The 300–850 number that decides your loan rates
Most FICO and VantageScore scores live in this range. Higher = cheaper borrowing.
The single biggest factor. One late payment can outweigh everything else.
How much of your credit limit you're using. Lower is better — under 30%, ideally under 10%.
History length 15% · New credit 10% · Credit mix 10%.
3 bureaus × many score versions = dozens of scores. That's normal.
Checking your own score does NOT hurt it. Ever.