In this article

Cheapest EVs to Run in 2026: Cost-per-Mile Ranking

Here is the single number that should reframe the whole "which EV is cheapest to run" question before you even start. The most efficient mainstream electric car you can buy in 2026, a Tesla Model 3 RWD, costs about 1.5p a mile to run on a smart overnight tariff. A petrol car, by comparison, costs 16-20p a mile just to fuel [6][29]. The least efficient EV on sale, a GMC Hummer EV, still comfortably beats that petrol car on energy when charged at home - and that is the twist this ranking is built around.

So yes, this is a cost-per-mile league table of the cheapest EVs to run, and the Model 3, Hyundai Ioniq 6, Lucid Air Pure and a clutch of small hatchbacks lead it [6][1]. But the data forces an uncomfortable headline for any "best car" list: where you charge changes your cost per mile far more than which EV you pick. The same Model 3 runs at 1.5p a mile on a 7p tariff and about 17p on a public rapid charger [18][29]. The spread between cars is real; the spread between tariffs is bigger.

What follows is the ranking, exactly how it's calculated, the efficiency data behind it, the charging-tariff lever that dominates everything, the thirsty end of the market, and how to get your own car to the bottom of the table. Every per-model efficiency figure is sourced; every cost-per-mile figure is our calculation from it. Read it as two answers in one: which EV to buy if running cost is your priority, and - more importantly - how to run whatever EV you buy as cheaply as the best car on the list.

The cheapest EVs to run in 2026, ranked

Ranked by energy cost per mile, the Tesla Model 3 RWD tops the table at about 1.5p a mile on a 7p off-peak tariff, with the Hyundai Ioniq 6, Lucid Air Pure, Mini Cooper E and a group of efficient hatchbacks close behind - all under 1.9p [6][1]. The table below uses real-world efficiency from EV Database, charged at 2026 UK rates; the cost-per-mile and annual columns are our calculation.

Cheapest EVs to run in 2026, ranked by energy cost per mile
RankModelEfficiency (mi/kWh)p/mile off-peak (7p)p/mile cap (26.11p)Annual (10k mi, off-peak)
1Tesla Model 3 RWD4.671.50p5.59p£150
2Hyundai Ioniq 6 RWD4.351.61p6.00p£161
3Lucid Air Pure RWD4.351.61p6.00p£161
4Mini Cooper E4.231.66p6.17p£166
5Dacia Spring4.231.66p6.17p£166
6Tesla Model Y RWD4.171.68p6.26p£168
7Renault 5 E-Tech4.041.73p6.46p£173
8Fiat 500e3.931.78p6.64p£178
9BYD Dolphin3.911.79p6.68p£179
10MG MG43.791.85p6.89p£185
Our calculation. Efficiency (miles per kWh) from EV Database real-world data [6]; US models from EPA [1]. Cost/mile = (1 / mi-per-kWh) x electricity rate. Off-peak = Intelligent Octopus Go 7p/kWh [20]; standard = Ofgem cap 26.11p/kWh, Jul-Sep 2026 [18]. Annual = cost/mile x 10,000 miles at the off-peak rate. Energy only - excludes insurance, tyres, depreciation.

Two things jump out. First, the absolute differences are small: the gap between first place and tenth is about 0.35p a mile, or roughly £35 a year at 10,000 miles - real, but not life-changing [6]. Second, the ranking is dominated by aerodynamic sedans and light hatchbacks: slippery shapes and modest weight beat tall, heavy bodies every time. The luxury Lucid Air Pure sitting near the top alongside a Dacia Spring is the giveaway - efficiency is about physics, not price [1][2]. Pick any car in this table and your energy cost is low; the differences between them are a tie-breaker, not the main event.

A note on why these specific cars lead. The Tesla Model 3 RWD has long been the efficiency benchmark because Tesla pairs a slippery body with a frugal rear motor and tight software control of energy use [1][6]. The Ioniq 6 rivals it through sheer aerodynamics - a 0.21 drag coefficient is exceptional for a family car [1]. The small hatchbacks - Renault 5, Fiat 500e, BYD Dolphin, MG4 - win on weight rather than aero, which is why they shine in town and slip slightly on the motorway [2][6]. And the Dacia Spring earns its place by being one of the lightest EVs on sale, proving that cheap and frugal can coexist [6]. There is no single recipe for efficiency; there are two - be slippery or be light - and the best cars do both.

