The True Cost of Card Fees: Why 3% of Turnover Can Be 30% of Your Profit

A 2.5% merchant service fee doesn't sound like much. Set against turnover, it barely registers. Set against net profit, the picture changes completely, and that's the number most business owners never actually run.

Take a Durban coffee shop that's gone fully cashless: R400,000 a month in turnover, a healthy 10% net margin, every sale through a card machine. Run the numbers and that shop pays around R11,800 a month in card fees. Against R40,000 of net profit, that's not 2.95% of anything. It's close to 30% of what the owner actually takes home.

That gap, between the percentage printed on your statement and the percentage of your actual profit, is the whole point of this article.

Who actually sets the fee

Every card transaction in South Africa splits into three components, and only one of them is yours to negotiate.

You never see this breakdown. Your statement shows one combined percentage, and it's tempting to treat the whole thing as a black box your bank controls. It isn't.

Interchange is regulated by the South African Reserve Bank through its Interchange Determination Project, which has set rates since 2014. Credit card interchange sits roughly between 1.4% and 1.9% for card-present transactions. Debit card interchange is considerably lower. Online transactions, where the card isn't physically present, carry a higher rate, closer to 1.7%, because SARB prices in the extra fraud risk. None of that is up for discussion with your bank, and neither is the Visa or Mastercard scheme fee.

What's left is the acquirer margin, and that's where the real spread in what merchants pay comes from. Add all three components together and the blended merchant service fee typically lands between 2.5% and 3.5% for card-present sales, more for card-not-present. Large retailers negotiate the acquirer margin down hard because of volume. Small businesses generally don't have the leverage to, which is most of the reason a supermarket chain can pay under 1% while a small retailer pays 2% to 3% for the exact same interchange and scheme fee.

Worth knowing: South African payment rules don't allow you to add a surcharge for paying by card. You can't pass this fee straight back to the customer. It gets absorbed into pricing or carried as a cost line, there's no third option.

What merchants are actually paying right now

Most small and medium businesses don't negotiate directly with a bank anymore. They sign up with a card machine provider, and the provider's headline rate is effectively their blended MSF. As of 2026, that looks roughly like this:

• Yoco: 2.95% per transaction, plus a R2.50 daily fee on days the machine is used, no monthly rental
• iKhokha: tiered from 2.50% to 2.75%, dropping as monthly volume grows, plus a R75 monthly SIM fee on standalone devices
• VodaPay Kwika: from around 1.85% at higher volumes
• Capitec: R599 once-off hardware, tiered transaction rates that are competitive at low volume

Real numbers, off current rate cards, and they cluster in a fairly narrow band for a typical small business: somewhere around 2.5% to 3%. Hold onto that number, because it's the one that feeds the calculation that actually matters.

The calculation that actually matters

Turnover is the wrong denominator. Profit is the right one.

The formula is simple: divide your effective MSF by your net margin, and you get card fees as a share of your profit rather than your turnover. A 3% fee against a 10% margin is 30% of profit. That same 3% fee against a 30% margin is 10% of profit. The fee hasn't changed. What it costs you has, and it depends entirely on how thin your margin already is.

Here's how that plays out across three realistic South African businesses.

The café has gone fully cashless and pays the standard aggregator rate, and nearly a third of its profit goes straight to card fees. The general retailer has a thinner margin but a negotiated bank rate and a meaningful chunk of cash trade, and still loses close to a fifth of profit. The e-commerce business pays the highest MSF of the three, because card-not-present transactions carry a higher interchange rate and a higher fraud premium, and loses close to a third of profit as a result, on top of an already leaner margin once logistics and marketing costs are in.

None of these owners would look at their statement, see 3%, and think it was a serious problem. All three should.

What you can actually negotiate

Interchange and scheme fees are fixed. The acquirer margin isn't, and neither are several things around it.

You can negotiate the acquirer margin itself once your volume gives you something to negotiate with. Terminal rental, monthly service fees, and gateway fees are separate line items too, and each one is up for discussion on its own. Push on settlement timing: same-day settlement is worth something, and slower settlement should cost less. There's also a real choice between blended pricing, one flat rate covering everything, and interchange-plus pricing, where interchange passes through at cost with a separate visible margin on top. Interchange-plus is usually cheaper once you're doing enough volume to see the acquirer's actual cost. Contract length matters too, and shorter is better while you're still growing into your rate.

For most small businesses starting out, the more realistic lever is simpler: shop between the aggregator apps as your volume grows. The machine that made sense at R50,000 a month in turnover isn't necessarily the cheapest one at R500,000.

Cash isn't free either

This is the part that gets missed. Card fees get resented because they're visible, one line, clearly labelled. Cash costs money too, it just doesn't show up as neatly, so it's easy to assume it's free.

It isn't. Deposit fees alone run between R0.85 and R1.50 per R100 deposited at the big banks, whether that's Capitec or one of the big four, for standard branch or teller deposits. On R240,000 of monthly cash trade, that's somewhere between R2,040 and R3,600 a month before anything else happens to that cash. ATM deposits are considerably cheaper than branch deposits, sometimes by as much as 75%, so a business that's disciplined about which channel it uses can bring that down. Most aren't, and most don't check.

Beyond the deposit fee, cash carries costs that never show up as a percentage on any statement. Cash-in-transit services from the big three, SBV, Fidelity, and G4S, are quote-based and scale with collection frequency and risk profile. There's no public rate card, because pricing is negotiated individually. Staff time spent counting and reconciling a till at close is real cost, even when nobody's costing the hours. Till shortages and shrinkage are real too, and South African retailers don't publish reliable numbers on this, which is itself telling: card fees get itemised on a statement, cash losses tend to get absorbed and forgotten.

There's decent independent evidence this pattern holds more broadly. A 2017 study commissioned by Mastercard and carried out by Genesis Analytics, still the most detailed public breakdown available for South Africa, found that cash cost South African consumers around R23 billion a year, and that 61% of that cost was indirect: time, travel, foregone interest, theft, rather than a fee anyone could point to on a statement. That study measured consumer cost rather than merchant cost, but the mechanism is the same one playing out on the business side. The visible cost of card fees gets scrutinised. The invisible cost of cash mostly doesn't, because there's no line on a statement forcing the conversation.

What this actually means for your business

Three numbers to know before deciding whether your card fees are a real problem or background noise:

• Your effective MSF, taken from your actual settlement statement, not the headline rate you signed up for
• Your card-to-cash split in rand value, not transaction count, since a handful of large cash transactions can matter more than plenty of small card ones
• Your net margin, because that's the denominator that turns 2.95% into either nothing or a serious drag on what you take home

If you're cash-heavy, don't assume you're saving money by default. Add up the deposit fees at your actual rate, get a real CIT quote if you use one, and put a number on the staff time spent counting and reconciling. The comparison is rarely as one-sided as it feels standing behind the till.

Once you know your real numbers, negotiate the part that's actually negotiable: the acquirer margin, the terminal costs, the pricing structure. On a thin margin, half a percentage point off your MSF can be worth more than a meaningful jump in sales, and it takes a fraction of the effort.

To compare deposit fee structures across banks directly, the Launchworks business banking tool is built for exactly this: launchworks.co.za/tools/business-bank-account