A credit score is a three-digit number, usually between 300 and 850, that summarizes how reliably you've repaid borrowed money in the past. Lenders use it to decide whether to approve a loan and what interest rate to offer. It sounds abstract until you realize it can be the difference between a 6% and a 14% rate on the same car loan.

The five factors that build the number

The myth that trips up almost everyone

Checking your own credit score does not lower it. This is called a "soft inquiry" and it's invisible to lenders. What does affect your score is a "hard inquiry" — which only happens when you actually apply for new credit, like a loan or a new card.

You cannot damage your credit score by looking at it. You can only damage it by mismanaging what's on it.

Utilization: the lever with the fastest effect

Credit utilization is the percentage of your available credit you're currently using. Someone with a $5,000 limit and a $2,500 balance is at 50% utilization — generally considered high. Getting utilization under 30%, and ideally under 10%, tends to move a score faster than almost any other single change, and it can happen within one billing cycle.

Try thisPay down a credit card balance a few days before the statement closing date (not just the due date) — that's the balance that typically gets reported to the credit bureaus.

What doesn't matter as much as people think

Income is not a factor in your credit score at all — a high earner with missed payments can score lower than a modest earner who pays on time. Your score also isn't affected by rent or utility payments unless you specifically enroll in a reporting service, since those aren't automatically reported the way loans and credit cards are.

Building credit is less about tricks and more about a small set of consistent habits: pay on time, keep balances low relative to limits, and let accounts age. It's slow, unglamorous, and it works.