Car Loan Calculator

The Car Loan Calculator is a free online tool that calculate monthly car payments with down payment, trade-in, sales tax, apr, and term. full amortization schedule and csv export.. It runs entirely in your browser with no installation or sign-up needed.

Standard amortization: M = P x r x (1+r)^n / ((1+r)^n - 1), where P is the financed amount (price - down - trade-in + tax), r = APR/12, n = months.

We apply sales tax to price minus trade-in, matching most US states with a trade-in tax credit. If your state taxes the full price, set trade-in to 0 and add it to down payment.

Longer terms (72-84 months) lower monthly payments but greatly increase total interest and raise the risk of going underwater. Compare total interest in the amortization table.

Yes, the Car Loan Calculator is 100% free with no registration, no hidden fees, and no usage limits. All processing happens locally in your browser, ensuring complete privacy.

Absolutely. The Car Loan Calculator processes everything client-side in your browser. No data is uploaded to or stored on any server. Your content remains private on your device at all times.

Yes, the Car Loan Calculator is fully responsive and works on smartphones and tablets. You can use it on any device with a modern web browser -- no app download required.

No account or registration is needed. Simply open the Car Loan Calculator in your browser and start using it immediately. There are no sign-up walls or usage restrictions.

The Car Loan Calculator uses industry-standard formulas and algorithms to ensure accurate results. However, for critical financial or medical decisions, always consult a qualified professional.

Simply enter your input in the provided field, adjust any settings to your preference, and the tool will process it instantly. You can then copy the result to your clipboard or download it.

A common rule of thumb is roughly 20% down on a new car and around 10% on a used one, which helps you stay ahead of the steep depreciation that hits in the first few years and reduces the chance of going "underwater" — owing more than the car is worth. A larger down payment shrinks the amount financed, so you pay less total interest and may qualify for a better rate. There is no single right number, though; the goal is a monthly payment and total cost that fit your budget. In this calculator you can enter the down payment as a dollar amount or as a percentage of the price and toggle between them, then watch the financed amount, monthly payment, and total interest update instantly so you can test what each down payment actually buys you.

The interest rate is the cost of borrowing the principal, expressed as a yearly percentage. The APR (annual percentage rate) is a broader figure that, by law, folds the interest rate together with certain lender fees, so it usually sits slightly higher than the base rate and is the better number for comparing offers apples-to-apples. On a simple-interest auto loan with no extra financed fees, the two can be identical. Lenders generally reserve their lowest advertised APRs for borrowers with strong credit, and a quoted rate can swing several percentage points with your credit score. This calculator asks for the APR and divides it by 12 to find your monthly rate, then builds the payment and full amortization schedule from it — enter the exact APR a lender quoted to see what that rate really costs over the life of the loan.

A widely used guideline is the 20/4/10 rule: put about 20% down, finance for no more than 4 years, and keep total monthly vehicle costs — payment plus insurance and fuel — under 10% of your gross monthly income. Some lenders instead look at total debt, aiming to keep all your monthly debt payments below roughly 36% of income. These are starting points, not hard limits; your real budget depends on rent, savings goals, and other obligations. Rather than guess, work backward: pick a payment you're comfortable with, then adjust the price, down payment, APR, and term in this calculator until the monthly figure lands there. Because it also shows total interest and the full amortization schedule, you can confirm the loan that fits your monthly budget isn't quietly costing you thousands more over its life.

On an amortizing loan, each fixed payment is split between interest and principal, and interest is charged on the remaining balance. Early on that balance is at its highest, so the interest portion is large and only a small slice goes toward principal. As the balance shrinks month by month, the interest charge falls and the principal share of each identical payment grows, accelerating toward the end of the term. This is why paying a loan off early or making extra payments saves the most interest when done sooner. The amortization schedule in this calculator shows that split for every month — principal paid, interest paid, and the balance afterward — and rolls long loans into a year-by-year summary so you can see the payoff curve at a glance. You can also export the full schedule as a CSV to study it in a spreadsheet.

Dealers often make you choose between a cash rebate and a special low (sometimes 0%) APR, and the cheaper option depends on the numbers, not the headline. A rebate lowers the price you finance, while low-APR financing cuts the interest on whatever you borrow. As a rule, the rebate tends to win on shorter terms or smaller balances where there's little interest to save, and the low APR tends to win on larger, longer loans. The only reliable way to know is to compute both. Run one scenario in this calculator with the rebate subtracted from the vehicle price at the standard APR, then a second scenario at full price with the promotional APR, and compare the total paid and total interest for each. Whichever produces the lower grand total is the better deal for your situation.