Budget Calculator (50/30/20)

What this estimate assumes

• Uses the 50/30/20 rule: 50% of take-home pay toward needs, 30% toward wants, and 20% toward savings or extra debt payoff — a widely used starting guideline, not a rule that fits every situation or city.
• Leave "actual needs" and "actual wants" blank (or 0) to just see the recommended dollar breakdown for your income. Fill them in to compare what you're really spending against the target.
• "Needs" vs. "wants" is a judgment call only you can make — this tool doesn't categorize your spending for you.

How to use this calculator

1. Enter your monthly take-home pay (net income, after taxes and deductions) in "Monthly take-home pay ($)."
2. If you just want to see the recommended 50/30/20 breakdown for your income, leave "actual needs" and "actual wants" at 0 and click "Calculate my budget."
3. To compare your real spending against the targets, enter what you actually spend on needs (rent, groceries, utilities, minimum debt payments) and wants (dining out, subscriptions, hobbies).
4. Click "Calculate my budget" to see your recommended needs/wants/savings dollar amounts, and — if you entered actuals — how your real savings compares to the 20% target.
5. Re-run the numbers whenever your income or spending changes, such as after a raise or a move.

Worked example

Case 1 — just the recommended targets. Say your monthly take-home pay is $5,200 and you leave "actual needs" and "actual wants" at 0 because you just want to see the guideline amounts. The 50/30/20 rule applies directly to that income:

Needs: $5,200 × 50% = $2,600.

Wants: $5,200 × 30% = $1,560.

Savings: $5,200 × 20% = $1,040.

The calculator shows exactly these three figures — $2,600 for needs, $1,560 for wants, and $1,040 for savings — as your targets for the month.

Case 2 — comparing to actual spending. Now say you enter that same $5,200 income, but this time fill in actual needs of $2,900 and actual wants of $1,400. The recommended targets are unchanged ($2,600 / $1,560 / $1,040), but now the calculator can also tell you what you're really saving:

Actual savings = income − actual needs − actual wants = $5,200 − $2,900 − $1,400 = $900.

Compared to the 20% target of $1,040: $900 − $1,040 = −$140.

So in this case you'd be saving $900/month, which is $140 short of the 20% target — not a crisis, but worth noticing. Most of that gap traces back to needs running $300 over the 50% target ($2,900 vs. $2,600), while wants actually came in under target ($1,400 vs. $1,560).

Frequently asked questions

What counts as a "need" vs. a "want"?

Needs are costs you'd struggle to live without: rent or mortgage, groceries, utilities, insurance, minimum debt payments, and transportation to work. Wants are everything that makes life nicer but isn't essential: dining out, streaming subscriptions, hobbies, upgraded phone plans, vacations. The line isn't always clean — a $40/month phone plan is a need, a $120/month plan upgrade partly isn't — and this calculator leaves that judgment call to you.

What if my needs are naturally more than 50% of my income?

This is common in expensive cities, especially for rent. The 50/30/20 split is a guideline, not a law — if your needs genuinely run 60-65% of take-home pay because of where you live, the more realistic move is usually trimming the "wants" category and/or the savings rate slightly, rather than treating the 50% figure as mandatory.

Does "savings" include retirement contributions?

If your 401(k) or similar contributions are taken out before your paycheck hits your bank account, they're already excluded from the "take-home pay" you enter here, so count them separately as a win, not part of your 20%. If you're talking about take-home pay after those deductions, then any additional money you set aside — a savings account, taxable brokerage, extra debt payments — counts toward the 20% savings target.

Should I include debt payments as a need or as savings?

Minimum required payments on debt (credit cards, student loans, car loans) count as a need — they're not optional. Extra payments beyond the minimum, made specifically to pay debt down faster, function like savings and can reasonably go in that bucket since they build your net worth the same way a savings deposit does.

What if I have irregular income?

Use a conservative monthly average — many people use their lowest typical month, or average the last 3-6 months of take-home pay. Running the numbers on an optimistic high month can make your budget look healthier than it actually is in a leaner month.