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Vehicle Refinance Calculator

See your new payment and total savings from refinancing a car loan, or work out a car lease payment from the cap cost, residual value, money factor and sales tax.

Updated November 4, 2026. Free, no sign-up; everything runs in your browser and nothing you type is stored.

Vehicle refinance calculator

Current loan balance ($)Current APR (%)Months leftNew APR (%)New term (months)Refinance fees ($)

–Current payment

–New payment

–Payment change

–Total cost difference

Car lease calculator (money factor)

MSRP ($)Negotiated price / cap cost ($)Cap cost reduction (down) ($)Acquisition fee ($)Residual value (% of MSRP)

Money factorTerm (months)Sales tax on payment (%)

Monthly lease payment with tax

–

–Base payment before tax

–Depreciation part

–Rent charge (finance) part

–Residual value

–Equivalent APR (MF × 2,400)

–Total lease cost

Refinance car loan: when it pays

Refinancing replaces your auto loan with a new one, ideally at a lower rate. It's worth checking when rates have fallen, your credit score has improved since you bought, or you took dealer financing at a high rate. $22,000 with 54 months left at 11% costs $518.35 a month; refinanced at 6.5% for the same 54 months (with $150 of fees rolled in) it's $474.20, saving about $2,384.

Keep the same or a shorter term: stretching the term lowers the payment but can raise total interest. Lenders often limit refinancing by the car's age, mileage and loan-to-value; check for a lien-release or title fee in your state.

Refi car payment calculator: what to compare

New payment vs current payment.
Total of remaining payments, old vs new, including fees.
Whether you'd lose add-ons (GAP, extended warranty) financed in the old loan; these may be refundable.

Car lease calculator: how a lease payment works

A lease payment has two parts: depreciation = (adjusted cap cost − residual value) ÷ months, and the rent charge = (adjusted cap cost + residual value) × money factor. Sales tax is usually charged on each payment. The money factor × 2,400 is roughly the equivalent APR: 0.0025 ≈ 6%.

Example: MSRP $40,000, price $38,000, $2,000 down, $695 acquisition fee, 58% residual ($23,200), money factor 0.0025, 36 months: depreciation $374.86 + rent charge $149.74 = $524.60 base, $557.39 with 6.25% tax.

Negotiate the cap cost like a purchase price, ask for the buy-rate money factor, and compare the total lease cost against buying with the car payment calculator.

Refinance auto loan: vehicle loan refinance calculator

To refinance auto loan debt, compare the two payments above: this vehicle loan refinance calculator includes fees so you see the true saving.

Common questions

Should I refinance my car loan?

Yes if you can get a meaningfully lower rate without a longer term or high fees; the calculator shows the total saved.

How is a car lease payment calculated?

(Cap cost − residual) ÷ months + (cap cost + residual) × money factor, plus tax.

What is a money factor?

The lease interest rate in decimal form; multiply by 2,400 to approximate the APR.

Does refinancing a car hurt credit?

A hard inquiry causes a small temporary dip; on-time payments rebuild it.

What is a good residual value?

Higher is better for the lessee: 55% to 65% on a 36-month lease is common.

Sources

General information, not financial, tax or legal advice. Check important numbers with the official source before acting on them.