Understanding Credit Scores
Everything you need to know about credit scores — what they are, how they work, and how to improve yours.
Key Takeaways
- Your credit score is a 300–850 number that determines your interest rates and loan approvals
- Payment history (35%) and credit utilization (30%) together make up nearly two-thirds of your score
- FICO and VantageScore can differ by 20–40 points — know which one your lender uses
- Checking your own score is always free and never hurts your credit
- You have dozens of different credit scores — different versions for mortgages, auto loans, and credit cards
What Is a Credit Score?
A Credit Score is a three-digit number, typically ranging from 300 to 850, that tells lenders how likely you are to repay borrowed money. Think of it as a financial GPA: the higher the number, the more trustworthy you appear to banks, credit card companies, and anyone else considering lending you money.
Three major credit bureaus — Equifax, Experian, and TransUnion — track your borrowing and payment history in what is called a Credit Report. Every time you open a credit card, take out a loan, or make (or miss) a payment, that activity gets reported to one or more of these bureaus.
Different scoring models, most commonly FICO and VantageScore, use the data in your credit report to calculate your score. Because each model weighs factors slightly differently, you may have a slightly different score at each bureau. A Hard Inquiry — like the kind that occurs when you apply for a new card or loan — can temporarily lower your score by a few points, but the effect fades within about a year.
Drag the needle to explore score ranges
Credit Score Ranges
Credit scores fall into five broad tiers. Where you land determines the interest rates you qualify for, the products available to you, and how easily you can get approved.
Excellent
800–850
Top tier — best rates, highest limits, instant approvals.
Best rates, highest limits, instant approvals
21%
of Americans
Very Good
740–799
Near-top rates, easy approvals, strong card offers.
Great rates, easy approvals, premium card offers
25%
of Americans
Good
670–739
Acceptable borrower — average rates, most products available.
Good rates, most loans available
21%
of Americans
Fair
580–669
Subprime — higher rates, may need a co-signer.
Higher rates, may need a co-signer for large loans
18%
of Americans
Poor
300–579
Limited options — secured cards, high-interest loans.
Limited products, secured cards, highest interest rates
16%
of Americans
The 5 Factors That Determine Your Score
Your FICO score is built from five categories of information in your credit report. Understanding each factor helps you focus on what moves the needle most.
Whether you pay your bills on time. This is the single most important factor.
How Late Payments Affect Your Score
| Severity | Score Impact | Description |
|---|---|---|
| 1–29 days late | No impact on score | Late fees from creditor, but not reported to bureaus |
| 30 days late | -60 to -110 points | First delinquency reported; significant damage |
| 60 days late | -85 to -135 points | Greater damage; possible penalty APR |
| 90 days late | -105 to -155 points | Severe damage; account may be closed |
| 120+ days late | -130 to -175 points | Account may be charged off |
| Collections | -150 to -200+ points | Debt sold to collection agency; devastating impact |
Credit Utilization measures the percentage of your available credit you're currently using. Lower is better — people with 800+ scores average about 7% utilization.
Utilization Tiers & Their Impact
| Range | Impact | Recommendation |
|---|---|---|
| 0% | Slightly negative | Some usage is better than none |
| 1–9% | Best for your score | People with 800+ scores average ~7% utilization |
| 10–29% | Good | Still considered responsible usage |
| 30–49% | Starting to hurt | Lenders see increasing risk |
| 50–74% | Significant negative | Clear signal of financial strain |
| 75–100%+ | Severe damage | Major red flag to lenders |
The average age of all your credit accounts. Longer history is better.
The variety of credit types you have — cards, loans, mortgage. A healthy mix includes both revolving credit (like credit cards) and installment loans (like a mortgage or auto loan).
Recent applications and new accounts can temporarily lower your score. Each Hard Inquiry typically costs 3–5 points, though the effect fades within about 12 months.
FICO vs. VantageScore
There are two main credit scoring models used in the United States: FICO (created by Fair Isaac Corporation) and VantageScore (developed jointly by the three major credit bureaus). Both use a 300–850 range, but they weigh your credit data differently and have different requirements for generating a score.
| Factor | FICO | VantageScore |
|---|---|---|
| Payment History weight | 35% | 41% (VS 4.0) |
| Credit Utilization weight | 30% | 20% (VS 4.0) |
| Minimum history needed | 6 months | 1 month |
| Rate shopping window | 45 days | 14 days |
| Score range | 300–850 | 300–850 |
| Most common usage | Mortgage, auto, credit cards | Free score tools, some lenders |
In practice, FICO scores dominate lending decisions — approximately 90% of top lenders use FICO when evaluating applications for mortgages, auto loans, and credit cards. VantageScore is more commonly seen on free score-checking tools and banking apps. Because the two models weigh factors differently (for example, VantageScore puts more emphasis on payment history and less on utilization), your scores can differ noticeably between them.
One practical difference is the rate-shopping window: FICO gives you 45 days to shop for the best mortgage or auto loan rate without multiple inquiries hurting your score, while VantageScore only allows 14 days. Plan your rate shopping accordingly.
When you apply for a mortgage, auto loan, or student loan, lenders pull your credit report — creating a hard inquiry. Normally each hard inquiry costs you 3–5 points. But scoring models recognize that smart borrowers shop around for the best rate, so they bundle multiple inquiries of the same loan type into a single inquiry if they fall within a specific time window.
FICO uses a 45-day deduplication window for mortgage, auto, and student loan inquiries. Any inquiries of the same type within 45 days count as one. Older FICO versions (still used by some lenders) use a 14-day window.
VantageScore uses a shorter 14-day rolling window, but it applies to all inquiry types — including credit cards — not just mortgages and auto loans.
Best practice: Regardless of which model your lender uses, try to complete all your rate shopping within a two-week period. This ensures you're protected under both scoring models.
Which Credit Score Do Lenders Actually Use?
Not all credit scores are created equal. Different lenders use different scoring models depending on the type of loan you're applying for. Your mortgage lender, auto dealer, and credit card issuer may each pull a different version of your FICO Score — and the number they see can vary significantly from the free score on your banking app.
Mortgage
Scoring Model
FICO 10T / VantageScore 4.0
Score Range
300–850
Notes
VantageScore 4.0 available since July 2025; FICO 10T transition date TBD. Uses trended data.
Scoring Model Update: VantageScore 4.0 has been available for conforming mortgages since July 2025. The transition to FICO Score 10T is still pending (date TBD), replacing the legacy FICO 2, 4, and 5 models.
Auto Loans
Scoring Model
FICO Auto Score 8/9
Score Range
250–900
Notes
Extra emphasis on auto loan payment history.
Credit Cards
Scoring Model
FICO Bankcard Score 8
Score Range
250–900
Notes
Extra weight on credit card payment history.
Common Credit Score Myths
Misinformation about credit scores is everywhere. Let's separate fact from fiction on the most common misconceptions.
“Checking your own credit hurts your score.”
Checking your own score is a soft inquiry — it has zero effect. Only hard inquiries from lender applications can affect your score, typically by just 3-5 points.
“Closing old credit cards helps your score.”
Closing old cards usually hurts by reducing your average credit age and increasing your utilization ratio. Keep old cards open with a small recurring charge.
“Carrying a balance builds credit faster.”
Credit bureaus only care about on-time payments and utilization. Paying in full is better — you build the same credit history without paying interest.
“Your income directly affects your credit score.”
Income is not part of any credit score formula. Only payment behavior, utilization, credit age, mix, and inquiries matter. Lenders look at income separately.
Quiz: Test Your Knowledge
Question 1 of 5What is the range of a FICO credit score?