Last updated: August 6, 2026
Free Budget Calculator
This calculator applies the zero-based budgeting method — enter your income and your planned spending in each category, and it shows you exactly how much is left unassigned. The goal is to get that remaining number to zero, meaning every dollar has a job. See our full zero-based budgeting guide for the complete method this tool is built around.
How to Use This Calculator
- Enter your monthly take-home (after-tax) income.
- Fill in a planned amount for each category — the default list covers common categories, but you can rename any of them or add more with the "+ Add category" button.
- Watch the "Remaining to assign" number at the bottom. The goal is $0 — every dollar of income assigned to a specific job.
- If the number is negative, you've planned more spending than you actually have — reduce a category. If it's positive, assign the leftover to savings, debt payoff, or a specific goal rather than leaving it unassigned.
Why Zero Is the Target, Not a Coincidence
A zero-based budget doesn't mean spending everything — it means every dollar, including savings and debt payoff, has an assigned category before you consider anything "extra." If this calculator shows money left over, that's not free money to spend casually; it's a signal that you haven't finished assigning your budget yet. See our complete zero-based budgeting guide for the full method, including how to handle irregular expenses with sinking funds.
Common Categories People Forget
Beyond the default categories in this calculator, a few commonly overlooked ones are worth adding: irregular expenses like car maintenance or annual subscriptions (see our sinking funds guide for how to handle these specifically), pet care, and a genuine "miscellaneous" buffer category for the small purchases that don't fit anywhere else but add up over a month. Leaving these out is one of the most common reasons a budget looks balanced on paper in this calculator but doesn't match reality once the month actually happens.
What to Do With the Number
| Result | What It Means |
|---|---|
| Exactly $0 | Every dollar has a job — this is the target |
| Positive number | You have unassigned income — direct it to savings, debt, or a specific sinking fund category |
| Negative number | Your planned spending exceeds your income — reduce a category or find additional income |
Frequently Asked Questions
Does this calculator save my data?
No — this tool runs entirely in your browser. The numbers you enter aren't sent to or stored on our servers. See our Privacy Policy for more on how ClearCents handles data generally.
Can I add more categories than the default list?
Yes — use the "+ Add category" button to add as many rows as you need, and rename any existing category by editing its text field directly.
What should I do if I can't get to zero?
If your planned spending consistently exceeds your income, it's worth reviewing which categories are inflated relative to your actual needs, or looking into additional income — see our guide to making extra money for options.
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Where to Go Next
Related guides on ClearCents:
Build the Habit, Not Just This Month's Budget
Run this calculator every time your income or expenses change, not just once. A budget that stays accurate over time is worth far more than a perfect one-time snapshot.
Want the full method behind this calculator? Our complete zero-based budgeting guide walks through the reasoning step by step.