Gas vs electric car cost: build the comparison from your driving
Compare gasoline and EV costs using energy, charging, purchase price, insurance, depreciation and real driving patterns instead of fuel savings alone.
Electric vehicles can cost much less to energize than gasoline vehicles in some situations, but “electricity is cheaper than gas” is not a complete ownership analysis. A useful comparison starts with your annual distance and local energy prices, then adds the vehicle-specific costs that can change the result.
Calculate gasoline cost from litres, not guesses
For a gasoline vehicle, annual fuel use equals annual distance divided by 100 and multiplied by the vehicle's L/100 km. Multiply those litres by your expected average fuel price. A vehicle driven 18,000 km per year at 8.5 L/100 km would use about 1,530 litres. At $1.55 per litre, that is roughly $2,372 per year before price changes.
Use an efficiency number that reflects your driving. A highway-heavy commute can be different from short winter trips in traffic. If your current vehicle displays long-term average fuel economy, that can be more useful than a brochure rating for personal budgeting.
EV charging cost depends on where you charge
EV efficiency is commonly expressed as kWh/100 km. Multiply that figure by annual distance to estimate energy use. Then apply the electricity rate. The complication is that home electricity and public fast charging can have very different prices.
A driver with inexpensive home electricity can have a much lower blended rate than someone who depends on public fast chargers for most charging.
Charging losses, battery conditioning and cold weather can increase the electricity drawn from the wall compared with the energy used to move the vehicle. For conservative planning, increase the kWh/100 km assumption rather than relying on a best-case efficiency number.
Energy savings do not automatically recover a higher purchase price
Suppose the EV saves $1,500 per year in energy but costs $10,000 more to acquire after incentives. Ignoring financing and resale value, the simple energy-only payback would be more than six years. If the price gap is only $3,000, the same energy savings have a very different impact.
Financing matters because a higher purchase price can create a larger loan and more interest. Insurance can also differ. Obtain real quotes for both vehicles rather than assuming the EV will cost the same to insure.
Depreciation can dominate the comparison
A few thousand dollars of extra resale value or extra depreciation can outweigh several years of fuel savings. EV resale values can be affected by incentives on new vehicles, battery technology changes, charging standards, model updates and used-market demand. Gas vehicles face their own market risks as fuel prices and consumer preferences change.
Use multiple future-value scenarios instead of treating any depreciation forecast as certain. DriveMath’s Depreciation Calculator is designed around user-entered future values for exactly that reason.
Maintenance is different, not zero
EVs remove oil changes and many engine-related service items. Regenerative braking can reduce friction-brake use. But tires, suspension, cabin filters, wheel alignments, HVAC components and other normal vehicle items still exist. Heavier vehicles and high torque can also affect tire wear depending on driving style.
A gasoline vehicle may have more routine engine and transmission service but can sometimes be cheaper to repair outside warranty depending on the model and local service network. Use model-specific maintenance information when comparing two actual vehicles.
Charging access can be worth more than the spreadsheet suggests
A homeowner with reliable overnight charging can start most days with a charged vehicle. A renter without assigned charging may face time and inconvenience that is difficult to express as dollars. Likewise, a driver who frequently takes long trips may value fuel-stop speed or may find that available fast-charging routes work perfectly well.
Build the comparison in layers
First use the Gas vs EV Cost Calculator to isolate energy spending. Then compare payment, insurance and maintenance using the Compare Two Cars Calculator. Finally, include depreciation and your intended ownership period. The result may still favor one vehicle clearly, but now the conclusion comes from your numbers rather than a generic claim about EVs or gasoline cars.
Use your numbers
Turn the guide into a calculation.
The best decision is built from the actual price, rate, mileage and costs that apply to you.