How the ranking is calculated

The method is deliberately simple so you can reproduce it: take each car's real-world efficiency in miles per kWh, then multiply the inverse by your electricity rate. Cost per mile = (1 / miles-per-kWh) x price-per-kWh. A Model 3 at 4.67 mi/kWh on a 7p tariff is (1 / 4.67) x 7 = 1.5p a mile; the same car at the 26.11p cap is 5.6p [6][18][20].

Efficiency figures come from EV Database, which publishes real-world consumption corrected across a model's variants, so they're closer to what you'll see than optimistic lab numbers [6]. For US-only models such as the Lucid Air and the thirsty trucks, the figures are EPA miles per kWh [1][28]. The conversion from the European Wh/km metric is miles per kWh = 621.5 / (Wh/km) - so the Model 3's 133 Wh/km becomes 4.67 mi/kWh [6]. Every car in the table is sourced this way; only the cost arithmetic is ours, and it's labelled as such.

Efficiency: the new MPG

Miles per kWh is to an EV what miles per gallon was to a petrol car - the single number that decides how far each unit of energy takes you, and therefore your running cost [25]. The frugal end of the market clusters around 3.8-4.7 mi/kWh, with the Tesla Model 3 RWD leading at 4.67 and most efficient hatchbacks and sedans landing between 3.8 and 4.4 [6][1].

Energy efficiency of popular EVs (real-world, miles per kWh) (miles per kWh)
Tesla Model 3 RWD4.67Ioniq 6 / Lucid Air Pure4.35Mini Cooper E4.23Tesla Model Y RWD4.17Renault 5 E-Tech4.04Fiat 500e3.93MG43.79
Source: EV Database real-world consumption, converted [6]. Higher is cheaper to run.

Three design choices set that figure. Aerodynamics matter most at speed - the Ioniq 6's 0.21 drag coefficient is a big reason it rivals the Model 3 despite being larger [1]. Weight matters most in town, where every stop wastes energy a lighter car keeps - which is why small hatchbacks punch above their price [2]. And wheel size quietly costs you: the same car on 20-inch wheels can use noticeably more energy than on 18s, one reason the efficiency leaders are tested on smaller rims [1][2]. None of this is visible on a showroom sticker, but all of it lands on your electricity bill every month.

The bigger lever: where you charge

Now the finding that outranks the entire car list: your charging tariff changes cost per mile by more than 10x, while the best and worst efficient EVs differ by under 2x. The same Tesla Model 3 costs 1.5p a mile on a 7p off-peak tariff, 5.6p at the 26.11p price cap, about 11.6p on a standard public charger, and 16.9p on a public rapid [18][20][29]. The car never changed; only the electricity did.

Cost per mile to run a Tesla Model 3, by where you charge (2026) (pence per mile)
Home off-peak (7p)1.5Home standard cap (26.11p)5.6Public standard (54p)11.6Public rapid (79p)16.9Petrol equivalent17
Our calculation: Model 3 at 4.67 mi/kWh x 2026 UK rates [6][18][20][29]. Charging location dwarfs the car.

The reason is the structure of 2026 UK pricing. The Ofgem cap sits at 26.11p/kWh for July-September 2026, while smart EV tariffs such as Intelligent Octopus Go charge 7p/kWh in an overnight window - a 3.7x gap before you even reach public chargers [18][20][22]. Public charging is dearer still: the RAC's May 2026 Charge Watch put the weighted average at 54p/kWh on standard chargers and 79p on rapids [29]. So a driver with a home charger and a smart tariff pays a tenth of what a flat-dwelling driver reliant on rapids pays, in the identical car. If you take one thing from this ranking, make it this: secure off-peak home charging before you agonise over the model. The tariff is the bigger purchase decision.

