Cornerstone — Edition 10
The Income Math Before the Decision
Whether to have a child is not a financial question, and this edition doesn’t pretend otherwise. But underneath that decision sits a financial floor that is entirely knowable — and most couples never actually sit down and calculate it before deciding. They wait for “the right time,” which rarely arrives in full, and the numbers stay unexamined.
This edition is that calculation. Not whether to have children — that’s yours to answer. But what changes in your monthly numbers when you do, so the emotional decision isn’t also silently making a financial one you haven’t looked at.
The first-year costs that catch new parents off guard are rarely the big-ticket items — it’s the ongoing monthly ones that quietly reset the household budget. Full-day creche or a nanny typically runs somewhere between R3,000 and R7,000 per month in most metros, depending on the facility and the child’s age — before any before- or after-school care years later.
Adding a child as a dependant on your medical aid brings its own premium increase — most schemes charge a flat per-child rate, and many cap it after the second or third child, so it’s worth checking your specific scheme’s rate rather than assuming. Nappies, formula, clothing that’s outgrown every few months, and basic equipment add a further ongoing cost in the first year or two.
Very roughly, most families see an all-in additional monthly cost of R4,000 to R9,000 in the first few years — before school fees enter the picture later on. Run your own number using your actual medical aid scheme and realistic local childcare rates; the range above is a starting point for the conversation, not a figure to budget against directly.
It’s easy to assume the months around birth will be financially uneventful because leave is “covered.” In most cases it isn’t, or not fully. UIF maternity benefits replace only a portion of salary, on a sliding scale, and only for a limited period — and many employers pay nothing beyond what UIF provides unless their own policy says otherwise. Parental leave for a non-birth parent is typically far shorter again.
Before you can know whether you’re financially ready, you need your actual numbers here — not an assumption. Check your specific employer’s policy and the current UIF benefit rates directly, and model a few months of genuinely reduced household income into your planning rather than hoping it works out.
A dependant changes the maths on two things that are easy to postpone: debt and cover.
Debt. Carrying high-interest short-term debt — credit cards, store cards, personal loans — alongside a new monthly cost increase is a difficult combination. Clearing this kind of debt before adding the cost of a child, rather than alongside it, gives the new expense somewhere to land.
Cover. Life cover and income or disability protection sized for two adults are very likely undersized for a family with a dependant. Your income just became someone else’s lifeline — and that’s worth reviewing before the child arrives, not sometime after.
None of this needs to be resolved perfectly before deciding. But going in with eyes open on debt and cover is very different from discovering the gap after the fact.
A short, practical list — not to give you a pass or fail, but to make sure the financial floor has actually been looked at before the decision is made.
Tick off what you’ve already covered. For anything still unchecked, that’s the useful part — it tells you exactly where to focus before, not after.
Once a child arrives, one habit matters more than almost any other: opening a Tax-Free Savings Account in the child’s own name and starting early, even with a small amount. The timing matters more than the size of the contribution.
A parent contributing R1,500 a month from birth to age 18, at a 10% annual return, ends up with roughly four times the outcome of a parent who starts the same monthly contribution at age 10 — despite contributing only about twice as much in total.
Start smaller if a larger amount isn’t realistic in the early years. R500 a month is categorically better than zero. The amount matters less than the fact of starting early.
The one question to sit with
If you added your realistic monthly child-cost estimate to today’s budget, would you still end the month with a surplus — or would you need to dip into savings within the first year? That answer, more than anything else in this edition, is the actual starting point.
Worth reading
The Compound Effect
Not written about family finances specifically, but the book that most clearly demonstrates the mathematics and psychology of consistent small decisions over long periods. The core lesson — that small, deliberate choices made early compound into outcomes disproportionate to their size — applies as much to the financial habits you build around a child as to anything else.
Every edition of Cornerstone has been built around a single premise: that financial clarity is not the exclusive domain of people with large portfolios and financial advisers on speed dial. It belongs to anyone willing to ask the right questions at the right time.
The life stages covered in this series — the 20s, 30s, 40s, 50s, new professionals, families, retirees, those approaching retirement, those with lump sums, those weighing whether they’re ready for children — represent the full arc of a financial life. No two arcs are identical. But the principles that underpin each of them are consistent: start earlier than you think you need to, protect the income that makes everything else possible, eliminate high-cost debt before building investment wealth, understand the products you hold, and make decisions deliberately rather than reactively.
The questions at the end of each edition are not rhetorical. If any of them produced an uncomfortable answer, that discomfort is the most useful financial signal you have. It points to where the work is.