This calculator applies the popular 50/30/20 budgeting rule to your monthly after-tax income, splitting it into needs, wants, and savings or debt repayment. For a full walkthrough of how to apply this in practice, see our blog post on the 50/30/20 budget rule, explained.
The formula
For a $3,000 monthly after-tax income: needs budget is $1,500, wants budget is $900, and savings/debt budget is $600.
Worked examples
| Monthly income | Needs (50%) | Wants (30%) | Savings (20%) |
|---|---|---|---|
| $2,200 | $1,100 | $660 | $440 |
| $4,500 | $2,250 | $1,350 | $900 |
| $6,000 | $3,000 | $1,800 | $1,200 |
What counts as a "need" vs. a "want"
Needs are costs you can't reasonably avoid — housing, utilities, groceries, minimum debt payments, and basic transportation. Wants are everything that improves quality of life without being essential — dining out, subscriptions, and hobbies.
Common mistakes
- Using gross income instead of after-tax income. This inflates every bucket beyond what you can actually spend.
- Treating the ratios as rigid. In high cost-of-living areas, needs often exceed 50% — adjust the ratios to your real circumstances rather than forcing the exact split.
Tips
- Automate the savings amount on payday so it isn't left to willpower at the end of the month.
- Revisit the split whenever your income or major fixed costs change.
Frequently asked questions
What income should I enter?
Use your after-tax (net) monthly income — what actually reaches your bank account — not your gross salary.
Is the 50/30/20 split mandatory?
No, it's a widely used starting guideline. In higher cost-of-living areas or with specific financial goals, many people adjust the ratios to fit their real circumstances.
What counts toward the 20% savings bucket?
Emergency fund contributions, retirement savings, and any debt payments beyond the required minimum.
References
- Consumer Financial Protection Bureau — General guidance on household budgeting frameworks