How credit scores actually work

A credit score is a compressed summary of how risky it is to lend you money, usually on a 300–850 scale. Despite the mystique around it, most of the score comes from just two factors. Payment history — whether you paid every bill on time — is the biggest single piece in typical scoring models. A single payment 30 days late can stay on your record for years, while years of on-time payments build trust slowly and quietly.

The second big factor is utilization: how much of your available credit you are actually using. The widely used ceiling is 30% of your limit, and scores usually peak below 10%. Because issuers typically report your statement balance, the payment that matters is the one before the statement closes — paying in full after the statement is good, but a high balance on statement day still reports as high utilization.

Several myths waste people's time. Checking your own score is a soft check and does not hurt it. Carrying a balance month to month does not build credit faster — paying in full, on time, every month builds the same history without paying a cent of interest. And opening several new accounts in a short window lowers the average age of your credit history, which usually dents the score more than the new limits help it.

The practical move: automate at least the minimum payments so history is never damaged by a forgotten due date, keep total utilization under 30% (under 10% if a big application is coming), leave old accounts open to preserve the length of your history, and pull your free credit reports once a year to dispute errors — mistakes on credit files are common and fixable.