Understanding Your Credit Score: What It Is and How to Improve It
Published Apr 12, 2026 · 7 min read
Your credit score is a three-digit number that determines how much you pay to borrow money — or whether you can borrow at all. A score of 760 versus 660 on a 30-year mortgage can mean $50,000+ in extra interest over the life of the loan. Yet most people have never checked what goes into that number. This guide explains the five factors, shows you how to check your score for free, and gives you a practical plan to raise it.
What Is a Credit Score?
A credit score is a numerical summary of your credit history, designed to predict how likely you are to repay a debt. Lenders, landlords, insurance companies, and even some employers check it. The two main scoring models are:
- FICO Score: Used by 90% of lenders. Range: 300–850. This is the score that matters most for mortgages and auto loans.
- VantageScore: Created by the three credit bureaus (Experian, Equifax, TransUnion). Same 300–850 range. Often the score you see for free on banking apps.
Credit Score Ranges
| Range | Rating | What It Means |
|---|---|---|
| 800–850 | Exceptional | Best rates on everything. Easy approvals. |
| 740–799 | Very Good | Near-best rates. Most products available. |
| 670–739 | Good | Decent rates. Most applications approved. |
| 580–669 | Fair | Subprime rates. Limited options. |
| 300–579 | Poor | High rates or denied. Secured cards only. |
The 5 Factors That Determine Your Score
FICO scores are calculated from five categories, each weighted differently:
1. Payment History (35%)
The single biggest factor. One late payment (30+ days) can drop your score by 60–110 points. The impact fades over time — a late payment from 5 years ago hurts far less than one from last month. Late payments stay on your report for 7 years.
Action: Set up autopay for at least the minimum on every account. Never miss a payment.
2. Credit Utilization (30%)
This measures how much of your available credit you’re using. If you have $10,000 in credit limits and carry $3,000 in balances, your utilization is 30%. Experts recommend keeping it under 30%, and under 10% for the best scores.
Action: Pay down balances. If you can’t, request a credit limit increase (without a hard pull). Both lower your utilization ratio. Use our credit card payoff calculator to plan the paydown.
3. Length of Credit History (15%)
Longer is better. This includes the age of your oldest account, newest account, and average age of all accounts. Closing your oldest card shortens your history and can hurt your score.
Action: Keep old accounts open, even if you rarely use them. Put a small recurring charge on them to prevent closure.
4. Credit Mix (10%)
Scoring models like to see a variety: credit cards (revolving), auto loans, mortgage, student loans (installment). Having only credit cards limits this factor.
Action: Don’t take on unnecessary debt just for the mix. But if you naturally have diverse accounts, it helps.
5. New Credit Inquiries (10%)
Each hard inquiry (from applying for credit) dings your score by 5–10 points. Multiple inquiries in a short period for the same type of loan (mortgage, auto) are grouped into one if within a 14–45 day window.
Action: Don’t apply for multiple credit cards in a short period. Space applications out by at least 6 months.
How Your Credit Score Affects Your Wallet
The interest rate you receive is directly tied to your score. Here’s a real-world example on a $300,000, 30-year fixed mortgage:
| Credit Score | Estimated Rate | Monthly Payment | Total Interest Paid |
|---|---|---|---|
| 760+ | 6.2% | $1,837 | $361,000 |
| 700–759 | 6.6% | $1,918 | $391,000 |
| 660–699 | 7.1% | $2,017 | $426,000 |
| 620–659 | 7.7% | $2,140 | $470,000 |
That’s a $109,000 difference in total interest between a 760 and a 620 score. Use our mortgage calculator to run your own numbers.
How to Check Your Score for Free
- AnnualCreditReport.com: Free credit reports (not scores) from all three bureaus, once per year.
- Your bank or credit card: Most banks now show your FICO or VantageScore for free in their app.
- Credit Karma: Free VantageScore from TransUnion and Equifax.
- Experian: Free FICO Score 8 through their app.
Checking your own score is a “soft pull” and does NOT affect your score. Check it at least once a quarter.
A 6-Month Plan to Raise Your Score
- Month 1: Pull all three credit reports. Dispute any errors (wrong accounts, incorrect balances). Errors affect roughly 1 in 5 people.
- Month 1–2: Set up autopay on all accounts. Pay down the card with the highest utilization first.
- Month 2–3: Request credit limit increases on existing cards (only if they do a soft pull). This instantly lowers utilization.
- Month 3–4: If you have no credit card, open one secured card. Charge a small amount and pay it in full monthly.
- Month 4–6: Continue paying on time, keep utilization under 10%, and avoid new hard inquiries.
Most people see 30–50 points of improvement within 3–6 months using these steps. Larger improvements (100+ points) take 12–18 months.
Common Credit Score Myths
- “Checking my score hurts it.” False. Only hard inquiries (from lenders) affect your score. Checking it yourself is a soft pull.
- “Closing cards improves my score.” Usually the opposite. It reduces available credit (increasing utilization) and shortens credit history.
- “Carrying a balance helps.” Absolutely false. Pay in full every month. The scoring model doesn’t reward you for paying interest.
- “Income affects my score.” No. Credit scores don’t consider income, employment, or savings. Those are separate checks lenders do.
- “All scores are the same.” You have dozens of scores across different models and bureaus. They can vary by 20–40 points.
Credit Score and Borrowing Power
Your credit score is just one part of the equation. Lenders also look at your debt-to-income ratio (DTI). A perfect 850 score won’t help if your DTI is over 50%. For the best loan terms, aim for a 740+ credit score AND a DTI below 36%.
Key Takeaways
- Payment history (35%) and utilization (30%) are the two biggest factors. Focus there first.
- Keep credit card utilization under 30%, ideally under 10%.
- Never miss a payment. Set up autopay.
- Keep old accounts open for credit history length.
- Check your reports annually for errors and dispute them.
- A 100-point higher score can save $50,000+ on a mortgage.