A FICO credit score is a three-digit number, ranging from 300 to 850, that lenders use to gauge how likely you are to repay a debt. It’s the most widely used credit scoring model in the United States, and it directly affects whether you get approved for loans and credit cards, and what interest rate you’ll pay. The score is built entirely from data in your credit reports at the three major bureaus: Equifax, Experian, and TransUnion.
How Your Score Is Calculated
FICO scores pull from five categories of credit data, each weighted differently:
- Payment history (35%): Whether you’ve paid bills on time. This is the single biggest factor. Even one late payment can drag your score down significantly, and the more recent the missed payment, the worse the damage.
- Amounts owed (30%): How much of your available credit you’re using, often called credit utilization. If you have a credit card with a $10,000 limit and carry a $3,000 balance, your utilization on that card is 30%. Lower is generally better, and keeping utilization under 30% is a common benchmark, though people with the highest scores tend to stay under 10%.
- Length of credit history (15%): How long your accounts have been open. A longer track record helps your score because it gives lenders more data to judge your behavior.
- New credit (10%): How many accounts you’ve recently opened or applied for. Each application triggers a hard inquiry on your credit report, which can temporarily lower your score by a few points.
- Credit mix (10%): The variety of credit types you carry, such as credit cards, an auto loan, and a mortgage. Having a mix signals that you can manage different kinds of debt, though this is the least important factor and not worth taking on debt just to diversify.
Score Ranges and What They Mean
FICO organizes scores into five tiers:
- Poor (below 580): You’ll have difficulty getting approved for most credit products. When you do qualify, expect high interest rates or requirements like a security deposit.
- Fair (580 to 669): You can qualify for many loans, but you’re considered a subprime borrower and will pay higher rates than average.
- Good (670 to 739): This is where most lenders start offering competitive terms. You’re near or above the median score for U.S. consumers.
- Very Good (740 to 799): You’ll qualify for better-than-average rates on most products. This range opens the door to premium credit cards and favorable loan terms.
- Exceptional (800 and above): The best rates available. In practice, most lenders treat scores above 780 similarly, so chasing a perfect 850 offers little additional benefit.
Why Your Score Directly Affects Your Wallet
The gap between a mediocre score and an excellent one translates into real money. On a $350,000, 30-year conventional mortgage, someone with a 620 FICO score would pay roughly 7.14% interest, while someone with a 780 score would pay around 6.25%. That difference of nearly a full percentage point adds up to tens of thousands of dollars over the life of the loan, roughly $230 more per month or about $83,000 in extra interest over 30 years.
The pattern holds across auto loans, credit cards, and personal loans. A higher score means lower rates, smaller monthly payments, and more money staying in your pocket.
There’s More Than One FICO Score
You don’t have just one FICO score. You have dozens. FICO creates different versions of its scoring model, and lenders choose which version to use based on the type of credit you’re applying for.
FICO Score 8 is the most widely used base model. It’s the version many credit card issuers and personal loan lenders rely on. FICO Score 9 improved on it by ignoring paid collection accounts and reducing the negative impact of unpaid medical collections. Both versions ignore collection accounts where the original unpaid balance was under $100.
On top of base scores, FICO produces industry-specific versions. Auto lenders typically pull a FICO Auto Score, which is fine-tuned to predict risk on car loans specifically. Credit card issuers often use FICO Bankcard Scores. These industry-specific scores range from 250 to 900, rather than the standard 300 to 850.
Mortgage lending is its own world. Most mortgage lenders still use older FICO versions: FICO Score 5 from Equifax, FICO Score 4 from TransUnion, and FICO Score 2 from Experian. These older models don’t include some of the consumer-friendly updates in newer versions, which is why your mortgage score may differ from the score you see on a banking app.
The newest models, FICO Score 10 and 10T, are gradually being adopted. FICO 10T is notable because it looks at “trended data,” meaning it examines how your balances and credit limits have changed over the previous 24 months or longer. This means it can tell the difference between someone who pays off their card every month and someone who carries a growing balance, even if both have the same balance on the day the score is calculated.
FICO Scores vs. VantageScore
VantageScore is the main alternative to FICO. It was created by the three credit bureaus and uses many of the same credit report data points, but the two models differ in several practical ways.
The biggest difference is who can get scored. FICO requires at least one credit account that’s six months old and some activity on an account in the past six months. VantageScore can generate a score as long as your credit report has at least one account, even if it’s brand new. This makes VantageScore more accessible for people who are just starting to build credit.
The models also handle rate shopping differently. When you’re comparing mortgage or auto loan offers, multiple lenders may pull your credit within a short window. FICO groups those inquiries together so they count as a single inquiry, using a 45-day window for newer models and 14 days for older ones. It also has a 30-day buffer, meaning any mortgage, auto, or student loan inquiries from the past 30 days won’t affect your FICO score at all. VantageScore deduplicates inquiries within a 14-day window but applies this across all types of credit, not just mortgages, auto loans, and student loans.
VantageScore 3.0 and 4.0 both ignore paid collections entirely and disregard even unpaid medical collections regardless of balance. FICO Score 8, still the most commonly used version, does not ignore paid collections and doesn’t treat medical debt differently from other collections. The free score you see on many banking apps is often a VantageScore, which is why it may not match the FICO score a lender pulls when you actually apply.
Where to Check Your FICO Score
Many banks and credit card issuers provide free FICO score access through their apps or online portals. If your issuer participates, you’ll typically see your score updated monthly. You can also purchase scores directly from myFICO.com, which is the only place that shows you all of your different FICO score versions across all three bureaus.
Keep in mind that checking your own score is a “soft inquiry” and has zero impact on your credit. You can check it as often as you like without worrying about lowering it.
How to Build and Protect Your Score
Since payment history carries the most weight at 35%, the single most effective thing you can do is pay every bill on time. Setting up autopay for at least the minimum payment on each account eliminates the risk of a missed due date dragging your score down.
Keeping your credit utilization low is the second biggest lever. If you can, pay your credit card balance before the statement closing date rather than the due date. Your statement balance is what typically gets reported to the bureaus, so paying early means a lower utilization ratio shows up on your credit report.
Avoid closing old credit cards unless they carry an annual fee you can’t justify. Closing an account shortens your average account age and reduces your total available credit, both of which can lower your score. If a card has no annual fee, keeping it open and occasionally using it for a small purchase is the better move.
When shopping for a mortgage, auto loan, or student loan, do your rate comparisons within a focused window. FICO’s deduplication means multiple hard inquiries for the same loan type within 45 days count as one. Spreading applications over several months, by contrast, means each one hits your score separately.