50/30/20 Budget Calculator

A Budget Simple Enough to Actually Keep

Most budgets fail because they are too detailed to maintain. The 50/30/20 rule survives because it asks you to track only three numbers. Half of your take-home pay covers needs — the non-negotiables like rent or bond, groceries, transport, utilities, insurance and the minimum payments on your debts. Thirty percent covers wants, the lifestyle spending that makes life enjoyable but that you could cut if you had to: eating out, subscriptions, entertainment, upgrades. The final twenty percent is the part that builds your future: savings, investments and any extra debt repayment above the minimums.

Use Take-Home Pay, Not Your Gross Salary

The single most common budgeting mistake is working off your gross salary. Tax, UIF and other deductions can take a meaningful slice before your pay even arrives, so budgeting off the gross figure plans for money you never actually receive. Always start with the net amount that lands in your account — that is the only figure you can genuinely spend.

When the Rule Doesn't Fit

The 50/30/20 split is a guideline, not a law of nature, and in a high cost-of-living environment it often needs bending. On lower incomes, needs alone can exceed 50% before any wants are considered. If that is your reality, do not abandon the framework — adapt it. Protect the savings portion even if it has to start smaller than 20%, treat extra debt repayment as part of that bucket, and focus over time on reducing your largest fixed costs. The goal is simply to make sure some of every payday is working for your future, not just your present. If debt is the thing crowding out everything else, our debt snowball calculator shows how to clear it fastest, and your debt-to-income ratio tells you how much room you are working with.