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📋 Budget Calculator

Monthly Budget Calculator

Enter your monthly take-home pay and expenses to see where your money is going, how it compares to the 50/30/20 rule, and whether you have a surplus or shortfall.

Needs (50% Target)

Wants (30% Target)

Savings (20% Target)

Monthly Surplus/Deficit
Budget Health Score
Health Label
Total Income
Total Expenses
Annual Surplus/Deficit Projection

50/30/20 Breakdown

Category Amount Your % Target % Status
Estimate only. Not financial advice.
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Understanding the 50/30/20 Rule

The 50/30/20 rule is a simple yet powerful budgeting strategy popularized by Senator Elizabeth Warren in her book, "All Your Worth: The Ultimate Lifetime Money Plan." It divides your after-tax income into three distinct categories:

  • Needs (50%): Essential expenses you must pay to live and function, such as housing, groceries, basic utilities, insurance, and minimum debt payments.
  • Wants (30%): Non-essential spending that enhances your lifestyle, including dining out, entertainment, hobbies, vacations, and subscription services.
  • Savings & Debt (20%): Money allocated toward securing your financial future, such as building an emergency fund, investing for retirement, or making extra payments to eliminate debt faster.

Tracking your budget is crucial because it reveals exactly where your money goes and highlights areas for improvement. If you discover a monthly surplus, you can strategically direct those funds toward accelerating debt payoff, padding your emergency savings, or investing for long-term growth. On the other hand, if you're operating at a deficit (spending more than you earn), you must take immediate action. Start by evaluating your "wants" category and eliminating non-essentials. Then, scrutinize your "needs" to see if you can lower bills through negotiation, refinancing, or lifestyle adjustments, and finally, look for opportunities to increase your income.

LedgerlyTools calculators use standard financial formulas — the same math financial advisors use. We're developers, not financial advisors. Results are estimates. See our methodology →

Frequently Asked Questions

What is the 50/30/20 rule?

The 50/30/20 rule is a budgeting method popularized by Elizabeth Warren. It suggests allocating 50% of your take-home pay to needs, 30% to wants, and 20% to savings and debt repayment.

What counts as a 'need' vs a 'want'?

Needs are essential expenses like housing, groceries, basic utilities, transportation to work, and insurance. Wants are non-essential items like dining out, entertainment, subscriptions, and hobbies.

What should I do with my monthly surplus?

A monthly surplus can be directed toward building an emergency fund, accelerating debt payoff, investing for retirement, or saving for specific financial goals.

My expenses exceed my income — where do I start?

Start by identifying and reducing 'wants' such as dining out and subscriptions. Next, evaluate 'needs' for potential savings (like renegotiating insurance or lowering utility usage), and consider strategies to increase your income.