Monthly Budget Calculator

Monthly Budget Calculator to track income, expenses, and savings

This Monthly Budget Calculator helps you see your full monthly picture in one place. Enter your take home income and main expense categories to see your total income, total expenses, and whether you have a surplus or a shortfall each month.

The calculator groups your spending into housing, utilities, groceries, transport, insurance, debt, savings, entertainment, and other items. It then shows how much of your income goes to essential costs, how much goes to savings and investments, and how much is left over at the end of the month.

Use the results to adjust your budget, set savings targets, or check if a new expense such as a loan or subscription will still fit within your existing cash flow.

Assumptions and how to use this calculator

• All numbers are treated as monthly amounts in the same currency. You can use any currency symbol you like as long as you are consistent across income and expenses.
• The calculator assumes your income and expenses are stable from month to month. Irregular or once off items should be converted to a monthly average if you want to include them.
• Essentials include housing, utilities, groceries, transport, insurance, and debt repayments. Savings and investments are reported separately so you can see how much you are paying your future self.
• If you leave a field blank, the calculator treats it as zero. It is better to enter rough estimates than leave important categories out completely.
• Results are for planning only and do not replace formal financial advice. Always consider your own situation before making major decisions.

Common questions

What does the surplus or shortfall number mean?

The surplus is the amount of money left after all listed expenses are paid. A positive surplus means you have money left to save or spend. A negative number means your expenses are higher than your income and your budget is in deficit.

How accurate is this Monthly Budget Calculator?

The results are only as accurate as the numbers you enter. If you include your main income and all regular expenses, the calculator gives a realistic view of your monthly position. If you guess or leave out key items, the picture will be less reliable.

Should I include debt repayments and savings as expenses?

Yes. Debt repayments are cash that leaves your account every month, so they must be included. Savings and investments are also included to show how much of your income you are putting aside for the future. The calculator reports both so you can see the balance between current spending and long term goals.

What if my income changes from month to month?

If your income is variable, you can enter an average based on the last few months or a cautious lower figure that you are confident you will earn. Some users run the calculator more than once to see a best case and worst case budget.

How can I use this calculator to improve my budget?

Start by entering your current numbers to see your baseline. Then adjust one category at a time, such as entertainment or other expenses, to see how changes affect your surplus and savings rate. This helps you decide where to cut back and which savings targets are realistic.