Auto Refinance Savings Calculator
Compare your current auto loan APR against a refinance rate and see exactly how much you’ll save over the remaining life of the loan. Refinancing is free, takes 10 minutes online, and often saves $50–150 per month on cars under 5 years old.
Refinance Auto Loan
Compare your current loan with a refinance offer including fees.
How It Works
Refinancing replaces your existing loan with a new one at a lower APR. The new lender pays off the old lender directly. Your monthly payment drops, the total interest paid drops, and the loan term can stay the same or shorten.
How to Use This Calculator
- Find your current APR and the remaining balance (call your lender or check the most recent statement).
- Get pre-approved at 2–3 lenders — credit unions and online lenders like LightStream and Capital One are the best starting point.
- Enter old APR, remaining balance, remaining months, and the new offered APR.
- The calculator returns monthly savings and total lifetime savings.
- Accept the offer with the lowest APR — don’t pay any “loan fees” or “doc fees” higher than $50.
Worked Example
Reference Table
Decision matrix for auto loan refinancing. Most lenders require at least 6 months on the original loan before refinancing.
| Scenario | Worth refinancing? |
|---|---|
| APR drop ≥ 2 percentage points | Yes — strong savings |
| APR drop 1–2 points | Maybe — check fees and remaining term |
| APR drop under 1 point | Probably not — savings barely cover effort |
| Less than 12 months remaining | No — too little interest left to save |
| Credit score improved 50+ pts | Yes — even at same listed APR, your offer beats current |
| Underwater on the loan (LTV>100%) | No — most lenders won’t refinance |
| Want to extend term | Possible, but raises total interest |
Frequently Asked Questions
Are there fees to refinance an auto loan?
Usually no. Most US auto refinance lenders charge $0 — no origination, no application, no doc fees. If a lender wants more than $50, find a different one.
Does refinancing hurt my credit?
Mildly. Each application triggers a hard pull (5–10 point drop, recovers in 3–4 months). Shop multiple lenders within 14 days and the credit bureaus count them as one inquiry.
Can I refinance if I’m underwater on the loan?
Rarely. Most lenders cap loan-to-value (LTV) at 110–130%. If you owe more than that, you’ll need to pay down the difference first. Some online lenders go to 135% LTV — shop around.
Should I refinance to a longer term to lower my payment?
Only if cash flow is critical. Extending the term raises total interest paid. A better path: refinance to a shorter term at the lower APR and keep the same payment — you pay off the loan sooner.
How long does refinancing take?
Online: 10 minutes to apply, 1–3 business days to fund. The new lender pays off your old loan directly. Your old account closes automatically.
