When to refinance your auto loan (and when to skip it)
Three clear signals that refinancing will save you money, and the situations where it's not worth the hassle.
Marcus Thompson
The short answer
Refinance when your credit improved, rates dropped, or your dealer rate was inflated.
You need enough vehicle value, a meaningful APR gap, and a term that doesn't wipe out the savings. Most borrowers save $50-150/month when the conditions are right.
- Look for at least a 1-2 percentage point APR drop.
- Make sure your car still meets lender age and mileage limits.
- Don't extend the term so far that you pay more total interest.
Three signals it's time to refinance
The clearest sign is a better credit score than when you first borrowed. Even a 20-point improvement can unlock meaningfully lower rates — the difference between a 9% and 6% APR on $20,000 is over $1,500 in total interest.
The second signal is that you financed through a dealer at a marked-up rate. Dealers routinely add 1-3 percentage points to the rate they receive from the lender. The third: market rates have dropped since your original loan.
- Your credit score is 20+ points higher than at origination.
- You accepted dealer financing without shopping around first.
- Current market rates are lower than your existing APR.
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How to calculate your savings
Take your remaining balance and multiply by the APR difference, then multiply by your remaining years. That's a rough estimate of your total interest savings. For exact numbers, use a loan amortization calculator.
Example: $18,000 remaining at 9% with 3 years left = $2,592 in remaining interest. Refinancing to 6% = $1,728 in interest. You save $864 — minus any fees. Most auto refis have no origination fee, making the savings straightforward.
What lenders look for
Auto refi lenders evaluate your credit score, the vehicle's value relative to the loan balance (loan-to-value ratio), and the car's age and mileage. If you owe more than the car is worth (negative equity), most lenders won't refinance.
The sweet spot: a credit score above 660, LTV under 120%, vehicle under 7 years old, and at least 12-18 months remaining on your loan. Credit unions are often more flexible on vehicle age and mileage than online lenders.
- Credit score above 660 gets the best rates (580+ is still eligible at many lenders).
- Loan-to-value ratio under 120% (you don't owe more than the car's worth).
- Vehicle typically under 10 years old with fewer than 100,000 miles.
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When refinancing isn't worth it
Skip it if your loan is nearly paid off — if you have less than 12 months or $3,000 remaining, the savings won't justify the paperwork. Also skip it if your car is too old or high-mileage for most lenders to approve.
The biggest trap: extending the term to get a lower payment. If your current loan has 2 years left and you refinance into a 5-year term, your monthly payment drops but your total interest paid can actually increase. Always compare total cost, not just monthly payment.
Ready to check your rate?
Checking auto refi rates uses a soft pull that won't affect your score. Take our 2-minute quiz to see what rates you qualify for based on your vehicle, balance, and credit profile. If the numbers work, you can proceed to a full application.
Frequently asked questions
How much should my rate drop before refinancing?
Can I refinance an older car?
Does refinancing restart my loan?
Article sources
Our articles follow strict editorial guidelines. Sources include:
- We evaluate refinance timing based on APR gap, remaining loan term, vehicle eligibility, and net savings after fees.
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