A Zero Balance Account (ZBA) is a checking account in which a balance of zero is maintained by automatically transferring funds from a master account in an amount only large enough to cover expenses.
The ZBA service is designed for businesses that maintain a general operating account and separate accounts for payroll, petty cash, or other purposes. With ZBAs in place, all of the company's funds are concentrated into a single account. Disbursements are made from subsidiary accounts, which always maintain a zero balance. This account system allows the company increased investment opportunities and reduces administrative expenses.