How the 50/30/20 budget calculator works
The 50/30/20 rule, popularised by Senator Elizabeth Warren and Amelia Warren Tyagi in All Your Worth, divides after-tax income into three buckets.
Wants = Take-home × 30%
Savings & debt = Take-home × 20%
Needs are bills you must pay: rent or mortgage, utilities, groceries, insurance, transport to work and minimum debt payments. Wants are everything optional: dining out, streaming, travel and hobbies. Savings covers your emergency fund, retirement contributions you make from take-home pay and any payments above the minimum on debts. Use take-home pay, after taxes and payroll deductions; if your employer deducts 401(k) contributions, those already count as savings.
Worked example
With $4,500 a month take-home, the rule gives $2,250 for needs, $1,350 for wants and $900 for savings, which is $10,800 a year. If rent alone is $1,800 in a high-cost city, a 60/20/20 split ($2,700 / $900 / $900) keeps savings intact by trimming wants instead.
Frequently asked questions
Is the 50/30/20 rule based on gross or net income?
Net, meaning take-home pay after taxes and payroll deductions.
Are minimum debt payments needs or savings?
Minimum payments are needs. Anything you pay above the minimum counts toward the 20% savings bucket.
What if I cannot fit needs into 50%?
That is common in high-cost areas. Adjust the percentages here, such as 60/20/20, and look for the largest fixed costs to reduce over time.
Where should savings go first?
A common order is a starter emergency fund, the full employer 401(k) match, high-interest debt, then a fuller emergency fund and retirement.
Updated October 2026. Results are estimates for education, not financial or medical advice. All math runs in your browser; nothing you type is sent anywhere.