Credit scores affect loan rates, rental applications, and sometimes employment — yet many people have only a vague sense of what actually goes into them. FICO scores, the most widely used model, draw on five factors from your credit report. Understanding the weight and logic of each one makes the score much easier to manage deliberately.
1. Payment History (35%)
The largest single factor. Your history of paying on time — or not — is the most direct predictor of future repayment behavior according to credit scoring models.
What damages this factor: payments 30+ days late, collections, charge-offs, repossessions, foreclosures, and bankruptcies. A single missed payment that reaches 30 days past due can drop a score meaningfully — particularly for someone with an otherwise clean file, where the miss is more anomalous.
What helps: consistent on-time payments across all accounts over time. There is no shortcut here; it takes months and years of clean payment history to build this factor up.
2. Credit Utilization (30%)
Your credit utilization is the percentage of your available revolving credit (primarily credit cards) that you are using. If you have a $5,000 total credit limit across all cards and carry $1,500 in balances, your utilization is 30%.
Most guidance recommends staying below 30% utilization. Staying below 10% tends to score even better. Scoring models read high utilization as a potential sign of financial stress.
Utilization is calculated both overall and per individual card. A single maxed-out card can hurt your score even if your overall utilization is low.
This factor responds quickly to changes. Pay down balances and your utilization improves; scores can recover within one or two billing cycles.
3. Length of Credit History (15%)
Scoring models consider how long you have had credit accounts — specifically the age of your oldest account, the age of your newest account, and the average age across all accounts.
Longer history provides more data for lenders to assess. An account open for 10 years with consistent good behavior is more informative than 18 months of history.
This factor is why closing old accounts often is not advisable, even if you no longer use them. Closing accounts reduces your average account age and removes available credit from your utilization calculation.
4. Credit Mix (10%)
Scoring models slightly favor credit files with a variety of account types: revolving credit (credit cards), installment loans (auto, personal, student), and sometimes mortgages. This mix demonstrates you can manage different types of debt responsibly.
This factor weight is small — 10% — so it is not worth taking on debt purely to diversify. But it explains why having only credit cards produces a slightly lower score than having a mix.
5. New Credit (10%)
Each time you apply for credit, the lender typically performs a hard inquiry on your credit report. Hard inquiries affect your score slightly — usually 2–5 points per inquiry — and remain on your report for two years, though their scoring impact fades after about a year.
Multiple applications in a short period signal that you may be financially stressed or searching for credit. Exception: rate-shopping for mortgages, auto loans, or student loans within a short window (typically 14–45 days depending on the scoring model) is treated as a single inquiry.
What Is Not in Credit Scores
FICO and VantageScore explicitly cannot include: income, employment history, savings account balances, marital status, age, race, religion, or national origin. Your net worth and job stability do not show up in the score itself, though lenders may verify these separately during loan underwriting.
Checking Your Credit Reports
Credit scores are calculated from your credit reports, which are maintained by Experian, Equifax, and TransUnion. Errors on these reports affect your score and can be disputed. Reviewing your reports annually — or before major loan applications — is a practical habit. You are entitled to free reports from each bureau annually through annualcreditreport.com.
