Plan your monthly budget in under a minute
Enter your income and expenses to see exactly where your money goes. Free, private, and no signup — your data never leaves your browser.
Start budgeting →Your budget
Monthly income
Monthly expenses
50 / 30 / 20 rule
A simple guideline for a healthy budget.
How it works
Add your income
Enter your salary and any side income. Add as many sources as you like.
List your expenses
Rent, food, transport, subscriptions — everything you spend each month.
See the result
Instantly know what's left over and how you compare to the 50/30/20 rule.
Frequently asked questions
Is BudgetCalculator.lat really free?
Yes. It's 100% free with no signup. The site is supported by ads.
Is my financial data safe?
Your numbers never leave your device. Everything is calculated in your browser and saved only in your own browser's local storage.
What is the 50/30/20 rule?
A budgeting guideline: spend about 50% of after-tax income on needs, 30% on wants, and 20% on savings and debt repayment.
Can I use it on my phone?
Yes, the calculator is fully responsive and works on any device.