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50/30/20 Budget Calculator
Multiplies after-tax monthly income by 0.5 / 0.3 / 0.2 for needs, wants, and savings targets, with optional variance vs actual spending.
Limitation: The 50/30/20 split is an educational rule of thumb, not a legal requirement or personalized financial advice.
How to Apply the 50/30/20 Rule
Start with take-home pay so percentages map to cash you can spend or save.
Choose a display currency.
Classify carefully
Needs are essentials to live and work; wants are flexible lifestyle choices; savings includes emergency funds, investing, and extra debt payoff.
What the 50/30/20 Result Means
Primary output is the needs target. Details list wants and savings targets. Variances are target minus actual when you enter actuals (positive variance means under target).
50/30/20 Examples
Targets only on $4,000 take-home
Entered income and optional actuals
Needs target
50% / 30% / 20% of 4,000.
Needs overrun
Entered income and optional actuals
Needs target
Actual needs exceed the 50% target by 200.
If needs exceed 50%
Trim wants first, then revisit housing or transport—this calculator only reports the gap.
Frequently Asked Questions
Still have questions about this calculation?
Try the Calculator50/30/20 Formulas
No location cost-of-living table or credit model is applied.
Formula
Needs target
0.5 × after-tax monthly income
Wants target
0.3 × after-tax monthly income
Savings target
income − needs target − wants target
Scientific Background
Popularized as a simple household guideline. Assumptions: stable monthly take-home pay and user classification of needs vs wants. Limitations: local housing ratios, irregular income, and high-interest debt may require a different split.
Sources & review
50/30/20 Budget Calculator documents the references behind its formulas and assumptions. Always treat results as educational estimates, not personalized professional advice.
Last reviewed
July 22, 2026
Consumer financial tools
Consumer Financial Protection Bureau (CFPB)
https://www.consumerfinance.gov/consumer-tools/budgeting/Free Calculator Hub methodology
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