Car Loan Calculator

Car Loan Calculator – Estimate Your Monthly Car Payment

Use the Car Loan Calculator to estimate your monthly vehicle payment, amount financed, total interest, and total loan cost before choosing an auto loan.

You can use Car Purchase mode to include the vehicle price, down payment, trade-in value, sales tax, additional fees, APR, and loan term. If you already know how much you want to borrow, switch to Simple Loan mode and calculate the payment directly from the loan amount, APR, and number of months.

The calculator also provides a loan term comparison, principal-versus-interest breakdown, down-payment scenarios, remaining loan balance chart, and complete amortization schedule.

The results are estimates based on the values you enter. Actual lender payments, taxes, fees, and financing terms may differ.

What Is a Car Loan Calculator?

A car loan calculator estimates the cost of financing a new or used vehicle.

The calculator uses three main pieces of information:

Amount financed

Annual percentage rate (APR)

Loan term

It then estimates the fixed monthly payment required to repay the loan over the selected number of months.

For a detailed vehicle purchase, the amount financed may also be affected by:

• Vehicle price
• Down payment
• Trade-in value
• Sales tax
• Additional fees

This makes the tool useful for comparing financing scenarios before you apply for an auto loan or agree to dealership financing.

How to Use the Car Loan Calculator

1. Choose Simple Loan or Car Purchase

The calculator includes two modes.

Simple Loan

Use this option when you already know the amount you want to finance.

Enter:

Loan Amount

APR

Loan Term

Car Purchase

Use this option when you want the calculator to estimate the amount financed from the details of a vehicle purchase.

Enter:

• Vehicle price
• Down payment
• Trade-in value
• APR
• Sales tax
• Additional fees
• Loan term

2. Enter the Vehicle Price

In Car Purchase mode, enter the purchase price of the vehicle.

Example:

$35,000

This is the starting point for calculating the estimated amount financed.

3. Enter Your Down Payment

A down payment is money you pay upfront instead of financing it.

Example:

Vehicle Price: $35,000

Down Payment: $5,000

A larger down payment generally reduces the amount that needs to be financed, assuming the other purchase costs remain unchanged.

4. Add Your Trade-In Value

If you are trading in another vehicle, enter its value as a credit.

Example:

Trade-In Value: $3,000

In this calculator, the entered trade-in value is subtracted from the estimated purchase cost when determining the financing amount.

Actual trade-in and tax treatment can vary, so compare the calculator result with the figures shown by your dealer or lender.

5. Enter the APR

APR stands for Annual Percentage Rate.

For example:

6.5% APR

The calculator converts the annual rate into a monthly interest rate when determining the payment.

Do not enter the APR as a monthly rate.

6. Choose the Loan Term

Common auto loan terms include:

36 months

48 months

60 months

72 months

84 months

You can select one of these options or enter a custom number of months.

7. Enter Sales Tax and Fees

Car purchases can include additional costs beyond the advertised vehicle price.

Examples include:

• Sales tax
• Documentation fees
• Registration-related charges
• Other financed fees

The calculator allows you to include a sales-tax percentage and additional fee amount.

In the calculator's current purchase model, sales tax is calculated from the entered vehicle price before the down payment and trade-in are deducted.

Actual tax rules differ by jurisdiction.

8. Calculate Your Car Payment

Select Calculate Payment.

The calculator will display:

• Estimated monthly payment
• Amount financed
• Total interest
• Total loan payments
• Loan term
• Vehicle cost breakdown
• Principal versus interest
• Loan term comparison
• Down-payment scenarios
• Loan balance chart
• Amortization schedule

How Is a Car Loan Payment Calculated?

Most fixed-rate auto loans use an amortization formula.

The monthly payment formula is:

M = P × [r(1 + r)ⁿ] ÷ [(1 + r)ⁿ − 1]

Where:

M = monthly payment

P = principal or amount financed

r = monthly interest rate

n = total number of monthly payments

The calculator performs this calculation automatically.

