Mid‑month data point to sharp September 2026 fuel price rises in South Africa

On 20 Aug 2026 mid‑month Central Energy Fund data reported projected September 2026 increases of 66–85c/l for petrol, R2.73–R2.99/l for diesel and ~R2.14/l for illuminating paraffin; the Department of Mineral and Petroleum Resources will confirm official adjustments before the first Wednesday of September.

If confirmed, these estimated fuel price rises would directly lift South Africa’s headline CPI and the nominal yield curve; higher expected inflation typically raises demanded real yields, putting upward pressure on belly and long‑end local rates. The scale of any market reaction will depend on the confirmed September adjustments and whether fiscal or monetary responses alter inflation expectations.

Official September fuel price adjustments to be published by the Department of Mineral and Petroleum Resources before the first Wednesday of September 2026.