Your credit score is built from five main categories of information pulled from your credit report: payment history, amounts owed, length of credit history, credit mix, and new credit inquiries. Each category carries a different weight, and understanding how they interact gives you a clear picture of what moves your score up or down.
Payment History: The Biggest Factor
Payment history accounts for 35% of a FICO score, making it the single most influential category. It tracks whether you’ve paid your credit accounts on time, how late any missed payments were (30, 60, 90, or 120+ days), and whether any accounts have gone to collections or resulted in a bankruptcy. A single 30-day late payment can drop your score significantly, and the damage is worse the higher your score was before the missed payment.
The good news is that recent behavior matters more than old behavior. A late payment from five years ago hurts less than one from five months ago. Most negative marks stay on your credit report for seven years, though their impact fades over time. Consistently paying every bill on time is the most reliable way to build and maintain a strong score.
Amounts Owed and Credit Utilization
How much you owe relative to your available credit makes up 30% of your FICO score. The key metric here is your credit utilization ratio: the percentage of your total available credit that you’re currently using. If you have a $10,000 credit limit across all your cards and carry a $3,000 balance, your utilization is 30%.
Keeping utilization below 10% is generally the target for building and maintaining a strong score. Going higher than 30% tends to drag your score down noticeably. Interestingly, 0% utilization isn’t ideal either. When you’re not using any credit at all, scoring models have less information about how you manage debt, which can prevent you from earning maximum points in this category. Carrying a small balance that you pay off each month hits the sweet spot.
Utilization is calculated both per card and across all your accounts. Maxing out one card while leaving others untouched can still hurt, even if your overall utilization looks reasonable.
Length of Credit History
This category makes up 15% of your FICO score and looks at how long your accounts have been open. It considers the age of your oldest account, the age of your newest account, and the average age across all accounts. A longer track record gives lenders more data to evaluate, which is why closing old credit cards (even ones you don’t use) can hurt your score by shortening your average account age.
This is also why young adults and people new to credit often start with lower scores regardless of how responsibly they manage their money. There’s no shortcut here. Time is the only way to build this part of your score.
Credit Mix
Credit mix accounts for 10% of your score. Scoring models reward you for successfully managing different types of credit. These fall into two broad categories: revolving credit (credit cards, lines of credit) and installment credit (auto loans, mortgages, student loans, personal loans). Having both types on your report signals that you can handle different repayment structures.
That said, 10% is a relatively small slice. You should never take out a loan you don’t need just to diversify your credit mix. This factor matters most at the margins, when you’re trying to push a good score into excellent territory.
New Credit Inquiries
The final 10% of your FICO score reflects how recently and how often you’ve applied for new credit. Each time you apply for a credit card, loan, or mortgage, the lender pulls your credit report, creating what’s called a hard inquiry. A single hard inquiry might lower your score by a few points, and the effect typically fades within a year.
Scoring models are smart enough to recognize rate shopping. If you apply with multiple mortgage lenders or auto lenders within a short window (usually 14 to 45 days depending on the model), those inquiries get grouped and counted as one. This doesn’t apply to credit card applications, though. Applying for several cards in a short period will generate multiple separate inquiries.
How VantageScore Weighs Things Differently
FICO isn’t the only scoring model. VantageScore 4.0, which is used by a growing number of lenders, breaks things into six categories instead of five. Payment history carries even more weight at 41%. Credit utilization drops to 20%, while length and mix of credit are combined into a single 20% category. Recent credit behavior accounts for 11%, total balances for 6%, and available credit for 3%.
The practical takeaway is the same across both models: paying on time and keeping balances low are by far the two most important things you can do. Together, those two factors account for 61% to 65% of your score depending on which model is being used.
Rent and Utility Payments Are Starting to Count
Traditionally, rent and utility payments didn’t appear on credit reports at all, which meant they had zero effect on your score. That’s changing. Both FICO 10T and VantageScore 4.0 can incorporate rent and utility payment history when that data is reported to the credit bureaus. Fannie Mae and Freddie Mac have begun allowing loans evaluated using VantageScore 4.0 specifically because it can factor in this kind of nontraditional data.
The catch is that your landlord or utility company has to actually report your payments to a credit bureau. Most don’t do this automatically. Some third-party services will report your rent payments for a monthly fee, and a few utility companies have started voluntary reporting programs. If you have a thin credit file (meaning few traditional accounts), getting rent payments reported can help establish a score where you might not have had one before.
What Doesn’t Affect Your Score
Your credit score is based entirely on information in your credit report, which means several things people assume matter actually don’t. Your income, savings, investments, and net worth are not part of the calculation. Neither is your employment status or job title. Checking your own credit score (a soft inquiry) has no effect. Debit card transactions don’t show up on credit reports, so they’re invisible to scoring models.
Race, religion, marital status, and age are also excluded by law. Your address appears on your credit report for identity verification purposes, but it doesn’t factor into your score. Living in an expensive zip code won’t help you, and living in a lower-income area won’t hurt you.
One nuance worth knowing: while standard credit scoring models ignore income, some specialized models used in mortgage lending may consider your income, total debt, and down payment alongside your credit score. These are lending decisions layered on top of your score, not changes to the score itself.