Budget
50/30/20 Budget Calculator
Type your monthly take-home pay and get the classic split — 50% needs, 30% wants, 20% savings — plus a look at where the rule quietly breaks.
- Needs50%$3,000
- Wants30%$1,800
- Savings20%$1,200
That's about $415 a week for wants.
50/30/20 is a starting point, not a law — high-rent cities break the 50 constantly, and the rule has no bucket for annual bills. That's the gap Flex mode's Non-Monthly bucket exists to close.
How it works
The 50/30/20 rule, popularized by Elizabeth Warren and Amelia Warren Tyagi in All Your Worth, divides after-tax income three ways: half to needs (rent, groceries, utilities, minimum debt payments, insurance), 30% to wants (restaurants, travel, the streaming pile), and 20% to savings and extra debt payments. Its whole appeal is that it fits on an index card.
This calculator does the arithmetic exactly, with one useful liberty: the savings stepper. Nudge savings above 20% and the extra comes out of wants — never needs — because in practice that's the only place it can come from without moving house. On $6,000 a month, the default split is $3,000 needs, $1,800 wants, $1,200 savings; that wants number works out to about $415 a week.
The rule has a blind spot, and the second bar under the results shows it. Car insurance, holiday gifts, annual subscriptions, the vet — none of these are monthly, so a three-bucket budget has nowhere to put them, and they land as "emergencies" that were never emergencies. ClariFi's Flex mode splits the same income four ways — 50% fixed, 25% flexible, 10% non-monthly, 15% savings — reserving a tenth of income for expenses that are completely predictable and never monthly.
The formula
needs = income × 0.50
savings = income × (savings % / 100)
wants = income − needs − savings ← remainder lands here, so the split
always sums to the penny
Example: $6,000 → $3,000 needs · $1,800 wants · $1,200 savings
Honest assumptions
- "Income" means after-tax take-home, including any side income you actually receive monthly.
- The 50% needs line is aspirational in high-rent cities — if needs run 60%, the rule says compress wants, not that you failed.
- Savings here includes extra (above-minimum) debt payments, per the original rule.
- This page does arithmetic. It doesn't know your life — it's a starting point, not a plan, and not advice.
Questions people ask
Is the 50/30/20 rule before or after taxes?
After. The rule works on take-home pay — what actually lands in your account. If your employer withholds retirement contributions or insurance premiums, decide once whether to count them (a 401(k) contribution is arguably part of your 20%) and be consistent.
What counts as a need versus a want?
A need survives a job loss: housing, groceries, utilities, transport to work, insurance, minimum debt payments. A want is everything you'd cut in a bad month. Restaurant groceries are needs; restaurants are wants. Honesty here is the whole game.
What if my needs are more than 50% of my income?
Common, especially in expensive cities. The rule's answer is to shrink wants first and treat 50 as a target to work back toward — not to punish yourself. If needs sit above 60% long-term, the levers are structural: housing, car, debt.
Where do annual bills fit in 50/30/20?
They don't, cleanly — that's the rule's known gap. Insurance premiums, gifts, and yearly renewals are needs or wants by nature but don't recur monthly. Setting aside ~10% of income for non-monthly expenses (as ClariFi's Flex mode does by default) keeps them from ambushing whichever bucket is nearest.
Related calculators
ClariFi makes tools, not advice. Nothing on this page is a recommendation to buy, sell, or sign anything.
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