Your FICO score is a three-digit number that lenders use to decide whether to approve you for credit and at what interest rate. This number summarizes your credit history into a single snapshot of your financial reliability, and it influences the cost of everything from credit cards to mortgages.
What Exactly Is a FICO Score?
Developed by the Fair Isaac Corporation, the FICO score is the most widely used credit scoring model in the United States. It pulls data from your credit reports compiled by the major credit bureaus—Experian, TransUnion, and Equifax—to predict the likelihood that you will become 90 days past due on a debt in the next 24 months. While other scoring models exist, FICO remains the standard that most lenders rely on when making quick, objective lending decisions.
The Five Factors That Determine Your Score
Understanding how your FICO score is calculated allows you to make targeted improvements. The model weighs five specific categories, each contributing a different percentage to your overall score.
Payment History (35%)
This is the most significant factor and reflects whether you have paid past accounts on time. Late payments, collections, bankruptcies, and any sign of default will damage this portion of your score more than any other element.
Amounts Owed (30%)
Lenders examine how much debt you are carrying relative to your available credit. High balances close to your credit limit—known as high credit utilization—signal risk, while low balances demonstrate responsible management of credit.
Length of Credit History (15%)
The age of your oldest account, the age of your newest account, and the average age of all your accounts contribute to this category. A longer history generally boosts your score because it provides more data to assess your behavior over time.
Credit Mix (10%)
Having a variety of credit types—such as credit cards, installment loans, and mortgages—can positively impact this portion. It shows that you can manage different kinds of repayment structures responsibly.
New Credit (10%)
Opening several new accounts in a short period can lower your score temporarily. Each application results in a hard inquiry, and multiple inquiries suggest you may be taking on more debt than you can handle.
What the Numbers Mean: The Ranges
FICO scores range from 300 to 850, and lenders categorize these numbers into tiers that determine your eligibility and interest rates.
