Cover calculator · 9 min read
How Much Life Insurance Do I Actually Need?
The most common life insurance question — and the one most often answered with a useless rule of thumb. The real answer depends on your debts, dependants, income, education plans, and the size of your estate. Here are three methods to size your cover, with worked South African examples.
Key takeaways
- The '10x annual income' rule is a starting point, not a final answer.
- The DIME formula (Debt + Income + Mortgage + Education) gives a more accurate target.
- Factor in 20% Estate Duty on the value of your estate above R3.5 million.
- Most SA breadwinners need cover between R3 million and R8 million.
- Re-calculate every 3 years or after any major life event (child, bond, divorce, salary jump).
Method 1: the 10x income rule
The simplest method: take your gross annual income and multiply by 10. If you earn R45,000 per month (R540,000 a year), 10x gives you R5.4 million in cover. The logic: invested at 6% real return, that capital generates roughly your current income indefinitely.
It works as a quick sanity check but ignores debts you'd want settled, education you'd want funded, and the fact that your income will rise with inflation while a fixed lump sum doesn't.
Method 2: the DIME formula
DIME stands for Debt, Income, Mortgage, Education. Add them together to get your true cover need:
- Debt: total of credit cards, car finance, personal loans, store cards.
- Income: 10× your annual after-tax income (the family's income shortfall to fund).
- Mortgage: outstanding bond balance.
- Education: estimated cost of getting each child through to university completion.
Worked example: a R45,000/month earner
Thabo, 36, earns R45,000 gross (about R34,000 net) per month, has two children aged 4 and 7, owes R1.4m on his bond, R180,000 on his car, and R40,000 in credit. His DIME calculation:
- Debt: R220,000 (car + credit cards)
- Income: 10 × R408,000 (annual net) = R4,080,000
- Mortgage: R1,400,000
- Education: R750,000 × 2 children = R1,500,000
- Total cover need: R7.2 million
Don't forget Estate Duty
South Africa charges Estate Duty at 20% on the dutiable value of your estate above R3.5 million (and 25% above R30 million). A R7m life policy paid into your estate could trigger R700k of Estate Duty unless you nominate a beneficiary directly.
Method 3: human life value
Used by financial planners for high-net-worth clients. You calculate the present value of all future earnings until retirement, discounted at a real return rate (typically 4–6%). It usually produces the highest cover figure, but is the most accurate measure of true economic loss.
For most South African families, DIME is a better practical tool — human life value is overkill unless you're sizing key-person cover for a business.
How to keep premiums affordable
- Use term life (level premiums to age 65) rather than whole-of-life — typically 60% cheaper per rand of cover.
- Stack two policies: one large 20-year term policy and a smaller whole-of-life for final expenses.
- Buy cover in your 30s — every 5 years you delay typically increases premiums by 35–60%.
- Don't over-insure. R10m of cover for someone with no dependants and no debt is wasted premium.
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Get My Free QuotesFrequently asked questions
Is 10 times salary enough life insurance in South Africa?+
It's a reasonable starting point for income replacement, but you should add outstanding debt and future education costs separately. The DIME formula gives a more accurate figure for South African families.
How much life cover does a 35-year-old need in South Africa?+
For a 35-year-old earning R30,000–R50,000/month with a bond and 1–2 children, R3.5m–R7m is typical. Use the DIME formula to calculate your specific need.
Should I include my spouse's income in the calculation?+
Subtract your spouse's after-tax income from the household monthly need before applying the 10x multiplier. You only need to insure the income shortfall your death would create.