Finance calculators

Navy Federal Car Loan Calculator

Updated Jul 25, 2026 By Jehan Wadia
Rate Formulas
Loan Details
Include taxes, title and fees if they are being financed.
Cash down plus any trade-in value.
Shorter terms mean higher payments but less total interest.
APR may vary based on your credit score, loan term, down payment, vehicle age and lender.
Purchase price − down payment (calculated for you).
Estimated Monthly Payment
$528.35
60 payments at 6.50% APR
Total Interest Paid
$4,701.00
Total Cost of Loan
$31,701.00
Loan Amount
$27,000.00
Cost Summary
Vehicle Purchase Price$32,000.00
Down Payment$5,000.00
Amount Financed$27,000.00
Monthly Payment$528.35
Number of Payments60
Total of Payments$31,701.00
Total Interest$4,701.00
Interest as % of Loan17.41%
Total Out-of-Pocket (with down payment)$36,701.00
Balance & Payment Composition
Step-by-Step Solution
Amortization Schedule

Introduction

This Navy Federal Car Loan Calculator shows what a car loan will cost you each month. Type in the price of the car, your down payment, the loan term, and the interest rate (APR). The calculator does the math for you right away.

You will see your estimated monthly payment, the total interest you pay, and the full cost of the loan. It also shows the loan amount after your down payment is taken out.

Want more detail? Check the charts to see how your balance drops over time. Open the amortization schedule to see every payment, one month at a time, with the split between principal and interest. The step-by-step section shows the formula and the numbers used, so you can see exactly how the payment was found.

Use it to compare terms, try a bigger down payment, or test a lower rate before you sign for a car loan. You can also cross-check your numbers with our Navy Federal Auto Loan Calculator or the general Auto Loan Calculator.

How to use our Navy Federal Car Loan Calculator

Enter the price of the car, your down payment, the loan term, and the interest rate. The calculator shows your monthly car payment, the total interest you will pay, and the full cost of the loan.

Vehicle Purchase Price: Type the full price of the car. Add taxes, title, and fees here if you plan to finance them too. A Sales Tax Calculator and DMV Fee Calculator can help you estimate those add-ons.

Down Payment: Type the cash you will pay up front, plus any trade-in value. Use 0 if you are not putting money down. Not sure what your car is worth? Try the Trade In Value Calculator or the Down Payment Calculator.

Loan Term: Pick how many months you want to pay, from 24 to 84. A shorter term means a bigger monthly payment but less interest.

Interest Rate (APR): Type your yearly rate as a percent. Your rate depends on your credit score, the loan term, and the age of the car. See how rates translate into cost with the APR Calculator or the Loan Interest Rate Calculator.

Loan Amount (Amount Financed): This box fills in for you. It is the car price minus your down payment.

Click Calculate to see your results, the cost summary, the charts, and the step-by-step math. Click View Amortization Schedule to see how much of each payment goes to principal and interest. Click Reset to start over.

What Is a Car Loan?

A car loan is money you borrow to buy a vehicle. You pay it back in equal monthly payments over a set number of months, called the term. Each payment covers two things: part of the money you borrowed (the principal) and the cost of borrowing it (the interest). The same math powers our Loan Payment Calculator and Loan Calculator.

What Affects Your Car Payment

  • Loan amount: The price of the car minus your down payment and trade-in. A bigger down payment means a smaller loan and a lower payment. Check what fits your budget with the Car Affordability Calculator.
  • APR (interest rate): The yearly rate you pay to borrow. A lower APR saves you money. Your credit score, the car's age, and the loan term all help set your rate. Estimate the interest side with the Car Interest Calculator.
  • Loan term: How many months you have to pay. A longer term lowers your monthly payment but you pay more interest in total. Compare with the Used Car Loan Calculator if you are buying pre-owned.

How Auto Loan Interest Works

Interest is charged on the balance you still owe. In the early months, more of your payment goes to interest. As the balance drops, more of each payment goes to principal. This is called amortization, and it is why paying extra early can save you a lot. See the impact with the Extra Payment Calculator or the Auto Loan Payoff Calculator.

Things to Remember Before You Borrow

Taxes, title, and dealer fees can be added to the loan, which raises your total cost. Many lenders, including credit unions like Navy Federal, offer rate discounts for new cars, shorter terms, or automatic payments. Getting pre-approved before you shop helps you know your budget and gives you a rate to compare against dealer financing. If you already have a loan, an Auto Refinance Calculator can show whether a new rate is worth it, and a Car Lease Calculator helps you weigh leasing instead.

A good rule is to keep your car payment at or below about 15% of your monthly take-home pay, and to try for a term of 60 months or less. Use the Take Home Pay Calculator and the DTI Calculator to see how the payment fits your income. Also plan for gas, insurance, and repairs, since those costs are not part of your loan payment. The Fuel Cost Calculator, Car Insurance Calculator, and Car Depreciation Calculator round out the true cost of ownership.


