Revolving credit facilities, like overdrafts, provide a pre-approved source of financing that may be used whenever needed. However, with a revolving credit facility, the lender seldom requires a special account for collections and money may be routed wherever it is needed. Providers only charge interest on amounts drawn, so the account may lie inactive for a few weeks yet be ready to go at any time, revolving credit remains a source of trading cash rather than a serious acquisitions facility