Budget Calculator
Track monthly income and expenses with this free budget calculator. See how much you have left after bills — instant results online.
Last updated: 10 October 2026
Track monthly income against expenses and see what is left, with a visual progress bar. A $4,500 income against $3,200 of expenses across six categories showed $1,300 remaining — a 28.9% surplus.
Budget Calculator
Expenses
Worked Examples
Tested budget
- $4,500 monthly income, $3,200 across 6 expense categories
- Remaining: $1,300 (28.9% surplus), shown on a green progress bar
- Categories roll up live as amounts are edited
The 50/30/20 rule
- Needs 50%: rent, utilities, groceries, transport.
- Wants 30%: dining out, subscriptions, hobbies.
- Savings 20%: emergency fund, investments, extra debt payments — treat this as a floor, not a target.
About Budget Calculator
Track your monthly income and expenses to see how much money you have left. Add income sources and expense categories, then calculate your budget usage with a visual progress bar. We tested with a $4,500 monthly income and $3,200 in expenses across 6 categories — the calculator showed $1,300 remaining (28.9% surplus) with a green progress bar, accurately reflecting the 50/30/20 rule breakdown.
Limits: Does not save data between browser sessions — results are lost on page close; No recurring transaction tracking or historical budget comparison; Does not account for irregular expenses (annual subscriptions, quarterly taxes); Currency conversion between income and expenses is not supported
Who Uses This Tool
- A freelancer mapping out monthly income from 3 clients against fixed expenses to find their savings rate
- A recent graduate applying the 50/30/20 rule to a first job salary of $3,800/month
- A couple combining two incomes and shared expenses to see their joint financial picture
Key Features
- Add unlimited expense categories
- Visual budget progress bar
- Over-budget warnings
- Works with any currency
- Multiple income sources
How to use Budget Calculator
- Enter your income source name and monthly amount.
- Add expense categories with their amounts.
- Click 'Calculate Budget' to see totals and remaining balance.
How It Compares
Unlike Mint or YNAB which require account creation and bank linking, this tool requires no sign-up and keeps your financial data entirely private. It provides a quick monthly snapshot — ideal for people who want a simple calculator without a full budgeting platform.
Privacy & Security
Because processing happens directly in your browser, your files and input are not uploaded to our servers.
Written and checked by Mohammad Sohail
Budget figures re-checked on 10 October 2026 with the sample income and expenses.
About FreeDigitalToolkit →Frequently Asked Questions
How do I use the 50/30/20 rule?
Allocate 50% of income to needs (housing, food, transport), 30% to wants (entertainment, dining), and 20% to savings and debt repayment.
What if I'm over budget?
The calculator shows a red warning when expenses exceed income. Review your expense categories and identify areas to reduce spending.
Can I add multiple income sources?
Yes. Add as many income sources as you need — salary, freelance, investments, etc.
Does it track spending over time?
No. This is a one-time monthly snapshot calculator. For ongoing tracking, consider a dedicated budgeting app.
Can I save my budget data?
No. Data is processed in your browser only and is not saved between sessions. For persistence, copy the results to a spreadsheet.
Related Tools
Browse all Calculator Tools or explore our full collection of 86 free tools.