Budget Planner Calculator
Plan your monthly budget using the 50/30/20 rule — needs, wants, and savings.
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The 50/30/20 rule is the most popular personal budgeting framework: allocate 50% of after-tax income to needs, 30% to wants, and 20% to savings and investments. It's flexible enough to adapt to almost any income level while giving clear guardrails for financial health. This calculator shows where your current spending stands against the 50/30/20 targets.
Example
Monthly income: $5,000 50% Needs ($2,500): rent $1,500, groceries $400, utilities $150, insurance $200, transport $250 30% Wants ($1,500): dining $200, entertainment $100, shopping $150, subscriptions $50 → $500 (only 10%) 20% Savings ($1,000): emergency fund $300, 401k $400, investments $200, spare $100 Result: surplus $500 — wants budget has $1,000 of headroom
Calculation
Needs target = Monthly income × 50% Wants target = Monthly income × 30% Savings target = Monthly income × 20% Surplus/Deficit = Monthly income − (Needs + Wants + Savings) Diff from target = Actual spending − Target for each category
Understanding the 50/30/20 Rule
Needs are expenses you can't avoid: housing, utilities, groceries, minimum debt payments, insurance, and transportation to work. Wants are discretionary: dining out, subscriptions, entertainment, travel, hobbies. Savings & investments: emergency fund, retirement accounts, stock investments, extra debt payments. The 50/30/20 rule is a guideline, not a strict rule. High-cost-of-living cities often push needs above 50%. In that case, adjust the want/saving split to compensate.
Frequently Asked Questions
What counts as a 'need'?
Fixed, unavoidable expenses: rent/mortgage, utilities, minimum debt payments, health insurance, groceries (basic), and required transportation. Upgrade costs (premium groceries, luxury car) are wants.
My needs exceed 50% — is that okay?
Yes, especially in high-cost cities. If needs are 60%, target 20% wants and 20% savings. Adjust proportionally rather than abandoning the framework.
Where do irregular expenses go?
Divide annual costs by 12 and include them monthly. Car registration, annual subscriptions, holiday spending — treat them as monthly budget items to avoid surprise deficits.
Does this handle taxes?
Use after-tax (net) income only. Pre-tax 401k contributions can go in savings since they reduce your taxable income but are still coming from your gross pay.