How does the Auto Loan Calculator handle sales tax on a trade-in?

By default it taxes the price minus the trade-in value, which is how most US states calculate it. Toggle 'Tax the full price' if your state taxes the full purchase price instead.

Does the Auto Loan Calculator include fees like title or registration?

No. It covers price, down payment, trade-in, sales tax, and interest only. Add any dealer, title, or registration fees to the vehicle price yourself if you want them financed.

Is the Auto Loan Calculator's monthly payment exact?

It is an estimate based on the numbers you enter. Your lender's actual payment may differ slightly due to rounding, fees, or how they compound interest — treat this as a planning figure, not financial advice.

What happens if I enter a 0% interest rate?

The Auto Loan Calculator divides the loan amount evenly across the term with no added interest, which matches how promotional 0% APR financing works.

Does the Auto Loan Calculator upload my vehicle or financing details?

No. Every calculation runs locally in your browser. The price, payment, and rate figures you enter are never sent to ArrayKit or anywhere else.

Auto Loan Calculator Online

Estimate your monthly car payment from price, down payment, trade-in, and sales tax, right in your browser.

The Auto Loan Calculator runs entirely in your browser. Figures are estimates only — not financial advice — and the vehicle price, payment, and rate details you enter never leave your device.

Open the Loan Calculator

About Auto Loan Calculator

The Auto Loan Calculator estimates your monthly car payment from the vehicle price, down payment, trade-in value, sales tax rate, interest rate, and loan term. It works out the amount you actually finance after your down payment and trade-in are applied, adds sales tax using your state's rule for trading in a vehicle, then computes a fixed monthly payment along with total interest and total loan cost over the term. It is useful when comparing dealer financing offers, deciding how much to put down, or checking whether a shorter term saves meaningfully on interest. Figures are estimates only — not financial advice — and everything runs locally in your browser, so your price and financing details are never uploaded.

Features

Computes the financed loan amount from price, down payment, and trade-in value
Applies sales tax on the price minus trade-in, or on the full price if your state taxes that way
Calculates a fixed monthly payment using the standard amortized loan formula
Shows total interest paid and total loan cost over the full term
Handles a 0% interest rate by dividing the loan amount evenly across the term
Copy a plain-text summary of every result with one click
Works for any term length, from short 24-month loans to 84-month terms
Runs entirely in your browser — no vehicle or financing details are uploaded

How to use the Auto Loan Calculator

Enter the vehicle price, down payment, and trade-in value
Enter your local sales tax rate and the loan's annual interest rate
Enter the loan term in months
Read the monthly payment, total interest, and total loan cost below

Example

Input

$30,000 car, $5,000 down, 5%, 60 mo

Output

Loan: $25,000
Monthly: $471.78

A $30,000 vehicle with $5,000 down financed at 5% APR over 60 months.

Common errors & troubleshooting

Monthly payment looks far too high or too low. — Enter the interest rate as a percent (5), not a decimal (0.05) — the Auto Loan Calculator treats the rate field as a percentage.
Loan amount doesn't match what the dealer quoted. — Check whether your state taxes the full price or price minus trade-in, and toggle 'Tax the full price' to match — this changes the sales tax added to the loan.
Total interest shows as 0. — A 0% or blank interest rate simply divides the loan amount evenly across the term, which is expected for promotional 0% APR offers.
Term entered in years instead of months. — The loan term field expects months, so a 5-year loan should be entered as 60, not 5.

Frequently asked questions

What is the Auto Loan Calculator?: It is a tool that estimates your monthly car payment from the vehicle price, down payment, trade-in value, sales tax rate, interest rate, and loan term, using the standard amortized loan formula.
How does the Auto Loan Calculator handle sales tax on a trade-in?: By default it taxes the price minus the trade-in value, which is how most US states calculate it. Toggle 'Tax the full price' if your state taxes the full purchase price instead.
Does the Auto Loan Calculator include fees like title or registration?: No. It covers price, down payment, trade-in, sales tax, and interest only. Add any dealer, title, or registration fees to the vehicle price yourself if you want them financed.
Is the Auto Loan Calculator's monthly payment exact?: It is an estimate based on the numbers you enter. Your lender's actual payment may differ slightly due to rounding, fees, or how they compound interest — treat this as a planning figure, not financial advice.
What happens if I enter a 0% interest rate?: The Auto Loan Calculator divides the loan amount evenly across the term with no added interest, which matches how promotional 0% APR financing works.
Does the Auto Loan Calculator upload my vehicle or financing details?: No. Every calculation runs locally in your browser. The price, payment, and rate figures you enter are never sent to ArrayKit or anywhere else.

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Down Payment Calculator — Work out the down payment, loan amount and how long to save for it.