Use this free online budget calculator to compare your monthly income against your expenses across custom categories like rent, food, and transportation. Add or remove categories as needed to see your total expenses, remaining surplus or deficit, and a percentage breakdown of where your income goes.
Expense Categories
How to Use the Budget Calculator
Enter your take-home pay in the "Monthly Income" field.
Fill in a label and amount for each row under "Expense Categories" (e.g. Rent/Housing, Food).
Use "Add Category" to add more expense rows, or the × button to remove one.
Click "Calculate Budget" to see your total income, total expenses, and remaining surplus or deficit.
Check the "Breakdown" table to see what percentage of your income each category consumes.
Frequently Asked Questions
It adds up the amounts in every expense category to get your total expenses, then subtracts that from your monthly income. If the result is positive it's labeled "Savings/Surplus"; if it's negative, it's labeled "Deficit" and shown as a positive amount.
Yes. The calculator starts with common categories like Rent/Housing, Food, Transportation, Utilities, Entertainment, and Savings, but you can rename any of them, add new rows with "Add Category," or remove rows you don't need (at least one category must remain).
Each category's percentage is its amount divided by your monthly income, multiplied by 100. If your monthly income is zero, this column shows "N/A" for every category since the percentage can't be calculated.
Yes, it's completely free with no sign-up required, so you can rework your monthly budget as often as you like.