The output includes a comparison with the popular 50/30/20 rule - 50% for needs, 30% for wants, 20% for savings and debt repayment - so you can see where you are over or under. Adjust one category at a time to find the change that actually fits your life, and if a specific debt is the priority, model it with the Credit Card Payoff Calculator.
Calculator
How to use the Monthly Budget Calculator
- Enter your monthly take-home pay after tax.
- Fill in each expense category with your typical monthly figure.
- Check the total spending against income.
- Review the savings rate and the 50/30/20 comparison.
- Adjust categories until the surplus matches your goals.
About this tool
The Monthly Budget Calculator is built for speed and accuracy: every calculation runs in your browser, so your data never leaves your device and the result updates as you type. It works equally well on a phone, a tablet or a desktop, and it is free to use as many times as you like.
Common use cases
- Building a first budget from bank statements.
- Finding categories to cut before a big purchase.
- Setting a realistic monthly savings target.
- Checking whether a rent increase is affordable.
Tips for the best result
- Use the latest figures you have - even a small change in rate or term can shift the outcome by hundreds.
- For annual figures, divide by 12 to get a monthly number you can compare with the result.
- Bookmark this page and revisit the calculation as the inputs change.
Frequently asked questions
Should I use gross or net income?
Use net take-home income. Budgeting with gross pay hides taxes, retirement contributions and deductions that never reach your checking account.
What about irregular annual expenses?
Divide yearly costs such as insurance premiums or car service by 12 and enter the monthly equivalent so the budget reflects them.
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