There are middle options worth knowing, because not everyone has a driveway. Workplace charging, often free or subsidised, can rival a home off-peak tariff and is tax-free as a benefit in many countries [11]. Destination charging at supermarkets, gyms and car parks is sometimes free while you shop, effectively cutting your blended rate. And among public networks the spread is wide - subscription tariffs and slower AC posts undercut ad-hoc rapid rates substantially, so a public-reliant driver who plans around cheaper posts pays far less than one who only ever uses the dearest rapids [29][32]. The lesson isn't "home charging or nothing"; it's that your blended rate across all the places you plug in is the number that sets your cost per mile, and it rewards a little planning. A driver who mixes free workplace charging with occasional rapids can land near the home-charging cost without a driveway at all.

It's also worth flagging how the 2026 price cap rise sharpens all of this. With the cap up 13% from 1 July 2026, the gulf between a ~26p day rate and a 7p smart-tariff window is wider than it has ever been - which means the reward for arranging off-peak charging has grown, and the penalty for relying on the standard rate or public rapids has grown with it [18][20]. In a higher-price-cap world, the tariff decision matters more each year, not less.

Three drivers, one car: the cost that depends on you

To make the tariff point concrete, take a single Tesla Model 3 RWD and put three different drivers behind it for 10,000 miles a year - the running cost varies by more than £1,500 without changing the car at all. The driver, not the badge, sets the bill.

The home off-peak driver charges overnight on a 7p tariff and pays about 1.5p a mile - roughly £150 a year [6][20]. The standard-tariff driver has a home charger but sits on the 26.11p price cap, paying about 5.6p a mile, or £560 a year [18]. The public-reliant driver - typically a flat-dweller with no driveway - leans on rapid chargers at 79p/kWh and pays about 16.9p a mile, near £1,690 a year, barely undercutting petrol [29]. Same car, same mileage, a more-than-eleven-fold spread in cost per mile.

This is why the single most valuable thing you can do for your EV running cost is arrange off-peak home charging before you fixate on the model. A mid-table MG4 on a 7p tariff (£185 a year) costs less than a class-leading Model 3 on the price cap (£560), and a fraction of any efficient EV charged on public rapids [6][18][29]. The ranking tells you which car squeezes the most from each kWh; your charging setup decides what each kWh costs in the first place - and the second number swamps the first. Our home-versus-public piece digs into the gap in detail.

The thirsty end: what costs most to run

At the other extreme sit the electricity-guzzlers - heavy, powerful electric trucks and large performance SUVs that can use two to three times the energy per mile of an efficient sedan. The GMC Hummer EV manages just 1.48 mi/kWh and the Ford F-150 Lightning about 2.29, against the Model 3's 4.67 [28][34]. At 9,000-plus pounds, with nearly 3,000 of those in the battery alone, the Hummer needs a 212 kWh pack to go about as far as the Lightning does on 131 kWh [28].

Annual energy cost at 10,000 miles, home off-peak (cheap vs thirsty EVs) (GBP per year)
Tesla Model 3 RWD150MG4185Ford F-150 Lightning306GMC Hummer EV473
Our calculation at 7p/kWh off-peak [6][20][28]. The model matters - but less than the tariff.

But here is the point that keeps the whole thing in perspective: even a Hummer EV on a 7p off-peak tariff costs about 4.7p a mile to run - still cheaper than a petrol car's 16-20p [28][29]. The thirsty EVs are expensive relative to other EVs, not relative to petrol. Charged at home off-peak, a thirsty electric SUV at £473 a year still undercuts an efficient petrol car's fuel bill several times over [29]. So if you need a big EV, the energy cost is a reason to charge it smartly, not a reason to keep a combustion engine. The model decides how big your saving is; it rarely decides whether you save.

Cost per mile vs petrol

Against petrol, even the thirstiest EV wins on energy, and the efficient ones win by an order of magnitude. A typical petrol car costs 16-20p a mile to fuel at May 2026 prices - around 17.8p for a 40 mpg car at 157p/litre [29]. The cheapest EVs in this table run at 1.5-1.9p a mile on an off-peak tariff: roughly a tenth of the petrol cost, or about a third even at the standard price cap [6][18][29].

