You probably have three or four different credit-score numbers floating around your accounts — Credit Karma, your bank's app, your card issuer's portal — and they rarely agree. The reason is that two different scoring models are computing scores from the same underlying data, and each app shows whichever one its data partner provides.

The short answer

FICO is what ~90% of lenders actually use. VantageScore is what most free apps show. The numbers usually differ by 20–50 points. Both models punish one thing equally: an inactive credit card that gets closed by the bank — your utilization climbs and your average account age eventually erodes.

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FICO — what lenders pull

FICO was introduced by Fair Isaac in 1989 and remains the de facto US standard:

  • ~90% of US lender decisions use a FICO score
  • Multiple versions exist for different verticals (FICO 8/9/10 for general use, FICO 2/4/5 for mortgages, FICO Auto Score for auto, FICO Bankcard Score for credit cards)
  • Most card issuers display a FICO in their app for the cardholder

Factor weights for FICO 8 (the most common):

  • Payment history — 35%
  • Credit utilization — 30%
  • Length of credit history — 15%
  • New credit — 10%
  • Credit mix — 10%

VantageScore — what the free apps show

The three credit bureaus jointly created VantageScore in 2006 to compete with FICO. It dominates the consumer-visible surface:

  • Free credit-monitoring apps (Credit Karma, Credit Sesame, NerdWallet)
  • Bank-issued free score features (Chase Credit Journey)
  • Lender prescreening for pre-qualified mailers
  • Rare in final lending decisions for major loans

VantageScore 4.0 weights:

  • Payment history — 41%
  • Age and type of credit — 20%
  • Credit utilization — 20%
  • Recent credit behavior — 11%
  • Total balances/debt — 6%
  • Available credit — 2%

Different categorisation, similar themes. VantageScore weighs payment history slightly higher, can produce a score with as little as 1 month of history (FICO needs 6), and is more lenient on collections.

Why your scores differ across apps

Three independent variables: which scoring model, which credit bureau's data, and when the data was pulled. The result: 10+ valid "credit scores" can exist simultaneously, all from the same underlying data. 20–50 point differences across apps are normal.

Common configurations:

  • Credit Karma — VantageScore 3.0 from TransUnion and Equifax
  • Chase Credit Journey — VantageScore 3.0 from Experian
  • Discover Credit Scorecard — FICO 8 from Experian
  • Capital One CreditWise — VantageScore 3.0 from TransUnion
  • myFICO.com (paid) — all major FICO versions from all three bureaus
The mistake both models punish: an unused card the bank closes for inactivity. ActiveCred runs a tiny authorized charge on every linked card every month. Both FICO and VantageScore benefit. Plans from $0.99/mo.
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Which score matters when

Credit-card applications. Issuers typically use FICO 8 or FICO Bankcard Score. Capital One uses VantageScore 3.0 in some cases. The issuer pulls fresh at application time.

Mortgages. The "mortgage trifecta" of FICO 2, 4, or 5 — older versions specific to mortgage underwriting. Pulled from all three bureaus, middle score used. Your VantageScore is irrelevant; even FICO 8 is irrelevant. Mortgage-pull scores can be 20+ points off what your card app shows. Pre-mortgage prep window detailed here.

Auto loans. FICO Auto Score — slightly different weighting than FICO 8 (more emphasis on auto-loan history).

Free score-tracking. VantageScore. Useful for tracking trends — if it's going up, your profile is improving — but the absolute number isn't what a lender sees.

How dormant cards hit both models

Inactivity closures are one of the few credit events that punish FICO and VantageScore equally:

  • Lost utilization denominator — both models, weighted ~20–30%. When the bank closes a card, your total available credit drops, and your utilization ratio climbs even if you didn't spend a dime more.
  • Account-age erosion (delayed) — both models, weighted ~15–20%. Closed accounts stay on your report for 10 years; when they finally fall off, your average age recalculates downward.
  • "Closed by credit grantor" mark — visible on both reports, slight negative for both models.

The takeaway: defending against inactivity closures is correct strategy regardless of which model your particular lender uses. Keeping unused cards active is FICO-positive AND VantageScore-positive.

Practical takeaways

Don't optimize for the wrong score. If you're applying for a mortgage in 6 months, the VantageScore your free app shows is misleading. Pull a mortgage-FICO via myFICO.com before applying.

Track trends, not absolute numbers. For routine checking, the absolute number is approximate. Watch the direction.

Address the underlying factors. Both models reward the same fundamentals — on-time payments, low utilization, long account history, limited new credit, diverse credit types. Fixing any of those helps every score.

Bottom line

Two scoring models, both legitimate, used in different contexts. FICO dominates actual lending. VantageScore dominates free apps. The numbers usually differ by 10–50 points.

The directional advice is identical regardless of which one you're optimising for. Both punish inactivity-driven closures the same way, so the dormancy-prevention layer pays off no matter which score you're checking.