Don’t Guess the Payment. Check It.

Compare your deal vs the dealer’s quote in seconds

A free tool built using real dealership experience to help you avoid overpaying.

Car Payment Calculator

Car Payment Calculator

Estimate a real auto payment, compare it to the dealership quote, and get smart deal tips before you walk into the finance office.

Build Your Deal

Vehicle Price

Price of the car, before anything else is added. Begin with negotiation here.
Extras like protection packages, GPS, or dealer markup. These can often be negotiated!
Manufacturer discounts or incentives. These are usually set by the manufacturer, and can change at any time. Ask to see the rebate guidelines provided by the manufacturer to the dealer.

Trade

What the dealer is giving you for your trade. There are several online resources to check the value of your used vehicle.
What you still owe on your trade. This is acquired by calling your lender and asking for a 10-day payoff quote.

Taxes & Fees

Dealer processing fee. Usually non-negotiable.
State fees to register the vehicle.
Ask the dealer what tax rate they are using. Each state and county applies taxes differently. Ask if the dealer is taxing your home zip code, or if taxes are based on the dealer’s location.
Ask if tax is applied to the Vehicle Selling Price or the difference of the Vehicle Selling Price and the Trade-in Value.
Estimated Tax
$0.00
Total Taxes & Fees
$0.00
Combined total of estimated tax, doc fee, and registration fees.

Financing

Cash you are putting down today.
Ask: is this the buy rate or marked-up rate? Lenders or local state laws can dictate the allowable mark-up percentage of an interest rate.
Longer term = lower payment, more interest paid.

This is an estimate only. Taxes, fees, registration, lender calculations, credit approval, and state rules may vary. Always ask the dealership for a complete buyer’s order.

Why Your Payment Might Be Wrong

Most car shoppers focus on the monthly payment, but that number can be influenced by more than just the price of the vehicle. Dealer add-ons, marked-up interest rates, taxes, fees, trade values, and loan terms can all change the payment quickly.

  • Dealer add-ons can increase your payment without feeling obvious.

  • Interest rates may be marked up from the lender’s buy rate.

  • Taxes and fees may be calculated differently depending on your state, county, or registration address.

  • Trade-in value and payoff can dramatically change your amount financed.

  • Longer loan terms can lower the payment while increasing total interest.

    Before you agree to a monthly payment, check the full deal.

Want a Second Set of Eyes Before You Sign?

Buying a car is one of the biggest financial decisions most people make, and small changes in the deal can cost thousands over time.

If you want, I can review your deal and break down exactly what you're paying for, including hidden fees, interest rate markups, and whether the numbers make sense.

Even a $25/month difference = $1,800 over a 72-month loan.

Car Payment Calculator & Dealer Payment Check Tool

Use this free car payment calculator to estimate your monthly auto loan payment based on vehicle price, trade-in value, taxes, fees, and interest rate. This tool helps you understand how each part of your deal affects your payment.

Unlike basic calculators, this tool also allows you to compare your estimated payment against the dealer’s quoted payment. This helps identify potential differences caused by add-ons, marked-up interest rates, or incorrect tax calculations.

Before signing any car deal, it’s important to verify the numbers. Even small differences in payment can add up to thousands of dollars over the life of the loan.

How to Calculate a Car Payment

A car payment is based on the total amount financed, the interest rate (APR), and the loan term. The amount financed includes the vehicle price, minus trade-in value and down payment, plus taxes, fees, and any dealer add-ons.