How Your FICO Credit Score Is Calculated

Quick answer

• Your FICO score is calculated based on five key factors: payment history, amounts owed, length of credit history, credit mix, and new credit.
• Payment history and amounts owed have the biggest impact, so paying bills on time and keeping balances low are crucial.
• A longer credit history generally helps your score, as does a diverse mix of credit types.
• Opening many new accounts in a short period can negatively affect your score.
• Understanding these factors empowers you to take action to improve your creditworthiness.
• Regularly checking your credit reports for errors is an essential first step.

What to check first (before you act)

Credit Report Accuracy

Before making any changes, ensure your credit reports from Equifax, Experian, and TransUnion are accurate. Errors like incorrect personal information, accounts you don’t recognize, or wrongly reported late payments can unfairly lower your score. You are entitled to a free credit report from each bureau annually at AnnualCreditReport.com. Review these reports carefully for any discrepancies.

Utilization and Balances

Examine the amounts owed on your credit accounts. High credit utilization – the amount of credit you’re using compared to your total available credit – is a significant factor. Aim to keep your utilization ratio low, ideally below 30% for each card and overall. Large balances, even if paid on time, can signal financial strain to lenders.

Payment History

Your track record of paying bills on time is the most critical component of your FICO score. Review your reports to confirm that all payments are reported accurately and that there are no missed or late payments. Even a single late payment can have a substantial negative impact.

Recent Inquiries

Check for any recent credit inquiries on your reports. Multiple “hard” inquiries – those that occur when you apply for new credit – within a short timeframe can indicate increased risk and may lower your score. Understand which inquiries are yours and dispute any that you did not authorize.

Time Horizon

Consider how long you’ve been using credit and the age of your oldest accounts. A longer credit history generally demonstrates more experience managing credit responsibly. While you can’t change the past, understanding this factor helps you appreciate the value of maintaining long-term relationships with credit providers.

Step-by-step (credit improvement workflow)

1. Obtain Your Credit Reports:

• What to do: Visit AnnualCreditReport.com to request your free credit reports from Equifax, Experian, and TransUnion.
• What “good” looks like: You have all three reports and have reviewed them thoroughly.
• Common mistake: Relying on credit monitoring services alone, which may not show all the details or dispute processes available directly through the bureaus. Avoid this by going directly to the official source.

2. Scrutinize for Errors:

• What to do: Carefully read through each report, looking for any inaccuracies. This includes incorrect personal details, accounts that aren’t yours, or misreported payment statuses.
• What “good” looks like: Your reports accurately reflect your financial life.
• Common mistake: Skimming the reports without deep attention. Avoid this by dedicating focused time to each section, comparing them across bureaus if necessary.

3. Dispute Inaccurate Information:

• What to do: If you find errors, initiate a dispute with the relevant credit bureau(s). You can usually do this online, by mail, or by phone. Provide any supporting documentation you have.
• What “good” looks like: All identified errors are being investigated and, if confirmed, corrected by the credit bureau.
• Common mistake: Not providing sufficient evidence. Avoid this by gathering all relevant documents (e.g., statements, cancellation notices) before submitting your dispute.

4. Understand Your Credit Utilization:

• What to do: Calculate the credit utilization ratio for each credit card and your overall credit. This is your balance divided by your credit limit.
• What “good” looks like: Utilization is below 30% on individual cards and overall.
• Common mistake: Focusing only on the overall utilization. Avoid this by checking each card’s ratio, as lenders often look at both.

5. Lower High Balances:

• What to do: Prioritize paying down balances on cards with high utilization. Consider making more than the minimum payment.
• What “good” looks like: Balances are significantly reduced, bringing utilization down.
• Common mistake: Only making minimum payments. Avoid this by creating a debt repayment plan and sticking to it, even if it means cutting back on other expenses temporarily.

6. Ensure All Payments Are On Time:

• What to do: Make sure every bill is paid by its due date. Set up automatic payments or calendar reminders.
• What “good” looks like: Your payment history shows a consistent record of on-time payments.
• Common mistake: Missing a due date by even a day. Avoid this by using autopay for at least the minimum amount due, or setting multiple reminders.

