Understanding Your Credit Score: The 5 Factors That Matter

Your credit score is a three-digit number that lenders use to assess your creditworthiness. It ranges from 300 to 850, and it influences the interest rates you're offered, whether you get approved for loans and credit cards, and even your insurance premiums and rental applications.

But what actually goes into that number? Let's break down the five factors that determine your credit score.

1. Payment History — 35%

This is the single most important factor. Lenders want to know: do you pay your bills on time, every time?

A single late payment (30 days past due) can drop your score by 60 to 100 points. The higher your starting score, the bigger the drop. Accounts sent to collections, charge-offs, bankruptcies, and foreclosures can devastate your score and remain on your report for 7 to 10 years.

How to protect it: Set up automatic payments for at least the minimum due on every account. Never miss a due date.

2. Credit Utilization — 30%

Credit utilization measures how much of your available credit you're using at any given time. If you have a $10,000 credit limit and a $3,000 balance, your utilization is 30%.

The golden rule is to keep utilization below 30%. Below 10% is ideal. High utilization signals to lenders that you may be overextended and reliant on credit.

Key insight: Utilization is based on your statement balance, not your carried balance. Even if you pay in full each month, a high statement balance can hurt your score. Make a mid-cycle payment to keep your statement balance low.

3. Length of Credit History — 15%

This factor considers the age of your oldest account, your newest account, and the average age of all accounts. A longer credit history generally helps your score because it demonstrates a sustained track record.

Keep old accounts open. Closing an old credit card reduces your average account age and your total available credit, both of which can lower your score.

4. Credit Mix — 10%

Lenders like to see that you can responsibly manage different types of credit: revolving accounts (credit cards) and installment loans (mortgages, auto loans, student loans). Having a healthy mix gives your score a small boost.

Don't take out a loan just for your credit mix. This factor is minor, and the cost of unnecessary debt far outweighs any score benefit.

5. New Credit and Inquiries — 10%

Each time you apply for new credit, a hard inquiry is recorded on your report. Each hard inquiry can lower your score by a few points, and too many in a short period signals risk to lenders.

When rate-shopping for a mortgage, auto loan, or student loan, multiple inquiries within a 14-to-45-day window are typically counted as a single inquiry. This courtesy does not apply to credit card applications.

The Bottom Line

Your credit score is a reflection of your financial habits over time. Payment history and credit utilization together account for 65% of your score. Focus on paying every bill on time and keeping your credit card balances low, and the rest will follow.