Equifax Canada and TransUnion Canada will hand you a three-digit number the moment you ask for one, and neither company will ever tell you the exact math behind it. That’s not an oversight or a customer service gap. The formula is proprietary by design, treated the same way a soft drink company treats its recipe, and the closest either bureau will get to explaining it is a list of the ingredients without the measurements.
Your credit score in Canada is calculated from five categories of information in your credit report, payment history, credit utilization, length of credit history, credit mix, and recent credit inquiries, run through a proprietary formula that Equifax Canada and TransUnion Canada each keep confidential. The exact weighting of each category isn’t published, changes over time, and differs between the two bureaus, which is a big part of why your Equifax score and your TransUnion score are rarely identical.
The Formula Nobody Gets to See
According to the Government of Canada’s own consumer education material, the actual formulas used to calculate a credit score aren’t available to the public, even though the main factors that feed into them are well documented. That’s a strange thing to sit with when a number this consequential decides your mortgage rate, and it’s worth being upfront about instead of pretending anyone outside the bureaus themselves has the full picture.
What is public is the raw material. Every account you’ve ever opened, every payment you’ve made or missed, every credit application you’ve filed, and every collection or bankruptcy on record all feed into the calculation. What’s proprietary is how those inputs get weighted and combined into a single number between 300 and 900. Both bureaus adjust their formulas periodically to stay competitive with each other, which means the exact math behind your score today isn’t necessarily the same math that produced last year’s number, even if nothing in your own financial life changed.
Two Bureaus, Two Different Engines
Equifax Canada’s score runs primarily on a model called Beacon, which is Equifax’s branded version of a FICO scoring model licensed from the Fair Isaac Corporation, the American analytics company that pioneered credit scoring. TransUnion Canada builds its own scores using its own proprietary algorithms, sometimes drawing on models it markets under names like CreditVision, layered with additional analysis that isn’t tied to the FICO methodology at all.
That difference in underlying engine, not just a difference in the data each bureau happens to hold, is a real part of why a person’s Equifax score and TransUnion score can sit dozens of points apart at the exact same moment. It isn’t only about which lenders reported to which bureau. It’s two separate companies running two separate proprietary calculations on overlapping but not identical data sets, then landing on two different answers to the same underlying question, which is how likely you are to repay what you owe.
What the Five Categories Actually Measure
The five categories get discussed constantly in general terms, so here’s what the bureaus are actually pulling out of your file for each one, at a level of specificity most explainers skip past.
Payment history isn’t a simple yes or no on whether you paid. It’s built from the exact status codes lenders report each month, current, 30 days past due, 60, 90, and so on up through a written-off or collections status, and how many of your total accounts carry a delinquent status right now relative to how many you have open. A single account 90 days late carries more weight than the same account 30 days late, and the ratio of delinquent accounts to total accounts matters as much as any individual late payment.
Credit utilization is measured off the balance your lender reports as of your statement date, not your balance today and not your balance on the due date. This is the detail that trips up people who assume paying in full every month automatically keeps their utilization low. If a card reports a $2,000 balance on a $5,000 limit the day the statement cuts, that 40% figure is what gets pulled into the calculation, even if the balance is paid to zero a week later.
Length of credit history draws on two separate numbers, the age of your single oldest account and the average age across every account you currently hold. Both get factored in, which is why opening several new accounts at once can drag your average down even if your oldest account hasn’t changed at all.
Credit mix looks at the balance between revolving credit, meaning credit cards and lines of credit, and installment credit, meaning car loans, student loans, and mortgages. It’s counting account types, not judging whether you needed each one.
New credit inquiries count both the raw number of hard inquiries on your file and how recently they landed, with inquiries from the last few months carrying more weight than ones from a couple of years back, even though both remain visible on your report for longer than that.
What Never Enters the Calculation at All
Just as important as what’s measured is what isn’t, and the list surprises a lot of people. According to TELUS’s own consumer education content, your credit score doesn’t factor in your income, your employment history, or your bank account balances at all, since the calculation is built entirely from credit-related data rather than a broader financial snapshot. FICO’s own Canadian consumer information goes further and confirms your score also excludes your gender, race, nationality, and marital status, since these factors have no place in a formula designed to predict repayment risk rather than describe who you are.
