How My Credit Score Is Calculated

Estimate how your financial habits affect your credit score using the FICO® scoring model

How Your Credit Score is Calculated: The Complete Guide

Your credit score is one of the most important financial numbers in your life. It determines whether you’ll be approved for loans, credit cards, mortgages, and even affects your insurance premiums and rental applications. Understanding how your credit score is calculated gives you the power to improve it strategically.

In the United States, the most widely used credit scoring models are FICO® Score (used in 90% of lending decisions) and VantageScore. While both range from 300 to 850, they weigh factors slightly differently. This guide focuses on the FICO® model, which breaks down as follows:

Factor	Weight in FICO® Score	What It Measures
Payment History	35%	Whether you’ve paid past credit accounts on time
Amounts Owed	30%	How much credit you’re using compared to your limits
Length of Credit History	15%	How long your credit accounts have been established
Credit Mix	10%	The variety of credit products you have experience with
New Credit	10%	How many new accounts you’ve recently opened

1. Payment History (35% of Your Score)

Your payment history is the most significant factor in your credit score calculation. Lenders want to see that you consistently pay your bills on time. This category considers:

• Payment information on credit cards, retail accounts, installment loans, finance company accounts, and mortgage loans
• Public records including bankruptcies, foreclosures, suits, wage attachments, liens, and judgments
• Details on late or missed payments (called “delinquencies”) and how long you’ve been delinquent on accounts
• How many accounts show no late payments

According to Consumer Financial Protection Bureau, even one 30-day late payment can drop a good credit score by 100 points or more. The later the payment (60 days, 90 days), the more damage it does to your score.

Late Payment Status	Score Impact (Approximate)	Recovery Time
30 days late	60-110 points	9-12 months
60 days late	80-135 points	12-18 months
90+ days late	100-160 points	2-3 years
Charge-off/Collection	120-200 points	7 years (but impact lessens over time)

2. Amounts Owed (30% of Your Score)

The second most important factor is how much you owe relative to your credit limits, known as your credit utilization ratio. This measures:

• The amount owed on all accounts
• The amount owed on different types of accounts (credit cards vs. installment loans)
• How many accounts have balances
• How much of your available credit you’re using (utilization ratio)

Experts recommend keeping your credit utilization below 30%, with the best scores typically having utilization under 10%. For example, if you have a $10,000 credit limit across all cards, try to keep your balance below $1,000.

A study by the Federal Reserve found that consumers with utilization ratios below 20% had average FICO® Scores of 750 or higher, while those with ratios above 80% had average scores below 600.

3. Length of Credit History (15% of Your Score)

This factor considers how long you’ve had credit accounts. Generally, a longer credit history will increase your score. The calculation looks at:

1. How long your oldest account has been open
2. How long your newest account has been open
3. The average age of all your accounts
4. How long specific credit accounts have been established
5. How long it’s been since you used certain accounts

Closing old accounts can hurt your score by reducing your average account age. Even if you don’t use an old credit card, keeping it open (with no annual fee) can help your score by maintaining a longer credit history.

4. Credit Mix (10% of Your Score)

Lenders like to see that you can handle different types of credit responsibly. The credit mix category considers:

• Credit cards (revolving credit)
• Retail accounts
• Installment loans (auto, personal, student loans)
• Mortgage loans
• Finance company accounts

You don’t need to have every type of account, but having a mix of revolving credit (credit cards) and installment loans (auto, mortgage) can help your score. According to Experian, consumers with the highest credit scores (800+) typically have an average of 7 credit accounts, including both revolving and installment credit.

5. New Credit (10% of Your Score)

Opening several new credit accounts in a short period can indicate greater risk to lenders. This factor considers:

• How many new accounts you’ve opened recently
• How many recent credit inquiries you have (hard inquiries)
• How long it’s been since you opened a new account
• How long it’s been since lenders made credit inquiries
• Whether you’ve re-established a positive credit history after past payment problems

Each hard inquiry (when you apply for credit) can temporarily lower your score by about 5-10 points. However, multiple inquiries for the same type of loan (like auto loans or mortgages) within a 14-45 day period are typically counted as one inquiry.

