EV vs ICE Maintenance Cost
Compare EV and petrol car maintenance costs over your ownership period.
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What this tool does
This calculator compares cumulative scheduled maintenance costs for an electric vehicle (EV) and an internal-combustion-engine (ICE) vehicle over a user-defined ownership period. It uses a simple linear model: the difference in annual maintenance costs, multiplied by years owned. Inputs are EV annual maintenance (£), ICE annual maintenance (£), and ownership duration (years); the output is the total saving (or extra cost) in pounds. The calculation assumes constant annual costs and does not account for major repairs, warranty coverage, or the battery-replacement cycle.
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How EV vs ICE Maintenance Cost works
This tool multiplies each vehicle's annual maintenance figure by the ownership term, then subtracts the EV total from the ICE total to show the net saving. If the result is positive, the EV costs less to maintain over the period; a negative result means the EV incurs higher scheduled-service expenses. The calculator also displays per-year gap and cumulative totals for both drivetrains.
The formula
Saving = (ICEannual − EVannual) × Years
Where ICEannual is the yearly service cost for the internal-combustion vehicle, EVannual is the electric-vehicle annual maintenance spend, and Years is the ownership duration. A positive saving indicates the EV is cheaper to maintain; a negative value indicates the EV costs more.
Where this method is most accurate
The linear assumption works best when annual maintenance remains stable—typical of routine services like brake-fluid changes, tyre rotations, and cabin-air filters. It does not capture age-related escalation (older vehicles may need more frequent repairs), the battery-replacement event many EVs face after 8–10 years, or warranty coverage that can zero out early costs. Real-world maintenance varies with driving style, climate, and manufacturer schedules.
What this tool does not do
It does not estimate insurance premiums, MOT fees, road tax, tyres, accident repairs, or battery-pack replacement costs. The calculator treats each year identically and cannot model deferred maintenance, goodwill repairs, or extended-warranty plans. It also omits the residual-value effect: lower running costs may boost resale price, offsetting part of any higher purchase premium.
Disclaimer
This calculator is an educational mathematics tool. It produces estimates based solely on the figures entered and does not constitute vehicle-purchase advice, financial guidance, or a guarantee of actual maintenance expenses. Real costs depend on make, model, mileage, driving conditions, and service-centre rates. Always consult manufacturer service schedules and obtain quotes from qualified technicians before making ownership decisions.
Questions
- Why do EVs typically cost less to maintain than petrol cars?
- Electric drivetrains have fewer moving parts—no oil changes, no exhaust system, no spark plugs, and regenerative braking reduces brake-pad wear. Many EVs require only brake-fluid checks, cabin filters, tyre rotations, and coolant top-ups during routine services.
- Does this calculator include battery replacement?
- No. The tool models recurring scheduled maintenance only. Battery-pack replacement is a one-time capital expense that typically occurs outside the standard service interval; users who expect a battery swap should add that cost separately.
- What should I enter for 'annual maintenance' figures?
- Use the sum of all scheduled services for a typical 12-month or 10,000-mile interval—oil, filters, inspections, brake fluid, and any manufacturer-recommended checks. Exclude insurance, road tax, MOT fees, tyres, and repairs not covered by a service plan.
- Can maintenance costs change over the ownership period?
- Yes. Older vehicles often need more frequent component replacements, and warranty coverage may reduce early costs to zero. This calculator assumes constant annual spending; for a more nuanced view, users can model different phases separately and sum the results.
- How does this saving compare to fuel-cost differences?
- Maintenance is only one part of total running costs. Electricity versus petrol expenses, depreciation, insurance, and purchase-price premiums all influence the economic case. Combining this calculator's output with a fuel-cost comparison provides a fuller picture.
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Sources & Methodology
The calculator subtracts the EV annual maintenance cost from the ICE annual maintenance cost, then multiplies the difference by the ownership period: Saving = (ICE_annual − EV_annual) × Years. This simple linear model is derived from standard cost-accounting practice for recurring operational expenses.
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