What Hurts Your Credit Score the Most (And How to Stop It)

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Impact: Severe — 35% of Score

A Missed Payment

Payment history is the single biggest lever on your score — 35% of the whole calculation. One payment, 30 days late, can knock 90 to 110 points off a score that was sitting near-perfect. Cruelly, the better your score going in, the harder it falls — the model simply has more room to revise you downward when it’s never seen you slip before. Late payments typically stay on your report for seven years, though the sting fades as they age. The fix isn’t complicated: autopay the minimum on every single account, today, before you finish reading this.

Not sure what your minimum payments are actually costing you long term? The Minimum Payment Trap Calculator shows the real interest cost behind paying just the minimum, so autopay doesn’t quietly become a trap of its own.

Impact: High — 30% of Score

Maxing Out a Card

A $5,000 limit with a $4,000 balance is 80% utilisation. Nothing else needs to go wrong for that number alone to drag your score down hard. Lenders want to see it under 30%. Under 10% is the sweet spot. You don’t need a zero balance — you just can’t look like you’re leaning on every dollar of credit you’ve been given, because that’s exactly what signals financial stress to a scoring model.

Here’s what most people miss: scoring models check both numbers, not just one. Your overall utilisation across every card matters, but so does each individual card’s ratio. Maxing out one $5,000 card at $4,900 still costs you real points even if three other cards sit at $0 — a scoring model doesn’t average it away.

If you’re juggling balances across a few cards and genuinely don’t know your real number, run it through our free Credit Utilisation Calculator — it’ll show your overall ratio, a per-card breakdown, and exactly what to pay down to land under 30% or 10%.

Pro Tip: Your Statement Date Matters More Than Your Due Date

Card issuers report your balance to the bureaus on your statement closing date — not the day your payment is due. Pay your bill in full every month by the due date and you can still show up as high-utilisation, because the bureaus already saw the number weeks earlier. Pay your balance down a few days before your statement closes instead (or make a second payment mid-cycle), and the lower number is what actually gets reported.

Impact: Medium-High — 15% of Score

Closing an Old Account (and why the common advice about it is half-wrong)

Here’s the part almost every article gets wrong: for your FICO score, closing an old card does not shorten your average account age the moment you close it. Accounts closed in good standing stay on your credit report for up to 10 years and keep aging the entire time, contributing to your average age exactly as if they were still open. The damage that actually hits immediately is utilisation: close a card and its credit limit vanishes from your total, so whatever balances remain elsewhere instantly represent a bigger slice of what’s left.

One catch worth knowing: that 10-year grace period is a FICO rule. VantageScore, the model behind most free credit-monitoring apps, can drop closed accounts out of its average-age calculation right away — so a free app might show your credit age taking an immediate hit even though the FICO score a mortgage lender actually pulls hasn’t moved on that front at all.

The real cost shows up later — the day that closed account finally ages off your report after those 10 years, if it was one of your oldest, your average age can drop noticeably all at once. If there’s a card from years back sitting in a drawer with no annual fee, leave it open. Put one small recurring charge on it every few months and pay it off immediately.

Impact: Medium — 10% of Score

Applying for Too Much, Too Fast

Every application — a card, a loan, car finance — triggers a hard inquiry. FICO says a single hard inquiry usually costs fewer than 5 points for most people, though it can run higher — sometimes into double digits — if your file is thin or your score is already under pressure. Stack five applications in a short window and even the smaller hits add up fast.

The damage doesn’t last as long as people assume, though: a hard inquiry sits on your report for 24 months, but it only counts against your FICO score for the first 12. After that, it’s still visible to a lender pulling your file — it just stops costing you points. Only apply when you actually need the credit, and check eligibility through a soft-inquiry pre-qualification tool first so you’re not gambling points on a maybe.

Impact: Medium — 10% of Score

Only Ever Having One Type of Credit

Lenders like proof you can handle different kinds of credit responsibly — a card, an instalment loan, car finance. A single credit type caps how high your score can climb. This is the smallest factor on the list, so don’t go opening accounts purely to diversify. But if you’re already managing a mix well, that’s quietly working in your favour more than most people realise.

Impact: Severe — Stays Up to 10 Years

Collections, Charge-Offs, Bankruptcy

A debt sent to collections is one of the worst things that can land on your report. A charge-off — where a lender writes your balance off as a loss — isn’t far behind it. Bankruptcy is the nuclear option: Chapter 7 can stay on your file for up to 10 years, and either can cost 100 points or more on impact. Chapter 13 is commonly cited at 7 years — that’s standard bureau practice, not a hard legal cap, since the Fair Credit Reporting Act technically permits reporting for up to 10 years, so don’t assume every Chapter 13 clears on schedule.