Formulas used

Amount Financed (Loan Principal)
P = \text{Price} - \text{Down Payment}
Monthly Interest Rate
i = \frac{\text{APR}/100}{12}
Monthly Payment
M = P \cdot \frac{i(1+i)^n}{(1+i)^n - 1}
Monthly Payment at 0% APR
M = \frac{P}{n}
Monthly Interest and Principal Portions
I_k = B_{k-1} \cdot i, \quad PR_k = M - I_k, \quad B_k = B_{k-1} - PR_k
Total Interest Paid
\text{Total Interest} = \left(\sum_{k=1}^{n} \text{Payment}_k\right) - P
Total Cost of Loan and Out-of-Pocket
\text{Total Cost} = P + \text{Total Interest}, \quad \text{Out-of-Pocket} = \text{Total Cost} + \text{Down Payment}
Interest as Percent of Loan
\text{Interest \%} = \frac{\text{Total Interest}}{P} \times 100

Frequently asked questions

Is this calculator official Navy Federal tool?

No. This is a free tool that uses standard loan math. It is not run by or tied to Navy Federal Credit Union. Your real rate, payment, and terms come from your lender.

What formula does the calculator use to find my monthly payment?

It uses the standard amortized loan formula:

M = P × [i(1+i)n] / [(1+i)n − 1]

  • M = monthly payment
  • P = loan amount after your down payment
  • i = APR divided by 12
  • n = number of months

If your APR is 0%, it just divides the loan amount by the number of months.

Why is my last payment a few cents different?

Monthly payments are rounded to the penny. Those small roundings add up over the term. The calculator adjusts the final payment so your balance ends at exactly $0.00.

Does the calculator include taxes, title, and dealer fees?

Only if you add them. Put them into the Vehicle Purchase Price box if you plan to finance them. If you pay those costs in cash at the dealer, leave them out.

Where do I enter my trade-in?

Add your trade-in value to the Down Payment box. For example, a $2,000 trade-in plus $3,000 cash means you type 5000.

Can I enter 0 for the down payment?

Yes. Type 0 and the full car price becomes your loan. Your payment and total interest will be higher.

Does the calculator show sales tax savings on a trade-in?

No. In some states a trade-in lowers the taxable price. This tool does not figure that. Check your state rules and adjust the purchase price yourself.

What is the difference between total interest, total cost of loan, and total out-of-pocket?

  • Total interest is what you pay to borrow.
  • Total cost of loan is the loan amount plus interest.
  • Total out-of-pocket adds your down payment on top.

Why does a longer term cost me more even though my payment is lower?

You pay interest for more months, and your balance drops slower. Try 60 months and 84 months in the calculator. The monthly payment falls, but total interest goes up.

What APR should I enter if I do not know my rate yet?

Use a rough guess based on your credit and the car's age, then test a range. Try one rate you hope for and one a few points higher so you see both payments.

Is APR the same as the interest rate here?

In this tool they are treated the same. On real auto loans, APR can also include some lender fees, so your APR may be a bit higher than the plain interest rate.

Can I model extra payments in this calculator?

No. This one assumes equal payments for the whole term. To see how extra money speeds up payoff, use an extra payment or auto loan payoff calculator.

How do I read the amortization schedule?

Each row is one payment. It shows how much goes to principal, how much goes to interest, and what you still owe after that payment. Shaded rows mark the end of each year.

Why is so much of my early payment going to interest?

Interest is charged on what you still owe. Your balance is largest at the start, so the interest slice is largest then. It shrinks every month as you pay down principal.

What does the balance chart show?

Three lines: your remaining balance falling to zero, your total principal paid rising, and your total interest paid rising. Where the principal line crosses above the balance line, you are past the halfway point of the loan.

Can I use this for a used car or a refinance?

Yes. The math is the same. For a used car, enter the used car price and a used car rate, which is often higher. For a refinance, enter your current payoff amount as the price and 0 as the down payment.

Can I use it for a motorcycle, boat, or RV loan?

Yes, as long as the loan uses fixed monthly payments. Just enter that loan's price, down payment, term, and rate.

Does the payment shown include insurance, gas, or an extended warranty?

No. It only shows loan principal and interest. Budget for insurance, fuel, upkeep, and registration on top of this payment.

How much should I put down on a car?

About 20% down on a new car and 10% on a used car is a common goal. More down means a smaller loan, a lower payment, less interest, and less risk of owing more than the car is worth.

What if I get an error message?

Check these rules: the purchase price must be more than $0 and no more than $5,000,000, the down payment must be less than the price and cannot be negative, and the APR must be 0 or more and under 50%.

How accurate are these results?

The math is exact for a fixed-rate loan with equal monthly payments. Your real payment can differ if the lender adds fees, uses daily simple interest, or your first payment date is far out.

Does the calculator handle a 0% APR promotion?

Yes. Enter 0 for the APR. Your payment becomes the loan amount divided by the number of months, and total interest is $0.