Diesel jumped R2.84 a litre on 7 October. Your R5,488 food basket has not felt it yet

One truck burns R1,471 more diesel on a single trip from Johannesburg to Cape Town today than it did in September. On our maths, it is the first link in a chain that ends on your supermarket shelf, and most of that chain has not reached you yet.

On Wednesday, 7 October, petrol 95 inland jumped R3.33 to R30.25 a litre. Petrol got the headlines. Diesel is the fuel that moves your food. The wholesale price of 0.05% diesel rose R2.84 to R31.95 a litre inland, and the cleaner 0.005% grade rose R3.24 to R33.29.

Groceries will cost more, and the rise will take weeks to show on shelves.

How much more does one truck trip cost after 7 October?

Start with a long-haul truck. Johannesburg to Cape Town is about 1,400 km. Logistics planners use a standard rate of 37 litres per 100 km for a truck. That works out to 518 litres a trip.

Source: Department of Mineral and Petroleum Resources price announcement for October 2026, our maths on a 37 litres per 100 km planning rate.

These are fuel costs only, one way, at the wholesale price. They leave out tolls, tyres, the driver and the trip back. A real invoice is higher. And that R1,471 is paid again on every trip, by every truck that carries food.

Photo: Edward Middleton / Wikimedia Commons, CC BY-SA 4.0

Why do shop prices rise a month after the fuel price?

Because diesel hits your food more than once before it reaches the shelf.

It starts on the farm. AgriSA and Agbiz put fuel, mainly diesel, at 12% to 18% of farm production costs, according to Business Day on 14 April 2026. Tractors, harvesters and irrigation pumps all run on it. Wholesale diesel is up 9.8% on September, from R29.11 to R31.95. If all that farm fuel is diesel and the farmer pays the full rise, farm costs go up about 1.2% to 1.8% from this one hike. That is our maths, not an official figure.

Agricultural economist Wandile Sihlobo has estimated that about 75% of South Africa's maize, wheat and oilseeds move by truck between farms, silos and markets. Maize becomes maize meal. Wheat becomes bread. Oilseeds become cooking oil.

Read nextSouth Africa makes 39% of its own fuel, down from 78% in 2019

Shops sell stock they bought weeks ago, and suppliers agree prices ahead of time. So a fuel hike on 7 October creeps onto shelves slowly. A food-basket monitoring group has warned that any diesel increase will flow through to food prices, and that vegetables are among the items most likely to rise first.

And this is not the first hike. Diesel also went up on 2 September, by between R2.94 and R3.15 a litre depending on grade. Add October's rise and diesel has climbed about R6 a litre in two months, roughly 23% on our maths.

For the bigger picture of how the world got here, read our explainer on the oil shock behind the diesel crisis.

What do the official numbers say today?

The table below lists every number that matters, with its date. We will keep it up to date as new figures land.

PMBEJD is the Pietermaritzburg Economic Justice and Dignity Group, which prices 44 everyday foods every month.

R5,379.42Sep 2025

R5,530.52Jul 2026

R5,479.80Aug 2026

R5,488.06Sep 2026

Sep 2025	R5,379.42
Jul 2026	R5,530.52
Aug 2026	R5,479.80
Sep 2026	R5,488.06

Source: PMBEJD Household Affordability Index, reported by IOL (Sep 2025) and TimesLIVE (Sep 2026).

Food inflation is only 1.1%. So is the chain reaction real?

This is the part that surprises people. Official food inflation is almost flat.

July's 0.9% was described as the lowest in more than 16 years. August's 1.1% was the first rise in nine months, according to EWN. The PMBEJD basket tells the same story. It is up about R109 on a year ago, from R5,379.42 in September 2025, and in August 25 of its 44 items actually got cheaper.

Now put that next to fuel, which is running at 20.6% more than a year ago. Those two numbers sit very far apart. Food has had a calm run while fuel costs piled up behind it. That is exactly why the delay matters, and why people feel caught out when the shelf prices finally move.

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Every food number above was measured before the 7 October hike.

How does the chain reach the milk fridge and the taxi rank?

Cold food has a second diesel bill. Milk, yoghurt and chicken travel in refrigerated trucks, and many of those fridge units burn diesel too.

Photo: Husskeyy / Wikimedia Commons, CC BY-SA 4.0

Then there is you. To buy any of this, you first have to get to the shop. Santaco says diesel is the main fuel for most minibus taxis, so the same hike that hits the truck hits your fare. We did the maths in our story on what R30 petrol means for taxi fares.

The PMBEJD shows how little room low-paid workers have. It uses the national minimum wage of R30.23 an hour, which is R5,078.64 for a 21-day month. In September, transport and electricity alone took R3,279.45 of that, or 64.6%. That leaves R1,799.19 for everything else, including food.

The basket for a family of seven costs R5,488.06. What is left of one minimum wage covers about a third of it.

If you want to see where each rand of the petrol price goes before it spreads into food, we broke it down in where the money goes at R30 a litre.

Photo: Soulful sunshine / Wikimedia Commons, CC BY-SA 4.0

When will October's diesel hike show up in the food basket?

Not yet, and that is the whole point of this story.

The September basket of R5,488.06 was priced before 7 October. Neither the R2.84 on diesel nor the R3.33 on petrol is in it. The PMBEJD has published at the end of each month lately, on 26 August and 30 September. If that rhythm holds, the October basket is the first one that could show the damage. Stats SA's September inflation figure also lands in October, but it covers a month before the hike.

The next fuel price change is announced on 4 November. Our forecast for the next petrol price tracks that number as it moves, and our petrol price topic page keeps every story in one place.

Every rand in that R5,488 was set at September's diesel price. October's has not reached a single shelf yet.