Skip to content
What Banks Hide
Tools Guides About
Run the math →
FILE  WBH-CAR-04 SECTION  CALCULATOR DATE  05/14/2026

Calculator

Will refinancing your car loan save you money, or just extend your payments?

Find out if refinancing your car loan actually saves money. Calculate your break-even month, monthly savings, and total interest reduction — in seconds.

REPORT AN ERROR

Calculator

Current Loan

How much you still owe on the car
Principal & interest only
Remaining TermMonths remaining on your current auto loan (1 – 84)

New Loan

New TermTypical auto terms: 24, 36, 48, 60, 72, or 84 months
Lender/title fees (usually $0–$500)
36 mo
Break-even

0.9 yr

11 months
Monthly savings

$26

per month
New payment

$522

per month
Savings over 36 mo

$646

Lifetime savings

$961

Cumulative Savings Over Time

The moment the line crosses zero is when your refi pays for itself.

Total Interest Comparison

Keep Current Loan
Total payments$26,304
Total interest$4,274
Refinance
Total payments$25,343
Total interest$3,043
Refi fees$300
Auto Refinance Break-Even
whatbankshide.com
Break-even0.9 yr
Monthly savings$26
Savings over 36 mo$646
Lifetime savings$961
New payment$522/mo
Embed this calculator on your site →

Paste this into your page:

<iframe id="wbh-auto-refinance" src="https://whatbankshide.com/embed/auto-refinance/" width="100%" height="600" frameborder="0" style="border:none;max-width:100%"></iframe>
<script>window.addEventListener("message",function(e){if(e.origin!=="https://whatbankshide.com")return;if(e.data&&e.data.type==="wbh-embed-resize"){var h=parseInt(e.data.height,10);if(h>0&&h<10000){var el=document.getElementById("wbh-auto-refinance");if(el)el.style.height=h+20+"px"}}});</script>
<p style="font-size:12px;text-align:center;margin-top:8px"><a href="https://whatbankshide.com/tools/auto-refinance/" target="_blank" rel="noopener">Powered by What Banks Hide</a></p>

How it works

Auto refinancing replaces your existing loan with a new one at a lower rate. The savings come from paying less interest each month — but you have to recoup the refi fees first. The break-even month is the exact point where cumulative savings exceed those fees.

We compare two full amortization schedules: your current loan run to maturity versus the new loan. Monthly savings are the difference in P&I payments. Cumulative savings grow linearly (minus the fee lump sum at month 0), crossing zero at break-even. If break-even is beyond your planned hold period, the refi costs you money on net — the calculator flags this clearly.

You might also need

01

Auto Loan Early Payoff

See how much interest you save by making extra payments on your current auto loan

 02

Refinance Break-Even (Mortgage)

The same break-even math applied to home mortgages — closing costs, rate drop, hold period

 03

Lease vs Finance vs Cash

Decide whether leasing, financing, or paying cash wins on net wealth over your hold window

Learn more

?

Frequently asked

01 When does refinancing a car loan actually make sense?
The classic rule of thumb is a rate drop of at least 2 percentage points. But the real test is whether the cumulative monthly savings exceed your refi fees before you plan to sell or trade in the car. Our calculator shows the exact break-even month for your numbers — use the planned hold slider to see if you'll come out ahead.
02 What is a break-even month and why does it matter?
The break-even month is when your total cumulative savings from the lower payment finally surpass the fees you paid to refinance. If you plan to keep the car longer than the break-even point, refinancing saves you money net of fees. If you'll sell the car before break-even, you'll pay fees without recovering them — a losing trade.
03 How much do auto refi fees typically cost?
Auto refinance fees are far lower than mortgage refinance fees. Expect $0 to $500, with most lenders charging a title transfer fee ($50–$150) plus a loan origination fee ($0–$300). Some online lenders charge nothing at all. Compare this to mortgage closing costs of 2–5% of the loan balance — auto refi math is usually much more favorable.
04 Does my old loan have a prepayment penalty I should watch out for?
Many auto loans have no prepayment penalty, but some dealer-arranged financing — especially subprime loans — include one. Check your original loan agreement or call your current lender before refinancing. A prepayment penalty can add hundreds to your effective refi cost, which changes the break-even calculation significantly. Add any penalty to the fees field in the calculator.
05 What credit score do I need to qualify for a better auto rate?
Lenders generally offer their best rates to borrowers with scores above 720–740. Scores between 660 and 720 still qualify for competitive rates, though not the absolute lowest. If your score has improved significantly since you took out the original loan — say, from 620 to 700 — refinancing could cut your rate by 2–4 points even if market rates haven't moved. Pull your free credit report first to know what you're working with.
06 Should I refinance my car loan or use a HELOC?
A HELOC (home equity line of credit) typically carries a lower rate than an auto loan, but it converts unsecured car debt into debt secured by your home. If you can't make payments, the consequence is now foreclosure rather than repossession. For most borrowers, a standard auto refi is the better choice — simpler, no home equity at risk, and competitive rates for good-credit borrowers. A HELOC makes sense only if the rate gap is large, you have significant equity, and you're highly disciplined.
07 Does extending the loan term hurt me even if my payment goes down?
Yes — if you extend the term significantly, you may pay more total interest even with a lower rate. For example, refinancing a 36-month loan at 9% into a 72-month loan at 6.5% lowers your payment substantially but doubles the time you're paying interest on the balance. The calculator shows both monthly savings and lifetime total interest so you can see the full picture, not just the monthly win.