If you’re a small business owner, it might feel counterintuitive to have a business checking account with the goal of keeping a $0 balance. But that’s actually the whole point of a Zero Balance Account: You use that dedicated checking account to fund a specific expense, such as payroll, departmental spending, petty cash, travel reimbursement, or any other business need. Funds are sent to a particular Zero Balance Account only when necessary to cover checks or debits. At the end of every day, any money in the Zero Balance Account is transferred back to the primary account.