Car Loan Example

Suppose you are considering a vehicle with the following figures:

Vehicle Price: $35,000

Down Payment: $5,000

Trade-In Value: $3,000

Sales Tax: 6%

Additional Fees: $500

APR: 6.5%

Loan Term: 60 months

First calculate the sales tax:

$35,000 × 6% = $2,100

Add vehicle price, tax, and fees:

$35,000 + $2,100 + $500 = $37,600

Subtract the down payment:

$37,600 − $5,000 = $32,600

Subtract the trade-in:

$32,600 − $3,000 = $29,600

Estimated amount financed:

$29,600

The calculator then applies the 6.5% APR over 60 months to determine the estimated monthly payment.

What Is the Amount Financed?

The amount financed is the principal used in the loan calculation.

In Car Purchase mode, this calculator estimates it as:

Vehicle Price + Sales Tax + Fees − Down Payment − Trade-In

Using the previous example:

$35,000 + $2,100 + $500 − $5,000 − $3,000

= $29,600

This is different from the vehicle's sticker price because financing can include taxes and fees while being reduced by upfront credits.

Vehicle Price vs. Loan Amount

The price of a car and the amount you finance are not always the same.

For example, a:

$30,000 vehicle

could result in an amount financed that is:

higher than $30,000

if taxes and fees are financed.

It could also be:

lower than $30,000

if you make a substantial down payment or receive a trade-in credit.

This is why the calculator shows both the vehicle purchase breakdown and the actual estimated loan principal.

How Does a Down Payment Affect a Car Loan?

A down payment reduces the amount you need to borrow.

For example:

Vehicle price and financed costs:

$35,000

Down payment:

$5,000

The loan principal may be approximately $5,000 lower than it would be with no down payment, assuming everything else remains the same.

Reducing the principal generally lowers:

Monthly payment

and:

Total interest paid

because interest is being charged on a smaller loan balance.

What If I Put More Money Down?

The calculator includes a What If You Put More Money Down? section.

It compares your current down payment with scenarios such as:

+$1,000

+$2,500

+$5,000

while keeping the APR and loan term the same.

This allows you to see how an additional upfront payment changes the estimated monthly loan payment.

How Does a Trade-In Affect a Car Loan?

A trade-in can reduce the amount financed when its value is applied as a credit toward the purchase.

For example:

Vehicle-related cost:

$32,000

Trade-in:

$4,000

After applying the trade-in credit, the amount that remains may be reduced to approximately:

$28,000

before considering any other financing adjustments.

The calculator uses the entered trade-in value directly as a credit.

If you still owe money on the trade-in vehicle, the dealer's actual financing calculation may differ because the calculator does not separately calculate an outstanding trade-in loan balance.

What Is APR on a Car Loan?

APR means Annual Percentage Rate.

It represents an annualized borrowing rate used to determine the interest charged on a loan.

For example:

6.5% APR

does not mean you pay 6.5% of the original balance every month.

For monthly-payment calculations, the calculator converts the annual rate to a monthly rate.

A higher APR generally results in:

• Higher monthly payments
• More total interest

when the loan amount and term remain unchanged.

0% APR Car Loans

A 0% APR loan does not charge interest under the calculator's assumptions.

For example:

Amount Financed: $24,000

APR: 0%

Term: 48 months

Monthly payment:

$24,000 ÷ 48 = $500

Total interest:

$0

Promotional 0% financing may have specific eligibility requirements or other terms, so the calculator only estimates the mathematical payment.

How Loan Term Affects Your Monthly Car Payment

Loan term determines how many monthly payments you make.

A shorter term means the principal is repaid over fewer months.

A longer term spreads repayment across more months.

For the same principal and APR:

Shorter Loan Term

Typically produces:

Higher monthly payment

and:

Lower total interest

Longer Loan Term

Typically produces:

Lower monthly payment

and:

Higher total interest

The calculator's Loan Term Comparison lets you see these differences directly rather than relying only on the monthly payment.

36 vs. 48 vs. 60 vs. 72 vs. 84 Month Car Loans

The calculator automatically compares common financing terms.

For example:

The actual numbers depend on the loan principal and APR.

