Lesser-Known Factors That Still Affect Your Credit Score

Credit scoring models look at the types of accounts you carry, not just how you manage them. A mix of revolving credit (like credit cards) and installment loans (like auto loans, student loans, or a mortgage) signals that you can handle different borrowing structures responsibly. This factor typically accounts for about 10% of a FICO score.

This doesn't mean you should take out a loan you don't need just to diversify. Unnecessary debt is never advisable. But it does explain why a person with only credit cards may score differently than someone with the same payment history who also carries a manageable installment loan.

When someone adds you as an authorized user on their credit card, that account — including its age, balance, and payment history — can appear on your credit report. If the primary account holder has a strong track record, this can boost your score. If they carry high balances or miss payments, it can work against you.

The reverse is also true: if you've added someone to your account, their activity as an authorized user doesn't affect your score, but the account still shows on theirs. Regularly check your own report to understand which accounts are appearing and why.

Every time you open a new credit account, it lowers the average age of all your accounts. Credit scoring models reward longer credit histories because they provide more data about how you behave over time. Opening several new accounts in quick succession — even with good intentions — can temporarily drag down your average account age.

This is one reason credit experts generally caution against opening multiple cards in a short window. Space out new applications when possible and be intentional about timing, especially if a major borrowing event like a mortgage application is on the horizon.

Closing a credit card you no longer use seems like tidy financial housekeeping. In practice, it can create two separate score problems. First, it removes that account's available credit from your total, which increases your overall utilization ratio — sometimes significantly. Second, if the account was old, closing it can shorten your credit history over time as the account eventually drops off your report.

Neither consequence is necessarily catastrophic, but it's worth knowing the tradeoff before closing accounts impulsively. If a card has no annual fee, keeping it open and occasionally using it for a small recurring charge may preserve more score value than closing it.

A bill sent to collections — even a small one from a forgotten medical visit or an old utility account — can appear on your credit report and cause significant score damage. Many consumers don't discover these entries until they check their report or apply for credit. Unpaid collections can remain on a credit report for up to seven years from the date of the original missed payment.

Checking your credit reports regularly through the official free access channels available under federal law is the most reliable way to catch these entries early. Disputing inaccurate entries is a right afforded to all consumers under the Fair Credit Reporting Act (FCRA).

When you formally apply for new credit — a card, a loan, a financing plan — the lender typically performs a hard inquiry on your credit report. Each hard inquiry can lower your score by a small amount, usually a few points, and remains visible on your report for two years (though its scoring impact generally fades after about 12 months).

Rate-shopping for the same type of loan, such as comparing mortgage offers, is treated differently by most scoring models: multiple inquiries for the same loan type within a short window are often counted as a single inquiry. This is a nuance worth understanding before you apply broadly. For a fuller picture of common misunderstandings around this topic, see common credit score myths that are worth correcting.