Know your real car payment in seconds.

What an auto loan calculator does

An auto loan calculator turns three numbers — a vehicle price, an interest rate (APR), and a loan term in months — into the number you actually came for: your monthly payment. AutoLoanWise goes further. Every result includes the total interest you'll pay over the life of the loan, the exact month your loan will be paid off, and a full amortization schedule that shows the principal-vs-interest split for every single payment. No signup wall, no email gate, and your inputs never leave your browser.

Use the auto loan calculator before you buy to set a realistic budget. Use the refinance calculator if rates have dropped or your credit has improved — it shows monthly and lifetime savings net of fees and gives you a real break-even date. Use the payoff calculator if you're already paying a loan and want to see what an extra $50 or $100 a month would actually save. Together those three answer most of what people ask a car-finance calculator for.

How the math works (in one paragraph)

Every calculator on this site uses the standard fixed-rate amortization formula your lender uses: monthly payment equals P × i ÷ (1 − (1 + i)⁻ⁿ), where P is the amount financed (price plus tax and fees, minus down payment, trade-in equity, and rebates), i is the monthly interest rate (APR ÷ 12), and n is the number of monthly payments. Each month, interest is charged on the outstanding balance and the rest of your payment chips away at principal. Early on, most of your payment is interest; toward the end, almost all of it is principal — which is why extra payments early in the loan save dramatically more than the same payments later. Full formulas and assumptions are on the methodology page.

Beyond the basic payment

Pricing a vehicle is rarely as simple as "price × APR × term." Specialty calculators on this site handle the situations the big-brand tools usually skip: the affordability calculator runs the formula backwards, starting from a monthly budget and computing the maximum vehicle price you can afford; the down payment calculator shows 0%, 10%, and 20% down side by side so you can see how each level changes the payment and total interest; the EV loan calculator applies the federal Clean Vehicle Credit as a cap-cost reduction; the lease vs buy calculator compares both options over the same period and credits your equity at the end if you buy; and the commercial truck calculator handles a balloon payment at maturity — common in business vehicle financing but missing from most consumer tools.

By loan term and by state

Term length is one of the largest drivers of total cost. Compare the same vehicle at a 48-month, 60-month, 72-month, or 84-month loan to see how the monthly payment and total interest move. State tax and registration fees also vary widely — our state-by-state auto loan calculators are pre-filled with each state's real statewide rate and typical title/registration fees, with an explainer of how that state taxes trade-in value and any quirks like Georgia's TAVT.

Jump straight to a state: Texas, Florida, California, Ohio, Illinois, Michigan, Arizona, Virginia, Georgia, Massachusetts, New Jersey, New York, North Carolina, Pennsylvania, Tennessee, Washington.

Plain-English guides

Our guides answer the questions readers actually ask: how to finance a car, how to apply for a car loan, how to get approved with bad credit, what a car note is, how interest is calculated, how long it actually takes to buy a car, and our first-time car buyer guide. What to expect from the average car payment in 2026. Each guide is paired with the calculator that lets you run the numbers on your own situation.

Why AutoLoanWise is different

Most auto-finance calculators online either hide the result behind a signup wall, monetize by selling your information to lenders or dealers, or are so simplified that they only return a payment without showing the total interest or amortization. AutoLoanWise does none of those things. There's no account, no email gate, no "unlock the result" popup, and no lead form. Every calculation runs locally in your browser as plain JavaScript — the numbers you enter never leave your device, and we couldn't share them even if we wanted to. The result you see on screen includes the monthly payment, the total interest, the payoff date, the sales tax breakdown, and the full amortization schedule with a CSV export. That's the whole point.

Authoritative consumer guidance we cite

Our guides and calculators reference consumer-finance regulators where it matters. The Consumer Financial Protection Bureau (CFPB) publishes guidance on shopping for an auto loan, comparing dealer-arranged financing against direct lender offers, and what to expect in the paperwork. The Federal Trade Commission (FTC) publishes plain-English explanations of dealership financing, add-ons, and what your rights are as a consumer. Where we make a numerical claim about typical APR by credit tier, average new-car payment, or federal EV credit rules, the underlying figures come from these regulators, Experian's State of the Automotive Finance Market, or the IRS Clean Vehicle Credit page.

Calculator accuracy and what we can't do

Every calculator uses the same fixed-rate amortization formula your lender uses, rounded to the cent. The math itself is exact for the inputs you supply. Where the calculator can't match your lender exactly, it's because real-world loans accrue interest daily rather than monthly (a difference of pennies on most loans), because your locality may add tax above the statewide base, or because your lender's actual APR depends on credit-tier underwriting that isn't public. AutoLoanWise is an educational tool, not a loan offer or a lender quote — see the disclaimer. Always confirm final terms with the institution that's actually lending you the money.

How to think about auto-loan total cost

The number most car buyers fixate on is the monthly payment, because it's the line item that shows up on every billing cycle. But the total cost of an auto loan — what you actually pay across the life of the loan — is the sum of the principal you borrowed plus all the interest charged across every month. Two loans with the same monthly payment can produce very different total costs if their APRs and terms differ. A loan that hits a lower monthly payment by stretching the term costs more in total because the balance falls more slowly and interest charges accumulate over more months. A loan that keeps the term short produces a higher payment but a meaningfully lower total cost. Whichever calculator you use, the result includes both numbers side by side, and the amortization schedule shows the principal-vs-interest split month by month so you can verify that what looks affordable on a monthly basis is also affordable in aggregate.

Tax, fees, and the "out-the-door" price

The number to negotiate with a dealer is the out-the-door price — the vehicle price plus tax, title, registration, and any documentation fees, with all rebates already applied. That's the number you actually finance, and it's the number our calculators ask for (broken into components so each one is visible). Some states deduct the trade-in value from the taxable base, lowering the tax owed; a handful tax the full price even when you trade. Some cities and counties add 1% to 3% on top of the statewide rate, which the state-pre-filled calculators don't default to (we keep the calculator from overstating tax). Adjust the sales-tax field upward for your locality before reading the monthly payment as final.

A note on credit and APR

Your credit tier — super-prime, prime, non-prime, sub-prime, deep sub-prime — drives the APR more than any negotiation skill at the dealer. The advertised APR is almost always the lender's top-tier offer, available only to super-prime borrowers. Most buyers see a higher rate; sub-prime borrowers see rates several percentage points above the headline. Before you commit, get pre-approved by a credit union or direct lender so you know your real APR. Within a 14-day window, multiple auto-loan hard credit pulls count as a single inquiry on FICO Auto Score — meaning rate-shopping doesn't damage your credit. Run the calculator at your real APR, not at the advertised rate, and you'll see the true payment and total cost.