50/30/20 Budget Calculator

How the 50/30/20 Rule Works

The 50/30/20 rule is the simplest budgeting framework that actually sticks. You divide your monthly take-home pay into three slices: 50% to needs — the things you genuinely can't skip, like rent or bond, groceries, transport, utilities and the minimum payments on any debt; 30% to wants — eating out, entertainment, subscriptions, the nice-to-haves; and 20% to savings and extra debt repayment — building your emergency fund, investing, or paying down debt faster than the minimum. It works because it's easy to remember and doesn't require tracking every transaction.

Always Use Take-Home Pay

The single most important rule: budget off your net pay — what actually arrives in your account after tax, UIF and any deductions — not your gross salary. Budgeting off gross is the most common reason a budget falls apart, because it counts money you never actually receive. The calculator above assumes you've entered your take-home figure.

Adapting It to a South African Salary

The 50/30/20 split is a target, not a law. On many South African salaries, needs alone — especially rent and transport — eat well past 50%, which squeezes the other two slices. That's normal and not a failure. The real value is in the structure: even if your split is 70/20/10 today, naming a savings slice and protecting it is what builds wealth over time. Use the percentage fields above to model your actual situation, then look for one "need" or "want" you can trim to nudge the savings slice up.

Where the Savings Slice Should Go

If you have high-interest debt, the savings-and-debt slice is best aimed there first — clearing a 22% credit card is a guaranteed 22% return. Once expensive debt is gone, redirect that slice into an emergency fund (aim for three months' expenses), then long-term saving. See how fast extra payments clear debt with the debt repayment calculator, or how a savings slice grows with the compound interest calculator.

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