Medical debt is a real exception, but not a legal one. A federal rule that would have banned medical debt from credit reports entirely was finalised by the CFPB in January 2025 and then vacated by a Texas federal court in July 2025 — so there’s currently no nationwide ban. What does still apply is voluntary policy the three bureaus adopted back in 2022–2023 and haven’t reversed: paid medical collections are removed regardless of the amount, unpaid medical debt under $500 isn’t reported at all, and any medical debt has to sit unpaid for a full year — not the old six months — before it can appear on your file at all. Since these are bureau policies rather than law, they could change again; a handful of states have passed their own bans that go further, so it’s worth checking your state specifically if medical debt is what’s dragging your score down. None of this is permanent damage in the sense of never recovering — it just takes time and clean history layered on top before the weight of it starts to lift.

Impact: Varies — Often Overlooked

Someone Else’s Debt: Co-Signing and Authorized Users

Co-signing a loan for a family member makes you legally responsible for every payment on it — if they pay 30 days late, that hits your report with the same severity as if you’d missed it yourself, and the full balance counts toward your own debt load. Most people co-sign thinking of it as a favour with no real downside. It isn’t. Read the full repayment terms before you sign anything, and treat it as though the debt were entirely yours, because to your credit file, it is.

Being added as an authorized user works the same way in reverse: their account history becomes part of your file too. Added to a card with high utilisation or late payments, it can drag your score down through no fault of your own. Added to a well-managed, long-standing card, it’s one of the fastest legitimate ways to build history — which cuts both ways if you’re the one adding someone else.

Impact: Hidden Damage

An Error Nobody Caught

A Federal Trade Commission study found that one in five consumers had an error corrected on at least one of their three credit reports — an account that isn’t theirs, a payment marked late that wasn’t, a balance that’s just wrong. If that’s you, your score is being punished for something that never actually happened. Pull your free report at AnnualCreditReport.com and dispute anything inaccurate. For most people, this is the single fastest free fix on this entire list.

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💡 Utilisation and errors are the two fastest wins on this list — both can move your score within a single billing cycle. Everything else takes longer, but these two don’t have to.

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Okay but seriously, what’s the ONE thing that hurts the most?

A missed payment. It’s 35% of your FICO score on its own, and a single 30-day-late payment can cost a high score 90 to 110 points. If you only fix one thing after reading this, set up autopay.

Wait, does checking my own score hurt it?

No, and this trips people up constantly. Checking your own score is a soft inquiry — zero impact. Only a hard inquiry, where a lender pulls your file for an actual application, can cost you points. Check your score as often as you like.

How fast can my score actually drop?

Faster than people expect. A missed payment can hit your report at the 30-day mark and the score impact follows almost immediately. Utilisation moves every billing cycle, so running up a balance can dent your score within a month, not a year.

I want to close a card I never use — bad idea?

For your FICO score, no — closed accounts in good standing keep aging on your report for up to 10 years. What hits immediately is utilisation: you lose that card’s credit limit, and your remaining balances instantly represent a bigger share of what’s left. One nuance: free apps using VantageScore may show your average credit age drop right away, even though the FICO score a lender actually pulls hasn’t moved on that front. Unless it’s costing you an annual fee you can’t justify, leaving it open and dormant usually helps more than closing it.

How long until a bad mark actually falls off?

Most negative items — late payments, collections, charge-offs, Chapter 13 — are typically reported for 7 years, though that’s standard bureau practice rather than a fixed legal ceiling; the FCRA technically allows up to 10. Chapter 7 bankruptcy can run the full 10 years. The real relief comes sooner than that, though, since the impact fades steadily as you build positive history alongside it.

Does requesting a credit limit increase hurt my score?

It depends entirely on your issuer. Some run a hard inquiry when you request more credit, costing you a few temporary points. Others use a soft inquiry, which costs nothing at all. Call your card issuer and ask before you request one — it takes a minute and tells you exactly what’s actually at stake.

Does getting declined for a card hurt my score more than getting approved?

No — the hard inquiry lands the moment you apply, before the lender even decides. Approval or denial doesn’t pile on extra damage. The real risk is applying again right away after a denial, which stacks a second inquiry on top of the first instead of giving your score time to recover.

Will refinancing hurt my score?

There’s a hard inquiry either way, but if you shop several lenders within a focused window — 14 to 45 days depending on the scoring model — they typically get counted as a single inquiry instead of several. Closing the old loan can shorten your credit history very slightly, but it’s a minor factor compared to the inquiry itself.

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