A credit score is a three-digit number, typically ranging from 300 to 850, that summarizes how risky you look to a lender based on your history of borrowing and repaying money. It affects whether you get approved for a credit card, a car loan, or a mortgage, and it directly affects the interest rate you're offered. A difference of even 50-100 points can mean tens of thousands of dollars in extra interest over the life of a mortgage.
Despite how much rides on it, most people have only a vague sense of what actually moves their score. Below is a breakdown of the five real scoring factors, what genuinely helps, and the myths worth retiring for good.
The five factors that make up your score
Credit scoring models (most commonly FICO, with VantageScore as a common alternative) weigh several categories of information from your credit report. The exact weights vary slightly by model, but FICO's widely cited breakdown looks like this:
| Factor | Approximate weight | What it measures |
|---|---|---|
| Payment history | 35% | Do you pay your bills on time? |
| Amounts owed (credit utilization) | 30% | How much of your available credit are you using? |
| Length of credit history | 15% | How long have your accounts been open? |
| New credit | 10% | How many new accounts or hard inquiries recently? |
| Credit mix | 10% | Do you have different types of credit (cards, loans)? |
1. Payment history (35%)
This is simply whether you pay at least the minimum due, on time, every billing cycle. A single payment that's more than 30 days late can meaningfully hurt your score, and the damage gets worse the later and more frequent the missed payments are. It carries the most weight of any factor, which makes sense: a lender's biggest question is simply "does this person pay back what they borrow?"
2. Amounts owed / credit utilization (30%)
Credit utilization is the percentage of your available credit that you're currently using. If you have a $10,000 total credit limit across your cards and you're carrying a $3,000 balance, your utilization is 30%.
The utilization sweet spot
As a general guideline, keeping utilization under 30% is good, and under 10% is better. This applies both to your overall utilization across all cards and to each individual card. Utilization is calculated from your statement balance, so it can swing month to month even if you always pay your card off in full. Timing large purchases around your statement date can help if you're optimizing closely.
3. Length of credit history (15%)
This factors in the age of your oldest account, the age of your newest account, and the average age across all accounts. A longer history generally signals more proven, stable repayment behavior, which is part of why closing your oldest credit card can quietly hurt your score: it removes years of history from the average.
4. New credit (10%)
Applying for several new credit accounts in a short window is associated with higher risk, so each hard inquiry (a lender checking your credit because you've formally applied for something) causes a small, temporary dip, and multiple applications in a short period compound that effect. Most scoring models treat inquiries for the same type of loan (like shopping for a mortgage or auto loan) within a short window as a single inquiry, since that behavior looks like comparison shopping rather than a borrowing spree.
5. Credit mix (10%)
Having a mix of credit types (a credit card, a car loan, a mortgage) can modestly help your score, since it shows you can manage different kinds of credit responsibly. This is the smallest and least actionable factor: it's not worth taking out a loan you don't need purely to diversify your credit mix.
What genuinely raises your score
Given those weights, the highest-leverage habits are unsurprising once you see the math:
- Never miss a payment. Since payment history is 35% of the score, automating at least the minimum payment on every account is the single most protective habit you can build.
- Keep utilization low. Paying down credit card balances, or asking for a credit limit increase (without spending more), both lower your utilization ratio and can meaningfully lift your score within a billing cycle or two.
- Leave old accounts open. Even a card you rarely use is quietly helping your average account age and your total available credit, as long as it has no annual fee worth avoiding.
- Space out new credit applications. Apply for new credit only when you actually need it, and avoid opening several accounts in a short window.
- Be patient. Scores respond to sustained behavior over months, not a single good decision. There's no legitimate shortcut that replaces a track record of on-time payments and low utilization.
Key takeaway
Payment history and credit utilization together make up 65% of your score. If you only fix two things, automate every payment so none are ever late, and keep your balances well below your credit limits.
Myths to stop believing
Myth: Carrying a balance month to month helps your score. False, and an expensive myth at that. Utilization is based on your statement balance regardless of whether you pay it off before or after the due date, and carrying a balance only costs you interest with no scoring benefit. Pay your statement in full every month if you can.
Myth: Checking your own credit hurts your score. False. Checking your own score or report is a soft inquiry, which has zero impact. Only hard inquiries from lenders reviewing an application affect your score, and even those cause a small, temporary dip rather than lasting damage.
Myth: Your income affects your credit score. False. Credit scores are calculated purely from your credit report: payment history, balances, account ages, and inquiries. Income isn't part of the calculation at all, though lenders do separately consider income when deciding whether to approve you and for how much.
Myth: You need to be in debt to build a credit score. False. You need a history of credit accounts being used and repaid, which isn't the same as carrying debt. Using a credit card for small purchases and paying it off in full every month builds credit history without costing you a cent in interest. A secured credit card, which requires a refundable cash deposit as the credit limit, is a common way to start building history from scratch with minimal risk.
Myth: Closing a paid-off card is good for your score. False, usually. Closing a card removes both its available credit (which can raise your utilization ratio) and, eventually, its account history. Unless it has a fee that's not worth paying, it's often better left open and unused.
How credit scores connect to the rest of your finances
A strong credit score earns its keep everywhere else in your financial life: it lowers your cost of borrowing, from the interest rate on a future mortgage to whether you even qualify for the best rewards credit cards. If you're actively working through debt, the strategy you choose in avalanche vs. snowball will also steadily improve your utilization ratio as balances fall, giving your score a boost as a side effect of the payoff plan. And if you're just getting your finances organized from scratch, your first $1,000 covers where new money should go before credit optimization even becomes a priority.
Back to the budget
With the fundamentals of debt and credit covered, the next thing to revisit is how your monthly cash flow is structured in the first place. See the 50/30/20 rule — and when to break it.
Frequently asked questions
Does checking my own credit score lower it?
No. Checking your own score or report is called a soft inquiry and has no effect on your score at all. Only hard inquiries, which happen when a lender checks your credit because you've applied for new credit, cause a small, temporary dip.
Does my income affect my credit score?
No. Credit scores are calculated entirely from your credit report, which tracks debt and repayment behavior, not income. A high earner with missed payments can have a much lower score than a modest earner who always pays on time.
Should I close old credit cards I don't use anymore?
Usually not, unless the card has an annual fee you want to avoid. Closing a card can shorten your average credit history and reduce your total available credit, both of which can lower your score even though it feels like a responsible cleanup move.
How long do late payments stay on my credit report?
Typically up to seven years, though their negative impact on your score fades well before then, especially if you keep making on-time payments afterward.