Answer: Enter the amount, rate, and term and the Car Payment Calculator returns your exact periodic payment with a full amortization breakdown of principal versus interest.
A car payment calculator computes monthly auto-loan repayments from vehicle price, deposit, trade-in, interest rate, and loan term.
Estimate your monthly car payment
The calculator subtracts your down payment from the price, then amortizes what's left over the loan term. The formula is M = P × [r(1+r)^n] / [(1+r)^n − 1], where P is the amount financed, r is the monthly rate (APR ÷ 12), and n is the number of months. It's the same math as a mortgage, just compressed into a few years. Trading in a car? Add its equity to the down payment field, since the loan only needs to cover what's left after it. And if you've landed a 0% promotional rate, the math collapses to the financed amount divided by the months, which the calculator handles as well.
Using the defaults: a $30,000 car with $3,000 down leaves $27,000 to finance. At 7% APR over 60 months, the payment comes out to $534.63. Over the five years you'll pay $5,077.94 in interest, so the financed portion costs $32,077.94, and the car costs about $35,078 all-in once the down payment is counted. That's roughly 17% over sticker, before tax, fees, insurance, or fuel enter the picture.
Same $27,000 loan at 7% APR across the four terms in the dropdown:
| Term | Monthly payment | Total interest | Total paid |
|---|---|---|---|
| 36 months | $833.68 | $3,013 | $30,013 |
| 48 months | $646.55 | $4,034 | $31,034 |
| 60 months | $534.63 | $5,078 | $32,078 |
| 72 months | $460.32 | $6,143 | $33,143 |
The 72-month loan looks friendliest at $460 a month, $373 less than the 36-month payment. It also costs $3,131 more in interest, and it keeps you exposed longer: new cars lose roughly 20% of their value in the first year, so a small down payment plus a long term often means owing more than the car is worth for years. If the only way a car fits your budget is a 72-month term, that's usually the car telling you something.
On this same $27,000 loan over 60 months, a 4% APR means $497.25 a month and $2,835 in total interest. At 11% it's $587.05 and $8,223. Same car, same term, and the rate gap costs $5,388, about ninety dollars a month. Your rate tracks your credit tier, so a few months spent cleaning up your credit before you shop can be worth more than any sticker negotiation. And get preapproved at a bank or credit union first: it gives the dealership's finance office a number to beat, and it short-circuits the "what monthly payment are you looking for?" routine, which is designed to hide the total cost inside a longer term.
The old rule of thumb says put at least 20% down, finance for no more than four years, and keep total car costs, meaning payment, insurance, and fuel together, under 10% of your gross income. Few buyers hit all three, but each one pulls in the right direction. Doubling the default down payment to $6,000 drops the payment to $475.23 and trims interest to $4,514. The bigger win is the equity cushion: starting with more equity means depreciation can't shove you underwater the first time you hit a rough patch.
The payment is only part of owning the car, too. Insurance can run well over $100 a month (our guide on why car insurance costs so much breaks down what drives premiums), and the fuel cost calculator will price out your commute before you commit.
No. Sales tax, title, registration, and dealer doc fees come on top of the sticker price, and dealers usually offer to roll them into the loan. If that's your plan, add your estimate of those costs to the car price field so the payment reflects what you'll actually finance. On a $30,000 car they can easily add $2,000 to $3,000 depending on your state; the sales tax calculator covers the biggest piece.
It's expensive and it's risky. Stretching this loan from 36 to 72 months cuts the payment by $373 but adds $3,131 in interest, and cars depreciate fastest in exactly the years when a long loan has barely dented the principal. That's how people end up underwater, owing more than the car is worth. If you do go long, gap insurance is worth pricing.
A common target is 20% on a new car and 10% on a used one. At minimum, put down enough to cover taxes, fees, and the first year's depreciation so you're never underwater. Trade-in equity counts toward this. Lenders also weigh your existing debts; the DTI calculator shows how the new payment fits your debt-to-income ratio.
It depends on your credit tier, the term, and whether the car is new or used; used-car rates typically run several points higher. Borrowers with strong credit have recently seen new-car rates in the 6 to 7 percent range, while subprime used-car loans can run into the high teens. Manufacturer 0% promotions are real but usually replace a cash rebate, so run both versions through the calculator and compare totals.