See how much you could save by refinancing your auto loan — monthly savings, total interest saved, and break-even point.
Refinancing your car loan replaces your existing loan with a new one — ideally at a lower interest rate, a shorter term, or both. The most common reasons to refinance: your credit score has improved since the original loan, market rates have dropped, or you originally accepted dealer financing without shopping for alternatives.
As a general rule, refinancing is worth pursuing if you can reduce your rate by 1.5% or more. The monthly savings and total interest reduction from that size of a rate drop typically justify the time investment of applying, even with modest refinancing fees. If you can reduce your rate by 3% or more, the case is nearly always compelling.
On a $20,000 remaining balance with 48 months left, dropping from 10% to 6% APR saves about $80/month and nearly $3,800 in total interest over the loan. On a larger balance or higher rate differential, savings compound further. The calculator above shows your specific numbers — use the break-even point to see how quickly the savings outweigh any refinancing fees.
When you refinance, you choose the new loan term. Refinancing into a shorter term than you have remaining increases your monthly payment but reduces total interest more aggressively. Refinancing into the same term keeps payments similar but still saves money if the rate is lower. Refinancing into a longer term reduces monthly payment but may cost more in total interest even at a lower rate — run the numbers carefully before extending your term.
Credit unions consistently offer the most competitive auto refinance rates — often 1–2% lower than traditional banks. Online lenders like LightStream, MyAutoLoan, and RefiJet specialize in auto refinancing and offer quick prequalification. Apply to 2–3 lenders within a 14-day window; multiple auto loan inquiries in this period count as a single hard pull on your credit score under FICO's rate-shopping rules.
Avoid refinancing if you're close to paying off the loan (the interest savings won't justify the effort and fees), if your vehicle is old or high-mileage (some lenders restrict refinancing on vehicles over 7–10 years or 100,000+ miles), or if your current loan has a prepayment penalty that exceeds the savings. Also check that your current lender doesn't charge a payoff penalty before proceeding.