The Central Energy Fund calculates what petrol, diesel and paraffin would cost to import each day, using international product prices and the rand-dollar exchange rate. At the end of each month the department adjusts regulated prices by the average gap over the month, and the change takes effect on the first Wednesday of the next month.

Fuel taxes, the Road Accident Fund levy, transport costs and industry margins are added to that basic fuel price. Our explainer, How South Africa's fuel price is set, breaks down every part of a litre.