Understanding Credit: What Actually Affects Your Score
Your credit score affects the interest rate on your mortgage, your car loan, whether a landlord rents to you, and sometimes employment background checks. Most people have only a vague sense of what actually moves it.
What a Credit Score Is
A credit score is a numerical summary of your credit history - a prediction of how likely you are to repay borrowed money. The most widely used model is FICO, with scores ranging from 300 to 850.
The bottom line
The difference between 620 and 760 on a 30-year, $400,000 mortgage can be hundreds of thousands in interest.
The Five Factors
- Payment history (35%): The biggest one. One missed payment can drop your score 50-100 points and stays on your report for seven years.
- Credit utilization (30%): The ratio of balances to limits. Keep it below 30%; below 10% is better.
- Length of credit history (15%): The longer, the better. Don't close old cards.
- Credit mix (10%): Having different account types helps. Don't open accounts just for mix.
- New credit (10%): Every application triggers a hard inquiry. Rate shopping within 14-45 days is typically treated as one inquiry.
The Simple System
One primary credit card for all regular purchases. Pay the statement balance in full every month. Hold the card for years. That behavior, maintained consistently, builds an excellent credit score over time.
The bottom line
No interest paid. Utilization stays low. History grows. Credit score follows.
Starting From Zero
A secured credit card requires a cash deposit that becomes your credit limit. The payment history gets reported and builds your score. Being added as an authorized user on a parent's or partner's longstanding account can also jumpstart your history.
The bottom line
The path from no credit to good credit typically takes 12-24 months. It's not fast. It is reliable.
What would you do?
Jordan has one credit card with a $5,000 limit. He's trying to understand how his spending level affects his score.
Your Move
Pull your free credit report at AnnualCreditReport.com. Check for errors or accounts you don't recognize. Then look up your score through your bank or Credit Karma. Note your current score and the factors listed as influencing it most.
Sources
- Consumer Financial Protection Bureau, What is a credit score?
What a credit score is and the factors that affect it
Educational information only. Not financial, tax, or legal advice or a recommendation. Figures are drawn from the primary sources cited above; verify current amounts with the source before acting.
Educational content only. Not financial, tax, or legal advice. Consult a qualified professional before making decisions based on your specific circumstances.
Last reviewed: April 2026