Use our auto loan calculator to estimate your monthly car loan payments ... guess at your sales tax and loan interest. These two factors can greatly change your monthly payment.

Here's why some car buyers live by the 20% rule when purchasing a new vehicle and how you can use it to your advantage.

In the midst of rising car prices and interest ... which means you've broken the contract," says Gelinas. "This is usually in the range of 30 to 90 days of non-payment, depending on state laws ...