South African motorists face another severe fuel price hike in September 2026, driven by soaring international refined fuel costs and Middle East supply disruptions. Mid-month Central Energy Fund data points to steep underrecoveries, pushing diesel costs higher by up to R2.89 per litre.
Soaring Underrecoveries and the September Fuel Outlook
South Africans are staring down the barrel of another punishing month at the fuel pumps. Following aggressive climbs earlier in the year, fuel prices are on course to increase significantly in September, compounding the financial strain on households and businesses alike. Year-to-date figures show the price of 95-octane petrol has already risen by more than R4, or roughly 20%, while the wholesale price of diesel has jumped by more than R6.30, representing an increase close to 33%.
Mid-month data compiled by the Central Energy Fund indicates that petrol prices are set to rise by between 63 and 74 cents a litre. Meanwhile, the underrecovery on diesel sits at an alarming scale, ranging between R2.73 and R2.89 per litre depending on sulphur content, alongside a R2.15 per litre paraffin underrecovery.
These underrecoveries mean regulated prices must rise to recoup the widening gap between domestic prices and open-market import costs. For Gauteng motorists, the accumulated toll is stark: a 50-litre tank of petrol already costs R208.50 more than it did previously, while an equivalent tank of diesel requires an extra R319.
Middle East Conflict and the Refined Fuel Disconnect
The underlying driver of September’s expected misery lies entirely in international markets. While global crude benchmarks tell a slightly forgiving story—with Brent crude having dropped after spiralling to above $100 per barrel in mid-July—refined fuel products have utterly decoupled from that trend.
The price of refined fuel on global markets is contributing almost R3 per litre directly to the underrecovery on imported diesel. This disconnect stems from renewed geopolitical flashpoints in the Middle East that continue to put pressure on global oil markets and disrupt supply routes.
Oil price volatility intensified after threats of an indefinite naval blockade emerged amid stalled peace negotiations. Treasury Secretary Scott Bessent issued severe warnings, threatening Iran with measures like have never been seen in the history of economic isolation of a country.
In response, Tehran has maintained blockades on most commercial shipping navigating the Strait of Hormuz, a critical maritime corridor that handled roughly a fifth of global oil and gas transportation before the conflict erupted on 28 February.
A Resilient Rand Softens the Blow
Amid the turbulent global backdrop, the South African currency has acted as a rare financial buffer. Analysts note that fuel prices remain heavily dependent on developments in the region, but local currency strength has successfully clawed back some ground.
The remarkably resilient rand has countered international increases by providing a relief of between 10c and 14c per litre. After nearly weakening to R17 against the dollar in late July, the local unit has held firmly below R16.55 for the past two weeks, even strengthening to approximately R16.10.
Wage Adjustments and Regulatory Levies
Beyond global crude pressures and exchange rates, domestic structural adjustments loom over the fuel forecourts. September traditionally marks the window for adjusting retail margins on fuel to incorporate staff wage increases negotiated through the Motor Industry Bargaining Council.
The timing of these adjustments can shift monthly calculations. Last year, industry-labor agreements were finalized late and gazetted afterward, pushing the 6.1c-per-litre retail margin increase into October instead. Additional pressure may come from the slate levy, which currently sits at just under 62c per litre for petrol and diesel. The levy operates retroactively, keeping the Central Energy Fund afloat by compensating fuel importers when open-market purchase costs exceed regulated domestic prices.
Final Adjustments Before the September Take-Effect Date
With half of the pricing window still ahead, final adjustments remain subject to change based on daily market shifts. September’s official fuel prices will be calculated across a four-week monitoring period stretching from 31 July to 27 August.
The resulting price changes are scheduled to take formal effect on Wednesday, 2 September. Until then, motorists and broader supply chains must absorb the reality that fuel hikes remain the most likely outcome.
