Electric vs Petrol Running Costs UK: Which Is Cheaper in 2026?

The running cost gap between electric and petrol cars has narrowed and shifted in recent years. With electricity prices rising, petrol fluctuating, and new VED rules coming into effect from April 2025, the answer to 'which is cheaper?' isn't as simple as it used to be. This guide breaks down every major cost category — fuel, servicing, tax, insurance, and depreciation — with real UK numbers so you can make an informed choice based on your own driving habits.

Cost Per Mile: Electric vs Petrol

Cost per mile is the most direct comparison between the two powertrains. It depends on two variables: the price of energy and the efficiency of the vehicle.

Electric car cost per mile
Typical efficiency: 3.5 miles per kWh (real-world, mixed driving).
- Home charging at 7p/kWh (overnight EV tariff): 2.0p per mile
- Home charging at 28p/kWh (standard rate): 8.0p per mile
- Public rapid charging at 75p/kWh: 21.4p per mile
- Workplace charging (typical 20–30p/kWh): 5.7–8.6p per mile

Petrol car cost per mile
Typical efficiency: 40 mpg (real-world, mixed driving).
- Petrol at 145p/litre: 16.3p per mile
- Petrol at 155p/litre: 17.4p per mile
- Petrol at 165p/litre: 18.6p per mile

The headline takeaway: if you can charge at home on an overnight EV tariff (7p/kWh), you'll pay roughly one-eighth the fuel cost per mile compared to a petrol car. Even on a standard rate (28p/kWh), you're still paying about half. The economics only flip if you rely entirely on public rapid charging — at 75p/kWh, an EV costs more per mile than a 40 mpg petrol car.

Home Charging vs Public Charging vs Petrol Stations

Where and how you charge is the single biggest factor in EV running costs. The difference between the cheapest and most expensive ways to charge is roughly 10x — far wider than the price spread at petrol stations.

• Home charging (overnight EV tariff): 7–9p/kWh. Charging a 60 kWh battery (typical 200-mile EV) from 20% to 80% costs roughly £2.50–£3.20. This is the sweet spot of EV ownership and the main reason most owners report significantly lower fuel costs.
• Home charging (standard rate): 24–30p/kWh. The same charge costs roughly £8.60–£10.80. Still cheaper than petrol, but the gap narrows. Fixed-rate users save less than those on EV-specific tariffs.
• Workplace charging: Often 20–30p/kWh. Many employers offer subsidised rates or even free charging as a perk. If your workplace offers free charging, your effective fuel cost drops to zero for your commute.
• Public rapid charging (50–150 kW): 60–85p/kWh depending on network and location. A 20–80% charge costs roughly £21–£30 — comparable to or slightly more than filling a petrol car with the same real-world range. Rapid charging is the most expensive way to charge and eats into the EV cost advantage significantly.
• Petrol station pricing: Pump prices vary by roughly 10–15p/litre between supermarket and motorway services. At 40 mpg, this variation affects cost per mile by roughly 1.5p — meaningful but small compared to the 10–60p/kWh spread in EV charging.

Servicing and Maintenance

Fewer moving parts is the fundamental advantage of an electric powertrain. There's no engine oil, no timing belt, no exhaust system, no clutch, and far fewer components that can fail. This translates directly into lower service costs.

• Annual service costs: Independent data and manufacturer comparisons (Volkswagen, Renault) suggest EV servicing is typically 30–40% cheaper than an equivalent petrol model. A typical EV service might cost £100–£150 versus £150–£250 for a petrol car.
• No oil changes: Engine oil changes every 10,000–15,000 miles cost roughly £80–£150 per service. EVs have no engine oil to change, saving this recurring cost entirely.
• No timing belt or chain: Timing belt replacement on petrol engines is typically required every 60,000–100,000 miles and costs £300–£600. This cost does not exist on EVs.
• No clutch or gearbox wear: EVs have a single-speed gearbox with no clutch. There is no clutch replacement (typically £500–£1,000 on a petrol car) and no gearbox issues to worry about.
• Regenerative braking extends brake life: Because the electric motor handles most deceleration through regen, physical brake pads last much longer. Many EV owners report 50,000–100,000 miles before needing new pads, compared to 30,000–50,000 miles on a typical petrol car.
• What EVs still need: Tyre replacement (slightly more frequent on some EVs due to higher kerb weight), cabin air filters, brake fluid changes every 2 years, and air conditioning servicing. None of these are unique to EVs.

