The real question: total cost of ownership
The sticker price of an electric vehicle (EV) is typically £5,000–15,000 higher than an equivalent petrol car. But the sticker price is only one part of the story. Over 3–5 years, fuel savings, lower maintenance costs, and (in some markets) tax incentives can make an EV significantly cheaper to own than a petrol equivalent. This guide breaks down every cost component with real 2026 numbers for both the UK and US.
Fuel costs: the biggest difference
United Kingdom
Petrol averages approximately 140–155p per litre in the UK as of early 2026. A typical family car (e.g., VW Golf) achieves 45–55 mpg (approximately 5.5L/100km). For 10,000 miles per year:
Petrol cost: 10,000 miles ÷ 50 mpg = 200 gallons × 4.55L/gallon = 910 litres × £1.47/litre = approximately £1,338/year
Electric equivalent (e.g., Volkswagen ID.3): approximately 3.5 miles per kWh. At the average UK home electricity rate of 24p/kWh (2026 Ofgem price cap estimate):
10,000 miles ÷ 3.5 miles/kWh = 2,857 kWh × £0.24 = approximately £686/year
Annual fuel saving: £652. Over 5 years: £3,260. Charging predominantly at home on an off-peak tariff (7p–10p/kWh overnight) reduces this to under £300/year.
United States
US petrol averages approximately $3.20–3.60/gallon nationally in 2026 (varies significantly by state — California $4.50+, Texas $2.80). A typical 30 mpg car driving 12,000 miles/year:
Petrol: 12,000 ÷ 30 = 400 gallons × $3.40 = $1,360/year
Electric (e.g., Tesla Model 3, Chevrolet Equinox EV) at 3.5 miles/kWh, average electricity 13 cents/kWh:
12,000 ÷ 3.5 = 3,429 kWh × $0.13 = $446/year
Annual fuel saving: $914. Over 5 years: $4,570.
Maintenance cost differences
Electric vehicles have dramatically fewer moving parts than petrol cars. No oil changes, no spark plugs, no timing belts, no exhaust systems. The main EV-specific maintenance items are tyre rotation (EVs are heavier, so tyres wear faster) and brake fluid replacement (though regenerative braking extends brake pad life significantly — some EV owners report 100,000+ miles on original brake pads).
Average annual maintenance costs:
- Petrol car: £700–900/year (UK) or $1,100–1,500/year (US)
- Electric car: £350–500/year (UK) or $600–900/year (US)
The maintenance saving over 5 years is approximately £2,000 UK / $2,500–3,000 US.
Purchase price and incentives (2026)
United States — Federal tax credit
The Inflation Reduction Act provides up to $7,500 in federal tax credit for new qualifying EVs purchased from US manufacturers. As of 2026, qualifying models include most Chevrolet, Ford, Tesla (some models), and Rivian vehicles. The credit applies at point of sale at participating dealers. Income limits: $150,000 (single) or $300,000 (married). Used EV credit: up to $4,000 for qualifying used vehicles under $25,000.
United Kingdom
The UK's Plug-in Car Grant was discontinued for cars in 2022, but EVs benefit from zero Vehicle Excise Duty (road tax) until 2025, then a flat rate from April 2025. Benefit-in-Kind tax for company car drivers is significantly lower for EVs (2% in 2024/25, rising gradually). The Salary Sacrifice scheme for EVs remains highly tax-efficient for employed drivers.
Break-even calculation
To find how long until an EV pays back its premium over a petrol equivalent:
Break-even = (EV price − Petrol car price − Tax credits) ÷ (Annual fuel saving + Annual maintenance saving)
Example (UK): £12,000 price premium − £0 grant = £12,000 ÷ (£652 fuel + £400 maintenance) = £12,000 ÷ £1,052 = 11.4 years
Example (US with $7,500 credit): $8,000 price premium − $7,500 credit = $500 premium ÷ ($914 fuel + $600 maintenance) = $500 ÷ $1,514 = 0.33 years
The US federal tax credit effectively eliminates the break-even period for many buyers. The UK calculation without a grant requires a longer ownership horizon — which is why leasing makes more financial sense for many UK EV drivers.
What about battery replacement?
Battery degradation is the most common EV concern. Most modern EV batteries retain 70–80% capacity after 150,000–200,000 miles. Manufacturer warranties typically cover the battery for 8 years or 100,000 miles. Actual replacement costs have fallen dramatically — from $15,000+ in 2018 to $5,000–10,000 for most vehicles in 2026, and continuing to decline. For the average driver keeping a car 5–7 years, battery replacement is not a realistic concern.
The verdict in 2026
For US buyers taking advantage of the federal tax credit, EVs are financially competitive with or superior to petrol equivalents over a 3–5 year ownership period for most buyers driving 10,000+ miles/year. For UK buyers without grant support, the financial case depends heavily on mileage (higher annual mileage shortens break-even significantly), access to home charging, and whether company car or salary sacrifice schemes apply.