consumers:

TransUnion Canada does not publish an equivalent consumer-facing tier chart on its own Canadian site — one of its own pages is literally titled "Why the answer to 'what's a good credit score?' varies," and states plainly that each lender decides which range it considers good or poor. The TransUnion tier numbers that circulate widely online (roughly 693–742 = "Fair," 743–789 = "Good," 790–832 = "Very Good," 833+ = "Excellent") trace back to a bank's interpretation of TransUnion's model, repeated across comparison sites — not to a page TransUnion Canada itself publishes for consumers. Treat those specific cutoffs as commonly cited rather than officially confirmed.

This is a genuinely useful thing to know: even people doing their own research online often end up quoting numbers that were never published by the bureau they're citing.

A practical example: Priya's Equifax-based app shows 768 ("Excellent" on Equifax's own scale). Her TransUnion-based app shows 745. Depending on which loosely sourced TransUnion chart you compare that to, 745 could read as "Fair," "Good," or something else entirely. Priya hasn't done anything wrong — she's just looking at two different measurement systems that were never designed to match up point-for-point.

Common mistakes

• Assuming one app's score is "the" score a lender will use. Many lenders build their own custom score on top of Equifax or TransUnion data, weighted for their own risk criteria. The number your lender sees may not match either consumer app.
• Panicking over a drop that only shows on one bureau. If your utilization jumped on a card that only reports to one bureau, only that score will move. Check both before assuming something's wrong.
• Believing that checking your own score hurts it. This is false. FCAC confirms that "checking your own credit report or score doesn't affect your credit score." Looking up your own information is a soft inquiry, visible only to you. Hard inquiries — the kind that come from applying for credit — are the ones that can affect your score, and even those are typically grouped together if you rate-shop for a mortgage or car loan within a short window.
• Believing carrying a balance builds credit faster than paying in full. It doesn't. What matters is your credit utilization rate — how much of your available credit you're using — not how much interest you pay. FCAC recommends staying under 30% utilization, and paying your statement in full each month builds credit exactly as well as carrying a balance, without the interest charges.
• Closing an old credit card to "clean up" your file. FCAC's own guidance warns that closing an older account "may hurt your credit score" by shortening your credit history and reducing your available credit — especially if it was one of your oldest accounts. An unused card with no annual fee is often better left open.

The short version

If you remember nothing else from this article: you don't have one credit score — you have several, from different bureaus and different models, and that's normal. The habits that improve one — paying on time, keeping utilization low, avoiding unnecessary new credit applications, and keeping old accounts open — improve all of them together. Chasing a single "correct" number is less useful than building the habits that move every version of your score in the same direction.

Sources

• Financial Consumer Agency of Canada, "Credit report and score basics"
• Financial Consumer Agency of Canada, "Improving your credit score"
• Equifax Canada, "What Is a Good Credit Score in Canada?"
• TransUnion Canada, "Why the answer to 'what's a good credit score?' varies"

This article is for general educational purposes only and does not constitute personalized financial advice. Credit scoring formulas are proprietary to each credit bureau and are not fully disclosed to the public. Speak with a financial professional, or contact Equifax Canada or TransUnion Canada directly, for information specific to your situation.

What to do next

Checking both your Equifax-based and TransUnion-based scores — rather than treating one app's number as the definitive answer — is the simplest way to see the fuller picture. For how different types of debt affect your overall financial picture, see Understanding the Different Types of Debt in Canada. For newcomers building credit from scratch, see Building Credit in Canada.