The 50/30/20 rule is a starting point for building a budget without tracking every category from scratch: half of take-home pay toward needs, three-tenths toward wants, and a fifth toward savings or extra debt payoff.
How it works
Needs are the expenses that don’t go away — housing, utilities, groceries, minimum debt payments, insurance. Wants are discretionary — dining out, entertainment, subscriptions, upgrades. Savings covers building an emergency fund, investing, or paying down debt faster than the minimum.
A guideline, not a rule
In a high-cost city, needs can easily exceed 50% no matter how carefully you budget; someone with low fixed costs might comfortably save far more than 20%. Use it as a diagnostic — if wants are consuming 45% of take-home pay, that’s worth noticing — rather than a target to hit exactly every month.
How to use this calculator
- Enter your monthly take-home (after-tax) pay.
- Compare the three figures against what you’re actually spending in each category.
Frequently asked questions
Should I use gross or take-home pay?
Take-home pay — the 50/30/20 split is meant to cover what’s actually available to spend after tax, not before it.
What counts as a “need” versus a “want”?
Needs are what you’d still have to pay if income dropped sharply — housing, utilities, minimum debt payments, groceries. Everything genuinely optional, even things that feel essential day to day, falls under wants.
What if my needs are more than 50% of my income?
Common in high-cost areas — it usually means squeezing wants further, increasing income, or accepting a lower savings percentage for now rather than forcing an unrealistic split.
