Car Loan Payment Calculator

Estimate your monthly payment, amount financed and total interest for a standard fixed-rate auto loan. Change the vehicle price, down payment, interest rate, term, sales tax and fees to compare financing scenarios before you shop or sign.

Enter your car loan details

Vehicle price ($)

Negotiated purchase price before taxes and fees.

Down payment ($)

Cash you plan to pay upfront at signing.

Interest rate (%)

Use the contract interest rate for payment math. Compare APR separately because APR can include certain finance charges.

Loan term (months)

Length of the loan in months. Shorter terms usually mean higher payments but lower total interest.

Sales tax rate (%)

Simplified estimate using the vehicle price as the taxable base. Actual rules vary by state and transaction.

Title, registration and doc fees ($)

Estimated title, registration and dealer fees included in the amount financed.

Results update automatically as you change the inputs. Estimates do not include insurance, fuel, maintenance or every state-specific tax and fee rule.

Estimated monthly payment

Total of loan payments

Principal vs. interest over the life of the loan

Principal Interest

Enter your vehicle price, interest rate, loan term and down payment to estimate your monthly car payment and total borrowing cost.

Example: Shorter term vs. longer term Imagine you finance a $30,000 car at a 7% interest rate with $3,000 down. Assuming about 6% sales tax and $600 in title, registration and doc fees, you end up financing roughly $29,400.

60-month term: payment ≈ $582 per month, total interest ≈ $5,529.
84-month term: payment ≈ $444 per month, total interest ≈ $7,873.

A longer term can free up cash in your monthly budget, but you pay significantly more interest over time. If your budget allows it, choosing the shorter term keeps your total borrowing cost lower.

How this car loan calculator works

The calculator starts with the estimated amount financed, then applies a fixed interest rate over the number of monthly payments you choose. The result is a level-payment estimate: the required payment stays the same each month, while the share going to interest generally falls as the principal balance declines.

For planning purposes, the estimated amount financed is:

Amount financed Vehicle price + estimated sales tax + fees - down payment

This is intentionally simple. It does not model trade-in credits, negative equity, rebates, lender add-ons or state-specific tax treatment.

Car loan payment formula

For a standard fixed-rate amortizing loan, the monthly payment is calculated with the common installment-loan formula:

Monthly payment M = P × [r(1 + r)^n] / [(1 + r)^n - 1]

P is the amount financed, r is the monthly interest rate, and n is the number of monthly payments. If the interest rate is 0%, the calculator simply divides the amount financed by the number of payments.

This model is useful for comparing financing scenarios, but real auto loans can use interest methods that differ from a simplified monthly schedule. Simple-interest auto loans are common, and interest may be calculated from the outstanding balance on a daily or monthly basis. Payment timing and extra principal payments can therefore change the actual interest charged.

Interest rate vs. APR: use the right number

The calculator uses the interest rate for payment math. That is different from the annual percentage rate (APR). The interest rate is the cost of borrowing the principal, while APR is a broader measure that reflects the interest rate plus certain loan fees.

When comparing lender offers: use the contract interest rate to model the scheduled payment, then compare APR, finance charge, amount financed, term and total of payments from the lender's disclosures before deciding which offer costs less overall.

What changes your monthly car payment

Vehicle price: A lower negotiated price reduces the amount that has to be financed.
Down payment: More cash upfront lowers principal, which can reduce both the monthly payment and total interest.
Interest rate: A higher rate raises the cost of financing the same principal over the same term.
Loan term: More months usually lower the required payment, but they can increase total interest and keep you in debt longer.
Taxes and fees: Costs rolled into the loan increase principal. Actual sales-tax treatment, title fees and dealer charges vary by jurisdiction and transaction.
Add-ons: Service contracts, GAP products, warranties and other financed products can raise the amount financed when they are included in the contract.

Shorter term vs. longer term

A longer term can make a vehicle look more affordable because the balance is spread over more payments. The tradeoff is that interest has more time to accumulate. Compare the total loan cost, not only the monthly payment, when weighing different terms.

Term choice	Typical effect on payment	Typical effect on total interest
Shorter term	Higher monthly payment	Usually lower total interest
Longer term	Lower monthly payment	Usually higher total interest

Run the same vehicle price and interest rate at several terms. That isolates the cost of extending the loan and makes the payment-versus-interest tradeoff easier to see.

How to compare auto loan offers

Before signing, compare offers on the same basis. At minimum, review the amount financed, interest rate, APR, loan term, monthly payment, finance charge and total of payments. A lower payment is not automatically a cheaper loan if it comes from stretching the term or financing more add-ons.

It can also help to get financing quotes before visiting the dealership. Banks, credit unions, online lenders and dealer-arranged financing may quote different terms for the same borrower and vehicle.

When refinancing may be worth checking

Refinancing can be worth evaluating when your credit profile has improved, market rates are lower than when you borrowed, or your current payment no longer fits comfortably. The key is to compare the remaining cost of the existing loan with the full cost of the replacement loan rather than focusing on the new payment alone.

If you are evaluating a refinance, use an auto loan refinance calculator to compare the remaining cost of your current loan with a proposed rate, term and refinancing costs.

Important limitations

The calculator assumes a fixed interest rate and equal monthly payments.
Sales tax is estimated from the vehicle price; state rules can treat trade-ins, rebates and other items differently.
It does not model negative equity, trade-in value, rebates, optional products or lender-specific fees separately.
It does not include insurance, fuel, maintenance, registration renewals, parking or other ownership costs.
Actual interest accrual, payment timing, prepayment rules and payoff amounts depend on the loan contract and servicer.

Car loan payment FAQs

Does a lower monthly payment mean a better car loan?

No. A lower payment can result from a lower rate, a smaller amount financed or a longer term. Extending the term can reduce the payment while increasing total interest. Compare the total cost alongside the payment.

Should I enter APR or interest rate?

Enter the contract interest rate in this calculator. Use APR separately when comparing loan offers because APR can include certain finance charges that are not part of the interest-rate input used in a standard amortization formula.

Does this calculator include a trade-in?

No. If you have positive trade-in equity, you can approximate its effect by increasing the down payment. If you owe more than the trade-in is worth, this simplified calculator does not model that negative equity separately.

Can I pay off a car loan early?

Many auto loans allow early payoff, but the contract controls. Review the prepayment terms and ask the lender or servicer how additional payments are applied. Paying principal down faster can reduce interest on many simple-interest loans.