7. Avoid Closing Old, Unused Accounts (Carefully):

• What to do: Unless there’s a compelling reason (like an annual fee you can’t waive), consider keeping older, unused credit cards open. This helps your credit history length and utilization.
• What “good” looks like: Your oldest accounts remain open and in good standing, contributing positively to your credit history.
• Common mistake: Closing accounts to “simplify” finances, which can shorten your credit history and increase utilization. Avoid this by evaluating the impact on your score before closing.

8. Be Strategic About New Credit Applications:

• What to do: Only apply for credit when you genuinely need it. Space out applications to avoid multiple hard inquiries in a short period.
• What “good” looks like: You have a manageable number of recent inquiries on your reports.
• Common mistake: Applying for multiple credit cards or loans simultaneously. Avoid this by researching which credit products best fit your needs and waiting several months between applications.

9. Consider a Credit-Builder Loan or Secured Card (If Needed):

• What to do: If you have limited credit history or past issues, explore options like a credit-builder loan or a secured credit card to establish or rebuild positive payment history.
• What “good” looks like: You are successfully using these tools to demonstrate responsible credit management.
• Common mistake: Overspending on a secured card or not making payments on a credit-builder loan. Avoid this by treating these tools with the same seriousness as any other credit product.

10. Monitor Your Score Regularly:

• What to do: Use free services offered by your bank, credit card issuer, or reputable financial sites to track your credit score.
• What “good” looks like: You are aware of your score’s trends and can identify any sudden drops.
• Common mistake: Not monitoring at all. Avoid this by checking your score periodically (e.g., monthly) to stay informed.

What affects your score (plain language)

• Payment History: This is the most significant factor. Paying bills on time, every time, is crucial. Late payments, defaults, and bankruptcies can severely damage your score.
• Amounts Owed (Credit Utilization): How much of your available credit you’re using. Keeping balances low, especially on credit cards, is key. High utilization suggests you might be overextended.
• Length of Credit History: The longer you’ve responsibly managed credit, the better. This includes the age of your oldest account and the average age of all your accounts.
• Credit Mix: Having a variety of credit types (e.g., credit cards, installment loans like mortgages or auto loans) can be beneficial, showing you can manage different kinds of debt.
• New Credit: Opening multiple new credit accounts in a short period can signal higher risk to lenders and may temporarily lower your score due to “hard inquiries.”
• Public Records: Negative public records like bankruptcies or tax liens can have a substantial negative impact.
• Number of Accounts: While not a direct factor, the number of accounts you have can indirectly influence utilization and credit mix.
• Payment Patterns: Beyond just being on time, consistent payment behavior is viewed favorably.

What NOT to do while improving credit:

Do not close old credit card accounts just to reduce the number of cards you have; this can shorten your credit history and increase your credit utilization ratio. Do not apply for every new credit card offer you receive, as multiple hard inquiries can negatively impact your score. Avoid making only minimum payments on your credit cards if you have a high balance; focus on paying down debt to lower your utilization.

Common mistakes (and what happens if you ignore them)

Mistake	What it causes	Fix
Missing a credit card payment	Significant drop in credit score, potential late fees, negative mark on report.	Set up automatic payments or calendar reminders; pay at least the minimum due before the due date.
Maxing out credit cards	High credit utilization ratio, signaling financial distress, lower credit score.	Pay down balances aggressively; aim to keep utilization below 30% on each card and overall.
Closing old, unused credit accounts	Shortens credit history length, increases credit utilization, potentially lowers score.	Keep accounts open if they don’t have high fees; use them for small, recurring purchases and pay them off immediately.
Applying for too much credit at once	Multiple hard inquiries, signaling increased risk, temporary score decrease.	Only apply for credit when necessary; space out applications over several months.
Ignoring errors on credit reports	Incorrect negative information remains, unfairly lowering your score.	Regularly check your credit reports and dispute any inaccuracies promptly with the credit bureaus.
Co-signing a loan for someone else	You become responsible for the debt; their missed payments will hurt your credit.	Only co-sign if you are prepared to take on the full financial responsibility; understand the risks involved.
Not having any credit history	Difficulty getting loans, apartments, or even some jobs; a “thin file.”	Start with a secured credit card or a credit-builder loan to establish a positive payment history.
Not monitoring your credit score	You may miss errors or the impact of negative actions until it’s too late.	Use free score monitoring services from your bank, credit card issuer, or reputable financial websites.
Using debit cards for all purchases	No positive credit history is built; no benefits like rewards or purchase protection.	Use a credit card for everyday expenses and pay it off in full each month to build credit and earn rewards.
Assuming all credit scores are the same	You might focus on the wrong factors if you’re looking at a VantageScore instead of FICO.	Understand that FICO is the most widely used scoring model; check if your monitoring service provides FICO scores.

