Free Budget Calculator
A budget is just a plan for every dollar before the month starts. Enter your take-home pay and spending by category to see your surplus, your 50/30/20 targets, and exactly where the plan breaks.
This free budget calculator compares your spending to the 50/30/20 rule: 50 percent needs, 30 percent wants, 20 percent savings. For example, $5,000 monthly take-home targets $2,500 for needs, $1,500 for wants, and $1,000 for savings and debt payoff. Enter your actual numbers to see your surplus and which category is over target.
Estimates only. Use take-home pay after taxes and deductions for the most useful budget. This tool does not store your data. Not financial advice.
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How budget math works
Start with monthly take-home pay, the amount that actually lands in your account. Every dollar gets assigned to needs, wants, or savings before the month begins. The 50/30/20 rule is the classic split: half for needs like housing and groceries, 30 percent for wants like dining out, 20 percent for savings and extra debt payments.
The surplus is the number that matters: income minus all spending. A positive surplus gets routed to savings or debt; a negative one means the plan needs cuts. Most budgets fail not from bad math but from untracked small spending, which is why the calculator breaks expenses into categories.
Zero-based budgeting is the stricter alternative: income minus every planned expense equals zero, with savings treated as an expense paid first. It takes more effort but catches the leaks that percentage rules miss.
Budget questions
What is the 50/30/20 budget rule?
Needs are housing, utilities, groceries, transport, insurance, and minimum debt payments. Wants are dining out, entertainment, hobbies, and upgrades. The 20 percent covers emergency savings, investing, and extra debt payments beyond minimums. High-cost areas may need a 60/20/20 remix.
How do I make a budget for the first time?
Step one is observation: log every expense for 30 days without judging. Step two is assignment: give each dollar a job using 50/30/20 as the starting split. Step three is automation: move savings out on payday so it never sits temptingly in checking. Review monthly for the first quarter, then quarterly.
How much should I save per month?
On $5,000 take-home, 20 percent is $1,000 a month toward emergency fund, then investing and debt payoff. If 20 percent is impossible today, start at 5 or 10 percent; the habit matters more than the starting number. Every raise is a chance to bank half before lifestyle absorbs it.
Why does my budget never work?
The top killers: forgetting irregular expenses like car insurance or holidays (divide annual bills by 12 and save monthly), setting food budgets 30 percent below reality, and having zero buffer so one surprise breaks the plan. Add a 5 percent miscellaneous line and reconcile weekly for the first two months.