Free Zero-Based Budget Calculator
Assign every dollar of your monthly income to a named category — needs, wants, savings, or debt — until the balance reaches exactly zero. The most thorough budgeting method available.
Zero-Based Budget Calculator
Mr B says: The goal is to get the remaining balance to exactly zero — not by spending more, but by giving every dollar a deliberate job. Savings and investing count as assigned categories.$
| Category | Type | Amount |
|---|
Zero-based budget summary
Monthly income—
Total assigned—
Remaining (target: $0.00)—
⚠️ This tool is for general guidance only and is not financial advice.
Common questions
Zero-based budgeting questions
Zero-based budgeting means assigning every dollar of your income to a specific category — needs, wants, savings, or debt — so that income minus all assignments equals exactly zero. Unlike percentage-based rules, every dollar has a named purpose before the month starts. 'Zero' is the target, not the outcome of overspending.
The 50/30/20 rule gives you percentage guidelines for broad categories. Zero-based budgeting assigns specific dollar amounts to specific named categories. Zero-based is more detailed and requires more effort, but gives you much tighter control and visibility over exactly where your money goes each month.
Cover all four types: needs (rent, groceries, utilities, transport, insurance), wants (dining, subscriptions, entertainment, clothing), savings (emergency fund, retirement, goals), and debt repayment. Make sure every dollar is accounted for — including irregular expenses like annual bills, which you can break into monthly contributions.
Budget based on your lowest expected monthly income. In months where you earn more, assign the extra to savings, debt, or an irregular expenses fund. If your income is highly variable, budget conservatively and treat any surplus as a deliberate category to assign — not a windfall to spend unplanned.