THE RANDMATH GUIDES

A little knowledge goes a long way.

Practical explanations for everyday money decisions. Read alongside the tools, at your own pace.

Saving & investing4 MIN READ

Build an emergency fund around your real life

Work out a useful cash buffer, choose a first milestone and separate emergencies from predictable bills.

Read the guide
Money & the news4 MIN READ

What inflation means for your own shopping basket

Turn an inflation headline into a practical household budget check, without assuming every price changes equally.

Read the guide
Money & the news4 MIN READ

When interest rates change, check these parts of your budget

Understand a rate announcement, check your own loan terms and compare repayments using the balance you still owe.

Read the guide
Money & the news4 MIN READ

Turn a fuel-price change into a monthly rand amount

Use your kilometres and fuel consumption to estimate the effect of a price change, then check the wider cost of travel.

Read the guide
Money basics4 MIN READ

Build a budget when your income changes each month

Plan around cash you can rely on, separate work costs and prepare for quieter months without assuming every invoice is paid on time.

Read the guide
Money basics4 MIN READ

Give annual bills a monthly place in your budget

Turn school costs, renewals and other predictable bills into manageable amounts, using the months actually left before each due date.

Read the guide
Income & tax5 MIN READ

How PAYE works in South Africa

Understand the journey from taxable income to the tax on your payslip.

Read the guide
Income & tax4 MIN READ

How to calculate your take-home salary

Separate your package, cash earnings, tax and deductions before comparing offers.

Read the guide
Loans & credit5 MIN READ

Understanding vehicle balloon payments

A smaller monthly instalment comes with a larger decision at the end.

Read the guide
Loans & credit5 MIN READ

How personal loan interest works

Make sense of a nominal rate, an instalment and the total amount you will repay.

Read the guide
Home & property5 MIN READ

How banks assess home loan affordability

Prepare a household budget and understand why a calculator cannot promise approval.

Read the guide
Income & tax4 MIN READ

Understanding VAT in South Africa

Know when to add VAT, when to divide it out, and what a calculation cannot tell you.

Read the guide
Saving & investing4 MIN READ

How compound interest grows savings

See what time and regular saving add to your plan, without assuming guaranteed returns.

Read the guide
Money basics4 MIN READ

How to create a realistic monthly budget

Give everyday spending, irregular bills and future plans a place in your budget.

Read the guide