A business line of credit is a "revolving" account like a credit card. Unlike the plastic in your wallet, though, you can use your business line of credit like cash. For example, you could use it to pay off other, higher interest debt, or to pay for a renovation of your office space. You can use it to invest in new equipment or technology, and you get peace of mind knowing it's there in case of an emergency or unanticipated expense.