This comparison helps show the tradeoff between monthly affordability and total borrowing cost without assuming that any single term is right for every borrower.

How Much Interest Will I Pay on a Car Loan?

Total interest is the difference between your total loan payments and the original financed amount.

The basic relationship is:

Total Interest = Total Loan Payments − Principal

For example:

Amount Financed: $25,000

Total Payments: $29,000

Then:

Total Interest = $4,000

The calculator displays this automatically.

Principal vs. Interest

Each loan payment can contain two parts:

Principal

The portion that reduces your remaining loan balance.

Interest

The borrowing cost charged on the outstanding balance.

Early in an amortizing loan, a larger portion of each payment may go toward interest than later in the schedule.

As the balance declines, the interest portion generally becomes smaller.

The calculator includes a visual Principal vs. Interest breakdown for the entire loan.

What Is Total Loan Cost?

For the loan itself, the calculator displays:

Principal

The amount financed.

Total Interest

The estimated interest charged over the selected term.

Total Loan Payments

The total of all scheduled loan payments.

The relationship is approximately:

Principal + Total Interest = Total Loan Payments

Small rounding differences can sometimes occur in real lender schedules because individual payments may be rounded to cents.

What Is a Car Loan Amortization Schedule?

A car loan amortization schedule shows how each monthly payment changes the loan balance.

The calculator displays:

• Payment number
• Payment amount
• Principal paid
• Interest paid
• Remaining balance

For example:

The balance gradually decreases until it reaches approximately zero at the end of the loan term.

How Does a Car Loan Balance Change Over Time?

The Loan Balance Over Time chart shows the estimated remaining principal throughout the loan.

At:

Month 0

the balance equals the original financed amount.

After each payment, some principal is repaid.

By the final scheduled payment, the remaining balance should reach approximately:

$0

assuming all payments are made according to the modeled schedule.

Can I Calculate a Car Loan Without Vehicle Price?

Yes.

Use Simple Loan mode.

If you already know:

Loan Amount

APR

and:

Loan Term

you do not need to enter vehicle price, down payment, tax, trade-in, or fees.

This mode is useful when comparing lender offers that already specify the amount financed.

Simple Auto Loan Example

Suppose:

Loan Amount: $30,000

APR: 6.5%

Loan Term: 60 months

The calculator applies the fixed-rate amortization formula and estimates:

Monthly payment

Total interest

Total loan payments

and provides the amortization schedule.

This lets you evaluate the financing itself without recreating the vehicle purchase calculation.

New Car Loan Calculator

The calculator can be used for new-car financing by entering:

• New vehicle price
• Down payment
• Trade-in
• APR
• Sales tax
• Fees
• Loan term

You can then compare different financing terms before discussing final figures with the dealership or lender.

Used Car Loan Calculator

The same calculation also works for used vehicles.

Enter the used-car purchase price and your expected financing information.

Interest rates and financing conditions can differ between borrowers and vehicles, so use the APR from the loan offer or scenario you want to evaluate.

How Sales Tax Affects a Car Loan

If sales tax is financed, it can increase the loan principal.

For example:

Vehicle price:

$30,000

Sales tax:

6%

Estimated tax:

$1,800

If that amount is financed, it becomes part of the purchase cost used to determine the loan amount.

However, tax rules differ by location, and some jurisdictions treat trade-ins or other credits differently.

The calculator uses the sales-tax percentage you enter and applies it to the vehicle price as a simplified estimate.

How Additional Fees Affect Financing

Fees may increase the amount financed if they are included in the loan.

Examples could include applicable:

• Documentation fees
• Registration-related charges
• Processing charges
• Other financed purchase costs

If you expect a fee to be financed, enter it in the Additional Fees field.

Do not include costs you do not want represented in the financing estimate.

What Happens If My Down Payment Covers the Car?

If the down payment and trade-in credit cover the purchase price, tax, and entered fees, there may be no amount left to finance.

The calculator will indicate:

No financing is required based on the entered values.

In that situation, the calculated monthly loan payment is effectively zero.

What Happens If I Make No Down Payment?

A:

$0 down payment

is valid.

