How to compare EV ownership costs with petrol cars in a realistic way

Many people are interested in an EV but are unsure how the real costs compare with a petrol car. List prices, fuel, maintenance and resale all interact in ways that are easy to misjudge if you only look at one number.

This guide walks through a simple way to compare total costs, using a few key questions and avoiding overly optimistic savings claims. You can adapt the steps to your local prices and rules.

Start with how much you actually travel

Any cost comparison should begin with distance. A high‑mileage commuter who covers 25,000 kilometres a year will see cost patterns very differently from someone who mainly makes short trips in town.

Look at the last 12 months of use if you can. Odometer photos from inspections, service records or telematics apps can help. If that is not available, estimate how many kilometres you drive per week and multiply by 52, adding a margin for holidays and weekend trips.

Separate purchase price from running costs

EVs often have a higher upfront price than similar petrol models, although discounts and regional incentives can narrow the gap. It is useful to treat this as one block of cost, then look at ongoing costs as a second block.

If you finance the car, note the interest rate, length of the loan or lease and any balloon payment. Instead of fixating on monthly instalments, write down the full amount you will have paid by the end of the term, including fees. This helps you avoid stretching too far for a low monthly figure.

Estimate energy costs conservatively

Energy is where many people expect big savings, but the picture depends heavily on how and where you top up. Start by checking your recent electricity bills and local fuel prices, then use cautious assumptions.

• Find a typical consumption figure for the EV model in kWh per 100 km, from independent tests where possible.
• Use your own home tariff per kWh, or a blended figure if you expect to use public points regularly.
• Compare with the petrol model’s litres per 100 km and local fuel price per litre.

Run both through the same annual distance. It is wise to leave a margin for rising prices or less efficient winter driving, instead of relying on best‑case numbers from brochures.

Include maintenance, repairs and tyres

EVs typically have fewer moving parts in the powertrain, which can reduce spending on items like oil changes or exhaust systems. However, other components still age in the usual way, and some parts such as tyres may wear faster on heavy, high‑torque models.

Check service schedules for each model, then ask local garages or owner forums what typical visits cost. Include items that affect both types equally, such as brake pads, wiper blades and fluid changes. Aim for a rough annual average rather than chasing perfect precision.

Think about home installation and public access

If you can plug in at home, you may need installation work. Costs vary depending on wiring, distance to the parking spot and local rules. Treat this as an upfront cost spread over the years you expect to keep the car.

If you will rely heavily on public points, factor in the likely price difference between home energy and rapid roadside units. Many networks have membership fees or tiered pricing. A quick survey of networks in your area can prevent surprises once you own the car.

Do not ignore tax, insurance and parking

Some regions reduce registration fees, annual taxes or congestion charges for EVs. Others offer preferential parking or lower tolls. These rules change regularly, so always check official local sources instead of assuming a past benefit still applies.

Insurance can be higher or lower for an EV depending on repair costs, safety ratings and theft risk. Request sample quotes for both models you are comparing, with the same driver profile and coverage level, then use those figures in your cost table.

Consider long‑term value and warranties

Resale value can make a big difference in total cost. EV values are influenced by model reputation, warranty coverage, market supply and how quickly new technology reaches showrooms. Petrol cars are also exposed to future restrictions in some cities or regions.

Look up used prices for three to five year old versions of the models you are considering, or similar vehicles from the same brand. This will not predict the future perfectly, but it gives a sense of how fast each type might depreciate.

Build a simple total cost comparison

Once you have estimates, put them into a straightforward table for the number of years you plan to keep the car. For each option, include: purchase and finance, installation (if needed), energy, maintenance and repairs, tax and insurance, and a rough estimate of resale value.

This exercise rarely gives a single “correct” answer. Instead, it highlights where each option is strong or weak for your situation. You can then adjust assumptions, test high and low scenarios and see how sensitive the result is to distance travelled or energy prices.

Check for non‑financial priorities

Finally, remember that cost is only one part of the decision. Some people value quieter operation and home top‑ups, others prioritise long highway range or quick refuelling. Make a short list of non‑negotiables and see which option fits them best.

Use the cost comparison to keep expectations realistic, then verify current prices, incentives and local regulations just before you commit. That way you can choose an EV, a petrol car or even postpone a purchase with a clear understanding of what it will truly cost you.