50/30/20 Budget Calculator
Written by Thierno Sadou Diallo, formula verified per our methodology • Last checked on 9/5/2026
The 50/30/20 rule splits net income into three parts: 50% for essential needs, 30% for wants, and 20% for savings. For a net income of €2,500, that's €1,250 for needs, €750 for wants, and €500 for savings.
Explanation
The 50/30/20 budgeting rule was popularized in 2005 by U.S. Senator Elizabeth Warren and her daughter Amelia Warren Tyagi, in their book "All Your Worth: The Ultimate Lifetime Money Plan". It proposes a simple split of monthly net income into three categories: 50% for essential needs (rent or mortgage, food, insurance, transportation, energy, healthcare — the hard-to-reduce expenses), 30% for wants (entertainment, dining out, shopping, subscriptions, travel — comfort or lifestyle spending), and 20% for savings (savings accounts, investments, or early debt repayment). The appeal of this rule is its simplicity: it doesn't require a detailed spreadsheet, just a known monthly net income. These percentages remain guidelines, not fixed rules: in an area with a very high cost of housing, the needs share often exceeds 50% in practice, which reduces the room left for wants or savings — the rule serves as a benchmark to adjust to your actual situation, not a rigid constraint. To project the growth of this savings amount over time, see our future value calculator.
Example: net income of €2,500
Inputs
Monthly net income: €2,500.
Calculation
Needs = 2,500 × 50% = €1,250. Wants = 2,500 × 30% = €750. Savings = 2,500 × 20% = €500.
Result
With this income, the rule suggests €1,250 for needs, €750 for wants, and €500 for savings.
Frequently asked questions
Are these percentages mandatory?
No, they're guidelines, not a rigid rule. Depending on your situation (cost of housing in your area, family expenses, specific savings goals), a different split may be more realistic — for example 60/20/20 in a high-rent area. What matters most is keeping a clear view of the three main spending categories.
How do I know if an expense is a "need" or a "want"?
The general rule: a need remains necessary even if you sharply cut your lifestyle (housing, food, healthcare, commuting to work), while a want improves quality of life without being strictly essential (dining out, entertainment subscriptions, travel). The line isn't always clear-cut: an internet subscription can be classified as a need or a want depending on each person's work situation.
What if my needs exceed 50% of my income?
This is a common situation, especially in high-rent areas: in that case, the theoretical split isn't achievable as-is. Reducing the wants share (theoretically 30%) is often the most realistic short-term lever, while still trying to maintain some savings, even reduced, rather than eliminating it entirely.