Budget Calculator

The 50/30/20 rule divides your after-tax income into three categories: 50% for needs (housing, utilities, groceries, minimum debt payments, transportation to work), 30% for wants (dining out, entertainment, hobbies, subscriptions), and 20% for savings and extra debt payoff. It is a simple framework for anyone starting to budget. High-cost-of-living areas often require adjusting the needs category to 60% or more.

Budget based on your lowest expected monthly income over the past 12 months, treating that as your base. In months where you earn more, direct the surplus to savings or debt payoff rather than lifestyle spending. Self-employed and freelance workers benefit from building a larger emergency fund (6-9 months of expenses) to smooth out income variability.

Common forgotten expenses include annual or semi-annual bills like car registration, property taxes paid separately from a mortgage escrow, subscriptions that auto-renew yearly, holiday and gift spending, car maintenance and tires, medical copays, and home or renter's insurance. Divide annual expenses by 12 and include that monthly amount in your budget so these costs do not surprise you.

Most people need 2-3 months before a budget feels accurate, because irregular expenses always appear in the first few cycles. The first month often reveals forgotten spending categories. By month three, you have enough data to set realistic category limits. Track every transaction for the first month to identify where your money actually goes, not where you think it goes.