Your credit score is the first thing a lender looks at when you apply to refinance a car loan. It determines whether you qualify at all, which rate tier you land in, and ultimately how much you save. Understanding exactly where your score sits and what that means for refinancing is the starting point for any serious refinance decision.
The Short Answer
Most lenders offering competitive rates want a credit score of at least 660. That puts you in the prime tier, where rates start becoming meaningfully lower than what dealerships typically offer. Below 660 you can still refinance, but your lender options narrow and rates go up.
Above 720 you are in the best tier most lenders offer. Above 780 you qualify for super-prime rates, which are the lowest available in the market.
Credit Score Tiers for Auto Loan Refinancing
Lenders group borrowers into tiers and set rate ranges for each. The exact cutoffs vary by lender but these ranges reflect what most banks, credit unions, and online lenders use:
| Credit Tier | Score Range | Typical Refinance APR | Lender Availability |
| Super Prime | 781 and above | 4.5% to 5.5% | All lenders |
| Prime | 661 to 780 | 5.5% to 7.5% | Most lenders |
| Near Prime | 601 to 660 | 7.5% to 11.0% | Some lenders |
| Subprime | 501 to 600 | 11.0% to 16.0% | Specialist lenders |
| Deep Subprime | 500 and below | 16.0%+ | Very limited |
The difference between prime and super prime on a $20,000 refinance over 48 months can be $400 to $600 in total interest. Moving from near prime to prime can save $1,500 or more.
What Score Do You Actually Need?
The answer depends on what you are trying to accomplish.
If your goal is the lowest possible rate
Aim for 720 or above before applying. At that score most lenders will offer their best available rate without additional conditions. Applying at 680 versus 720 can mean a 1 to 2 point difference in APR with many lenders.
If your goal is approval with reasonable terms
A score of 660 to 719 gets you approved with most mainstream lenders including credit unions and online lenders. The rate will not be the rock-bottom tier but it will likely still be better than a dealership-financed loan from a few years ago.
If your score is below 660
You can still refinance but you need to be realistic. Near-prime lenders exist specifically for this range and some credit unions are more flexible than banks on minimum score requirements. The savings will be smaller and you should run the breakeven calculation carefully before committing.
Does Checking Your Rate Hurt Your Credit Score?
A soft pre-qualification check does not affect your score at all. Most online lenders offer this as a first step, showing you an estimated rate without any impact to your credit file.
A hard inquiry, which happens when you submit a full application, typically causes a 3 to 5 point temporary dip. It recovers within 3 to 6 months of on-time payments. If you apply to multiple lenders within a 14-day window, most credit scoring models count all of those inquiries as a single hard pull.
What If Your Score Has Improved Since You Financed?
This is the most common reason refinancing makes financial sense. If you financed at the dealership with a 620 score and your score has since risen to 680 or higher, you may now qualify for a meaningfully lower rate tier.
A 50-point improvement from 620 to 670 can translate to a 3 to 4 percentage point reduction in APR with many lenders. On a $22,000 loan with 36 months remaining that is roughly $1,200 in total interest.
How to Check Your Score Before Applying
Pull your score from all three bureaus before shopping. Lenders may use Equifax, Experian, or TransUnion, and scores can vary between them. If one bureau has an error dragging your score down, disputing it before you apply can make a significant difference.
Free options include your bank or credit card app, AnnualCreditReport.com for full reports, and Credit Karma for ongoing monitoring. These are soft checks and do not affect your score.
How to Improve Your Score Before Refinancing
If your score is close to a tier boundary, a few weeks of targeted effort can push you over:
- Pay down credit card balances. Credit utilization makes up roughly 30% of your score. Getting below 30% utilization on each card has an immediate effect when the balance reports.
- Do not open new accounts. New accounts lower your average account age and add hard inquiries. Avoid both for 60 days before applying.
- Dispute errors. Check all three bureaus for incorrect late payments, accounts that are not yours, or balances that have already been paid off.
- Keep existing accounts open. Closing old cards reduces your available credit and raises utilization. Leave them open even if unused.
| Use the Auto Loan Refinance Calculator to see how much a rate reduction from your current tier to the next tier would save you in total interest. |
The Bottom Line
A 660 score gets you in the door. A 720 score gets you the best rates. If your score has risen since you originally financed the car, there is a real chance refinancing will save you money. Run the numbers before assuming either way.
For the full breakdown of what lenders check beyond your credit score, including LTV, DTI, and vehicle eligibility, see the Loan Requirements page.
Marcus J. Holloway is a Senior Auto Finance Analyst with 14 years of experience in consumer auto lending and refinance strategy. He reviews all calculator tools and educational content on this site for mathematical accuracy. B.S. Finance, University of Texas at Austin.