Definition · Building Credit

How Credit Scores Are Calculated

By Yinka Olayokun Published Updated 4 min read Reviewed by Yinka Olayokun
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Quick Answer

FICO and VantageScore both compress your credit history into a three-digit number using five weighted factors: payment history (35%), amounts owed (30%), length of credit history (15%), credit mix (10%), and new credit (10%). Two of those factors, payment history and utilization, together drive 65% of the score, which is exactly where to focus.

Key Takeaways

  • FICO weights payment history at 35% and amounts owed at 30%, together 65% of the score.
  • Utilization is calculated on your statement balance, not your post-payment balance.
  • 1–9% utilization appears to be the score-maximizing zone for FICO 8 and 9.
  • Late payments, collections and charge-offs stay on reports for 7 years; Chapter 7 bankruptcy for 10.
  • About 25% of US credit reports contain at least one error, disputing errors is a legitimate fast win.

Key credit Statistics

  • According to myFICO, FICO scores are used in approximately 90% of US lending decisions.

  • According to Experian State of Credit, the average US FICO score reached 717 in 2024, a record high.

  • According to Federal Trade Commission, approximately 25% of US consumers have at least one error on a credit report.

  • According to Consumer Financial Protection Bureau, scores 760+ qualify for the best mortgage rates; the gap between 760 and 850 saves nothing meaningful.

FICO vs VantageScore: what lenders actually use

FICO is used in roughly 90% of US lending decisions; VantageScore is used by Credit Karma, Chase Credit Journey and most free score apps. The two scoring models look at the same underlying data but weight it slightly differently, your FICO and VantageScore can differ by 20–60 points without anything being wrong.

There are also three credit bureaus (Equifax, Experian, TransUnion) and each can hold slightly different data. Lenders commonly pull a mid-score across the three. The takeaway: focus on the underlying behaviors, not on chasing a single score app's number.

The five FICO factors and what each one is worth

  • Payment history (35%), every on-time payment helps; every late payment 30+ days hurts for up to 7 years.
  • Amounts owed / utilization (30%), the balance reported relative to your credit limit, on every revolving account and overall.
  • Length of credit history (15%), average age of accounts, and age of your oldest account. Time is the only fix.
  • Credit mix (10%), having both revolving (cards) and installment (auto, mortgage, student loans) accounts.
  • New credit (10%), hard inquiries from new applications, weighted heaviest in the first 12 months.

How utilization actually works

Utilization is your reported balance divided by your credit limit, on each card and across all cards combined. The single biggest myth: utilization is calculated on your statement balance, not your post-payment balance. So even if you pay in full every month, if your statement closes at 60% utilization, the bureaus see 60%.

Sub-30% utilization is good; sub-10% is excellent; 1–9% appears to be the score-maximizing zone for FICO 8 and 9. Above 30% costs meaningful points; above 90% is severely punitive.

Score ranges and what each tier unlocks

  • 300–579, Poor. Limited to secured cards, subprime auto loans at 18%+ APR.
  • 580–669, Fair. Most basic cards approve; mortgage rates carry a 1–2% premium.
  • 670–739, Good. Median US score; qualifies for most prime cards and loans.
  • 740–799, Very Good. Best mortgage rates, top cashback cards, low auto APRs.
  • 800–850, Exceptional. No measurable benefit above 800, diminishing returns.

The fastest legitimate moves to raise your score

  1. Set autopay for at least the statement minimum on every card. One missed payment can drop a 780 score by 80–100 points.
  2. Pay the statement balance early, before the statement closes, to lower reported utilization.
  3. Request credit-limit increases every 6–12 months on existing cards. Higher limits = lower utilization without spending less.
  4. Become an authorized user on a parent's or partner's oldest card with perfect history (only if their utilization is low).
  5. Dispute genuine errors on your reports at annualcreditreport.com. About 25% of US credit reports contain at least one error.

Things that do not affect your score

  • Income, never appears in the FICO calculation.
  • Checking your own score, soft pull, no impact.
  • Debit-card use, does not report to bureaus.
  • Bank balances, credit and bank are separate systems.
  • Marriage, credit reports remain individual.

How long negative items stay on your report

Late payments, collections and charge-offs typically remain for 7 years. Chapter 7 bankruptcy stays for 10 years; Chapter 13 for 7. Hard inquiries fall off after 2 years and stop affecting the score after 12 months. Tax liens and civil judgments no longer appear on consumer credit reports as of 2017–2018 reforms.

Negative items lose weight over time even before they fall off, a 5-year-old late payment hurts much less than a 5-month-old one.

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Frequently Asked Questions

How often does my credit score update?
Bureaus typically update within 30–45 days of any account change. FICO scores recalculate every time a lender pulls them.
Does checking my credit score lower it?
No. Checking your own score is a soft pull and has zero impact. Only hard pulls from new credit applications affect the score.
What is the fastest way to raise my score?
Lower reported utilization by paying down balances or requesting limit increases. Most users see results within one statement cycle.
Should I close old credit cards?
Usually no. Closing a card can lower the average age of accounts and reduce total available credit, raising utilization.

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