Decision rules (simple if/then)

• If your credit utilization is above 30%, then pay down balances because high utilization significantly harms your score.
• If you have missed a payment in the last 12 months, then prioritize making all future payments on time because payment history is the most impactful factor.
• If you are planning to apply for a mortgage, then avoid opening any new credit accounts for at least six months beforehand because new credit inquiries can temporarily lower your score.
• If your credit report shows an account you don’t recognize, then dispute it immediately with the credit bureau because fraudulent accounts can severely damage your credit.
• If you have a very old credit card with no annual fee that you don’t use, then keep it open because it contributes positively to your credit history length.
• If you only make minimum payments on a credit card with a large balance, then create a debt reduction plan because this will help lower your utilization and save on interest.
• If you are denied credit, then request the reason from the lender and review your credit reports because understanding the cause is the first step to improvement.
• If you are building credit from scratch, then start with a secured credit card or credit-builder loan because these products are designed for individuals with limited credit history.
• If you have multiple hard inquiries within a short period, then wait several months before applying for more credit because too many inquiries can signal risk.
• If your credit score is consistently below average, then focus on the two biggest factors: payment history and credit utilization.
• If you are unsure about the impact of closing an account, then check your credit utilization ratio before doing so because closing an account can increase it.
• If you receive a credit card offer, then read the terms and conditions carefully before applying because understanding fees and interest rates is important for responsible credit use.

FAQ

What is the FICO score?

The FICO score is a three-digit number that lenders use to assess your creditworthiness. It’s calculated by the Fair Isaac Corporation based on information in your credit reports.

How much does each factor influence my FICO score?

FICO scores are generally weighted as follows: Payment history (35%), Amounts owed (30%), Length of credit history (15%), Credit mix (10%), and New credit (10%). These are approximate ranges.

How often should I check my credit report?

You are entitled to a free credit report from each of the three major bureaus (Equifax, Experian, TransUnion) once every 12 months. It’s wise to check them at least annually and more often if you suspect errors or identity theft.

Can closing a credit card improve my score?

Not usually. Closing a credit card can reduce your available credit, thus increasing your credit utilization ratio, and it can shorten the average age of your credit accounts, both of which can negatively impact your score.

What is a good credit utilization ratio?

A good credit utilization ratio is generally considered to be below 30%. Keeping it below 10% is even better for maximizing your score.

How long do negative items stay on my credit report?

Most negative items, like late payments, remain on your report for seven years. Bankruptcies can stay for seven to 10 years, depending on the type.

Does checking my own credit score hurt my score?

No. “Soft inquiries,” which occur when you check your own score or when a company checks it for pre-approval offers, do not affect your credit score. Only “hard inquiries,” resulting from a credit application, can have a small, temporary impact.

How can I improve my score quickly?

The fastest ways to improve your score involve addressing credit utilization and payment history. Paying down balances and ensuring all payments are on time will have the most immediate positive effect.

What is a “thin file”?

A “thin file” refers to a credit report with very little credit history. This can make it difficult for lenders to assess your risk, so it’s important to build a credit history with responsible use of credit products.

Does my credit score reset every year?

No, your credit score does not reset annually. It is a dynamic number that reflects your ongoing credit behavior and is updated continuously as new information is added to your credit reports.

What this page does NOT cover (and where to go next)

• Specific credit score ranges and what they mean for loan approval.
• Detailed strategies for negotiating with creditors or debt collectors.
• Information on credit repair companies and their effectiveness.
• Legal advice regarding credit disputes or identity theft.
• How to obtain specific types of loans (e.g., mortgages, auto loans, personal loans).
• International credit reporting systems or scores.