Zero-based budgeting

Zero-based budgeting is a budgeting approach in which managers begin with a budget of zero and must justify every dollar put into the budget.

Definitions

According to Managerial Accounting by Braun, Tietz (5th edition),

Zero-based budgeting. A budgeting approach in which managers begin with a budget of zero and must justify every dollar put into the budget.

According to the HRBoK Guide,

Zero-based budgeting. An approach to financial planning and decision making. A budgeting process that requires that every budget item is approved instead of only budget changes being approved. No reference is made to previous budget expenditures.