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Definition

Credit Score

A three-digit number representing your creditworthiness based on your credit history.

Written by Jere Salmisto·Reviewed by CalcFi Editorial·Last verified: 2026-05-13
TL;DR

Credit Score is A three-digit number representing your creditworthiness based on your credit history. Used in credit.

What Is Credit Score?

A credit score is a three-digit number (typically 300–850) that represents your creditworthiness—how likely you are to repay borrowed money. The most widely used credit score is the FICO score, calculated using five factors: payment history (35%), amounts owed (30%), length of credit history (15%), new credit (10%), and credit mix (10%). Higher scores (above 750) qualify you for better interest rates and loan terms; lower scores (below 580) make borrowing more expensive or difficult. Credit scores determine the interest rates on mortgages, auto loans, credit cards, and personal loans. You can check your credit score for free annually at annualcreditreport.com. Improving your credit score takes time but is worth the effort—a 100-point improvement can save you thousands in interest over a lifetime of borrowing.

How Credit Score Is Calculated

The FICO score, the most widely used model in U.S. consumer lending, is computed from data in your credit report at one or more of the three nationwide consumer reporting agencies (Equifax, Experian, TransUnion). The five FICO factors and their weights: PAYMENT HISTORY (35%) — on-time vs. late payments, collections, bankruptcies; AMOUNTS OWED (30%) — total debt, credit utilization ratio (balance ÷ available credit), debt across account types; LENGTH OF CREDIT HISTORY (15%) — average age of accounts, age of oldest account; NEW CREDIT (10%) — recent applications and inquiries; CREDIT MIX (10%) — variety of credit types (revolving, installment, mortgage). VantageScore, the FICO competitor, uses similar inputs with somewhat different weights. Score ranges (FICO 8): 300-579 Poor; 580-669 Fair; 670-739 Good; 740-799 Very Good; 800-850 Exceptional. The CFPB publishes consumer-facing guidance on what each factor reflects and how to improve it. The Fair Credit Reporting Act (FCRA) entitles every U.S. consumer to one FREE credit report from EACH bureau every 12 months through AnnualCreditReport.com — this is the official federally mandated channel. Common mistakes: (1) confusing a credit REPORT (the underlying record of accounts and history) with a credit SCORE (the derived three-digit number); the report is free under FCRA, but the score is often only free through certain providers, (2) checking your own score does NOT count as a hard inquiry — only lender-pulled hard inquiries affect the score, (3) closing old credit cards REDUCES average credit age and may HURT the score even if it feels intuitive, (4) carrying a balance does NOT help your score — paying in full helps utilization; carrying a balance just costs interest, (5) authorized-user status on a healthy account can help thin-file consumers but doesn't move the needle for those with established credit. Errors on credit reports are common; the FCRA gives you the right to dispute and have errors corrected, typically within 30 days.

Related Terms

FICO Score
specialization
Credit Utilization
see also
Credit History
see also
Debt-to-Income Ratio
see also
Default
opposite

Frequently Asked Questions

What is a good credit score?

On the FICO 8 scale, scores 670-739 are considered "Good," 740-799 "Very Good," and 800-850 "Exceptional." For mortgage lending, 740+ typically qualifies for the best available rates; below 620 usually means subprime pricing or denial for conventional loans. Auto-lender thresholds vary by lender. Credit-card issuers set their own internal cutoffs. The CFPB guidance emphasizes that the SAME score can produce different outcomes at different lenders — there is no single universal "approval" threshold.

How can I check my credit score for free?

Under the Fair Credit Reporting Act (FCRA), every U.S. consumer can obtain ONE FREE credit REPORT from each of the three nationwide bureaus (Equifax, Experian, TransUnion) every 12 months through AnnualCreditReport.com — the official federally mandated site. The free reports show your full credit HISTORY (accounts, balances, payment record) but typically NOT the numerical SCORE. Many credit card issuers and banks now provide free FICO or VantageScore numbers in your account portal. The CFPB cautions consumers against paying for "free" credit-score subscriptions when the underlying report is already free by law.

What hurts my credit score the most?

Payment history is the largest factor (35% of FICO). A SINGLE late payment 30+ days past due can drop a previously-good score 60-110 points and stay on your report for 7 years. Collections, charge-offs, bankruptcies (7-10 years), and foreclosures have larger and longer-lasting impacts. Beyond payment history, HIGH UTILIZATION (using a large share of your available credit) is the next biggest negative — utilization above 30% materially reduces scores; utilization above 90% is severe. Hard inquiries from new credit applications have a small short-term effect (5-10 points typically) but recover within a year.

How long does it take to improve my credit score?

It depends on the starting point and the issue. Paying down high credit-card balances to bring utilization below 10% can lift scores within ONE MONTH (utilization updates as soon as the new statement balance reports). On-time payment history rebuilds over months and years — a single 30-day-late note remains on your report for 7 years but its impact fades over time. Collections and charge-offs stay for 7 years from the original delinquency date; bankruptcies for 7-10 years. The CFPB notes there are no legitimate quick fixes — any service promising to remove ACCURATE negative information for a fee is likely a scam.

What is credit utilization, and what's a good ratio?

Credit utilization is the ratio of your outstanding revolving credit balance to your total available revolving credit. Example: $2,000 in credit card balances against $20,000 in total available credit lines = 10% utilization. Lower is better. Most credit-scoring research suggests utilization below 30% is the threshold for "good," below 10% optimal, and 1-9% effectively maximal benefit (showing some use, no excess). Utilization is calculated both per-card and across-all-cards; both matter. Crucially, utilization is based on the BALANCE REPORTED to the bureaus, which is typically the statement balance — paying mid-cycle can lower reported utilization even if you pay in full each month.

Does checking my own credit score hurt my credit?

No. Checking your own credit report or score is a SOFT INQUIRY, which has zero impact on your score. Only HARD INQUIRIES — when you apply for new credit and the lender pulls your report — affect your score, and typically only by 5-10 points temporarily. Hard inquiries fall off your report after 2 years and stop affecting your score after 12 months. Multiple hard inquiries from rate-shopping the same loan type (mortgage, auto, student loan) within a 14-45 day window are typically counted as a SINGLE inquiry under FICO scoring. The CFPB confirms that monitoring your own credit is encouraged and never penalized.

Related Calculators

Credit Score Impact Calculator→

Primary Sources

This definition is cross-checked against the following primary sources. All sources are free, public, and authoritative.

  1. CFPB — What is a credit score? — Consumer Financial Protection Bureau
  2. AnnualCreditReport.com — federally mandated free credit reports — Federal Trade Commission / mandated by Fair Credit Reporting Act
  3. FTC — Free Credit Reports under FCRA — Federal Trade Commission
  4. CFPB — Credit Reports and Scores — Consumer Financial Protection Bureau
Educational reference, not personal advice. CalcFi glossary entries are educational explanations of personal-finance concepts, cross-checked against U.S. federal primary sources. They are not personalized tax, legal, investment, or insurance advice. Tax rules, contribution limits, and rates change — verify current values against the linked primary sources before acting. For material financial decisions, consult a licensed professional.
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