South Africa's Basic Fuel Price is calculated from the international price of refined petrol and diesel, which is set in US dollars, converted into rand at the average exchange rate over the review period. That means two things move it every month: the dollar price of the fuel itself (driven mainly by Brent crude), and the rand-dollar exchange rate. Most commentary focuses on whichever one makes a better headline that month. The real breakdown, using the Central Energy Fund's own published contribution figures, is more specific — and the rand is usually the smaller of the two.
What the rand actually contributed, month by month
| Month | Rand/dollar move | Petrol BFP contribution | Direction |
|---|---|---|---|
| January 2026 | 16.84 → 17.23 (weaker... then recovering) | −20.8c/l | Rand effect eased price |
| February 2026 | 16.85 → 16.31 (stronger) | −28.5c/l | Stronger rand, lower price |
| July 2026 | 16.52 → 16.38 (stronger) | −11.3c/l | Stronger rand, lower price |
| August 2026 | 16.34 → 16.46 (weaker) | +6.4c/l | Weaker rand, higher price |
Even in the months where the rand moved meaningfully — a 4-5% swing in February, for instance — its contribution to the pump price stayed in the tens of cents per litre, not rands. Compare that to what crude oil did in the same period.
The same months, with crude oil's contribution alongside
July 2026 is the clearest example of the two forces pulling in different sizes. Brent crude fell from an average of $104.59 to $86.53 a barrel over the review period — a drop that, on its own, cut the petrol Basic Fuel Price by roughly R2.96/litre. The rand strengthened over the same period, adding its own small saving of about 11 cents/litre in the same direction. Crude did nearly 27 times more of the work that month.
When the rand does matter more
There are months where the currency carries more weight — typically when crude is relatively stable and the rand itself is volatile. One widely-reported stretch between February and March 2026 saw the rand weaken from an average of 15.9959 to 16.6429 against the dollar, contributing an estimated +56.2c/litre to petrol and +77.3c/litre to diesel — diesel is consistently more exposed to a given rand move than petrol, for the same reason it's more exposed to crude moves (see our why diesel rises more than petrol breakdown). In a month like that, the rand genuinely is the bigger story.
By mid-October 2026, the rand had weakened further to around R16.48/$ against roughly R16.10-16.30 earlier in the month — one of the factors behind November's early fuel price projections showing a continued increase. See November 2026 fuel price predictions for how that's factoring into next month's numbers.
What this means for predicting your own fuel price
If you're trying to anticipate next month's adjustment from the news, don't anchor on the rand alone — check what Brent crude has done over the same stretch. A rand move without a matching oil story usually means a smaller fuel price change than the exchange-rate headlines suggest; a rand move alongside a big crude swing in the same direction means the two are compounding, and the adjustment is likely to be bigger than either one would suggest on its own.
Frequently asked questions
Rand/dollar and Brent crude contribution figures above are drawn from South African fuel-price industry reporting on the Central Energy Fund's own published Basic Fuel Price breakdowns through 2026. Exact cent-per-litre contributions can vary slightly between reporting sources depending on the exact review window used. Always check this site's monthly fuel prices page for the current confirmed price.
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