Monthly Budget Calculator — 50/30/20 & Custom
Build a monthly budget from your take-home pay: 50/30/20 needs-wants-savings split or custom categories, with over-budget flags per category. Free, private.
A budget is just a plan for money you have already decided to spend — the 50/30/20 rule (needs / wants / savings) is the fastest starting frame that actually holds up. Enter your take-home pay and current spending by category, and see where you stand against the targets.
The over-budget flags are the point: most households discover their "wants" include things they thought were needs, and that the savings line — not the coffee — is where the plan lives or dies. Everything is computed in your browser; nothing is stored.
100% in-browser · no upload · no signup · nothing you paste or drop here leaves your device
Family Budget Calculator
Track monthly income and expenses — see your surplus, savings rate, and subscription waste.
Based on average US household spending patterns from the BLS Consumer Expenditure Survey. Actual costs vary by location and family size. This is for planning only.
The 50/30/20 allocation — illustrated
The 50/30/20 rule, popularized by Senator Elizabeth Warren, splits after-tax income into three buckets: 50% for needs, 30% for wants, and 20% for savings and debt payoff. "Needs" are the non-negotiable bills — housing, utilities, food, transport, insurance, and minimum debt payments; "wants" are the flexible categories like dining, streaming, and entertainment that can shrink in a pinch. The savings bucket should be funded first, not last: paying yourself before spending is what turns a balanced budget into a growing one. This calculator sums your actual categories and shows your real split, so a family spending 64% on needs can see exactly which line item is pushing the budget out of shape.
The rule's target split (left) applied to a $6,500/mo income. The calculator compares your actual category totals against these targets.
The Okafor family earns $6,500/mo take-home. Using this calculator's default categories, they allocate $4,170 to needs, $285 to wants, and $500 to a savings line item, leaving a $1,545 surplus.
- Income:$6,500/mo take-home after tax
- Needs:$4,170 — housing $1,800, utilities, food, transport, insurance, phone, health, debt
- Wants:$285 — streaming $85 plus entertainment $200
- Surplus:$1,545 — a 23.8% savings rate, above the 20% guideline
About this monthly budget calculator
This page covers budget planner with take home pay, 50 30 20 rule calculator, household budget template by paycheck, how to budget monthly income — all the same underlying task as monthly budget calculator. The tool above is FreeToolHub's family budget calculator embedded in full: every feature works right here, and nothing you process is uploaded to any server.
Frequently asked questions
What is the 50/30/20 budget rule?
Of take-home pay: 50% to needs (housing, food, transport, insurance, minimum debt payments), 30% to wants, 20% to savings and extra debt payoff. It is a starting split, not a law — high-rent cities break the 50% line immediately, and the calculator lets you move category lines while keeping the savings target honest.
Should I budget on gross or take-home pay?
Take-home — the amount that actually lands in the account. Budgeting on gross double-counts taxes and makes every percentage look better than it is. If you want to include 401(k) and HSA contributions, add them to the savings category rather than starting from gross.