When you apply for a credit card, an apartment, or a car loan, the company wants to guess one thing: will this person pay me back? A is the number they use to make that guess. It's a three-digit number, usually between 300 and 850, and higher is better.

You aren't born with one, and not having a score yet doesn't mean anything is wrong. It means you haven't borrowed enough for the system to have an opinion about you yet.

What the number measures

Your score is built from your , a running record of money you've borrowed and how you've handled it. The score doesn't know your income, your savings, or your race. It watches your borrowing habits over time and boils them down to a single number.

What goes into your score

The exact formula is secret, but the big pieces are well known. Roughly, your score breaks down like this:

  • Payment history (about 35%): do you pay on time? This is the single biggest piece.
  • Credit utilization (about 30%): how much of your available credit you're using.
  • Length of history (about 15%): how long you've had credit open.
  • New credit and credit mix (the rest): recent applications and the types of accounts you have.

Notice what sits at the top. The two heaviest factors, paying on time and not maxing out your cards, are both entirely within your control.

Tip
You can look at your own score and report for free, and doing so never costs you points. How to Check Your Credit for Free shows exactly where to go.

Why your score matters

A higher score doesn't only unlock loans; it makes borrowing cheaper. The same car loan might come with a low for someone with strong credit and a much higher one for someone with thin or rough credit. Over the life of a loan, that gap can be thousands of dollars in extra .

Your credit score isn't a measure of how much money you have or how good a person you are. It measures one habit: paying back what you borrow, on time. That's a habit anyone can build.

If you're starting from nothing, you get to build the number the right way from day one. How to Build Credit From Zero walks through the safest first steps.