Statistics South Africa's June figures put annual consumer inflation at 5.0%, a two-year high, above the top of the Reserve Bank's target range. Transport was the largest single contributor, at 12.7% annual inflation against 9.4% in May.

The fuel line is where it comes from. Fuel prices rose 34.3% year on year in June. Diesel rose 50.8%. Petrol rose 31.7%.

For anyone running outbound distribution or a last-mile fleet, that number lands directly on your cost per drop.

What June's numbers say

Two things happened at once, and they pull in opposite directions.

Food inflation slowed to 1.4% year on year, its lowest since late 2010, on the back of a record 21.5 million-tonne summer crop. FNB Commercial senior agricultural economist Paul Makube noted the harvest was up 5% year on year and that cereal products have been deflationary since January.

Makube also made the point that matters operationally. "About 80% of food distribution is done by road." Cheap product moving on expensive wheels compresses margin in the distribution leg, not at the farm gate.

The near-term outlook is not helpful. Brent opened July around $72 a barrel, went above $100 as US and Iran hostilities resumed, and settled near $88 late in the month. IOL's Central Energy Fund snapshot on 28 July pointed to August diesel increases of between R1.63 a litre for 50ppm and R1.80 for 500ppm, possibly R1.30 to R1.50 if crude keeps retreating. That follows a July decrease of R3.14 to R3.58 a litre, so the net position over two months is still better than April and May, but the direction has turned again.

Wholesale 500ppm diesel was listed at R23.91 at the coast and R24.78 inland in late July, with 50ppm at R24.41 and R25.16.

Meanwhile the demand side keeps growing. Checkers Sixty60 grew sales 34.6% to R11.9 billion for the six months to 31 December 2025 and now operates from more than 870 stores, plus six dark stores across the Western Cape, Gauteng and KwaZulu-Natal. Woolworths opened another Woolies Dash dark store in Wynberg. Pick n Pay put its Gemini-powered asap! assistant live on 6 July 2026. More orders, smaller baskets, tighter windows, on a fuel base that moved 50% in a year.

The electrification case, and its limits

On 31 July, an EV100 and Zimi webinar put a number on the commercial fleet opportunity: R19 billion by 2030, citing GreenCape research.

The operating numbers are more useful than the market size. EV100 international relations manager Thyla-Jay Quickfall said fleet operators are reporting operational savings of 30% to 70% from early EV deployments, and that truck pilots have shown annual savings of R500 000 to R650 000 per vehicle through lower fuel and maintenance costs. She named last-mile delivery as one of the strongest use cases, because high-mileage fleets with predictable routes suit electrification.

The caveats were stated as clearly as the upside. Adoption depends on certainty around total cost of ownership, charging infrastructure, financing and policy. Priyam Reddy of the International Council on Clean Transportation said charging is expanding along key freight corridors, but South African EV policy remains aimed largely at building local manufacturing capacity rather than encouraging uptake.

Read plainly, that says a metro last-mile fleet with a depot, a fixed route set and a five-year replacement cycle can build a defensible case now. A long-haul operator running the N3 cannot, yet.

Levers inside this fiscal year

Most South African distributors will not electrify anything before March 2027. The levers available in the current fiscal year are operational, and they are worth more than they were when diesel was 50% cheaper.

Cube utilisation is the first one. Every extra litre of air in a carton or on a pallet is now being moved at R24 a litre of diesel. Cartonization and pallet build rules that were set when fuel was a smaller share of cost per drop are quietly expensive. This is measurable in a week: pull your average fill percentage by route and compare it to your theoretical maximum.

Drop density is the second. If your last-mile routing still batches by order receipt time rather than by geography plus service window, you are paying the June fuel price for avoidable kilometres.

The third is knowing your actual cost to serve per customer, per drop, at current fuel. Many distributors are still quoting delivery on a rate card built at 2024 diesel. At a 50.8% year-on-year increase, the customers who look most profitable on the sales report are often the ones destroying margin in the yard.

None of this needs capital. It needs your own data, read honestly.

OptiChain Solutions works with South African distributors on cost to serve, route and load design, and warehouse process improvement. If you have not repriced your delivery economics since diesel moved, that is where to start.

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