How much should I put down on a car?

There's no single right amount, but a larger down payment lowers your payment, reduces total interest and helps you avoid owing more than the car is worth. Many shoppers aim for around 20% on a new car and 10% on a used one as a rule of thumb, but any amount helps. Keep an emergency fund rather than emptying savings. On OffLot, you can change the down payment in the financing step and see the payment estimate update.