Your credit score affects the interest rates you pay, the apartments you can rent, and sometimes whether you get hired. Tanking it is easy. Fixing it takes months or years. These six mistakes are the most common reasons people damage their scores without realizing it.
1. Maxing out your credit limit
Credit utilization, the percentage of available credit you’re using, accounts for roughly 30% of your FICO score. Using more than 30% of your total limit starts dragging your score down. Using more than 50% drops it hard. Maxing out a card can knock 50 to 100 points off your score almost overnight.
It doesn’t matter if you plan to pay it off at the end of the month. Your balance gets reported to the credit bureaus on your statement closing date, not your payment due date. So if your $5,000 limit card shows a $4,800 balance on statement day, that’s what the bureaus see.
The fix: keep balances below 30% of each card’s limit. If you need to make a large purchase, pay part of it before the statement closes. Some people make mid-cycle payments specifically to keep reported balances low.
2. Closing old credit cards
This one catches people off guard. You pay off an old card, feel proud, and close the account. Your score drops. Why? Two reasons.
First, closing a card reduces your total available credit, which raises your utilization ratio. If you have two cards with $5,000 limits each and a $3,000 total balance, your utilization is 30%. Close one card and that same $3,000 balance on a $5,000 limit jumps to 60%.
Second, the age of your credit accounts matters. Older accounts help your score. Closing your oldest card shortens your average account age, which can ding your score further.
Better approach: if the card has no annual fee, keep it open and use it for a small recurring charge (like a streaming subscription) with autopay. If it has an annual fee you don’t want to pay, call and ask to downgrade to a no-fee version of the same card. Most issuers will do this, and it preserves your account history.
3. Late payments, even by one day
Payment history makes up 35% of your credit score, the single largest factor. A payment reported as 30 days late can drop your score by 90 to 110 points if you had excellent credit. The damage lasts up to seven years on your credit report, though the impact fades over time.
Most credit cards don’t report a late payment to the bureaus until it’s 30 days past due. So if you miss by a few days, you’ll pay a late fee but your credit score may survive. That said, relying on this buffer is risky. Set up autopay for at least the minimum payment on every card you have. You can still manually pay more, but autopay prevents the catastrophic scenario.
If you do get a late payment reported, call the card issuer and ask for a goodwill adjustment, especially if it’s your first time. Some will remove it. Not all. But it costs nothing to ask.
4. Applying for too many cards at once
Every credit card application triggers a hard inquiry on your credit report. Each inquiry typically drops your score by 5 to 10 points. The impact fades within a year and falls off entirely after two years.
One application is fine. But applying for four or five cards in a month signals to lenders that you might be in financial trouble and desperately seeking credit. It can also result in multiple denials, which don’t directly hurt your score but waste hard inquiries.
Space applications out. Two to three months between cards is a reasonable pace if you’re building a rewards strategy. And always check whether you’re likely to be approved before applying. Most issuers have pre-qualification tools that use a soft pull (no score impact) to give you an idea.
5. Only paying the minimum
Paying the minimum keeps your account in good standing and avoids late payment marks. But it does nothing to help your score beyond that. If your balances stay high month after month, your utilization ratio remains elevated and your score stays suppressed.
Minimum payments also keep you trapped in an interest cycle. On a $5,000 balance at 22% APR, paying the minimum means you’re mostly covering interest. The principal barely moves. Two years of minimum payments might reduce your balance to $4,200 while you’ve paid $3,000. Most of that went to the bank, not to your debt.
Paying more than the minimum is one of the few actions that improves your score and saves you real money simultaneously.
6. Ignoring your credit report
About one in five credit reports contains an error, according to the FTC. Errors range from wrong account balances to accounts that aren’t yours to paid debts still showing as delinquent. Each of these can unfairly lower your score.
You can pull your credit report for free once a year from each of the three bureaus through AnnualCreditReport.com. Many banks and apps also show updated FICO scores monthly.
Check your report at least once a year. If something looks wrong, dispute it directly with the bureau. The process is free and usually handled online. Correcting errors can produce an immediate score bump, sometimes a significant one.
The takeaway
Credit score damage is usually self-inflicted and almost always avoidable. Keep balances low, pay on time, don’t close old accounts without reason, and check your report annually. These habits won’t make you rich, but they’ll keep your borrowing costs low and your options open when you need them.