Finance

50/30/20 Budget Calculator

Split your monthly take-home into needs, wants and savings using Senator Warren’s rule. Adjust the percentages to fit your life.

Monthly take-home pay

After-tax pay that hits your bank account.

Needs (%)

Rent, groceries, utilities, insurance, transportation.

Wants (%)

Dining, subscriptions, hobbies, vacations.

Savings & debt (%)

Emergency fund, retirement, extra debt payment.

Your monthly take-home

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Enter your monthly net pay.

What is the 50/30/20 rule?

Popularised by Senator Elizabeth Warren in All Your Worth, the 50/30/20 rule says that of your monthly take-home pay you should spend at most 50% on needs, no more than 30% on wants, and put at least 20% toward savings and debt repayment. “Needs” are the bills you cannot avoid: housing, utilities, groceries, insurance, transportation. “Wants” are everything you choose to buy: streaming, dining, hobbies, vacations. “Savings” covers the emergency fund, retirement contributions and any debt payment beyond the minimum. The rule’s power is its simplicity: instead of tracking 50 line items, you only have to keep three buckets in proportion. If your needs are over 50%, you have a structural cost problem (rent or car); if your wants are over 30%, you have a discretionary problem you can fix in a month.

How to use the calculator

Enter your monthly take-home pay — net of taxes, 401(k), insurance.
The default 50/30/20 split is shown but you can adjust each percentage; the others auto-rebalance.
Use the breakdown to set spending caps in your banking app or budgeting tool.
Track for one month: does your real spending fit? If wants exceed 30%, identify two recurring subscriptions to cancel.
Recalculate each time your salary changes — raises should mostly land in the savings bucket, not lifestyle inflation.

How the math works

Each bucket is take-home multiplied by the chosen percentage. Weekly figures divide by 4.33 (the average number of weeks in a month).

Needs = Take-Home × 0.50

Wants = Take-Home × 0.30

Savings & Debt = Take-Home × 0.20

What goes in each bucket

Common categories — customise to your situation.

Bucket	Examples
Needs (50%)	Rent or mortgage, utilities, groceries, transportation, insurance, minimum debt payments
Wants (30%)	Dining out, streaming, hobbies, vacations, premium upgrades
Savings (20%)	Emergency fund, retirement (Roth IRA, 401k), extra debt payoff, brokerage account

Frequently asked questions

Is 50% really enough for needs?

In high-cost cities (NYC, SF, London) housing alone often eats 40–50%, leaving no room. The rule still works as a benchmark — if you can’t hit it, you have a structural housing problem.

Should I count 401(k) as savings?

Use take-home after 401(k) and treat the 401(k) match as bonus savings, or use gross income and include 401(k) inside the 20%. Both approaches work — just be consistent.

What about high-debt situations?

If you have credit card debt above 15% APR, push the savings bucket to 30–40% (mostly debt) until eliminated. The 20% baseline assumes no high-interest debt.

Is rent a need or a want?

Reasonable rent is a need. Choosing a luxury apartment over a basic one means part of your rent is a want — mentally split it.

Should I save 20% before or after retirement match?

Always capture the full match first — it’s free money. The 20% is the floor on top of any matched contributions.

What if I make less than $30K?

Hitting 20% savings on a tight budget is hard but not impossible. Start with 5% automatic contributions and ratchet up by 1% with every raise.

50/30/20 Budget Calculator