50/30/20 Budget Calculator
Split your monthly take-home pay into needs, wants and savings with the 50/30/20 rule — and compare your actual spending against each target.
After taxes — what actually hits your account.
Why this rule survived
Budgeting systems mostly fail from complexity — forty categories, daily logging, abandonment by February. The 50/30/20 rule has outlived them because it asks exactly one hard question per purchase — need, want, or future — and because three buckets are enough to expose the only problem most budgets have, which is that the third bucket gets whatever is left, and nothing is left.
Start from real take-home pay — the take-home calculator gives you the honest input — and the targets fall out instantly. The comparison fields then show where your actual month diverges, which is the useful part.
The 20% is the point
Needs and wants spend themselves without help. The savings slice is the only bucket that requires intent, which is why the working version of this rule is blunt — pay the 20% first, on payday, automatically, and let the other two buckets fight over what remains. Budgets built the other direction fund savings at the rate leftovers occur.
Where the 20% goes has an order too — an emergency fund first, any employer match captured, high-interest card debt killed, then long-term investing.
When the ratios will not fit
A budget where needs eat 60% is common in expensive metros and is not a moral failing. The rule still earns its keep there — it names the size of the squeeze, shows which bucket is absorbing it, and turns “we never save” from a vague guilt into a specific, negotiable number.
How this is calculated
Needs = 50% of monthly after-tax income Wants = 30% Savings and extra debt payments = 20%
Frequently asked questions
- What counts as a need versus a want?
- Needs are what you must pay to keep life running — housing, groceries, utilities, insurance, transportation to work and minimum debt payments. Wants are everything elective, including the upgraded versions of needs. The restaurant version of dinner is a want; the grocery version is a need.
- Where do debt payments go?
- Minimum payments are needs — missing them has consequences. Everything beyond the minimum belongs in the 20% bucket alongside savings, because extra principal is functionally the same wealth-building move as a deposit.
- What if my needs are way over 50%?
- In high-rent metros they often are, and the rule bends rather than breaks. Hold the 20% savings line if you possibly can and let wants absorb the squeeze — the order of sacrifice matters more than the exact ratios. Persistent needs above 65% is a structural signal about housing or transport costs, not a discipline problem.
- Should I use gross or take-home income?
- Take-home. The rule was designed around what actually arrives in your account, since taxes are already gone before you make any choices. If retirement contributions come out of your paycheck first, count them toward the 20% — they are savings you already did.