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Your credit score is a 3-digit number that lenders use to decide whether to loan you money and at what interest rate.
Your credit score is a 3-digit number that lenders use to decide whether to loan you money and at what interest rate. Understanding it can save you tens of thousands of dollars over your lifetime.
FICO stands for Fair Isaac Corporation — the company that created the most widely-used credit scoring model. Your FICO score ranges from 300 to 850. Higher is better. 90% of top lenders use FICO scores when making lending decisions.
You actually have multiple FICO scores — one from each of the three major credit bureaus (Equifax, Experian, TransUnion). They're usually similar but can vary based on which bureau a lender reports to.
| Score Range | Rating | What It Means |
|---|---|---|
| 800-850 | Exceptional | Best rates on everything |
| 740-799 | Very Good | Near-best rates |
| 670-739 | Good | Most lenders approve you |
| 580-669 | Fair | Higher rates, fewer options |
| 300-579 | Poor | Likely denied or subprime rates |
FICO calculates your score using exactly five factors, in order of how much they matter.
| Factor | Weight | What It Means | Tip |
|---|---|---|---|
| Payment History | 35% | Do you pay on time? The single biggest factor. Even one missed payment can drop your score 50-100 points | Set up autopay for at least the minimum on every account |
| Credit Utilization | 30% | How much of your available credit you're using. Keep it under 30%, ideally under 10% | Pay your balance before the statement closing date, not just the due date |
| Length of Credit History | 15% | How long your accounts have been open. Older accounts are better | Keep old accounts open even if you rarely use them |
| Credit Mix | 10% | Whether you have a mix of credit types — credit cards, auto loans, mortgage | Don't open accounts just for the mix; let this develop naturally |
| New Credit / Hard Inquiries | 10% | Every credit application adds a hard inquiry | Rate-shop for mortgages/auto loans within 14-45 days — multiple inquiries count as one |
| Type | Examples | Impact |
|---|---|---|
| Hard Inquiries | Applying for a credit card, mortgage, or auto loan; requesting a credit limit increase; private student loan applications | Typically drops score 5-10 points, stays on report 2 years |
| Soft Inquiries | Checking your own credit score, pre-qualification checks, employer background checks, insurance quote inquiries | Zero effect on your score — check freely |
On a $300,000 mortgage over 30 years, a borrower with a 620 score might get a 7.8% rate (~$2,154/month). A borrower with a 760 score gets 6.5% (~$1,896/month). That's a $258/month difference — or $92,880 over the life of the loan. Your credit score is not a vanity number.
Different negative marks recover at different speeds — knowing this helps set realistic expectations instead of expecting an overnight fix.
| Action Taken | Typical Time to See Improvement |
|---|---|
| Paying down high credit card balances | 1-2 billing cycles (utilization updates fast) |
| Consistent on-time payments after a late payment | Several months to fully offset the damage |
| Removing an error via dispute | 30-45 days (bureau investigation window) |
| Recovering from a missed payment | Up to 12+ months for full recovery |
| Recovering from a collections account or bankruptcy | Several years, though impact lessens over time |
Maria had a 760 score and was pre-approved for a mortgage at 6.5%. She missed a credit card payment by 25 days right before closing, unaware it had been reported.
| Event | Impact |
|---|---|
| Score before missed payment | 760 |
| Score after 1 missed payment | ~680 |
| Mortgage rate offered instead | Rose from 6.5% to ~7.2% |
| Extra cost over 30 years on a $300,000 loan | ~$45,000 |
One missed payment, caught right before a major purchase, cost Maria tens of thousands over the life of the loan — exactly why payment history carries the heaviest weight in the formula.
Key Takeaway: Payment history (35%) and utilization (30%) make up 65% of your score — focus here first. Your FICO score affects mortgage rates dramatically: a 620 vs 760 score on a $300K loan can cost $80,000+ extra in interest over 30 years, and even a single missed payment right before a major purchase can cost tens of thousands, as Maria's example shows. Negative items fall off your report after 7 years; bankruptcies after 10.
Most banking apps, Credit Karma, and Experian offer free score access — these are soft inquiries and never hurt your score, so you can check as often as you like.
Not every lender reports to all three bureaus, and each bureau may weigh the data slightly differently, so your Equifax, Experian, and TransUnion scores can vary a bit even though they're all based on similar information.
Most negative items like missed payments and collections fall off after 7 years, while bankruptcies can stay for up to 10 years.
No — FICO treats multiple mortgage or auto loan inquiries within a 14-45 day window as a single inquiry, specifically so you can shop for the best rate without being penalized repeatedly.
Yes, if the primary account holder has a long, positive payment history — being added as an authorized user can extend your own credit history length and improve utilization, even without using the card yourself.
Generally no — closing a card reduces your total available credit (raising utilization) and can shorten your average account age, both of which can lower your score even if the card itself is unused.
Disclaimer: This article is for general educational purposes only and does not constitute personalized financial, investment, tax, or legal advice. Figures, rates, and rules mentioned may change over time — verify current details with an official source or a qualified professional before making financial decisions.