What Is a Good Credit Score, and How Can It Affect Your Interest Rate?

1. Credit score ranges, what the numbers mean

The most widely used credit scoring model in the U.S. is the FICO score, developed by Fair Isaac Corporation. It ranges from 300 to 850. VantageScore is an alternative model developed by the three major credit bureaus, Equifax, Experian, and TransUnion, and uses the same 300–850 range. Most mortgage lenders use FICO; auto lenders and credit card issuers use a mix of both.

You have multiple credit scores, not one. Each bureau may have slightly different information about you, and different scoring models weight factors differently. When a mortgage lender pulls your credit, they typically pull scores from all three bureaus and use the middle score for qualification and pricing. Knowing your approximate range is more useful than obsessing over a single number.

The 740 threshold is significant in mortgage lending because it is the point above which Loan Level Price Adjustments (LLPAs), the rate add-ons that Fannie Mae and Freddie Mac apply based on credit risk, may become smaller. Below 740, each 20-point drop in score typically adds a measurable rate premium. Improving from 680 to 740 before applying for a mortgage may be worth evaluating before purchasing, depending on timeline and market conditions.

2. How score affects your mortgage rate

Mortgage pricing is the most consequential place where credit score matters, because the loan is large, the term is long, and the rate difference compounds over 30 years. The table below uses illustrative rates to show the spread between score tiers on a $300,000 30-year fixed Conventional mortgage. Actual rates shift with market conditions, but the relative spread between tiers is consistent regardless of where the overall rate environment sits.

The borrower with a 620 score pays $384 more every month than the borrower with a 760 score, on the same loan amount under the illustrative assumptions. Over 30 years that is $138,245 in additional interest. That difference shows why improving credit before applying for a major loan can materially affect long-term borrowing cost.

The jump between the 680–699 tier and the 700–759 tier is particularly important, crossing 700 saves approximately $50/month and $18,000 over the life of the loan. Crossing 740 saves another $50/month and $17,000 more. Both may be achievable for some borrowers with focused credit improvement before applying, depending on the starting profile.

Rate estimates above are illustrative. Actual rates vary by lender, market conditions, loan-to-value ratio, and other factors. The rate spread between score tiers is real and consistent, the specific numbers shift with market rates but the relative cost of lower scores remains. Always get quoted rates from multiple lenders for your actual credit profile.

3. How score affects your auto loan rate

Auto loan pricing is more aggressive than mortgage pricing at the lower score tiers. The table below uses illustrative rates to show the spread on a $35,000 vehicle financed over 60 months, the tier structure is consistent across market conditions even as baseline rates move:

A borrower below 600 financing a $35,000 car pays $278 more per month than the best-tier borrower, and $16,700 more in total interest over 5 years. On a $35,000 car that will depreciate to roughly $15,000–$18,000 in 5 years, paying $21,812 in interest means the total cost of the vehicle approaches $57,000. Understanding this before signing a dealer financing agreement is essential.

Dealer financing may include a markup over the rate the lender actually quotes. The dealer earns a fee for placing the loan, which is built into the rate you see on the contract. Getting pre-approved by a bank or credit union before visiting a dealership gives you a rate to negotiate against, and can help reveal whether dealer financing is competitive for the borrower’s profile.

4. Credit cards and personal loans

Credit cards

Credit card APR is determined at account opening based on your credit profile at that time. Unlike mortgage and auto loan rates, card APRs generally do not automatically adjust as your score improves, unless you request a rate review or open a new card. The spread between excellent and poor credit on a $5,000 balance is approximately $49/month in interest charges: $74/month at 17.99% (excellent) versus $123/month at 29.99% (poor). Over a year carrying that balance, the difference is $590 in additional interest cost.

Personal loans

Personal loan rates vary widely by lender and credit tier. On a $15,000 loan over 36 months, a borrower at 8.99% (750+ score) pays $2,169 in total interest. A borrower at 27.99% (600–649 score) pays $7,333, $5,164 more for the same $15,000. Personal loans are often used for debt consolidation, where the goal is to reduce the interest rate being paid on credit card balances. If your credit score is in the poor tier, the personal loan rate may not be low enough to produce meaningful savings over the cards being consolidated, making score improvement before applying strategically important.

