Budget Calculator

Build your monthly budget by entering income and expense categories. See your surplus or deficit instantly, and compare to the recommended 50/30/20 budgeting rule.

Monthly Budget Calculator
Monthly Expenses

The 50/30/20 Rule

The 50/30/20 budgeting rule, popularized by Senator Elizabeth Warren, divides after-tax income into three categories: 50% for needs (housing, food, utilities, insurance), 30% for wants (dining out, entertainment, hobbies), and 20% for savings and debt repayment. This simple framework helps ensure you're saving while still enjoying life.

Average American Monthly Budget

CategoryAvg Monthly Spending% of Income
Housing$1,78432%
Transportation$1,02518%
Food$77914%
Healthcare$4528%
Entertainment$3476%
Savings~$5009%

Frequently Asked Questions

How do I start a budget?+
Start by tracking all income sources and every expense for one month. Categorize spending into needs, wants, and savings. Then compare totals to your income and identify areas to cut back.
What if my expenses exceed income?+
Prioritize cutting discretionary expenses (wants) first. Review subscriptions, dining out, and entertainment. If needs exceed income, look for ways to increase income or reduce fixed costs like housing or transportation over the longer term.

About the Budget Calculator

This free budget calculator helps you get accurate results instantly without needing to work through the math manually. Whether you need a quick estimate or a precise figure, having a reliable tool on hand saves time and reduces errors compared to manual calculation.

How to Use This Calculator

  1. Enter your values in the input fields above. Each field is labeled to guide you.
  2. Double-check your inputs — results are only as accurate as the numbers you enter.
  3. Click the Calculate button to see your result instantly.
  4. Use the result for your planning, budgeting, or decision-making.

Why Accurate Calculations Matter

Small errors in financial calculations can compound into significant problems. A 1% miscalculation in a budget or measurement can translate to hundreds or thousands of dollars in wasted resources, or result in having to redo work entirely. This calculator uses the standard formulas and methods to give you reliable results you can trust.

Tips for Getting the Best Results

Frequently Asked Questions

Is this calculator free? Yes — completely free with no account, login, or payment required. Use it as many times as you need.

How accurate are the results? This calculator uses the standard formulas for budget calculations. Results are accurate for typical use cases. For specialized or high-stakes applications, consult a professional.

Does it work on mobile? Yes. This calculator is fully responsive and works on smartphones, tablets, and desktops.