Updated October 2026
How Credit Scores Are Calculated: The 5 Key Factors
Want to know how credit scores are calculated? It's simpler than you think. Your FICO score, the score most lenders use, breaks down into five factors. Each factor has a different weight, so some matter more than others.
- Payment history: 35%
- Amounts owed (credit utilization): 30%
- Length of credit history: 15%
- New credit: 10%
- Credit mix: 10%
These are FICO's weights for the general population, so the exact impact can vary from person to person. Understanding how credit scores are calculated helps you focus on the habits with the biggest impact and see where you land on the credit score ranges lenders use.
Payment History (35% of Your Score)
This is the biggest piece of your credit score. Lenders want to know: do you pay your bills on time? Your payment history includes credit cards and loans, plus rent or utility bills if they're reported to the bureaus.
One payment reported 30 or more days late can ding your score. The more recent it is, the more it hurts, so a late payment from two years ago weighs less than one from last month.
To improve here: never miss a due date. Set up automatic payments for at least the minimum if you tend to forget.
If you have no accounts reporting yet, you need one before you can build a payment history. The Self Visa® Credit Card fits here because there's no credit check to apply and Self reports your payments to all three credit bureaus. As of October 2026, it requires a $100 minimum deposit, has no annual fee the first year and $25 after that, and carries a 27.74% variable APR. Terms and conditions apply.
Amounts Owed and Credit Utilization (30% of Your Score)
This measures how much you owe, especially how much of your available credit you're actually using. If you have a $1,000 credit limit and a $900 balance, your utilization is 90%. If you have a $100 balance, it's 10%.
A common rule of thumb is to keep utilization below 30%, and lower is better. Understanding your credit utilization ratio is key to improving your score quickly.
To improve here: pay down your balances or ask for a credit limit increase. Even paying a few hundred dollars off can drop your utilization significantly.
Length of Credit History (15% of Your Score)
This factors in how long your accounts have been open. The longer your credit history, the more data lenders have about your habits. Old accounts help your score, even if you don't use them much.
This is one reason closing old credit cards can hurt your score. It can shorten your average account age and lower your available credit.
To improve here: keep old accounts open when it makes sense. If you're just starting out, learn how long it takes to build credit and be patient.
Credit Mix (10% of Your Score)
This looks at the variety of credit you have. Lenders want to see that you can handle different types of credit, like credit cards (revolving accounts) and car loans, mortgages, or student loans (installment loans).
If you only have credit cards, adding an installment loan may help a little over time. If you already have a car loan and student loans, you're in good shape.
To improve here: don't open accounts just for variety. Use the credit types that make sense for your life.
New Credit (10% of Your Score)
This tracks how often you've recently applied for and opened credit. When you apply for a credit card or loan, the lender usually pulls your credit. That's called a hard inquiry, and according to FICO, one inquiry typically lowers your score by fewer than five points.
Several hard inquiries in a short time can signal higher risk to lenders. Rate shopping is the exception: FICO counts multiple mortgage, auto, or student loan inquiries within a short window as a single inquiry.
To improve here: only apply for credit when you actually need it. Space out applications by at least a few months. Checking your own credit is a soft inquiry and doesn't count against you.
How Credit Scores Are Calculated by FICO vs VantageScore
FICO is the most common score, but VantageScore is another option. VantageScore looks at the same kinds of information, but groups and weights it differently. Payment history is the most influential factor in both, and both put heavy weight on your balances and utilization.
Most lenders use FICO, so that's the score to focus on. The strategy is the same either way: pay on time, keep balances low, and build a long history. Want to get a 700 credit score? Master these five factors.
Monitor Your Progress
Tracking your credit shows you which factors are improving. Free credit monitoring tools can help you watch your score and see how your actions affect each factor. Many services also offer detailed breakdowns of your credit report, showing you exactly where you can improve.
Understanding Your Credit Report
Learning to read your credit report is just as important as understanding your score. Your report shows all the details behind those five factors, so you can see exactly what's helping or hurting you.
Build All Five Factors With the Right Tools
If you're starting from scratch, building all five factors takes time. The right tools can help you add on-time payments to your report sooner. Our Self review covers how the Self Visa® Credit Card works in more detail.
Kikoff is a low-cost way to add a revolving account that builds payment history and keeps utilization low. As of October 2026, the Kikoff Credit Account gives you a $750 credit line for $5 a month with no credit check and no interest, and Kikoff reports your balance and payments to all three bureaus. The line only works in Kikoff's store, so see our Kikoff review for details.
Kikoff Credit Account
Kikoff Credit Account
Everything you need to build your credit, right in one app. Build credit, lower debt, and unlock progress with tools that actually work.
Standout feature
An avg increase of +86 points within a year with on-time payments
Fees
$5/month for Basic plan, $20/mo for Premium plan $35/mo for Ultimate plan
Pros
Helps both payment history and credit utilization, the two factors that move scores most
Cons
Monthly fee continues for as long as you keep the account open
Pairing a card with a credit builder loan like the Self Credit Builder Account can help with more than one factor at once. It adds an installment loan to your credit mix, and as of October 2026, Self reports every payment to all three bureaus. You get your savings back at the end of the 24-month term, minus interest and fees.
Frequently Asked Questions
What's a good credit score?
FICO scores range from 300 to 850. Scores of 670 to 739 are generally considered good, and 740 to 799 is very good. Scores of 800 and above are exceptional.
How often does my score update?
Your credit report updates when creditors report new information, usually monthly. Your score can change whenever your report changes.
Can I improve my score quickly?
Some improvements are quick: paying down a balance can lower your utilization within a billing cycle or two. Others take time, since building a long payment history takes months or years.
Does checking my own credit hurt my score?
No. Soft inquiries, like checking your own credit, don't affect your score. Only hard inquiries, which happen when you apply for new credit, do.
How long do negative items stay on my report?
Late payments, collections, and charge-offs generally stay on your report for 7 years. A Chapter 7 bankruptcy can stay for up to 10 years, and a Chapter 13 bankruptcy for 7 years.
The Firstcard team writes simple, research-backed guides on credit, cards, and credit building. Firstcard has been helping people build credit and save money since 2020. Full profile and latest articles →