How Credit Scores Are Used

Your credit score affects nearly every aspect of your financial life. Here’s how different score ranges typically impact your financial opportunities:

Credit Score Range	Classification	Mortgage Interest Rate (30-year fixed, 2023 avg)	Auto Loan APR (60-month, 2023 avg)	Credit Card APR (2023 avg)
800-850	Exceptional	5.5%	3.5%	12%
740-799	Very Good	5.8%	4.0%	14%
670-739	Good	6.2%	5.0%	18%
580-669	Fair	7.5%	8.5%	22%
300-579	Poor	9.0%+ (if approved)	12%+ (if approved)	25%+ (if approved)

Data source: myFICO and Federal Reserve reports (2023)

Common Credit Score Myths Debunked

There’s a lot of misinformation about credit scores. Here are some common myths and the truth behind them:

1. Myth: Checking your own credit hurts your score. Truth: When you check your own credit (a “soft inquiry”), it doesn’t affect your score. Only “hard inquiries” from lenders when you apply for credit can impact your score.
2. Myth: You need to carry a balance to build credit. Truth: You can build credit by using your card and paying it off in full each month. Carrying a balance just costs you interest.
3. Myth: Closing old accounts will help your score. Truth: Closing old accounts can hurt your score by reducing your available credit and shortening your credit history.
4. Myth: All debts are treated equally. Truth: Mortgages and student loans are viewed more favorably than credit card debt by scoring models.
5. Myth: You only have one credit score. Truth: You have multiple scores from different bureaus (Experian, Equifax, TransUnion) and different scoring models (FICO, VantageScore).

How to Improve Your Credit Score Fast

While building excellent credit takes time, there are several strategies to improve your score relatively quickly:

1. Pay all bills on time: Set up automatic payments to avoid missed payments. Even one late payment can significantly hurt your score.
2. Reduce credit card balances: Pay down revolving debt to lower your credit utilization ratio. Aim for under 30%, ideally under 10%.
3. Ask for higher credit limits: Increasing your limits (without increasing spending) lowers your utilization ratio.
4. Become an authorized user: Being added to a family member’s old, well-managed credit card can help your score.
5. Dispute errors on your credit report: About 1 in 5 people have errors on their credit reports. Check yours annually at AnnualCreditReport.com.
6. Use credit-building tools: Services like Experian Boost can add utility and phone payments to your credit history.
7. Avoid opening too many new accounts: Each new application creates a hard inquiry that temporarily lowers your score.

For more detailed guidance, the Federal Trade Commission offers excellent resources on understanding and improving your credit.

Long-Term Credit Building Strategies

While the above tactics can help quickly, building excellent credit is a long-term process. Here are strategies for maintaining a high score:

• Maintain low credit utilization: Keep your balances well below your limits, even if you pay in full each month.
• Keep old accounts open: The age of your accounts matters, so think twice before closing old credit cards.
• Have a mix of credit types: Responsibly managing different types of credit (credit cards, auto loans, etc.) can help your score.
• Limit credit applications: Only apply for credit when you really need it to minimize hard inquiries.
• Monitor your credit regularly: Use free services to track your score and report for errors or fraudulent activity.
• Build an emergency fund: Having savings prevents you from relying on credit for unexpected expenses.

Remember that credit building is a marathon, not a sprint. The habits you develop today will affect your financial opportunities for years to come.

Credit Score FAQs

How often does my credit score update?
Your credit score can update as often as your creditors report information to the credit bureaus, typically every 30-45 days. However, some accounts (like credit cards) may report more frequently.

Why do I have different scores from different bureaus?
Each credit bureau (Experian, Equifax, TransUnion) may have slightly different information about you, and lenders may report to one, two, or all three bureaus. Additionally, there are multiple scoring models (FICO® Score 8, FICO® Score 9, VantageScore 3.0, etc.) that calculate scores differently.

How long does negative information stay on my credit report?
Most negative information (late payments, collections, charge-offs) stays for 7 years. Bankruptcies stay for 7-10 years depending on the type. Hard inquiries stay for 2 years but only affect your score for about 12 months.

Does paying off a collection account remove it from my credit report?
No, paying off a collection account doesn’t remove it from your report (it stays for 7 years from the original delinquency date), but it will show as “paid” which looks better to lenders. Some newer scoring models (like FICO® 9 and VantageScore 4.0) ignore paid collections.

Can I have a good credit score with no debt?
Yes! You don’t need to carry debt to have a good score. The key is demonstrating responsible credit use – having accounts, using them lightly, and paying them off consistently. Many people with the highest scores pay their credit cards in full each month.

How does marriage affect credit scores?
Marriage itself doesn’t combine credit scores or reports. You and your spouse will continue to have separate credit histories. However, when you open joint accounts, those will appear on both of your credit reports and affect both scores.