Definition
A method where every dollar of income is assigned a job (spending, saving, or debt) until income minus assignments equals zero. Maximum clarity, maximum maintenance.
Why it matters
Zero-based budgeting finds leaks nothing else finds, because unassigned money is impossible by design. The cost is maintenance: it is the most powerful method and the easiest to abandon.
Example
A $4,700 paycheck gets fully assigned: $2,300 to needs, $900 to wants, $700 to savings, $500 to extra debt payments, and $300 to sinking funds. Income minus assignments equals exactly zero, so a forgotten $200 cannot hide.
Put it into practice
Related terms
This definition is educational, not financial, legal, or tax advice. U.S. rules and limits change; verify time-sensitive details with official sources. See our disclaimer.