Some of the most repeated credit advice is exactly backwards. Here's what actually moves your score, based on how FICO and VantageScore models are actually built.
Myth: closing a card you don't use helps your score
The opposite is usually true. Closing a card reduces your total available credit, which raises your credit utilization ratio (the percentage of available credit you're using) even if your spending hasn't changed. It can also shorten your average account age over time once that account ages out of your history. Unless the card has an annual fee you don't want to pay, an unused card sitting open with a zero balance is quietly helping your score, not hurting it.
Myth: checking your own credit score hurts it
Checking your own score is a "soft inquiry" and has zero effect on your score, no matter how often you do it. What actually affects your score is a "hard inquiry" — when a lender checks your credit because you applied for new credit. Confusing the two leads people to avoid monitoring their own credit, which is exactly the wrong instinct; regular self-checks help you catch errors and fraud early.
Myth: you should carry a small balance to "build credit"
Carrying a balance and paying interest does nothing extra for your score compared to paying your statement balance in full every month. Scoring models look at your reported utilization at the time your issuer reports to the bureaus, not whether you carried interest. Paying in full every month builds the exact same credit history at zero cost, versus paying interest for no scoring benefit.
The utilization detail that trips people up: your score can look worse right before a big purchase even if you pay it off immediately after, because issuers typically report your balance on your statement closing date, not after you pay it. If you're about to apply for a mortgage or auto loan, pay down balances before your statement closes, not just before the due date.
Myth: all types of credit inquiries and accounts affect your score equally
They don't. Payment history (35% in the FICO model) and utilization (30%) dominate the score. Length of credit history, new credit, and credit mix each make up meaningfully smaller shares. A single missed payment can do more damage than several hard inquiries combined — prioritize on-time payments over obsessing about inquiry counts.
What actually moves the needle, ranked
- Never miss a payment — set up at least the minimum on autopay as a backstop.
- Keep utilization under 30% of your total available credit, ideally under 10% for the best tier.
- Keep old accounts open and in occasional light use so they don't get closed for inactivity.
- Only apply for new credit when you actually need it — each hard inquiry has a small, temporary effect.