A car loan (also known as an automobile loan, or auto loan) is a sum of money a consumer borrows in order to purchase a car. Generally speaking a loan is an amount of money that is lent to an individual, a business, or another entity. The party that lends the money is known as the lender, while the party borrowing the money is called the borrower. When taking out a loan a borrower agrees to pay back the full loan amount, as well as any interest (a percentage of the loan amount, usually calculated on an annual basis), by a certain date, typically by making monthly payments. Car loans follow most of the same rules and procedures that apply to other loans.