What goes into your credit score and why it matters
Your credit score is a three-digit number that lenders use to decide whether to lend you money and at what interest rate. The score comes from a mathematical formula that weighs five different categories of information from your credit report. The most widely used scoring model is FICO, which ranges from 300 to 850. A higher score means lenders see you as lower risk.
The score itself is not a judgment of your character or financial responsibility in general — it is a prediction based on specific data about how you have handled borrowed money. If you have never borrowed money, you will not have a credit score at all. If you have borrowed money but paid everything on time, your score will be high. If you have missed payments, owed more than your credit limits, or had accounts sent to collections, your score will be lower.
Understanding how the score is built matters because it tells you where to focus if you want to improve it. Different actions have different effects, and some changes take longer to show up than others.
Key Takeaways
- Payment history makes up 35 percent of your FICO score, so a single missed payment can lower your score by dozens of points.
- The amount you owe compared to your credit limits (called utilization) counts for 30 percent, and paying down balances can raise your score within weeks.
- Length of credit history, mix of account types, and new inquiries make up the remaining 35 percent and change more slowly.
- Your score is recalculated every time a lender or creditor reports new information to the credit bureaus, which usually happens monthly.
- You have three separate FICO scores — one from each of the three major credit bureaus — and they may differ if the bureaus have different information about you.
Payment history: 35 percent of your score
Payment history is the single largest factor in your credit score. It measures whether you paid your bills on time. A late payment is any payment that arrives 30 days or more after the due date. The credit bureaus record how many late payments you have, how recent they are, and how late they were.
One missed payment can lower your score by 50 to 100 points depending on your current score and how late the payment was. A payment that is 30 days late hurts less than one that is 90 days late. A payment that is 120 days late hurts even more. Once an account is sent to a collection agency, the damage is severe and lasts for years.
The good news is that the impact of a late payment fades over time. A late payment from two years ago hurts your score less than one from two months ago. A late payment from seven years ago stops showing up on your credit report entirely and no longer affects your score at all.
Credit utilization: 30 percent of your score
Credit utilization is the amount of money you owe divided by the total amount of credit available to you. If you have a credit card with a $1,000 limit and you owe $300 on it, your utilization on that card is 30 percent. If you have multiple credit cards, the bureaus also calculate your total utilization across all of them.
Lenders view high utilization as a sign that you are financially stretched. The scoring model rewards utilization below 30 percent and penalizes anything above it. If you owe $900 on a $1,000 card, your score will be lower than if you owe $200 on the same card, even if you pay both on time.
Utilization changes are reflected in your score quickly — often within weeks of a payment or a new charge. This makes it one of the fastest factors to improve if you can pay down balances. Asking a credit card company to raise your limit also lowers your utilization ratio without you spending more money, though this may trigger a hard inquiry that temporarily lowers your score by a few points.
Length of credit history: 15 percent of your score
Length of credit history measures how long you have had credit accounts open. It includes the age of your oldest account, the age of your newest account, and the average age of all your accounts. The longer your history, the higher this portion of your score.
This is why closing old credit cards can hurt your score — it removes a long-standing account from the calculation and lowers your average account age. Keeping old accounts open, even if you do not use them, helps this part of your score. The account does not have to carry a balance; it just has to exist and stay in good standing.
Length of credit history changes very slowly. You cannot speed it up. If you are new to credit, this factor will work against you for several years, but it will improve automatically as time passes.
Credit mix: 10 percent of your score
Credit mix refers to the variety of types of credit accounts you have. The scoring model distinguishes between revolving credit (credit cards and lines of credit where you can borrow, repay, and borrow again) and installment credit (loans like car loans, mortgages, and personal loans where you borrow a fixed amount and pay it back in fixed monthly payments).
Having both types of credit on your report shows lenders that you can manage different kinds of debt. Someone with only credit cards looks less experienced than someone with a credit card, a car loan, and a mortgage. However, credit mix is a small part of your score, so you should not take out a loan just to improve it.
Your credit mix only changes when you open or close an account, so it is not something you can adjust quickly. Like length of credit history, it improves over time as you responsibly manage different types of credit.
New credit inquiries: 10 percent of your score
When you apply for credit, the lender pulls your credit report to decide whether to lend to you. This pull is called a hard inquiry or hard pull. Each hard inquiry can lower your score by a few points. Multiple hard inquiries in a short time can lower your score by 10 to 20 points.
The scoring model assumes that applying for a lot of new credit in a short time is risky — it might mean you are desperate for money or planning to take on more debt than you can handle. However, the model also recognizes that rate shopping is normal. If you apply for multiple car loans or mortgages within 14 to 45 days (depending on the scoring model), those inquiries may count as a single inquiry.
Hard inquiries stay on your credit report for two years but stop affecting your score after about three months. Checking your own credit report does not create a hard inquiry and does not lower your score — this is called a soft pull.
How your score is calculated and updated
The credit bureaus — Equifax, Experian, and TransUnion — collect information about your credit accounts from lenders and creditors. Each month, lenders report your account status: whether you paid on time, how much you owe, and whether your account is in good standing or in default. The bureaus then feed this information into the FICO scoring formula, which produces your score.
You do not have a single credit score. You have three FICO scores, one from each bureau, because each bureau may have different information about you. A creditor might report to Equifax and Experian but not TransUnion. A mistake on one bureau's report will not appear on the others. This is why your three scores can differ by 50 points or more.
Your score is recalculated every time new information is reported, which is usually once a month per account. If you pay down a credit card balance on the 15th of the month and the card company reports that to the bureaus on the 20th, your score can change within days. If you miss a payment, the late payment is usually reported 30 to 60 days after the due date.
What does not affect your credit score
Several things that feel like they should matter do not actually affect your score. Your income, employment history, and savings account balance are not part of the formula. Your age, race, gender, and marital status are not part of it. Soft inquiries (when you check your own credit or when a company checks it for a pre-approved offer) do not affect your score. Utility bills, rent payments, and insurance payments do not show up on your credit report unless they are sent to collections.
This is important because it means your credit score is narrower than your overall financial picture. A person with a high income and large savings but no credit history will have no credit score at all. A person with a low income but a long history of on-time payments will have a higher score than the first person.
Frequently Asked Questions
How often does my credit score change?
Your score can change every time a lender reports new information to the credit bureaus, which usually happens monthly. If you pay down a balance or miss a payment, the change typically shows up within 30 to 60 days. Scores can fluctuate by 10 to 20 points from month to month even if nothing major changed, because the formula weights recent activity more heavily.
Why do I have three different credit scores?
Each of the three major credit bureaus — Equifax, Experian, and TransUnion — maintains its own credit report about you. Not all lenders report to all three bureaus, so each bureau may have different information. Your three FICO scores can differ by 50 points or more. When you borrow money, the lender usually pulls from one or more of these bureaus.
Can I improve my credit score quickly?
Paying down credit card balances is the fastest way to see improvement — utilization changes can show up within weeks. Fixing errors on your credit report (by disputing them with the bureaus) can also help quickly. Paying bills on time going forward will improve your score over months and years, but late payments and collections damage takes years to fade.
Does checking my own credit score hurt it?
No. Checking your own credit report or score is a soft inquiry and does not affect your score. You can check it as often as you want without any penalty. You are may have access to to one free credit report per year from each bureau at annualcreditreport.com.
What is a good credit score?
FICO scores range from 300 to 850. Scores above 670 are generally considered good, and scores above 740 are considered very good. Scores below 580 are considered poor. However, what matters is what individual lenders will do with your score — some lenders work with scores as low as 580, while others require 700 or higher.