A line of credit is any credit source extended to a government, business or individual by a bank or other financial institution. A line of credit may take several forms, such as overdraft protection, demand loan, special purpose, export packing credit, term loan, discounting, purchase of commercial bills, traditional revolving credit card account, etc. It is effectively a source of funds that can readily be tapped at the borrower’s discretion. Interest is paid only on money actually withdrawn.