Credit Score Basics

What a credit score is

A credit score is a number — usually 300 to 850 — produced by a statistical model that analyzes your credit history and predicts the probability you'll default on a new loan. The two dominant scoring models are FICO (Fair Isaac Corporation) and VantageScore (built by the three major credit bureaus jointly). Each model has multiple versions, and lenders pick which version to use based on the credit decision they're making.

Most personal-loan lenders pull FICO 8 or FICO 9. Mortgage lenders are required by Fannie Mae and Freddie Mac to pull FICO 2, 4, or 5 (the so-called 'classic' versions). Auto lenders typically use FICO Auto Score 8 or 9. The scores can differ by 10–50 points across versions for the same person, even pulled on the same day.

Score ranges

Exceptional (800–850). Top-tier underwriting. Approval is nearly automatic on most products; rates land at the bottom of the lender's published range.

Very good (740–799). Strong rates on personal loans, mortgages, and most credit cards. Most prime lenders offer essentially identical pricing in this tier and the next.

Good (670–739). The middle of the market. Approval rates are high but offered APRs sit closer to the middle of a lender's range than the bottom.

Fair (580–669). Approval becomes harder for unsecured personal loans; the lenders who say yes price meaningfully above the prime market. Secured cards and credit-builder loans are good tools at this tier.

Poor (300–579). Most unsecured prime lenders decline. Subprime installment lenders and tribal lenders sometimes approve at APRs above 30%, sometimes well above. Focus on rebuilding via secured products and on-time history before borrowing.

The five factors that drive FICO

Payment history (35%). Whether you've paid on time. One 30-day late payment is the single biggest score event most borrowers ever experience — it can drop a high-700s score by 60–110 points and takes 2–3 years of clean history to fully recover from.

Amounts owed / credit utilization (30%). How much of your available revolving credit you're using. The healthy zone is under 30%; under 10% is optimal for top scores. Carrying a $9,000 balance on a $10,000 credit line — 90% utilization — drops scores significantly even if all payments are on time.

Length of credit history (15%). Average age of your accounts. Closing old credit cards lowers this number and is one reason we recommend keeping old cards open with zero balances after paying them off.

Credit mix (10%). Whether you have both installment loans (auto, mortgage, personal) and revolving credit (cards). Borrowers with both tend to score higher than borrowers with only one type.

New credit (10%). How many recent hard inquiries and new accounts you have. Each hard inquiry typically drops your score 3–10 points and stays on your report for 12 months (24 for scoring purposes on some models).

VantageScore weights are similar but not identical. The same underlying behaviors drive both models.

How to improve your score

Pay every account on time. Set up autopay for at least the minimum on every revolving and installment account. A single 30-day late report can undo a year of progress.

Lower utilization on cards. If you carry balances, pay them down before the statement closing date — the balance on that date is what gets reported to the bureaus, not the balance on the due date. Getting utilization below 10% across all cards moves the score most.

Don't close old accounts unnecessarily. Closing an old card lowers your total credit limit (raising utilization) and shortens your average account age. Keep them open with small recurring charges and autopay-in-full.

Limit hard inquiries when shopping is over. Rate-shopping for a single loan type within a 14–45 day window counts as one inquiry under FICO. But applying for unrelated credit (a card, then a personal loan, then an auto loan) within a few months stacks the negative impact.

Dispute errors. Pull your free reports at AnnualCreditReport.com and review every line. Errors are common; the FCRA gives you the right to dispute, and bureaus must investigate within 30 days. A successful dispute can move the score quickly.

Add positive trade lines if needed. If your file is thin (few open accounts), an authorized-user position on a family member's well-managed card, a secured credit card, or a credit-builder loan can establish positive history that the scoring model rewards.

How loans affect your score

Applying for a personal loan triggers a hard inquiry (3–10 point temporary drop) and adds a new account (lowers average account age slightly, also temporary). Once the loan is open and reporting on-time payments, the new installment line typically improves credit mix and adds positive payment history. If the loan is used to consolidate revolving balances, utilization usually drops sharply, which is the biggest positive driver in the short term.

Defaulting on a loan is severely negative. A charge-off (a creditor declaring the debt uncollectible) drops scores 60–150 points and stays on the report for seven years. Collections accounts compound the damage. The recovery curve is long: even with perfect post-default behavior, full score recovery takes 4–6 years.

Free ways to check your credit

AnnualCreditReport.com — the only federally authorized source for the free annual reports from Experian, Equifax, and TransUnion. As of 2023, the bureaus made these reports available weekly at no cost (extended from the original annual cadence under the FCRA). This is the authoritative source for your underlying report data.

Credit Karma and similar apps — show your VantageScore from TransUnion and Equifax (not FICO) with weekly updates. The VantageScore here typically tracks but doesn't exactly equal the FICO that lenders pull. Useful for trend monitoring, not for predicting the exact score a lender will see.

Discover Credit Scorecard, Experian, Capital One CreditWise — many issuers offer free FICO 8 access to customers and sometimes to non-customers. These match what most personal-loan lenders pull.

Your lender or card issuer's monthly statement. Many banks and credit unions print your FICO 8 score on the statement at no charge. It updates monthly.

Common credit-score myths

Myth: Checking my own credit hurts my score. No. Checking your own credit is a 'soft inquiry' and has zero impact on your score.

Myth: I need to carry a balance to build credit. No. Carrying a balance just costs you interest. On-time payment of statement balances in full builds the same positive history without the cost.

Myth: Closing credit cards improves my score. No. Closing reduces total available credit and shortens average account age. Both lower your score, at least temporarily.

Myth: Paying off a collections account removes it from my report. No. The account remains on your report for seven years from the original delinquency date regardless of payoff. Some newer scoring models (FICO 9, VantageScore 3.0+) reduce the impact of paid collections, but they remain visible.

Myth: My income affects my credit score. No. Income is not in any FICO or VantageScore model. Lenders separately consider income when underwriting, but it doesn't enter the score itself.