Watcharu Finance

Auto Loan Calculator

Your payment depends on more than price and rate. Trade-in equity, sales tax rules, and fees all move the amount financed.

$680.29 / month

Amount financed
$33,950
Sales tax
$2,450
Total interest
$6,867
Balance over MonthBalance ends near $0 at 60.$0$8k$17k$25k$34k01224364860Month

How it works

Most states tax the price minus the trade-in. Sales tax and fees are added to the price, then the down payment and trade-in equity are subtracted to get the amount financed.

Explain it to a kid

Cars are expensive, so most people borrow money from a bank to buy one and pay it back over a few years, plus a little extra called interest. The less you borrow and the shorter you take to pay it back, the less extra you end up paying overall.

Frequently asked questions

How is a car loan payment calculated?
The amount financed is the vehicle price plus sales tax and fees, minus your down payment and trade-in equity. That amount is amortised over the loan term at the APR to get a fixed monthly payment.
Does a trade-in reduce sales tax on a car?
In most states, yes — sales tax is charged on the price after the trade-in allowance. A handful of states (including California, Hawaii, Kentucky, Maryland, Michigan, Virginia, and DC) tax the full price with no trade-in credit. Pick your state page for the local rule.
What term should I choose for a car loan?
Shorter is cheaper overall. A 72- or 84-month loan lowers the payment but adds interest and keeps you 'upside down' — owing more than the car is worth — for longer. Many buyers aim for 48–60 months with at least 10–20% down.
What fees are added to the amount financed?
Typically title and registration fees and a dealer documentation ('doc') fee, plus sales or use tax. The calculator lets you enter tax and fees separately so you can match a specific quote.

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