Vehicle Excise Duty (Road Tax)

One of the biggest changes in 2025 is that zero-emission vehicles are no longer exempt from VED. Here is how the rules now compare.

• EVs registered from April 2025: Pay the standard VED rate of £190/year (2025/26 rate), plus the £355/year Expensive Car Supplement (for cars over £40,000 list price) in years 2–6. This totals £545/year for the first 6 years for a £40k+ EV.
• EVs registered April 2017 – March 2025: Previously exempt, these now pay the standard £190/year rate from April 2025. No Expensive Car Supplement applies.
• EVs registered before April 2017: Fall into the old VED system — rates vary, but typically £0–£20/year depending on CO2 band.
• Petrol cars (2017 onwards): Standard rate of £190/year (most models). Expensive Car Supplement (£355/year for years 2–6) applies to cars over £40,000. Typical petrol family car: £190–£545/year depending on list price.
• Older petrol cars: Pre-2017 cars fall into the old banded system. A 2010 petrol car might pay £180–£325/year depending on CO2 emissions.

The VED advantage for EVs has narrowed significantly. Previously a £0 tax bill was a major selling point. Now, both EVs and petrol cars pay roughly the same standard rate. The main difference is that EV owners avoid the higher VED bands that affect high-emission petrol and diesel cars.

Insurance Costs

Insurance for EVs has historically been higher than equivalent petrol models, and that gap has not fully closed.

• EV insurance premiums: Typically 10–25% higher than an equivalent petrol car. A 2026 study by Comparethemarket found average EV insurance of £874/year versus £676/year for petrol cars — a difference of roughly £200/year.
• Why EVs cost more to insure: Higher repair costs (specialist EV-trained technicians, expensive battery repairs), higher parts costs, and higher vehicle value on average. However, some insurers now offer EV-specific policies with competitive rates.
• Petrol car insurance: Typically £600–£800/year for a mainstream family car. Lower repair costs and widespread availability of non-specialist mechanics keep premiums lower.
• How to reduce EV insurance costs: Compare specialist EV insurers, pay annually rather than monthly, increase voluntary excess, and install a home charger (some insurers offer small discounts). The gap is narrowing as more data on EV repair costs becomes available.

Depreciation

Depreciation is the single biggest cost of car ownership for most buyers — often exceeding fuel, tax, insurance, and servicing combined. The comparison between EVs and petrol cars here is nuanced.

• New EVs depreciate faster than new petrol cars: Rapid battery technology improvements and price cuts by manufacturers (notably Tesla) have caused some new EVs to lose 40–50% of their value in three years. A comparable petrol car might lose 30–40% over the same period.
• Used EVs offer incredible value: The flip side is that three-year-old EVs are increasingly affordable. A buyer looking for a used car gets dramatically lower running costs at a much lower purchase price — this is where the EV cost advantage is strongest today.
• Petrol cars depreciate more predictably: Established petrol models with good reliability reputations (Toyota Corolla, Honda Jazz, Volkswagen Golf) depreciate at a slower, more predictable rate. There's less risk of a sudden value drop due to battery concerns or technology shifts.
• Premium and desirable EVs hold value better: Porsche Taycan, Tesla Model Y, and the BMW i4 have shown stronger residual values than mass-market EVs. Brand cachet and desirability still matter.
• Long-term holding: If you plan to keep the car 8–10 years, depreciation matters less upfront. An EV kept for a decade can deliver massive fuel and servicing savings that outweigh the initial depreciation hit.

Congestion Charge, ULEZ, and City Incentives

For drivers in London and other UK cities with clean air zones, the savings can be significant.

