Used EV vs Petrol: Understanding the Cost Difference

Choose a consistent comparison boundary

A purchase-plus-running-cost comparison is different from total economic ownership cost. The first adds what you pay for the vehicle and selected running expenses. The second usually accounts for the change in vehicle value and financing costs. Do not mix these methods or count both the full purchase price and depreciation in the same economic-cost total.

Build the running-cost side from local inputs

Use your annual distance, electricity price, battery-side efficiency and charging losses for the EV. For petrol or diesel, use fuel price and consumption with the correct units. US MPG and UK MPG use different gallon sizes; changing one without the other distorts the answer. Add realistic insurance and service figures for each candidate. The cheapest energy scenario may not match your actual charging access.

Understand what break-even means

If an EV costs 5,000 more to buy and saves 1,000 per year in the modelled running costs, the simple purchase premium is recovered after five years. That is a scenario, not a forecast. Resale values, financing, tax, incentives and repairs can change the comparison. If the EV both costs more initially and costs more each year under the entered assumptions, there is no positive break-even in that model.

Stress-test the conclusion

Try a higher electricity tariff, lower annual distance and a less favourable resale scenario. If a small change reverses the outcome, treat the result as sensitive rather than decisive. Obtain local quotes where they matter. EVVerity displays the comparison and its exclusions; it does not instruct you to buy the EV or the combustion vehicle. Use the broader ownership tool to examine the costs excluded from the simple comparison.

Test the purchase premium at different annual savings

This illustrative table holds the EV purchase premium at 5,000 currency units. Savings mean the difference in the specific annual running costs included in the comparison.

Use two separate views of cost

The comparison tool is useful for checking purchase outlay plus energy, service and insurance. For economic ownership cost, use purchase price minus expected resale value, then add financing interest and the other expenses. For cash flow, record the deposit, loan payment and running bills by month. A loan payment contains principal as well as interest; adding all of it to depreciation counts purchase capital twice. Keep both views available if affordability matters. Repeat the scenario with a less favourable resale assumption and your likely public-charging share. A break-even outside the intended ownership period is context, not a prediction or a purchase instruction.

Before you rely on the answer

• Does the stated total include resale or only purchase outlay?
• Have loan principal and depreciation been counted twice?
• Which local quote or assumption most strongly changes the result?

Worksheets and numerical scenarios are original EVVerity editorial examples. They are not observed vehicle results or market-price data.