Your Credit Score — What It Is, How It's Built, and Why It Costs You Money

Steve Martin
23 hours ago
2 min read

Credit score gauge with needle pointing to "Good" on colored scale: red "Poor," orange "Fair," yellow "Good," green "Excellent."

Your credit score is a three-digit number that has a surprisingly large impact on your financial life. It influences whether you qualify for a loan, what interest rate you'll pay, whether a landlord will rent to you, and sometimes whether an employer will hire you.

Understanding it isn't optional — it's essential.

What is a credit score?

A credit score is a numerical summary of your credit history, designed to predict the likelihood that you'll repay debt. The most widely used model is the FICO score, which ranges from 300 to 850. Higher is better.

General ranges:

800–850: Exceptional
740–799: Very Good
670–739: Good
580–669: Fair
Below 580: Poor

What goes into it?

Five factors drive your FICO score:

Payment history (35%) — Do you pay on time? This is the biggest factor.
Amounts owed (30%) — How much of your available credit are you using? Keeping utilization below 30% helps significantly.
Length of credit history (15%) — How long have your accounts been open?
Credit mix (10%) — Do you have a variety of account types (credit cards, loans, mortgage)?
New credit (10%) — How recently have you applied for new credit?

Why does it matter financially?

The difference between a 620 and a 760 credit score on a $300,000 mortgage can translate to more than $100,000 in additional interest paid over the life of the loan. That's not a small number.

How do you improve it?

Pay every bill on time, every time. Set up autopay for at least the minimum.
Pay down credit card balances to reduce your utilization ratio.
Don't close old accounts — length of history matters.
Avoid applying for multiple new accounts in a short period.
Check your credit report annually at AnnualCreditReport.com and dispute any errors. (See Experian's information about the safety of this website.)

Your credit score is not a measure of your worth as a person. But it is a tool that, when understood and managed, saves you real money. Don't ignore it.