• London Congestion Charge: Pure EVs are exempt from the £15/day Congestion Charge. If you drive into the zone 5 days a week, that's roughly £3,600/year saved versus a non-exempt petrol car. This alone can justify the switch for London commuters.
• ULEZ (Ultra Low Emission Zone): All pure EVs are automatically ULEZ-compliant with no daily charge. Most petrol cars registered after 2005 are also compliant, but older petrol models — and many diesels — face the £12.50/day charge.
• Other UK clean air zones: Birmingham, Bath, Portsmouth, and other cities have CAZs (Clean Air Zones) that typically exempt EVs. Check individual zone rules, but most treat pure EVs as zero-emission and charge nothing.
• Free or discounted parking: Several UK councils offer free or reduced-rate parking for EVs in on-street and car park spaces. These incentives vary by location but can add up to £200–£500/year in savings.

Company Car Tax (BIK)

If you're a company car driver or employer, the tax difference between electric and petrol is enormous.

• EV Benefit in Kind (BIK) rate: Just 2% for the 2025/26 tax year, rising to 3% in 2026/27. This means a £40,000 EV attracts a tax bill of roughly £240/year for a basic-rate taxpayer or £480/year for a higher-rate taxpayer.
• Petrol car BIK rate: Typically 25–30% depending on CO2 emissions. A £40,000 petrol car at 28% BIK costs roughly £2,240/year for a basic-rate taxpayer or £4,480/year for a higher-rate taxpayer. That's 5–10x more than an equivalent EV.
• Salary sacrifice schemes: Many employers now offer EV salary sacrifice schemes, where the car is paid from pre-tax salary. The combination of low BIK and salary sacrifice can make an EV significantly cheaper than a petrol car as a company vehicle.

Long-Term Ownership: 5-Year Cost Comparison

To bring everything together, here is a realistic 5-year cost comparison for a typical UK driver covering 10,000 miles per year. These figures are illustrative but based on current UK averages.

Electric car (home charging, overnight tariff):
Fuel (7p/kWh, 3.5 mi/kWh): £1,000
Servicing (5 years): £600
VED: £950 (5 years at £190)
Insurance: £4,370 (5 years at £874/yr)
Depreciation (new car, 50% over 5 years): £10,000 on a £20,000 car
Total 5-year cost: ~£16,920

Petrol car (40 mpg, 145p/litre):
Fuel: £8,150
Servicing (5 years): £1,000
VED: £950 (5 years at £190)
Insurance: £3,380 (5 years at £676/yr)
Depreciation (new car, 40% over 5 years): £8,000 on a £20,000 car
Total 5-year cost: ~£21,480

The EV saves roughly £4,500 over 5 years in this scenario. The savings come overwhelmingly from lower fuel costs (£7,150 less) and servicing (£400 less), partially offset by higher insurance (£990 more) and higher depreciation (£2,000 more). If you rely entirely on public rapid charging, the fuel savings shrink dramatically — at 75p/kWh, the EV fuel cost over 5 years would be roughly £10,700, making the petrol car cheaper overall.

Which Should You Choose?

The running cost answer depends heavily on where you charge and how many miles you drive.

• Choose an EV if: You have off-street parking for home charging (especially on an overnight EV tariff); you do 8,000+ miles per year (the fuel savings justify any price premium); you commute into London or other CAZ cities; you want a company car (massive BIK savings); or you plan to keep the car for 7+ years.
• Choose a petrol car if: You have no off-street parking and no reliable workplace charging (public charging alone erases most of the cost advantage); you drive less than 6,000 miles per year (the fuel savings won't offset the higher purchase price); you regularly need to cover 200+ miles without charging stops; or you want the cheapest possible upfront cost (entry-level petrol cars are still cheaper than entry-level EVs).
• Consider a plug-in hybrid (PHEV) if: You can charge at home but also need occasional long-range flexibility. Running costs sit between the two — short trips are near-EV cheap, long trips are petrol-cost. The trade-off is higher complexity and more things that can go wrong.

The honest answer for most UK drivers in 2026: if you can charge at home on an overnight tariff, an EV will almost certainly save you thousands over 5 years. If you cannot charge at home, the financial case is much weaker — and a modern efficient petrol car may be the more sensible choice for your wallet.