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A credit score is a three-digit number between 300 and 850 that summarizes how reliably you have repaid debt in the past. Lenders use it to predict how likely you are to repay new debt. The higher your score, the less risk you represent, and the better terms you qualify for on mortgages, car loans, credit cards, and even apartment leases. Understanding what the number means and what drives it is one of the most practical things you can do for your financial life.
The Score Ranges and What They Mean
| Score Range | Rating | What It Means in Practice |
|---|---|---|
| 800-850 | Exceptional | Best rates on everything. Automatic approvals. |
| 740-799 | Very Good | Qualifies for nearly all loans at competitive rates. |
| 670-739 | Good | Approved for most products. Slightly higher rates. |
| 580-669 | Fair | Approved for some products with higher rates and fees. |
| 300-579 | Poor | Difficulty qualifying. Secured cards and subprime loans only. |
Where Your Score Comes From
Three credit bureaus collect data about your borrowing history: Equifax, Experian, and TransUnion. Each maintains a separate file on you. Companies like FICO and VantageScore use mathematical models to analyze that data and produce a score. FICO scores are the most widely used by lenders — over 90% of top lenders use FICO scores in lending decisions.
You have multiple scores simultaneously: one from each bureau, calculated by multiple scoring models. Your Equifax FICO score may differ slightly from your TransUnion FICO score because the data in each bureau’s file can differ slightly. This is normal.
The Five Factors That Determine Your Score
FICO calculates your score using five categories, each weighted differently:
| Factor | Weight | What It Measures |
|---|---|---|
| Payment history | 35% | Have you paid on time? |
| Amounts owed (utilization) | 30% | How much of your credit are you using? |
| Length of credit history | 15% | How old are your accounts? |
| Credit mix | 10% | Do you have different types of credit? |
| New credit | 10% | Have you applied for new credit recently? |
Payment history and utilization together make up 65% of your score. These are the two levers that move your score the most. Everything else is secondary.
Why Your Credit Score Matters Beyond Loans
Most people know credit scores affect loan rates. Fewer realize how broadly they affect daily life:
- Apartment rentals: Most landlords run a credit check. A score below 620-650 can get your application rejected in competitive rental markets.
- Car insurance premiums: Most states allow insurers to use credit-based insurance scores. A poor credit score can add $500-$1,500/year to your auto insurance premium compared to someone with excellent credit.
- Cell phone contracts: Carriers run soft credit checks for postpaid plans. Poor credit may require a deposit.
- Employment: Some employers (particularly in financial services) run credit checks as part of background screening. This requires your consent.
- Utility deposits: Electric, gas, and water companies may require deposits from customers with low credit scores.
How to Check Your Credit Score for Free
You are entitled to a free credit report from each bureau weekly at annualcreditreport.com. This is the official, federally mandated free access — not a paid service. Reports show your full credit history but not your score.
For free score access:
- Credit Karma: Free VantageScore 3.0 from TransUnion and Equifax, updated weekly
- Experian free account: Free FICO Score 8 from Experian, updated monthly
- Your bank or credit card: Many major banks (Chase, Discover, Bank of America, Capital One) show your FICO score for free in your account dashboard
- Discover Credit Scorecard: Free FICO score even if you are not a Discover customer
What Does Not Affect Your Credit Score
Common misconceptions about what harms your score:
- Income: Your salary is not part of your credit file. High income does not improve your score; low income does not lower it.
- Checking your own score: Checking your own credit score is a soft inquiry and has zero impact on your score.
- Debit card usage: Debit cards are not credit. Using a debit card builds no credit history whatsoever.
- Paying rent and utilities (usually): Traditional landlords and utility companies do not report to credit bureaus. Some newer services (Experian Boost, Rental Kharma) allow you to add these payments, but they are not automatic.
- Being married: Your credit score is individual, not joint. Marriage does not merge credit files.
For more on building your score from scratch, see our guide on how to build credit from scratch. To understand what a good score looks like for specific goals, see our guide on what is a good credit score in 2026.
Sources: FICO score factor weights; Consumer Financial Protection Bureau credit score guidance; Experian credit score range definitions. This article is for informational purposes only.
