What People Get Wrong on Their Tax Return — And Why It's Not About the Refund

Most people treat their tax return like a race. Fill it in, hit submit, see how fast the refund lands. That's the wrong way to think about it.

Your return isn't a refund application. It's a declaration — a statement of everything that happened in your financial life that year, made under your own name, to a regulator that checks it against other records. And the most common mistake isn't people trying to pay less tax. It's people leaving things off the return because they've assumed "not taxable" means "not SARS's business." It doesn't.

You inherited money. SARS didn't tax it — but you still have to tell them.

The reasoning goes: "I inherited money, SARS already took estate duty, there's nothing left for me to do."

That's wrong. Inheritances aren't taxed as income in your hands — that part is right. But you still need to declare what you received. It goes down as non-taxable income on your return. Leaving it off doesn't save you anything, because there was never any tax due on it. All it does is create a gap between what SARS can see — a large deposit, a transfer, a change in what you own — and what your return says happened.

You won money. It's tax-free — but the same rule applies.

Lotto, a casino win, a bet that came in — if gambling isn't your job or your main income, the winnings aren't taxable. Also right.

But "not taxable" and "not disclosed" aren't the same thing. Winnings go into the non-taxable section of your return, same as an inheritance. People skip this for the same reason: they've mixed up "SARS doesn't want a cut" with "SARS doesn't want to know."

You sold your home for a profit. The exclusion doesn't mean silence.

You sell your primary residence, there's a gain, and you know there's an exclusion — the first R3 million of the gain, for sales agreed on or after 1 March 2026 (R2 million before that; it's the date the deal became final that decides which one applies, not the date the house transfers). So you figure: gain's under the threshold, no tax, nothing to report.

That's the mistake. The sale still has to go on your return under capital gains. The exclusion is applied inside that calculation — it isn't a reason to skip the calculation. And if the property's owned by a trust or a company, there's no exclusion at all.

The one real exception: money between spouses

There's one place where "not taxable" genuinely does mean "don't worry about it" — money or property moving between spouses. No cap, no donations tax, and you don't need to declare it either. It's the one case where what people assume about everything else on this list actually holds.

It stops at the marriage, though. Parent to child, sibling to sibling, anyone else — that's where the real risk sits.

One thing to check if either of you lives outside South Africa: this unlimited exemption currently requires the receiving spouse to be a South African tax resident. A 2026 draft tax bill, not law yet, would remove it where they aren't. If that could apply to you, confirm the current position before relying on it.

Where this actually catches people out

This is where it stops being theoretical. When SARS's records don't match your history, it doesn't wait for you to explain — it goes and checks.

Buy a property today and you'll increasingly be asked where the money came from. Say "inheritance," and SARS checks that against what you declared when you got it. If the two don't line up, that's a live question now, not a formality.

The one we see most: parents give their adult child a house. A wedding gift, maybe, or they just quietly settle the bond one year. Nobody records it as a donation, because nobody thinks of it that way at the time. Every person can give away R150,000 a year tax-free. Above that, it's 20%. A house is worth a lot more than R150k.

Years later, the child sells the house. SARS asks the obvious question: where did this come from? "My parents gave it to me" is the honest answer. The next question is whether the parents ever paid donations tax on it. If they didn't, someone owes 20% of the value, plus years of interest — and because SARS can go after the person who received the gift when the donor never paid, that bill can land on the child. Not the parents who gave it.

None of this shows up when the gift is made. It shows up when the asset moves again, years later, with interest running the whole time.

Why this matters

None of the things in this article cost the taxpayer a cent in tax at the time. That's exactly why they get left off — there's no financial reason to report something with a zero tax result in the moment.

But a gap between what SARS can see and what you've declared doesn't stay hidden. It surfaces later, on someone else's timeline, usually with less goodwill than if you'd disclosed it upfront.

This is also, honestly, what a tax practitioner is actually for. Filling in the form is the easy part. The value is knowing which of today's transactions creates tomorrow's problem — and dealing with it while it's still simple, instead of ten years from now with interest attached and someone else asking the questions.