Zero Based Account (ZBA) -  Is often used in relation to a checking account.  This is where a person/business may only transfer money from a savings account to the checking account when a cheque has been written

Zero Based Budget (ZBB) - This is a budgeting method where the budget starts at zero and each item must be justified before it is included in the budget. 

Zero-based budgeting - A system of budgeting where no money is allocated for costs or spending unless they can be justified by the fund holder (the items are given a 'zero' value).

Zero rated - This is the term given to goods on which the buyer does not have to pay value added tax (value added tax (VAT)) even though the seller is able to claim tax that they paid.