Updated: May 6, 2026
Key Takeaways
- Your credit score is calculated from five factors: payment history (35%), credit utilization (30%), length of credit history (15%), types of credit (10%), and new credit (10%).
- Payment history is the single biggest lever. One 30-day late payment can drop a good score by 60 to 110 points overnight and take years to fully recover from.
- Credit utilization is the fastest factor you can actually move. Paying down balances before your statement closing date, not your due date, is one of the most underused tactics in personal finance.
- Closing old credit accounts is almost always a mistake. It reduces your available credit and shortens your average account age, two things that hurt your score simultaneously.
- Hard inquiries from new credit applications stay on your report for two years, but their scoring impact fades significantly after 12 months. Rate shopping for mortgages or auto loans within a 14- to 45-day window counts as a single inquiry under FICO scoring models.
A 50-point difference in your credit score can cost you over $100,000 on a 30-year mortgage. That’s not a hypothetical. That’s the actual math on a $400,000 home at a 6.5% rate versus 8%.
Most people treat their credit score like a report card, something that happens to them. The ones who actually move the number treat it like a system with five known inputs. Once you understand those inputs, improving your score stops being a mystery and starts being a project.
Here’s how it actually works.
The Five Credit Score Factors
FICO scores range from 300 to 850 and are built from five categories, each with a different weight.
- Payment History (35%)
- Credit Utilization (30%)
- Length of Credit History (15%)
- Types of Credit (10%)
- New Credit (10%)
The first two factors together account for 65% of your score. That’s where to focus.
Payment History (35%)
Payment history is the most heavily weighted factor because it’s the most direct signal of credit risk. Lenders want to know one thing above everything else: do you pay what you owe, when you owe it?
A single 30-day late payment on an otherwise clean account can drop a good score by 60 to 110 points. The higher your score before the miss, the more it hurts. Collections, charge-offs, and bankruptcies are more severe and can stay on your report for seven to ten years.
The fix is automation. Set every recurring bill: credit cards, utilities, loans: to autopay at least the minimum due. You can always pay more manually. But autopay removes the human error risk of a forgotten payment destroying a score you spent years building.
Late payments do fade over time. A miss from three years ago with consistent on-time payments since reads very differently to a lender than something that happened last quarter.
Credit Utilization (30%)
Credit utilization is the ratio of your current revolving balances to your total available revolving credit. Ten thousand dollars in credit limits with three thousand in balances puts you at 30% utilization.
The widely cited target is under 30%. The reality is that borrowers above 800 typically run utilization in the single digits. Not because they avoid credit, but because they pay down aggressively or carry high limits relative to their spending.
Here’s the thing most people miss: issuers report your balance to the bureaus on your statement closing date, not your payment due date. If you pay in full every month but carry a $2,000 balance when the statement closes, that $2,000 is what Experian, Equifax, and TransUnion see. Paying before the statement closes, not just before the due date, lowers your reported utilization without changing a single spending habit.
Experience Transparency: I had a client in 2019. A physician in her late thirties, excellent income, never missed a payment in her life, who couldn’t get below 720 no matter what she did. She was paying her cards in full every month but doing it three days before the due date. Her reported utilization was sitting at 34% because her statement was closing with a balance every single month. We shifted her payment date to five days before the statement closing date. One billing cycle later her reported utilization dropped to 6%. Her score jumped 44 points in 30 days. Same income, same spending, same cards. Just a different timing on when she paid. That’s the kind of thing that doesn’t show up in the generic credit advice.
Length of Credit History (15%)
Length of credit history covers three things: the age of your oldest account, the age of your newest account, and the average age of all your accounts. Longer is better because it gives lenders more data to evaluate your behavior over time.
The most common mistake here is closing old cards you no longer use. A card you opened 12 years ago and never touch is still working for you. It’s holding up your average account age and your total available credit. Closing it removes both at once.
The exception is high-fee cards that genuinely provide no value. In that case the math might favor closing. But a no-fee card from your twenties that’s just sitting there? Leave it open.
New accounts lower your average account age. That doesn’t mean never open one. It means factor it in before you do.
Types of Credit (10%)
Credit mix covers the variety of credit types in your profile: revolving credit like cards, installment loans like auto loans or mortgages, open accounts like charge cards. FICO rewards variety because it shows you can manage different obligations.
This is the least important factor and should never drive a standalone decision. Don’t take on an auto loan you don’t need to diversify your credit mix. The scoring benefit doesn’t justify the debt.
Where it naturally helps is for borrowers who are credit-averse and only hold one or two cards. A small credit-builder loan from a credit union can move the needle for someone in that position without creating meaningful financial risk.
New Credit (10%)
Every credit application triggers a hard inquiry. Hard inquiries stay on your report for two years but their scoring impact fades significantly after 12 months. A single inquiry is minor, typically a few points.
The problem is multiples. Several applications in a short window signals financial stress to lenders and compounds the scoring impact.
The exception worth knowing: FICO treats multiple inquiries for the same credit type, mortgages, auto loans, student loans, within a 14- to 45-day window as a single inquiry. Rate shopping for a mortgage doesn’t penalize you if you do it within that window.
Checking your own score or report is a soft inquiry. It has zero impact. Check it as often as you want.
Practical Steps to Improve Your Credit Score
Pull your credit reports from all three bureaus: Experian, Equifax, and TransUnion, at AnnualCreditReport.com. Errors are more common than people expect. An inaccurate late payment or a fraudulent account that doesn’t belong to you can be disputed and removed, which produces an immediate score improvement.
Set up autopay for every account. Payment history is 35% of your score. Don’t leave that to memory.
Pay balances before the statement closing date, not just before the due date. That single shift is the fastest legal way to move your utilization number.
Keep old accounts open. The damage from closing a long-standing account almost always outweighs whatever you think you’re gaining.
Apply for new credit deliberately. Multiple applications in a short window compound against you.
Wall Street Reality Check: The credit repair industry exists because complexity creates the impression you need help. You mostly don’t. Pay on time, keep balances low, don’t close old accounts, be selective about new applications. Those four things, done consistently for 18 to 24 months, will put you in the top tier of credit scores from almost any starting point. The firms charging $500 a month to “repair” your credit are doing things you can do yourself for free. The only thing they have that you don’t is time. That’s the one thing they can’t actually speed up.
If you want a deeper resource that goes beyond the basics, I reviewed Credit Secrets in full: including my own results after buying it. It covers advanced dispute strategies and credit-building tactics that go further than a single article can.
Bottom Line
Credit scores aren’t complicated. They’re just misunderstood.
Five factors, two of which account for nearly two-thirds of the result. Get payment history and utilization right and the rest fills in over time. The timing trick on utilization alone, paying before the statement closes instead of before the due date, is something I’ve now explained to more people than I can count. It still surprises almost everyone who hears it.
Start there. The rest is patience.
Updated: May 6, 2026. This article has been fully rewritten with current market context and reflects Jenna Lofton’s 15+ years of experience in financial markets.
Disclaimer: Nothing in this article constitutes financial, legal, or credit advice. Credit scoring models vary by lender and bureau. Always consult a licensed financial professional before making decisions about debt, credit, or personal finances.