RandRoute · South African money tools
A budget that works in the month you have
Last reviewed: 6 October 2026 · South Africa-focused
Short answer
Start with costs that must be paid, then add flexible spending and goals. If the plan does not balance, adjust the categories that can move rather than pretending the gap is not there.
Separate fixed from flexible
Start with costs that must be paid, then add flexible spending and goals. If the plan does not balance, adjust the categories that can move rather than pretending the gap is not there.
- Track monthly and annual costs.
- Make recurring subscriptions visible.
- Give savings a line before the month begins.
Use 50/30/20 as a prompt
The 50/30/20 framework can be a helpful first draft: roughly 50% needs, 30% wants, and 20% savings or debt reduction. It is a starting point that should flex with housing costs, family responsibilities, and income changes.
Review the plan with your real numbers
A calculator is most useful when you replace estimates with your own recent spending. Review the result monthly, celebrate what is working, and make one small adjustment at a time.
Worked South African example
For example, start with R28,000 after-tax income, add your essential costs and recurring payments, and use the remaining amount to plan savings or debt reduction.
Put the idea into a number
- Monthly Budget Calculator — Build a monthly budget and see what remains after essentials, lifestyle, debt, and savings.
- Expense Calculator — Add up recurring expenses to see your monthly and annual cost of living.
- 50/30/20 Budget Calculator — Use the 50/30/20 framework to turn after-tax income into needs, wants, and savings targets.
- Affordability Calculator — Estimate an indicative property price from income, obligations, deposit, rate, and term.
Next step: Start with the primary calculator above, then compare the next two tools to turn the guide into a plan.