Auto Refinance Calculator

Compare payment savings with fees and total remaining borrowing cost.

Monthly savings

$47

Break-even: 7 months

Current payment$634

New payment$587

Current remaining interest$5,435

New interest$3,182

Lifetime savings$1,953

A longer new term can lower payment while increasing total cost. Excludes title, registration, lender conditions, add-ons, and vehicle-value limits unless entered as fees.

Both paths assume fixed-rate monthly amortization. Vehicle eligibility, loan-to-value, title fees, and lender requirements are excluded.

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Planning guide

Read the complete guide →

Understand this estimate before using it

Quick answer

What does the Auto Refinance Calculator do?

Compare payments, interest, fees, break-even, and savings. It compares current and replacement auto-loan amortization, including fees, payment change, interest, break-even, and holding-period savings.

Formula and calculation method

It compares current and replacement auto-loan amortization, including fees, payment change, interest, break-even, and holding-period savings.

The result is only as reliable as the inputs. Use current balances, rates, fees, dates, and documents; then change uncertain assumptions to see whether the conclusion remains stable.

How to interpret the result

Treat the output as a comparison or planning range, not a quote, approval, eligibility decision, tax return, or prediction. Review the breakdown—not only its headline number—and read every stated exclusion.

For current background, review CFPB auto-loan resources. Product documents and official program tools control when they differ from this educational model.

Worked scenario

Put the result in context

For a $30,000 vehicle with $2,000 of tax and fees, a $5,000 down payment, and no trade balance, begin with $27,000 financed. Then add insurance, fuel, maintenance, and registration to evaluate the all-in budget.

This scenario illustrates the method; it is not a quote, forecast, recommendation, or substitute for entering your actual facts.

Before you calculate

Gather current information before changing the defaults. A result based on verified records is more useful than a precise answer built from guesses.

current balance, rate, and months remaining

Check the date, unit, and source of this input before entering it.

new rate and new term

Check the date, unit, and source of this input before entering it.

refinance fees and whether they are financed

Check the date, unit, and source of this input before entering it.

vehicle value and lender eligibility, which are not modeled

Check the date, unit, and source of this input before entering it.

What the result can answer

It can show how the entered assumptions interact, provide a consistent comparison, and reveal whether changing one important input materially changes the estimate.

What the result cannot decide

It cannot confirm approval, eligibility, market pricing, future performance, legal or tax treatment, contract quality, or whether the choice fits every part of your finances.

A practical next-step workflow

01 · Verify
Compare the inputs with current statements, quotes, official rules, and product documents.
02 · Stress-test
Run a second case with a less favorable value for vehicle value and lender eligibility, which are not modeled.
03 · Confirm
Get a written offer showing the amount financed, APR, term, and fees, then enter those exact figures and compare lifetime savings before acting.

Frequently asked questions

Should I shop by monthly payment?

No. Negotiate price and financing separately, then compare amount financed, APR, term, fees, and total cost.

Does lease versus buy include every charge?

Only the values entered. Obtain the lease disclosure and purchase quotes because mileage, disposition, wear, tax, and acquisition rules vary.

What can make this estimate differ from an actual result?

Timing, rounding, rate changes, fees, taxes, eligibility rules, product conventions, and facts not requested by this focused calculator can all create differences.

Which inputs deserve a second scenario?

Retest any input that is quoted rather than fixed, depends on future behavior, or materially changes the result. Conservative and optimistic cases reveal more than false precision.

What should I verify before making a decision?

Verify current statements, disclosures, official rules, taxes, fees, cancellation or prepayment terms, and the consequences of a less favorable outcome.

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Prepared by Loan Lyze Editorial and reviewed under the Loan Lyze editorial framework on November 8, 2026. Educational estimate only. See our methodology, editorial policy, and corrections policy.

Auto Refinance Calculator

Compare auto refinance terms