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Monthly Budget Calculator — 50/30/20 Rule

Allocate your monthly income across needs, wants, and savings. See how you track against the 50/30/20 rule.

Monthly After-Tax Income

$
$1,000$20,000

Needs (50% target)

$
$0$5,000
$
$0$2,000
$
$0$2,000
$
$0$1,000

Wants (30% target)

$
$0$1,500
$
$0$1,000
$
$0$500

Savings & Debt (20% target)

$
$0$5,000
$
$0$2,000

Budget Summary

Monthly Income

$5,000

Total Spending

$3,780

Leftover

$1,220

Annual Income

$60,000

Needs

$2,500 spent target $2,500

Wants

$480 spent target $1,500

Savings & Debt

$800 spent target $1,000

What This Calculator Does

The Budget Calculator helps you allocate your monthly take-home pay across three buckets — needs, wants, and savings/debt repayment — and compares your actual spending against the popular 50/30/20 rule. Enter your income and your spending in each category, and the calculator instantly shows whether you're on track or overspending in each bucket.

It's a quick health check rather than a full budgeting app: it highlights where your spending is out of balance so you can decide what to adjust. If your needs exceed 50% of income, for example, that often signals housing or transportation costs that are stretching your budget thin.

Formula

Needs ≤ 0.50 × Income, Wants ≤ 0.30 × Income, Savings/Debt ≥ 0.20 × Income

The 50/30/20 rule splits after-tax income into three targets. 'Needs' covers essential, hard-to-avoid expenses. 'Wants' covers lifestyle spending you could reduce if needed. 'Savings/Debt' covers building wealth and paying down balances beyond minimums — and is treated as a floor (at least 20%), not a ceiling.

  • IncomeMonthly after-tax (take-home) income
  • NeedsHousing, groceries, transportation, utilities, insurance, minimum debt payments
  • WantsDining out, entertainment, subscriptions, hobbies
  • Savings/DebtEmergency fund, retirement contributions, investments, extra debt payments

Examples

Example 1: A $5,000/month take-home income

Targets: Needs ≤ $2,500, Wants ≤ $1,500, Savings/Debt ≥ $1,000. Actual spending: $2,500 needs, $480 wants, $800 savings/debt.

Needs are right at target, wants are well under (good), but savings/debt is $200 below the 20% target — consider redirecting some of the wants surplus.

Example 2: Housing-heavy budget on a $4,500 income

Targets: Needs ≤ $2,250, Wants ≤ $1,350, Savings ≥ $900. Actual: $2,800 needs (rent-heavy), $600 wants, $400 savings.

Needs exceed target by $550 (24.4% over) and savings falls $500 short of the 20% goal — a sign housing costs are crowding out savings.

Example 3: A high-saver on a $7,000 income

Targets: Needs ≤ $3,500, Wants ≤ $2,100, Savings ≥ $1,400. Actual: $3,000 needs, $1,400 wants, $2,600 savings/debt.

All three categories beat their targets — total spending of $7,000 leaves $0 leftover, with 37% of income going to savings and debt paydown, well above the 20% minimum.

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Methodology

Needs target = 50% of after-tax income. Wants target = 30%. Savings/debt target = 20%. Totals are compared against your inputs to show over/under in each bucket.

Frequently Asked Questions

What is the 50/30/20 rule?+

Allocate 50% of after-tax income to needs (housing, food, utilities), 30% to wants (dining, entertainment, hobbies), and 20% to savings and debt repayment. It is a flexible starting point, not a strict rule.

What counts as a need vs a want?+

Needs are essential expenses you cannot avoid: rent/mortgage, groceries, utilities, insurance, minimum debt payments, and transportation to work. Wants are lifestyle choices you could reduce: subscriptions, dining out, gym memberships, and entertainment.

How much should I save each month?+

The 20% savings target includes emergency fund contributions, retirement accounts (401k, IRA), and extra debt payments. Most financial planners recommend building a 3–6 month emergency fund before investing aggressively.

Disclaimer: Calculations are for informational purposes only and do not constitute professional financial advice. Please consult with a certified professional before making financial decisions.