The calculator simply leaves the full eligible purchase amount to be financed after other entered adjustments.

This can result in a higher principal and potentially more total interest than an otherwise identical scenario with a down payment.

Can I Use a Custom Loan Term?

Yes.

In addition to common terms such as:

36, 48, 60, 72, and 84 months

you can enter a custom term.

The calculator currently accepts terms from:

1 to 120 months

This can be useful for comparing unusual lender offers.

Why Monthly Payment Alone Does Not Show the Full Loan Cost

A monthly payment is important, but it does not tell you how much the loan costs overall.

Consider two loans with the same amount financed and APR:

Loan A

Shorter term

Higher monthly payment

Loan B

Longer term

Lower monthly payment

Loan B may look more affordable each month, but the borrower can pay interest for a longer period.

That is why this calculator displays both:

Monthly Payment

and:

Total Interest

Common Car Loan Calculation Mistakes

Looking Only at Vehicle Price

Taxes and financed fees can increase the loan amount.

Looking Only at Monthly Payment

A lower monthly payment may come from extending the loan term.

Confusing APR With a Monthly Rate

APR is an annual rate. The calculator converts it to a monthly rate.

Forgetting the Down Payment

Money paid upfront should reduce the amount financed when it is applied toward the purchase.

Ignoring Trade-In Credit

A trade-in may reduce the financed purchase amount.

Ignoring Total Interest

Comparing the total interest can reveal substantial differences between loan terms.

Assuming Every Tax Calculation Is the Same

Vehicle taxes and trade-in rules vary by location. The calculator uses a simplified purchase assumption based on the inputs you provide.

Car Loan Calculator for Comparing Loan Offers

You can use the calculator to compare multiple financing scenarios.

For each offer, enter:

Loan amount or vehicle purchase details

APR

Loan term

Then compare:

• Monthly payment
• Total interest
• Total repayment
• Amortization schedule

When comparing offers, make sure the assumptions are consistent.

For example, two offers should generally use the same vehicle price and down-payment assumptions if you want the financing comparison to be meaningful.

Frequently Asked Questions

What is a car loan calculator?

A car loan calculator estimates your monthly auto-loan payment based on the amount financed, APR, and repayment term.

How do I calculate a monthly car payment?

Use the loan principal, monthly interest rate, and number of monthly payments in an amortization formula. The calculator performs this automatically.

What is the amount financed?

The amount financed is the principal borrowed through the auto loan.

Does a larger down payment lower my car payment?

If everything else stays the same, a larger down payment reduces the financed principal and therefore generally lowers the monthly payment.

Does a trade-in reduce my loan amount?

In this calculator, the entered trade-in value is treated as a direct credit that reduces the estimated amount financed.

Does a longer loan term lower my monthly payment?

With the same principal and APR, spreading repayment over more months generally lowers the required monthly payment but can increase total interest.

Can I calculate a 0% APR car loan?

Yes. With 0% APR, the principal is divided across the selected number of monthly payments without interest.

Can I use the calculator for a used car?

Yes. The calculation works for both new and used vehicle financing.

Does the calculator include taxes?

Car Purchase mode includes a user-entered sales-tax percentage.

Are trade-in tax rules included?

The calculator uses a simplified assumption in which sales tax is calculated from the entered vehicle price before subtracting trade-in and down payment. Actual rules vary by jurisdiction.

Does the calculator include insurance?

No. Vehicle insurance is not included in the loan payment calculation.

Is this the payment a lender will offer me?

Not necessarily. It is an estimate based on the values you enter. Actual lender terms can vary based on credit, fees, rate calculations, lender policies, and other financing details.

Estimate Your Monthly Car Payment

Use the Car Loan Calculator to estimate your monthly payment before committing to vehicle financing.

Choose Simple Loan if you already know your loan amount, or use Car Purchase to include the vehicle price, down payment, trade-in, sales tax, and additional fees.

You can then review your:

Estimated monthly payment

Amount financed

Total interest

Total loan payments

Loan-term comparison

and:

Complete amortization schedule

to understand more than just the monthly payment.