Last reviewed: 13 September 2026

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FICO vs. VantageScore: how the two credit scoring models actually differ

"Your credit score" is not one number — it's whichever of dozens of model versions the lender pulling your file happens to use, from two competing companies that score the same file differently on purpose. Both use the same 300-850 range, which makes the two models look interchangeable. They aren't, and the differences are specific enough to matter the next time you check.

Two companies, not one standard

FICO (Fair Isaac Corporation) has scored consumer credit since 1989 and is the model the large majority of lenders — especially mortgage lenders — have historically relied on. VantageScore is a newer model, jointly developed and owned by the three major credit bureaus (Equifax, Experian, and TransUnion) since 2006, built specifically to compete with FICO's dominance. Both now score on the same familiar 300-850 scale, but a "700" from one model and a "700" from the other aren't measuring your file the same way — they're two different companies' independent judgments about the same underlying data.

Where the scoring math actually diverges

Both models weigh the same broad categories — payment history, amounts owed, length of history, new credit, and credit mix — but not by the same amount. FICO's most widely cited breakdown weighs payment history at 35% and amounts owed at 30%, with length of history, new credit, and credit mix splitting the remaining 35%. VantageScore discloses its own factors differently and weighs payment history even more heavily — its own published methodology puts it at roughly 41% of the model, versus FICO's 35%. Both companies caution that these are population-level averages, not a fixed formula that applies identically to every file.

Two specific, checkable differences matter more in practice than the exact percentages:

• How little history you need to get scored at all. Classic FICO models generally require at least one account open for six months or more, with activity reported within the last six months, before they'll generate a score. VantageScore's more recent versions can score a file with as little as one month of history on a single account reported within the past 24 months — a deliberate design choice meant to score more "thin-file" consumers that classic FICO simply can't.
• How a paid-off collection account is treated. FICO's older, still widely used FICO 8 model continues to count a collection account against your score even after it's been paid in full. VantageScore 4.0 ignores paid collection accounts entirely, regardless of the original balance. For someone who settled an old collection specifically to help their score, this single difference can be worth a meaningful swing in points depending on which model happens to be pulled.

VantageScore 4.0 also uses "trended data" — up to 24 months of how your balances moved over time, not just a single snapshot — which FICO 8 does not use at all. In practice, someone steadily paying down a balance can look better under a trended model than under a snapshot-only one, even if their balance on the day of the pull is identical.

Which one actually gets pulled for a mortgage — a genuinely moving target

For years, the honest answer here was simple: Fannie Mae and Freddie Mac (the government-sponsored enterprises that buy most US mortgages) required lenders to use Classic FICO, full stop. That has changed, in stages, and is still changing:

• On 22 April 2026, the Federal Housing Finance Agency (FHFA) let a limited, initially small group of approved lenders begin using VantageScore 4.0 as an alternative to Classic FICO on loans sold to Fannie Mae or Freddie Mac.
• On 9 September 2026, FHFA and the two enterprises expanded that option to every approved lender, removing the requirement for individual prior approval.
• Using VantageScore 4.0 is optional, not mandatory — a lender may still use Classic FICO instead, and every conventional loan still requires a "tri-merge" credit report pulling data from all three bureaus regardless of which scoring model is applied to it.
• A separate, once-planned "bi-merge" policy — which would have let some loans move forward on a report from only two bureaus instead of three — was paused indefinitely in January 2025 and, as of this writing, has no announced restart date.

What this means if you're checking your own score

A free score from a bank app or credit-monitoring service is very often a VantageScore, while a mortgage lender or auto lender pulling a "hard" inquiry is still more likely, as of this writing, to be looking at a FICO score — though that gap is narrowing for mortgages specifically, per the timeline above. Seeing two different numbers from two different sources checking the same credit file at close to the same time isn't a sign either one is wrong — it can simply mean you were scored by two different companies' two different formulas. If a specific credit decision matters (a mortgage rate lock, a major loan), ask the lender directly which score and which version it actually uses, rather than assuming the number in a free app is the one that will be pulled.