Put in annual terms at 10,000 miles, the most efficient EVs cost about £150-£185 a year to charge off-peak, against well over £1,700 to fuel an equivalent petrol car [6][29]. That energy saving is the single largest reason EVs are cheaper to run overall - large enough to absorb the higher tyre and insurance costs we've costed elsewhere and still come out ahead for most home-charging drivers. The catch, again, is the tariff: lose the off-peak rate and rely on public rapids, and an EV's per-mile cost can climb to roughly match petrol, erasing the advantage. Cheap-to-run is a charging strategy as much as a car.

It's worth being precise about the petrol comparison, because it's where the saving is most often overstated or understated. The 16-20p figure is fuel only, the fair like-for-like against an EV's energy cost [29]. A more efficient petrol car (50+ mpg) sits at the bottom of that band; a thirsty one or an urban-only car at the top. Diesel is broadly similar per mile, slightly cheaper for high-mileage motorway drivers. Against any of them, an EV charged off-peak wins decisively, and an EV charged at the price cap still wins comfortably; only an EV charged entirely on public rapids brings the contest close [18][29]. For the average UK driver covering 7,000-9,000 miles a year, the home-charged EV's fuel saving alone is several hundred pounds annually, before any of the other ownership costs are counted [8][11].

Winter: when the cheap car gets dearer

Every car in this ranking gets more expensive to run in winter, and the amount it climbs is itself a running-cost factor worth weighing. Cold weather hits efficiency two ways: the battery is less willing to give up and accept energy when cold, and cabin heating draws power that, in a petrol car, comes free from waste engine heat [3]. Real-world winter efficiency can fall 15-30% versus summer, so a 4.67 mi/kWh Model 3 might see closer to 3.5 in a hard freeze - pushing its off-peak cost from 1.5p toward 2p a mile [3].

The defence is the heat pump, which warms the cabin several times more efficiently than a resistance heater and so blunts the winter penalty - a reason to favour a heat-pump-equipped model if you live somewhere cold [3]. Preconditioning while plugged in matters even more: warming the cabin and battery on grid power before you unplug means the journey starts warm and spends its stored energy on driving, not heating [20]. The cars at the top of this table generally hold their efficiency advantage through winter, but the gap to a thirsty SUV narrows in the cold, and a driver who never preconditions can lose much of their tariff saving to the heater. Our winter-range piece quantifies the seasonal hit in full.

Small cars vs big cars: the size penalty

A consistent thread runs through the ranking: smaller, lighter, lower cars cost less to run, and the size penalty is large enough to outweigh badge or battery. A compact hatchback or aerodynamic sedan sips 3.8-4.7 mi/kWh; a tall family SUV on big wheels often manages 2.5-3.2; an electric pickup struggles below 2.3 [1][2][28]. The physics is unforgiving - frontal area and weight both fight you, and an SUV has more of each.

That matters because buyers often assume a bigger battery means cheaper running, when the opposite is usually true: a big-battery SUV carries more mass to haul and uses more energy per mile, so it costs more to run and more to charge to full, even though it goes further between charges [13][2]. If low running cost is the priority, the honest advice is to buy the smallest, most aerodynamic car that fits your life and resist the upsell to a larger battery you rarely need. A frugal supermini charged off-peak is close to the cheapest motoring available in 2026, electric or otherwise [6][9]. The size you choose is a running-cost decision dressed up as a practicality one.

Cheapest to run is not the same as cheapest to buy

The cars at the top of this energy ranking span a huge price range, so "cheapest to run" and "cheapest to buy" are different questions that buyers routinely conflate. The Lucid Air Pure is one of the most efficient cars here and one of the most expensive to purchase; the Dacia Spring is cheap to buy and cheap to run; the Model 3 sits in the affordable-premium middle [1][13]. Efficiency is set by engineering, not sticker price, so a low running cost can come at almost any budget [2].

