Most small businesses in South Africa don't overpay tax because they've done something wrong. They overpay because they never claimed things they were fully entitled to. The test is simple enough — an expense is deductible if it's incurred in the production of income and not capital in nature — but the everyday costs that quietly qualify get forgotten, mislabelled, or thrown out with the receipt. Every rand of legitimate deduction you miss is taxed at your marginal or company rate for no reason at all.
The everyday deductions people leave on the table
These are all ordinary, legitimate business expenses that owners routinely fail to record:
- Bank charges and card-machine fees — a few rand each, meaningful over a year, and fully deductible.
- Software and subscriptions — accounting software, website hosting, design tools, cloud storage, the apps you actually run the business on.
- Professional fees — your accountant, bookkeeper, and business-related legal work.
- Business travel and fuel — the business portion of vehicle running costs, tolls and parking, provided you keep a proper logbook.
- Marketing — social ads, flyers, your website, photography and branding for the business.
- Insurance — business cover, professional indemnity, cover on business assets and premises.
- Repairs and maintenance — fixing equipment or premises you already own (as opposed to improving or replacing them, which is capital).
- Bad debts — an invoice you genuinely can't recover can be written off against income rather than sat on.
Home-office costs can be deductible if you work mainly from home and have a space used regularly and exclusively for the business — then you apportion costs like rent, rates and electricity by floor area. The rules are strict and easy to fall foul of. Don't assume; check it against your actual set-up before you claim, because a loose home-office claim is a classic audit trigger.
The capital-vs-running-cost trap
This is where owners lose the most, and occasionally where they get it wrong in the other direction and land themselves in trouble. A running cost — rent, salaries, stock, a monthly software subscription — is deducted in full in the year you incur it. A capital asset — a laptop, a delivery vehicle, machinery, a generator, shop fittings — is not. You cannot write the whole thing off the year you buy it. Instead you claim it gradually through wear-and-tear over the asset's useful life.
Laptop vs laptop subscription — same spend, different treatment
Buy a R25,000 laptop outright and it's a capital asset — you claim wear-and-tear over its useful life, not R25,000 this year. Pay R500 a month for design software, and the full R6,000 for the year is a running-cost deduction straight away. Same 'tech spend', completely different timing of the tax relief. Owners who don't know this either miss the wear-and-tear entirely, or wrongly expense the whole asset and invite a SARS adjustment.
How wear-and-tear actually works
The point of wear-and-tear isn't to deny you the deduction — it's to spread it. You still get relief on the full cost of a capital asset; you just get it over the asset's useful life rather than all in year one. So that R25,000 laptop written down over, say, three years gives you a slice of deduction each year until it's fully claimed. Bigger items like a delivery vehicle, a generator or machinery follow the same logic over longer lives. The trap isn't the rule — it's forgetting to claim it, so an owner buys a capital asset, can't write off the full cost immediately, and then never sets up the wear-and-tear at all. Over a few years of equipment purchases, that's real money quietly left with SARS.
What a year of 'small' missed deductions adds up to
Picture a modest business that forgets R2,500 a month of bank charges, subscriptions and professional fees, misses R18,000 of business travel with no logbook, and never sets up wear-and-tear on R60,000 of equipment. That's easily R60,000–R80,000 of deductions gone in one year. At a 27% company rate, forgetting them hands SARS in the region of R16,000–R21,000 you never owed. None of it was aggressive — it was all just left in the drawer.
The deductions people wrongly assume are open doors
Some costs feel deductible but are limited or excluded, and over-claiming them is how a clean set of books starts to look aggressive to SARS. Entertainment is the big one — client lunches and hospitality are restricted, so they aren't the open door people assume. Fines and penalties aren't deductible at all. The private portion of anything you use for both business and personal — your car, your phone, your home internet — has to be stripped out honestly. And drawings you take for yourself aren't an expense; they're not deductible, however much it feels like money going out. Coding these correctly rather than optimistically is what keeps you both fully claimed and defensible.
No records, no deduction
A deduction you can't prove is a deduction SARS can disallow — and it will, at audit, no matter how real the spend was. You need to keep the supporting records — tax invoices, receipts, bank statements, logbooks — for five years. In practice this is where deductions are actually lost: the expense was genuine, but the paperwork went in the bin, so at assessment there's nothing to back it up. A shoebox of fading till slips is not a filing system, and a bank statement line on its own often isn't enough — SARS wants the invoice behind it. The fix is to capture as you go: photograph or forward each receipt into your accounting software the day you get it, so the proof is attached to the transaction and there's nothing to reconstruct a year later.
The quiet cost of doing this yourself
None of this is about aggressive schemes or grey areas. It's about claiming what you're already entitled to and coding it correctly — running cost versus capital, deductible versus limited, business versus private. That's ordinary bookkeeping done properly, and it's usually the difference between a fair tax bill and one that's needlessly high. The businesses that pay the least tax legally aren't the ones with clever schemes — they're the ones whose every genuine cost is captured, categorised and backed by a valid invoice, month after month, so nothing legitimate ever slips through. If you're not confident every legitimate expense is being captured and treated correctly, talk to us — closing exactly that gap is what we do.