How Much Should You Put Down on a Car?

By Xavier E. · Updated October 5, 2026

The usual advice is to put 20% down on a new car. Here's what that actually changes, what happens with less, and when keeping your cash is the smarter move.

Short answer: aim for about 20% down on a new car (10% or more on a used one), or at least enough to cover the sales tax and fees. That keeps your payment and interest down and means you don't owe more than the car is worth the day you drive it away. Don't empty your emergency fund to get there.

What different down payments do

Take a $35,000 car with 7% sales tax and $1,500 in fees rolled into a 60-month loan at 6.5% APR:

Down payment	Amount financed	Monthly payment	Total interest	Owed after 1 year
0% ($0)	$38,950	$762.10	$6,776	$32,136
10% ($3,500)	$35,450	$693.62	$6,167	$29,248
20% ($7,000)	$31,950	$625.14	$5,558	$26,361

Putting 20% down instead of nothing lowers the payment by $136.96 a month and saves $1,218 in interest. Every dollar you put down is a dollar you don't pay interest on.

Why zero down can leave you underwater

With nothing down and tax and fees rolled in, you borrow $38,950 for a $35,000 car, so you owe more than the price before you leave the lot. New cars also lose value quickly in their first years. After a year you'd still owe $32,136, likely more than the car would sell for.

Owing more than the car is worth is called negative equity. It matters if the car is totaled (insurance pays its value, not your balance) or if you want to trade it in early (the shortfall gets added to your next loan). If you do put little down, consider gap insurance, and avoid stretching the loan to a long term on top of it. See the guide to 72- and 84-month loans.

At least cover tax and fees

If 20% isn't realistic, paying the sales tax and fees up front is a good minimum. In the example above, paying them in cash with no other down payment means financing $35,000 instead of $38,950, with a payment of $684.82. Unticking "Roll taxes and fees into the loan" in the calculator shows the difference for your own numbers.

Down payment vs. trade-in

A trade-in works like a down payment, with one difference: in most states it also lowers the sales tax, because tax is charged on the price minus the trade-in. A cash down payment doesn't reduce the tax anywhere. Some states don't give a trade-in tax credit at all; see which states tax trade-ins.

When a smaller down payment makes sense

You have a 0% or very low promotional APR. Borrowing costs little, so your cash may do more in savings.
It would drain your emergency fund. A car loan is cheaper than a credit card balance after an unexpected bill. Keep a cushion.
You have higher-interest debt. Paying off a credit card at a much higher rate than your car loan saves more than a bigger down payment would.

Try it with your own numbers: Auto loan calculator →

Figures in this guide come from the same code that runs the calculators. They're estimates, not financial advice; your lender's numbers are final. How the calculators work.