Budget Calculator
Enter your monthly income and expenses by category. The calculator shows total expenses, surplus or deficit, savings rate, emergency fund targets (3 and 6 months of expenses), estimated months to reach them, and a 50/30/20 comparison so you can see how your needs, wants, and savings stack up.
Monthly budget
How it works
Total expenses = sum of all expense categories. Net = income − total expenses. Savings rate = (surplus ÷ income)×100 when income > 0. Emergency fund targets: 3× and 6× monthly expenses. Months to reach = target ÷ surplus (when surplus > 0). For 50/30/20 we treat needs = housing + utilities + transportation + food + insurance + debt payments; wants = other; savings = surplus. We compare your percentages to 50% needs, 30% wants, 20% savings.
When to use it
Use it at month start to set targets or at month end to review. See if you're over in needs or wants and how close you are to a 3- or 6-month emergency fund. Pair with debt-payoff or savings-goal tools for next steps.
Frequently asked questions
What counts as income?
Enter take-home pay and any other regular monthly income (side gig, rent received, etc.). Use after-tax amounts for a realistic picture.
Should I include savings as an expense?
Savings is a separate field. We treat surplus (income − expenses) as savings and show savings rate. You can add a savings goal in Other or leave it for the surplus number.
How is 50/30/20 applied?
Needs = housing, utilities, transportation, food, insurance, debt. Wants = other. We compare your share of income in each to 50% needs, 30% wants, 20% savings.