How Credit Score Is Calculated: The Full Breakdown

Your credit score is not random. It is a math formula that weighs five specific factors. Understanding how it works lets you take control of your score.

The Five Factors

1. Payment History (35%)

This is the biggest piece of your score. It answers one question: do you pay your bills on time?

• On-time payments help your score.
• Late payments of 30+ days hurt your score.
• Collections, bankruptcies, and foreclosures hurt more.
• One late payment can drop your score 50–100 points.

What to do: Set up autopay for at least the minimum payment on every account.

2. Credit Utilization (30%)

This measures how much of your credit limit you are using.

• If your limit is $10,000 and you owe $3,000, your utilization is 30%.
• Under 30% is good. Under 10% is ideal.
• High utilization signals you are close to maxing out.

What to do: Pay down balances before the statement date. Ask for a credit limit increase.

3. Length of Credit History (15%)

Lenders like to see a long track record.

• The age of your oldest account matters.
• The average age of all your accounts matters.
• Closing old accounts shortens your history.

What to do: Keep old cards open, even if you do not use them.

4. Credit Mix (10%)

This looks at the types of credit you have.

• Revolving credit: credit cards, lines of credit.
• Installment credit: mortgages, car loans, student loans.
• Having both shows you can handle different kinds of debt.

What to do: Do not open loans just for mix. Let it build naturally.

5. New Credit (10%)

This tracks how often you apply for new credit.

• Each hard inquiry can lower your score 5–10 points.
• Multiple inquiries in a short time look risky.
• Rate shopping for a mortgage or car loan counts as one inquiry if done within 14–45 days.

What to do: Only apply for credit when you need it.

Step-by-Step: Use This Knowledge to Improve

1. Pull your free credit report — See what is actually being counted.
2. Check payment history — Set autopay on everything.
3. Lower utilization — Pay cards down before statements close.
4. Keep old accounts open — Do not close your oldest card.
5. Limit new applications — One inquiry at a time.
6. Wait — Time heals old negatives. Most fall off in 7 years.

FAQ