A line of credit (LOC) is a preset borrowing limit that can be tapped into at any time. The borrower can take money out as needed until the limit is reached. As money is repaid, it can be borrowed again in the case of an open line of credit. An LOC is an arrangement between a financial institution—usually a bank—and a customer that establishes the maximum loan amount that the customer can borrow. The borrower can access funds from the LOC at any time as long as they do not exceed the maximum ...