Budget Calculator
Allocate your monthly income using the 50/30/20 budgeting rule — split between needs, wants, and savings.
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How to use this calculator
The 50/30/20 rule divides after-tax income into three categories: 50% for essential needs, 30% for lifestyle wants, and 20% for savings and debt repayment.
- 1
Enter your monthly take-home income after taxes.
- 2
Adjust the percentage sliders for needs, wants, and savings (default 50/30/20).
- 3
Review the dollar amounts for each category.
- 4
Make sure the three percentages add up to 100% for a balanced budget.
Frequently asked questions
What counts as a "need" vs a "want"?
Needs are essential: rent/mortgage, utilities, groceries, minimum debt payments, basic transport, and insurance. Wants are lifestyle upgrades: dining out, streaming services, gym memberships, hobbies, and shopping beyond essentials. The line can blur — decide based on whether you could survive without it.
What if my needs exceed 50% of income?
This is common in high cost-of-living areas. Adjust the rule to fit reality — many financial advisors use 60/20/20 or even 70/15/15 for high-cost cities. The key principle is that savings stays positive, even if small.
How do I handle irregular income (freelance, commissions)?
Base your budget on your lowest expected monthly income. In high-earning months, funnel the extra into savings or debt repayment first. This smooths cash flow and prevents lifestyle creep.
Should debt repayment come from savings or wants?
Minimum debt payments are a "need." Extra debt payments above the minimum are counted in the savings/debt bucket (20%). Paying off high-interest debt early is functionally equivalent to earning a guaranteed return equal to the interest rate.
The 50/30/20 budget rule explained
History of the 50/30/20 rule
The 50/30/20 rule was popularized by Senator Elizabeth Warren and her daughter Amelia Warren Tyagi in the 2005 book "All Your Worth." It is intentionally simple — three buckets instead of dozens of expense categories — making it easy to follow without tracking every dollar.
Setting up a zero-based budget
A zero-based budget allocates every dollar of income to a category until the balance reaches zero. It is more precise than 50/30/20 but requires more effort. Good budgeting apps (YNAB, Copilot, Monarch Money) can automate transaction categorization.
Automate savings to make the budget stick
The most reliable way to save is to automate it. Set up an automatic transfer to savings or investments on payday, before you can spend the money. Treating savings as a non-negotiable expense — paying yourself first — builds wealth without relying on willpower.
Budget: how it works
This free tool helps you plan and compare financial scenarios in seconds. Enter your figures, adjust the assumptions, and instantly see how different inputs affect the outcome — ideal for budgeting, benchmarking, and data-driven decision-making.
Who uses this tool?
Financial planners, accountants, students, and individuals use it to model scenarios before committing to major financial decisions. It is equally useful for quick sanity checks and detailed what-if analyses.
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Results are estimates for informational purposes only and do not constitute professional financial, medical, legal, or technical advice. Read full disclaimer →