What Actually Affects Your Credit Score (And What's Just Noise)

You've probably heard some version of every one of these:

• "Never close a credit card."
• "Checking your score hurts your score."
• "Carrying a small balance helps your credit."
• "You need to use your card every month or it'll close."

Some of these are true. Some used to be true. One of them is actively bad advice that can cost you money. The problem is that credit scoring feels opaque enough that people repeat what they've heard rather than what actually moves the number.

Here's what genuinely affects your FICO score in 2026, in the order of how much weight each factor actually carries.

The five factors, and how much each one actually matters

Your FICO score — the model most lenders actually pull, even if the free score in your banking app is a different model called VantageScore — is built from five weighted ingredients:

Payment history — 35%. By far the single biggest factor. This is simply whether you've paid what you owed, on time, across every account that reports to the bureaus. <cite index="9-1">This carries the most weight of any factor, and missing even one payment has an outsized negative effect, particularly on higher scores.</cite> A single 30-day late payment can knock a good score down dramatically — <cite index="7-1">a borrower at 720 can lose 90 to 110 points from one missed payment, and recovery typically takes 9 to 12 months of clean history afterward.</cite>

Amounts owed / credit utilization — 30%. This is how much of your available revolving credit (credit cards, mainly) you're actually using. <cite index="9-1">Utilization ideally stays below 30%, though most credit experts recommend staying below 10% for the best possible scoring impact.</cite> This is the factor most people misunderstand, so it gets its own section below.

Length of credit history — 15%. How long you've had credit, on average, across all your accounts. This is the factor "never close your oldest card" advice is trying to protect — and it's legitimate advice, just for the wrong stated reason (more on that below).

New credit — 10%. How many accounts you've opened recently, and how many hard inquiries have hit your report. One hard inquiry has a small, short-lived impact. Several in a short window — like shopping for multiple credit cards at once — adds up.

Credit mix — 10%. Whether you have a mix of credit types (a card, a car loan, a mortgage) versus only one type. This is the smallest factor and not worth engineering your finances around.

(Figures above from FICO's published 2026 scoring model weights.)

The myths, sorted into true, outdated, and wrong

"Checking your own score hurts it" — false. Checking your own score is a "soft inquiry" and has zero impact. Only "hard inquiries" — when a lender pulls your report because you applied for credit — have any effect, and even that impact is small and temporary.

"Never close your oldest card" — mostly true, but for a specific reason. Closing a card can shorten your average account age (hurting the 15% length-of-history factor) and — this is the bigger one — it reduces your total available credit, which can spike your utilization percentage even if your spending hasn't changed. If you're going to close a card, understand it's the utilization math that usually does the damage, not some vague "history" penalty.

"Carrying a small balance helps your score" — false, and costs you money. This is the one piece of bad advice that actively hurts people. Paying your statement in full every month does not hurt your score — it's the healthiest possible utilization pattern, and it means you pay zero interest. There's no scoring benefit to carrying a balance and paying interest on purpose.

"You need to use a card every month or it'll get closed" — true, but for a boring reason. This isn't a credit-scoring rule — it's a bank risk-management rule. Card issuers do close accounts for long-term inactivity, which then can hurt your utilization and history factors indirectly. Using a card for one small recurring bill (a streaming subscription, for example) and auto-paying it off is enough to keep it active.

The one number worth actually watching

If you only track one thing from this whole list, track your utilization percentage — the sum of your credit card balances divided by your total credit limits, checked right before your statement closing date (not necessarily on payday). It's the factor that moves the most and the fastest, in either direction, and it's the one most people can influence within a single billing cycle just by timing a payment differently.

Everything else on this list — payment history, length of history, new credit, credit mix — moves slowly and rewards patience. Utilization is the lever you can actually pull this month.