Electric vs Petrol Car Cost Calculator (South Africa)

It depends on you, and that is the honest answer this calculator is built to give. An electric car is cheaper to run, often by half or more per kilometre, but it costs more to buy and loses value faster in South Africa's thin used market. Whether it works out cheaper overall comes down to how far you drive, how long you keep it, how much of your charging is at home, and how big the price gap is between the two cars you are actually choosing between. For a low mileage driver who trades in every three years, petrol usually still wins. For a high mileage driver who charges at home and keeps a car for seven or eight years, the electric car often comes out ahead. Put your own numbers in and the tool shows you the break-even year, the point where the cheaper running finally pays back the higher price.

Yes, on energy and maintenance, clearly. Charging at home at around R3.50 a kWh, a typical electric car uses roughly R55 to R70 of electricity per 100 km, against R180 to R210 of petrol for a comparable car, which works out to about R0.55 to R0.70 a kilometre for the electric car against R1.80 to R2.10 a kilometre for petrol. It also skips oil changes, filters, spark plugs, exhaust and clutch work, so servicing tends to be lower too. The catch is that running cost is only part of the story. The value the car loses and the interest on a bigger loan are usually larger costs than fuel or charging, and on those two the electric car is currently at a disadvantage in South Africa. That is why this tool adds up everything, not just the charging.

It depends heavily on where you charge. At home you pay your normal household electricity rate, which for most people on the higher usage blocks sits somewhere between R3 and R4.50 a kWh, so a full week of commuting might cost a few hundred rand. Public fast charging is far dearer, the main networks like GridCars and Rubicon charge around R7 to R8 a kWh, roughly double the home rate, and closer to the cost of petrol per kilometre. This is why home charging is the single biggest factor in whether an electric car saves you money. The calculator lets you set the share of home versus public charging and blends the two into your real cost per kilometre.

You do not strictly need one, an electric car will charge from an ordinary plug, but it is very slow, often 20 hours or more for a full charge, so almost everyone who can fits a proper home charger. A wall mounted AC charger, usually around 7kW, tops the car up overnight in a few hours. In South Africa a home charger and its installation typically runs somewhere between R10,000 for a basic setup and R35,000 for a smart charger with all the electrical work that goes with it, a dedicated circuit, cabling and often surge protection. Some new electric cars include a charger and installation as part of the deal, so it is worth asking, and you would set the charger field to zero if yours does. Because it is a once-off cost tied to running the car, the calculator spreads it over the years you keep the vehicle and adds it to the electric car's monthly figure, which is why fitting one nudges the break-even a little later. It only makes sense if you can actually charge at home, in a flat or complex without off street parking it is usually not an option, which is a big part of why home charging matters so much to the sums.

Because the second hand market for them is still small and buyers are cautious. Used car shoppers worry about battery health, the cost of an out of warranty replacement, and how quickly the technology is moving, so they pay less for a three or four year old electric car than for an equivalent petrol one. Early data points to electric cars shedding something like 65 to 70 percent of their value over five years against 55 to 60 percent for established petrol models, though this varies a lot by brand and is likely to improve as the market matures. Depreciation is usually the biggest single cost of owning any car, so this faster loss of value is the main thing that can cancel out an electric car's cheaper running. The tool defaults the electric car to a faster loss for this reason, and lets you set your own figure if you have a better one.

Then the numbers change a lot, and often not in the electric car's favour. Relying on public fast charging at around R7 to R8 a kWh, an electric car can cost nearly as much per kilometre to power as a petrol car, while still costing more to buy and losing value faster. Electric cars make the most financial sense when you can plug in at home overnight on a cheap household rate, or charge at work for free. If you live in a flat or complex without a charger, or you would depend on public chargers for most of your driving, the calculator will show that petrol is usually the cheaper choice, and it flags this for you when your home charging share is low.

Modern electric car batteries are designed to outlast the rest of the car for most owners. They typically come with an eight year or 160,000 km warranty that guarantees the battery will still hold a set share of its capacity, usually around 70 percent, and in practice most batteries last well beyond that. A full replacement is expensive, often somewhere between R150,000 and R400,000 depending on the car, but it is rare within the warranty period and uncommon for years after. This calculator does not add battery replacement as a monthly cost, because for a car kept inside its warranty it would overstate the real risk. If you plan to keep an electric car well past its warranty, treat a possible battery cost as a risk to budget for separately.

Insurance is usually a little higher, commonly about 10 to 15 percent more than a comparable petrol car, because parts and specialist repairs cost more and the repair network is still growing. Servicing, on the other hand, is generally cheaper, an electric car has far fewer moving parts, no oil, filters, spark plugs or exhaust, and brakes that wear more slowly thanks to regenerative braking, so routine maintenance tends to be lighter. Tyres can wear a bit faster because electric cars are heavier and have instant torque. The calculator lets you set insurance and maintenance separately for each car, with sensible South African defaults, so you can use your own quotes where you have them.

Choose the electric car if you can charge at home, you drive a lot, and you plan to keep the car for many years, because that is where the cheaper running overtakes the higher price and faster depreciation. Lean towards petrol if you drive relatively little, you would depend on public charging, you trade cars in every few years, or the price gap to a comparable electric model is large. There is also more to it than money, an electric car is quieter and cheaper to fuel day to day, while a petrol car refuels in minutes and travels further between stops, which still matters on long South African road trips. The calculator settles the money question honestly for your own situation, then you can weigh the rest.