Auto Refinance Calculator 2026
Plug in your current car loan balance, rate, and remaining term — see exactly how much refinancing at todays rates would save you each month and over the life of the loan.
Last updated April 2026 · Sources: Bankrate Q1 2026 auto rate survey, Experian State of the Automotive Finance Market Q4 2025, Federal Reserve G.19
Your refi numbers
Your savings
Common refinance scenarios
How much can you actually save? Here are the savings on a $25,000 balance with 48 months remaining at common rate drops, refinancing into a same-term 48-month loan.
| Old rate → New rate | Old payment | New payment | Monthly save | Lifetime save |
|---|---|---|---|---|
| 12% → 7% | $658 | $599 | $59 | $2,825 |
| 10% → 7% | $634 | $599 | $35 | $1,693 |
| 9.5% → 6.5% | $628 | $593 | $35 | $1,690 |
| 8% → 5.5% | $610 | $582 | $29 | $1,378 |
| 15% → 8% | $695 | $610 | $85 | $4,071 |
All scenarios assume $25,000 balance, 48 months remaining, same-term refinance with no fees. Bigger balances and bigger rate drops produce proportionally larger savings.
Frequently Asked Questions
When does it make sense to refinance a car loan?
When you can drop your interest rate by at least 1-2 percentage points and you plan to keep the car longer than the break-even period. The most common reasons are: your credit score has improved since you bought the car, market rates have dropped, you originally took dealer financing at a high markup, or you want to remove a co-signer. Refinancing usually does not make sense in the last year or two of a loan because there is so little interest left to save.
How much can I actually save by refinancing my car loan?
On a typical $25,000 balance with 48 months remaining, dropping from 9.5% to 6.5% saves about $35/month on a same-term refi or $139/month if you also extend the term to 60 months. Lifetime interest savings on the same-term scenario are around $1,690. The bigger savings come from larger balances and bigger rate drops — borrowers who originally took 12-15% subprime financing can sometimes cut their rate in half after building credit for a year or two.
Should I extend my loan term when refinancing?
Generally no. Extending the term lowers your monthly payment but increases the total interest you pay over the life of the loan. The exception is if you genuinely need cash flow relief and accept the tradeoff. The cleanest refinance keeps the same term or shorter and just captures the rate savings. If you do extend, treat the difference as forced savings — set up an auto-transfer for the old payment amount so the extra goes to investments instead of just disappearing.
Are there fees to refinance a car loan?
Most credit unions and online lenders charge zero application or origination fees. You may pay a small lien transfer fee to your state DMV (typically $5-50) and a title fee to record the new lender. Some states charge a vehicle re-registration fee. Total out-of-pocket fees are usually under $100, which is much lower than the closing costs on a mortgage refinance. There is no appraisal required in most cases.
Will refinancing hurt my credit score?
Briefly, yes. The hard credit inquiry from the new lender drops your score by 5-10 points temporarily. If you rate-shop and submit applications within a 14-day window, the bureaus typically count them as a single inquiry for scoring purposes. The score recovers within a few months as you make on-time payments on the new loan, and the long-term effect is usually positive because the new account adds to your payment history.
How long does it take to refinance a car loan?
Faster than a mortgage refinance — typically 1-2 weeks from application to funding. Online lenders like LightStream, Lending Club, and Credit Union direct can sometimes complete the process in 2-3 days. The new lender pays off your old lender directly. You start making payments to the new lender about 30 days after closing, which usually means you skip a payment in the transition month (the interest still accrues, but the gap can help with cash flow during the switch).
Can I refinance an upside-down car loan?
It is harder but possible. Most lenders cap loan-to-value at 125-130%, meaning they will refinance up to 125-130% of the cars current Kelley Blue Book value. If you owe $20,000 on a car worth $15,000 (133% LTV), you would need to bring at least $1,250 to closing or wait until you pay down the gap. Some credit unions specialize in refinancing underwater auto loans, particularly for members with good payment history.
What credit score do I need to refinance?
Most lenders require at least 580-600 for any refinance offer, but the best rates require 680+. Borrowers with 700+ FICO scores typically qualify for the lowest advertised rates from credit unions. The exact threshold varies by lender — some online auto refi specialists will work with scores in the 550-580 range at higher rates. Pull your credit before applying so you know what to expect.
Should I refinance from a dealer loan?
Often yes. Dealer financing is convenient but the dealer typically marks up the rate by 1-3 percentage points above what the actual lender (often a bank or captive finance company) would offer you directly. Refinancing 6-12 months after the original purchase, after you have established a payment history, is one of the most common ways to save money on dealer-financed loans. Make sure your loan does not have a prepayment penalty before refinancing — most do not, but check the contract.
What is the break-even point on an auto refinance?
Because most auto refis cost under $100 in fees, the break-even point is typically 1-2 months — far faster than a mortgage refinance, which can take 2-5 years. This makes auto refinancing one of the lowest-risk financial moves available. The main risk is not the upfront cost but extending the term and paying more total interest, which is a different kind of trade-off than a mortgage break-even.
How much does my income matter for refinance approval?
Less than for a new auto loan because the lender already has collateral. Most refinance lenders look at your debt-to-income ratio (existing monthly debt obligations divided by gross monthly income) and want it under 40-50%. They will verify income with pay stubs or bank statements. If your income has dropped significantly since the original loan, refinancing can actually be harder than getting the original loan was.
Can I refinance multiple times?
Yes. There is no legal limit on how many times you can refinance an auto loan. Some borrowers refinance twice in the first few years — once after building post-purchase credit, then again when market rates drop significantly. Each refinance requires running the math fresh: are the new monthly savings worth the brief credit score impact and the small fees? Stacking refis is most useful for borrowers who started in subprime territory and have rapidly improved their credit.
Sources: Bankrate Q1 2026 Auto Rate Survey, Experian State of the Automotive Finance Market Q4 2025, Federal Reserve G.19 Consumer Credit, Consumer Financial Protection Bureau guidance on credit inquiries.
Disclaimer: Estimates only. Actual rate offers depend on your credit profile, loan-to-value ratio, vehicle age, and lender. Always compare offers from at least three lenders before refinancing.