5. How a credit score is built

FICO scores are calculated from five categories of information in your credit report, each weighted differently:

• Payment history, 35%. Whether you pay on time, every time. This is the single largest factor. One 30-day late payment can drop a score by 60–110 points depending on the starting score and credit history length. Payments more than 90 days late cause greater damage and stay on the credit report for seven years.
• Amounts owed (credit utilization), 30%. How much of your available revolving credit you are using. Using $3,000 of a $10,000 credit limit is 30% utilization. Most credit professionals recommend staying below 30%, and ideally below 10%, to maximize this component. High utilization may signal higher risk even if all payments are on time.
• Length of credit history, 15%. How long your accounts have been open. Average account age matters; closing old accounts shortens it. This is why closing a paid-off credit card can sometimes hurt a score even though the balance is zero.
• New credit, 10%. Recent hard inquiries from new credit applications. Each hard inquiry may temporarily reduce a score by a few points. Multiple mortgage or auto loan inquiries within a short window (typically 14–45 days) are typically counted as a single inquiry for scoring purposes, rate shopping is not penalized the same way as opening multiple new credit cards.
• Credit mix, 10%. Having a variety of credit types, revolving credit (cards), installment loans (auto, mortgage, personal) , is viewed positively. This factor is minor and should not drive decisions; opening new accounts purely to diversify credit mix is often not worth the hard inquiry and new account age impact.

6. What damages a score, and by how much

Understanding what hurts a score is as important as knowing what builds it. Some damage is temporary and recoverable quickly. Some persists for years. The approximate impact of common negative events can vary, but for a score starting around 780, examples may look like this:

• 30-day late payment: −60 to −110 points. Recovers over 12–24 months of clean history.
• 90-day late payment: −90 to −150 points. Stays on report 7 years; impact fades after 2–3 years of clean history.
• Maxing out a credit card (100% utilization): −25 to −45 points. Recovers immediately when the balance is paid down.
• Closing an old credit card: −5 to −25 points (depends on how much it shortens average account age and reduces total available credit).
• Applying for new credit (hard inquiry): −5 to −10 points per inquiry. Recovers within 12 months.
• Collections account: −50 to −125 points. Stays on report 7 years.
• Bankruptcy (Chapter 7): −130 to −240 points. Stays on report 10 years.

Scores starting lower than 780 may be affected less dramatically by some negative events because the score is already lower. The same late payment that drops a 780 to 680 may only drop a 650 to 600. This is not an argument for having a low score; it is context for why protecting a strong score can matter significantly.

7. How to improve your score before borrowing

Pay down revolving balances, fastest impact

Reducing credit card utilization is often one of the fastest levers available for score improvement. Unlike payment history, which takes months to rebuild, utilization is recalculated every billing cycle. Paying a $4,000 balance down to $1,000 on a $10,000 limit card, dropping utilization from 40% to 10%, may improve a score within one or more billing cycles. If you are planning to apply for a mortgage or car loan in 60–90 days, paying down card balances is one of the most efficient actions available.

Do not close old accounts

A paid-off credit card with a long history and a zero balance can be helpful to your score. It increases your total available credit (lowering overall utilization) and contributes to average account age. Closing it removes both benefits. In many cases, keeping old accounts open, using them occasionally for small purchases, and paying the balance in full each month can help preserve account history and available credit.

Make all payments on time, no exceptions

Payment history is a major scoring factor and can be one of the slower areas to recover from after damage. If you have missed payments in the past, one of the most important things you can do is establish a consistent on-time record going forward. After 12 months of clean history, the impact of older late payments begins to fade. After 24 months, the improvement may be substantial depending on the full credit profile.

Do not apply for new credit before a major loan

Each new credit application creates a hard inquiry and opens a new account, both of which can temporarily lower your score. In the 6–12 months before applying for a mortgage or major auto loan, avoid opening new credit cards, financing new purchases, or applying for any other credit products. The small short-term impact of each inquiry can be meaningful when you are trying to clear a score threshold.

Check your credit report for errors

Errors can appear on credit reports, so review is worthwhile. Federal law gives you the right to a free credit report from each of the three major bureaus annually through AnnualCreditReport.com. Common errors include accounts that do not belong to you, incorrect late payment records, balances reported higher than they actually are, and accounts that should have been removed after 7 years. Disputing and correcting errors may improve a score and usually costs nothing but time.

8. Frequently asked questions

What is considered a good credit score?

Many lenders consider scores in the 670 to 739 range good, while higher scores may qualify for more competitive pricing. Exact cutoffs vary by lender and scoring model.

Does a higher credit score always mean a lower interest rate?

A higher credit score can help borrowers qualify for better rates, but lenders also consider income, debt-to-income ratio, down payment, loan-to-value ratio, and market conditions.

Which credit score do mortgage lenders use?

Mortgage lenders commonly review credit information from the major credit bureaus and often use a middle score for qualification and pricing, depending on the loan program.

What can improve a credit score before borrowing?

Paying on time, reducing credit card utilization, avoiding new credit applications before a major loan, and correcting credit report errors may help improve a credit profile.

Can one late payment hurt a credit score?

A late payment can negatively affect a credit score, especially once it is reported as 30 days late or more. The impact depends on the existing credit profile and payment history.