For a buyer optimising total spend, the sweet spot is a car that is cheap to buy, efficient to run, and holds its value - which points toward established, efficient hatchbacks and sedans rather than either bargain unknowns that depreciate hard or thirsty flagships [13]. The 15-best-value lists overlap heavily with this efficiency table for exactly that reason: a frugal, sensibly-priced EV wins on the two costs that dominate ownership, energy and depreciation [13]. Use this ranking for the running-cost half of the decision, and a value or depreciation guide for the purchase half; the cheapest car to own is usually where the two lists intersect.

What makes an EV cheap to run

Beyond the headline efficiency number, a handful of design and usage factors decide where a given car lands - and most are things you can influence at purchase. Body shape and weight set the floor: a low, light sedan beats a tall, heavy SUV, full stop [1][2]. Wheel and tyre choice is the most overlooked lever - smaller wheels and efficiency-focused tyres can claw back several percent of energy, which is also why they're kinder on the tyre budget [2]. A heat pump cuts the winter penalty by warming the cabin far more efficiently than a resistance heater, protecting your cold-weather cost [3].

Battery size plays a subtler role. A smaller battery is cheaper to charge to full and lighter to haul around, so a frugal city EV can be cheaper to run than a long-range version of the same car, even though it needs charging more often [13]. And driving style matters as much on an EV as on a petrol car: gentle acceleration and anticipation let regeneration recover energy, while motorway speeds punish aerodynamics. None of these change the ranking's order much, but together they decide whether your real-world figure beats or misses the table.

One underrated factor is charging losses. Not every kWh you pay for reaches the battery - slow AC charging is typically 85-90% efficient, so your real cost per mile is a few percent above the simple efficiency-times-rate figure, and a touch worse on very cold nights [6]. It doesn't change the ranking, but it's why your home electricity meter shows slightly more than the car's trip computer claims you used. Budgeting a 10% buffer over the headline numbers in this table keeps your expectations honest, and it's another small reason to charge slowly overnight rather than blasting in rapid charge, which is both dearer per kWh and marginally less efficient.

Beyond energy: the full running-cost picture

Energy is the biggest controllable running cost, but it is not the whole bill - and the cheapest EV to charge is not automatically the cheapest to own. Tyres wear faster on EVs and cost more per corner, adding roughly 1-3p a mile depending on the car, which partly offsets the energy saving [the tyre figure is covered in our tyre-cost piece]. Insurance is often higher for EVs than petrol equivalents, and depreciation varies enormously by model and is usually the single largest cost of ownership [11][12]. Against those, maintenance is reliably lower, by roughly 40% per mile.

The honest synthesis: pick a car from the top of this table and you've minimised the energy line, which is the largest cost you control day to day - but then check its tyre appetite, insurance group and projected residual value before calling it the cheapest to own [11][13]. A frugal small hatchback that holds its value and sips tyres can be cheaper to own than a more efficient car that depreciates hard. Use this ranking to win the energy battle, and our other cost pieces to win the war.

Units
US$13.2A full charge at home0→100% of a 75 kWh battery at home. Public: US$35.25.
US$7.02Cost per 100 milesBlended home + public electricity.
US$58.5Electricity per month
US$702Electricity per yearUS$421 at home · US$281 public

Home electricity price: US$0.18 · Blended home + public electricity. US$0.23 per kWh

How we calculate this

Cost per 100 miles = EV efficiency × Home electricity price. Calculator

How to get your own EV to the bottom of the table

Most of the saving is in your hands, and it's mostly about charging, not driving. The biggest single move is a smart off-peak tariff with home charging - going from the 26.11p cap to a 7p window cuts your energy cost by nearly three-quarters on the identical car [18][20]. Set the car or charger to fill only in the cheap window, and let it heat the cabin on grid power before you unplug so the battery starts the journey warm [3][20].

After that, the levers are smaller but free. Choose the smaller wheel option when you configure the car - it helps efficiency and tyre cost together [2]. Use a heat pump model if you live somewhere cold, and precondition while plugged in to avoid spending battery on heating [3]. Drive for regeneration - anticipate, coast, brake gently - and keep tyres at the right pressure, which protects both range and rubber. Do all of this and even a mid-table EV will beat the headline figures here; ignore the tariff and rely on rapids, and the most efficient EV on the list will cost you more per mile than a thirsty one charged at home. The order of priority is clear: tariff first, charging access second, efficient model third. Get the first two right and the third becomes the pleasant tie-breaker this ranking is best used for.

