The best way is to go for cash credit, which is a loan offered by banks and financial institutions to company or entity. Once the bank gets the required security from the company, it gives the freedom of withdrawing money (as mutually agreed and depending on the capability of the company) and meet its requirements. 

With cash credit loan, a company can meet its varied requirements inducing buying of raw materials, purchasing of machineries or buildings. This loan account is pretty much similar to the current account but gives more flexibility and more chances of using excess money than the account holds. In a way, cash credit helps businesses a lot as it gives them money when their account does not have any.