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Plan My Budget

What Is the 50/30/20 Rule?

The 50/30/20 rule is a simple, proven budgeting framework popularised by Senator Elizabeth Warren in her book All Your Worth. It divides your after-tax income into three categories:

CategoryPercentageWhat It Covers
Needs50%Housing, utilities, groceries, transport, insurance, minimum debt payments
Wants30%Dining out, entertainment, streaming, clothing, hobbies
Savings & Debt20%Emergency fund, retirement, investing, extra debt repayment

It’s simple enough to stick to, yet flexible enough to work for most income levels.

How to Use the Budget Calculator

  1. Enter your monthly take-home income (after tax)
  2. Fill in your actual expenses in each category — as accurately as possible
  3. Click Analyse — see your actual percentages vs the 50/30/20 targets
  4. Identify problem areas — where are you over- or under-allocating?

Understanding Your Results

Progress bars

Each category shows your actual percentage alongside the target. A green checkmark means you’re within the guideline; a red arrow means you’re over budget in that area.

Unallocated amount

This shows what’s left over (positive) or your shortfall (negative). A negative number means you’re spending more than you earn — a critical signal to act immediately.

Is the 50/30/20 Rule Right for You?

The rule works well as a starting point, but life circumstances vary:

High cost-of-living areas

In cities like San Francisco, London, or Sydney, housing alone may consume 40–50% of income. If needs genuinely exceed 50%, focus on minimising other costs or increasing income.

Paying off significant debt

Consider a 50/20/30 split (swap savings and wants) to accelerate debt repayment.

Low income

When income is tight, needs may consume most of it. Even saving 1–5% builds the habit — the percentage matters less than starting.

High income

Consider bumping savings well above 20%. The FIRE (Financial Independence, Retire Early) community typically saves 40–70% of income.

Budgeting Tips That Actually Work

Track before you judge

Most people are surprised by where their money actually goes. Track for 30 days before making cuts — the data often reveals painless savings.

Automate savings first

Transfer savings to a separate account on payday. “Pay yourself first” — what you never see, you never spend.

Use the envelope or zero-based method

Zero-based budgeting assigns every dollar a purpose, leaving $0 unallocated. It takes more effort but provides much tighter control.

The latte effect (and its limits)

Small daily purchases ($5 coffee × 30 days = $150/month) matter, but they’re rarely the biggest budget problems. Focus on the three big ticket items: housing, transport, and food — they typically represent 70%+ of spending.

Build an emergency fund first

Before aggressively investing, build 3–6 months of expenses in a liquid savings account. An emergency without savings forces you into debt.

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