Budget Planner

About this calculator

This planner splits your monthly take-home pay using the 50/30/20 budget rule: 50% to Needs, 30% to Wants, and 20% to Savings and debt repayment. Popularised by Senator Elizabeth Warren, it is a simple framework for turning one income figure into three spending targets. The three percentages are fully editable — push savings higher, or relax the rule for a tight month — and the calculator shows the monthly amount each share works out to, in whatever currency you choose. Nothing is converted between currencies: the figure you type is the figure that is split.

How to read your results

Enter your net monthly income — the money that actually lands in your account after tax and deductions. The three result cards show how much that income gives you for Needs (rent, groceries, utilities, minimum debt payments), Wants (dining out, subscriptions, hobbies) and Savings (an emergency fund, investments, extra debt payoff). The proportion bar shows the same split visually. If the three percentages do not add up to 100, a warning appears: the amounts are still calculated exactly as you set them, but you are either allocating more than you earn or leaving money unassigned.

How it's calculated

Let income be your monthly take-home pay and let the three shares be needsPct, wantsPct and savingsPct (each a percentage). Each allocation is income multiplied by its share over 100: needs = income x needsPct / 100, wants = income x wantsPct / 100, savings = income x savingsPct / 100. The percentages are applied exactly as entered — never auto-normalised — and their sum is reported so the tool can flag a budget that does not total 100%. All money amounts are rounded to two decimal places.

Worked example

Net monthly income 5,000 at the classic 50/30/20 split.

Needs get 2,500, Wants get 1,500, and Savings & debt get 1,000. The percentages total 100, so the budget is balanced — every unit of income has a job.

Frequently asked questions

What is the 50/30/20 budget rule?

It is a guideline that divides your after-tax income into three buckets: 50% for Needs (essentials you cannot skip), 30% for Wants (lifestyle spending you could cut), and 20% for Savings and debt repayment beyond minimum payments. It keeps budgeting simple by reducing dozens of line items to three targets.

Should I use gross or net income?

Use net (take-home) income — the amount that reaches your bank account after tax, pension and other deductions. The rule allocates money you can actually spend, so starting from gross pay would overstate every bucket.

Can I change the 50/30/20 percentages?

Yes. The three fields are editable. Aggressive savers often run 50/20/30 (more to savings), while a tight month might need 60/20/20 (more to needs). The calculator applies whatever percentages you enter and warns you if they do not total 100.

What counts as a Need versus a Want?

Needs are essentials you must pay to live and work: housing, utilities, groceries, transport, insurance and minimum loan payments. Wants are discretionary: restaurants, streaming services, travel, hobbies and upgrades. A useful test is whether skipping it for a month has real consequences.

Does this convert between currencies?

No. The currency selector only labels the result — your income is split in its own currency, so the engine never converts. Enter the amount in whatever currency you are paid in.

Sources

• www.investopedia.com/ask/answers/022916/what-502030-budget-rule.asp
• www.consumerfinance.gov/consumer-tools

Reviewed by the YouCalc Team · Last reviewedJune 26, 2026