What Actually Makes Up Your Credit Score

Payment history — whether you've paid on time, and how severely and recently you haven't — is generally the single heaviest factor in most credit scoring models. Even one missed payment reported to a credit bureau can have an outsized, lasting effect compared to almost anything else you do right.

Credit utilization — your outstanding balances relative to your total available credit — is usually the second-heaviest factor. Keeping balances well below your limits (often cited as under 30%, with lower being better) signals lower risk than maxing out cards even if you pay them off in full every month, since scoring models typically look at your statement balance, not your after-payment balance.

Length of credit history, the mix of credit types you carry (revolving credit, instalment loans, mortgages), and recent hard inquiries each matter, but generally far less than the first two factors. A thin file with little history simply has less data to score well, regardless of how responsibly it's been managed.

Because the actual formulas are proprietary to Equifax, TransUnion, and FICO, no outside tool — including simplified educational ones — can tell you your real score. The most reliable way to check it is directly through the credit bureaus or your bank's app, not a third-party estimator.