Learn About Credit Scores and What Affects Them

What Is a Credit Score and Why It Matters

A credit score is a three-digit number that represents your history of borrowing and repaying money. It typically ranges from 300 to 850, with higher scores indicating better credit behavior. Lenders, landlords, and other organizations use this number to assess how likely you are to repay borrowed money on time.

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Your credit score affects many areas of your financial life. When you apply for a mortgage, car loan, credit card, or personal loan, lenders review your score to decide whether to lend you money and at what interest rate. A higher score often means you'll receive better interest rates, which saves you thousands of dollars over the life of a loan. For example, someone with a 760 credit score might receive a mortgage interest rate of 6.5%, while someone with a 620 score might be offered 8.5% for the same loan amount. Over a 30-year mortgage of $300,000, that difference amounts to over $200,000 in additional interest paid.

Beyond lending, credit scores influence other important decisions. Landlords frequently check credit scores when reviewing rental applications. Insurance companies may use credit information to set rates for auto and home insurance. Some employers check credit reports during the hiring process for positions involving financial responsibility. Utility companies might require a deposit based on your credit score.

Credit scoring has been used since the 1950s, but the modern system emerged in 1989 when Fair Isaac Corporation (now known as FICO) introduced their widely-used credit scoring model. Today, multiple scoring systems exist, but FICO scores remain the most common.

Practical Takeaway: Understanding your credit score helps you recognize its importance in your financial decisions. Monitoring your score over time allows you to see how your financial habits affect this number.

The Five Factors That Build Your Credit Score

Five main components determine your credit score, each weighted differently in the calculation. Understanding these factors helps explain why certain actions help or hurt your score.

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Payment History (35% of your score): This is the largest factor. It tracks whether you've paid your bills on time. One late payment can lower your score by 100 points or more, depending on how late it was and your overall credit history. A 30-day late payment has less impact than a 90-day late payment. Payments that are 60 days or more overdue carry significant weight. Collections accounts, charge-offs, and bankruptcies also fall into this category and cause serious damage to your score. The good news: as negative items age, their impact decreases. A late payment from seven years ago affects your score less than one from last month.

Credit Utilization (30% of your score): This measures how much of your available credit you're using. If you have a credit card with a $5,000 limit and carry a $2,500 balance, your utilization ratio is 50%. Financial experts generally recommend keeping utilization below 30%. Using more than 30% signals to lenders that you may be financially stressed. Interestingly, using 0% of your available credit (having no balance) can also negatively impact your score, as it provides no information about your ability to manage debt responsibly. Spreading balances across multiple cards rather than maxing out one card can help maintain a lower overall utilization ratio.

Length of Credit History (15% of your score): This factor measures how long you've had credit accounts open. A longer history demonstrates sustained responsible behavior. Your credit history age is calculated as an average of all your accounts. Closing old accounts can shorten your average account age and lower your score. This is why financial advisors often recommend keeping older credit cards open, even if you don't use them frequently. If you're new to credit, you might start with a secured credit card or being added as an authorized user on someone else's account to begin building history.

Credit Mix (10% of your score): This examines the variety of credit types you have. Having different kinds of credit—such as credit cards (revolving credit), car loans, mortgages, and personal loans (installment credit)—demonstrates you can manage different borrowing situations. Someone with only credit cards has a less diverse portfolio than someone with cards, a car loan, and a mortgage. If you have limited credit types, don't open new accounts just to improve this factor; the other components matter much more.

New Credit Inquiries (10% of your score): When lenders check your credit, it creates a hard inquiry that can lower your score by a few points. Multiple hard inquiries within a short time frame (like shopping for auto loans) count as one inquiry if they happen within 14-45 days, depending on the scoring model. Checking your own credit creates a soft inquiry that doesn't affect your score. New credit accounts also factor in here; opening several new accounts in a short period appears risky to lenders.

Practical Takeaway: Focus most of your efforts on payment history and credit utilization, as these two factors make up 65% of your score. Paying bills on time and keeping credit card balances low create the biggest improvements.

Understanding Credit Reporting and Where Your Information Comes From

Your credit information is collected and maintained by three major credit reporting agencies: Equifax, Experian, and TransUnion. These companies gather data about your credit accounts and payment history, then compile this information into credit reports. Lenders, creditors, and other organizations report your account activity to these agencies, which is how information gets into your credit file.

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You may notice that your three credit scores differ slightly. This happens because not all creditors report to all three agencies. Some might report to Equifax and Experian but not TransUnion. Additionally, the three agencies may have slightly different information or update their records at different times. One agency might show a closed account while another still shows it as open. These discrepancies are normal and expected.

Your credit report contains several categories of information. Personal information includes your name, current and previous addresses, Social Security number, and employment history. Account information lists all your credit accounts, including the account type, opening date, credit limit, current balance, and payment status. Inquiry history shows which companies have requested your credit report. Public records section includes bankruptcies, tax liens, and court judgments. Collections information shows any debts that were sent to collection agencies. Negative items can remain on your report for seven years (ten years for bankruptcy), though their impact diminishes over time.

The Fair Credit Reporting Act (FCRA) gives you the right to access your credit report for free. You can request reports from all three agencies through AnnualCreditReport.com, which is the government-authorized site for free annual reports. You're entitled to one free report per agency per year. Many credit card companies and financial institutions also offer free credit report monitoring as a benefit to customers.

Errors on credit reports do occur. Common mistakes include accounts belonging to someone else on your report, incorrect account balances, duplicate listings of the same debt, or accounts showing as open when they should be closed. These errors can significantly impact your score and your financial opportunities. If you find an error, you can dispute it with the credit bureau. The bureau must investigate your dispute within 30 days and correct verified errors.

Practical Takeaway: Request your free credit reports regularly to check for errors and unauthorized accounts. Disputing inaccuracies can improve your score and prevent identity theft problems.

Actions That Hurt Your Credit Score

Certain financial behaviors cause significant damage to your credit score. Understanding what hurts your score helps you avoid costly mistakes. Late payments top the list of score-damaging actions. Even a single payment that's 30 days late can reduce your score by 17 to 50 points. A 90-day late payment might decrease your score by 100 to 150 points or more. These impacts are especially severe if you have a good payment history; the longer you've paid on time, the bigger the drop when you miss a payment. Multiple late payments create compounding damage to your score.

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Collections accounts occur when a creditor turns your unpaid debt over to a third party to collect. This negative mark stays on your report for seven years and severely damages your score. A collection account can lower your score by 100 or more points, depending on how recent it is and your overall credit profile. Medical debt that goes to collections impacts your score the same way as other debt, though some scoring models are