Zero-Based Budgeting
A budgeting method where every dollar of income is assigned a purpose, so income minus expenses equals zero.
Zero-based budgeting (ZBB) requires you to justify every expense from scratch each month, rather than basing it on the previous month. Every dollar gets a job — whether it's rent, groceries, savings, or debt repayment. This approach is used by apps like YNAB (You Need A Budget) and is highly effective for people who want maximum control over their money. The key benefit is eliminating "unaccounted" spending that quietly drains your finances. It does require more effort than percentage-based rules, but yields greater financial awareness.
Example
Monthly income: $5,000. You assign $1,500 to rent, $600 to groceries, $200 to transport, $300 to entertainment, $400 to insurance, $1,000 to savings, $500 to investments, and $500 to debt — totaling exactly $5,000.
Related terms
50/30/20 Rule
A budgeting guideline that allocates 50% of after-tax income to needs, 30% to wants, and 20% to savings and debt repayment.
Envelope Method
A cash-based budgeting system where money is divided into physical or virtual envelopes, each assigned to a specific spending category.
Cash Flow
The net amount of money moving in and out of your accounts over a given period — positive when income exceeds expenses, negative when it doesn't.
Fixed vs Variable Expenses
Fixed expenses remain constant each month (rent, subscriptions), while variable expenses fluctuate based on usage or behavior (groceries, dining, fuel).