Common questions

What is the cheapest EV to run in 2026? On energy per mile, the Tesla Model 3 RWD at about 1.5p on a 7p off-peak tariff, from a real-world 4.67 mi/kWh. The Ioniq 6, Lucid Air Pure, Mini Cooper E and Model Y RWD follow within 0.2p [6][1].

How much does an EV cost per mile? About 1.5-1.9p on a 7p off-peak EV tariff, 5.6-6.9p at the 26.11p price cap, and 11-17p on public charging [18][20][29].

Does the model or the tariff matter more? The tariff. The same Model 3 swings from 1.5p to 17p a mile depending on where you charge - a bigger range than between the most and least efficient mainstream EVs [18][29].

Are EVs cheaper to run than petrol? Yes, usually by a wide margin: 1.5-7p a mile at home versus 16-20p to fuel petrol. Even a thirsty electric SUV on an off-peak tariff beats petrol on fuel [29].

Which EVs cost the most to run? Heavy electric trucks and big SUVs - the GMC Hummer EV at 1.48 mi/kWh and Ford F-150 Lightning at 2.29 use two to three times the energy of an efficient sedan [28].

Is energy the whole story? No. Tyres, insurance and depreciation all add up, and maintenance subtracts. The cheapest car to charge isn't always the cheapest to own [11][13].

