April's petrol price may be 25% higher than a year ago. Here's how much is going to tax Business Insider SA facebook Petrol looks set for a hike of almost R1.20 in the first week of April. The price of Gauteng 95 unleaded petrol looks set to reach R17.48 - 25% more than a year ago. Some 35% of the fuel price will go towards tax. For more articles, go to www.BusinessInsider.co.za. South African fuel prices look set for a monster hike in the first week of April, which could mean that the petrol price increased by 25% in a single year.