Your postal code, the province you live in, your job title, and how much you have sitting in savings or chequing are all invisible to the calculation too. So is your debit card activity, since debit transactions never touch a credit file in the first place. If you’ve ever wondered whether taking a pay cut or switching to a lower-paying job could quietly tank your score, it can’t, not directly. The only way employment changes touch your score is indirectly, through missed payments if your income actually falls short of your obligations.
The Rent Exception That’s Changing in Real Time
For most of the history of Canadian credit scoring, rent was invisible too, which always struck me as backwards given it’s usually the single largest recurring payment a renter makes every month. That’s shifted, and it’s shifted unevenly enough that it’s worth understanding exactly where things stand right now rather than repeating outdated advice.
Equifax Canada has accepted rent payment data through third-party reporting services for years, treating verified rent payments as a tradeline that behaves similarly to a loan on your file. TransUnion held out on this for a long time, but that changed in January 2026, when TransUnion Canada announced partnerships with FrontLobby and Zenbase to begin incorporating rental payment information into its credit reporting system. TransUnion treats the data as a separate informational category rather than a debt-style tradeline, which is a real structural difference from how Equifax handles the same underlying payments.
None of this happens automatically. A landlord has to actively use one of these reporting services and enrol your tenancy for your rent to show up anywhere on either bureau’s file, so paying rent on time for years with a landlord who isn’t using one of these platforms still contributes nothing to your score. If you’re renting somewhere in one of Winnipeg’s more affordable neighbourhoods and building credit from scratch, asking your landlord directly whether they report is a question most renters never think to ask, and worth asking before you find out the hard way that years of on-time payments never showed up anywhere.
Why You Don’t Actually Have Just One Score
Here’s the part that catches even financially careful people off guard. The number you see when you check your own file through Borrowell, Credit Karma, or directly through a bureau isn’t necessarily the same number a lender pulls when you apply for something. Equifax Canada itself confirms that each bureau maintains multiple scoring algorithms built for different purposes, a version tuned for mortgage lending, a version tuned for credit card risk, a version meant for general consumer education, and a lender typically requests only one specific version depending on what you’re applying for.
This is why a mortgage broker can occasionally quote you a number that doesn’t match what you saw on your phone that morning, and it isn’t an error on either end. Both numbers are legitimate outputs of the same underlying data, run through two different purpose-built versions of the formula. If you’re deep into comparing rates at a Winnipeg credit union versus a big bank, it’s worth asking which score version they pull rather than assuming the number on your monitoring app is the one that’ll show up in their system.
Where to Take This
Pull your reports from both bureaus rather than trusting one number to represent the whole picture, since the underlying formulas actually diverge and a single bureau’s file can hide an error the other one would catch. If public record items are dragging your file down, understanding whether you’re dealing with a collection account or something more serious like a bankruptcy filing changes both the timeline and the strategy for recovery, so it’s worth knowing exactly what’s showing before assuming the fix is the same for both. And if you’re building a file from close to nothing, a secured card still feeds the same five categories as any other credit product, so there’s no separate, easier calculation waiting for beginners. It’s the same formula either way, just with less history behind it.
This post reflects my own research and shouldn’t be taken as personalized financial advice. See my full disclaimer for more.
A Handful of Follow-Up Questions
Can two people with identical financial habits end up with different scores? Yes, easily. Different lenders reporting to different bureaus, different scoring model versions, and even small timing differences in when data gets reported can produce different numbers for people whose actual credit behaviour looks nearly identical.
Does my score reset or change if I move to a different province? No. Your credit file follows you as a person, not a location, and moving provinces doesn’t reset or recalculate anything on its own. Certain provincial rules affect how long specific negative items stay visible, but the underlying score calculation itself doesn’t change based on where you live.
If the formula is secret, how does anyone know the five categories are accurate? Both bureaus, along with FICO, have publicly confirmed the five general categories even while keeping the exact weighting and internal math confidential. It’s a partial disclosure rather than a full one, similar to a company confirming the main ingredients in a product without publishing the recipe.