Sources

  1. Recharged - Most Efficient Electric Cars 2026: Top MPGe & Range Guide. https://recharged.com/articles/most-efficient-electric-cars-2026
  2. Recurrent - 2026 Most Efficient EV by Size According to Testing. https://www.recurrentauto.com/research/most-efficient-ev
  3. The Electric Car Scheme - The Most Efficient EVs For 2026. https://www.electriccarscheme.com/blog/what-are-the-most-efficient-electric-cars
  4. Cars.com - What Are the 10 Most Efficient Electric Cars? https://www.cars.com/articles/top-10-most-efficient-electric-cars-447501/
  5. EVspecs - Most Efficient Electric Cars. https://www.evspecs.org/most-efficient-electric-cars
  6. EV Database - Energy consumption of full electric vehicles cheatsheet (real-world Wh/km). https://ev-database.org/cheatsheet/energy-consumption-electric-car
  7. Autoblog - These Are the Most Efficient Electric Cars on Sale Today. https://www.autoblog.com/electric/these-are-the-most-efficient-electric-cars-on-sale-today
  8. Zego - Electric Car Running Costs in the UK: The Real 2026 Numbers. https://www.zego.com/blog/electric-car-running-costs-in-the-uk-the-real-2026-numbers/
  9. Brumble - How Much Does It Cost to Run an Electric Car UK 2026. https://brumble.co.uk/guides/electric-car-running-costs
  10. loveelectric - Best EV Tariff UK 2026: A Driver's Guide to Cheaper Home Charging. https://www.loveelectric.cars/blog/best-ev-tariff-uk
  11. The Electric Car Scheme - Electric Car Running Costs 2026. https://www.electriccarscheme.com/advice/salary-sacrifice-resource-hub/electric-car-running-costs
  12. CarCostCheck - Electric Car Running Costs UK (2026): The Real Numbers. https://www.carcostcheck.co.uk/blog/electric-car-running-costs-uk
  13. The Electric Car Scheme - 15 Best Value Electric Cars 2026. https://www.electriccarscheme.com/blog/best-value-electric-cars
  14. Sandicliffe - EV Charging Cost UK 2026. https://www.sandicliffe.co.uk/blog/how-much-does-it-cost-to-charge-an-electric-car-in-the-uk-in-2026
  15. Electric Drives - Are electric cars cheaper to run? A 2026 breakdown of UK EV ownership costs. https://electricdrives.tv/are-electric-cars-cheaper-to-run-a-2026-breakdown-of-uk-ev-ownership-costs/
  16. Select Car Leasing - Electric Car Charging Costs: UK Guide (2026). https://www.selectcarleasing.co.uk/hybrid-electric-cars/guides/cost-to-charge-electric-car
  17. The Home Energy Hub - Cost to Charge an Electric Car at Home UK (2026). https://www.thehomeenergyhub.co.uk/blog/how-much-charge-electric-car-home-uk
  18. Ofgem - Changes to energy price cap between 1 July and 30 September 2026 (26.11p/kWh). https://www.ofgem.gov.uk/news/changes-energy-price-cap-between-1-july-and-30-september-2026
  19. Ofgem - Energy price cap unit rates and standing charges. https://www.ofgem.gov.uk/information-consumers/energy-advice-households/energy-price-cap-unit-rates-and-standing-charges
  20. Octopus Energy - Intelligent Octopus Go (7p/kWh off-peak EV tariff). https://octopus.energy/smart/intelligent-octopus-go/
  21. EnergyPlus - Octopus EV Tariff 2026: Intelligent Octopus Go 7p Compared. https://www.energyplus.co.uk/octopus-ev-tariff
  22. Energy-Stats UK - Intelligent Octopus Go Rates 2026. https://energy-stats.uk/intelligent-octopus-go/
  23. Octopus Energy - Best Tariffs For Electric Cars. https://octopus.energy/ev-tariffs/
  24. Carwow - Most Efficient Electric Cars of 2026. https://www.carwow.co.uk/electric-cars/efficient
  25. Select Car Leasing - Miles per kWh: the new MPG for electric cars. https://www.selectcarleasing.co.uk/hybrid-electric-cars/guides/miles-per-kwh
  26. Wikipedia - Electric car EPA fuel economy (MPGe / kWh per 100 mi). https://en.wikipedia.org/wiki/Electric_car_EPA_fuel_economy
  27. Edmunds - Tested: Electric Car Range and Consumption (EPA vs Edmunds). https://www.edmunds.com/car-news/electric-car-range-and-consumption-epa-vs-edmunds.html
  28. Battery Tech Online - These Are the 8 Worst Electric Vehicles for Efficiency (Hummer EV 1.48 mi/kWh, F-150 Lightning 2.29). https://www.batterytechonline.com/market-analysis/these-are-the-8-worst-electric-vehicles-for-efficiency
  29. RAC - EV public charging costs / Charge Watch (54p standard, 79p rapid; petrol 16-20p/mile, May 2026). https://www.rac.co.uk/drive/electric-cars/charging/electric-car-public-charging-costs-rac-charge-watch/
  30. Zapmap - UK EV charging price index: average cost per kWh. https://www.zapmap.com/ev-stats/charging-price-index
  31. Which? - How much does it cost to charge an electric car? https://www.which.co.uk/reviews/new-and-used-cars/article/electric-car-charging-guide/how-much-does-it-cost-to-charge-an-electric-car-a8f4g1o7JzXj
  32. The Charge Scheme - Public EV Charging Costs 2026: A Price Comparison Guide. https://www.chargescheme.com/blog/cost-to-charge-ev-public-charger-uk-2026
  33. Tom's Guide - I tested more than 40 EVs this year: most and least efficient. https://www.tomsguide.com/vehicle-tech/evs/i-tested-more-than-40-evs-this-year-heres-the-top-5-most-efficient-models-and-3-worst
  34. The Drive - The GMC Hummer EV is So Inefficient It Makes Other Electric Trucks Look Thrifty. https://www.thedrive.com/news/the-gmc-hummer-ev-is-so-inefficient-it-makes-other-electric-trucks-look-thrifty

Methodology & sourcing

Scope. This ranks popular electric cars by what they cost to run per mile in 2026, defined as energy cost only - the figure most under your control. It does not rank purchase price, depreciation, insurance, tyres or maintenance, which are covered in our other pieces and netted together at the end. Models are chosen for relevance to UK and European buyers across price classes.

Efficiency data. Real-world consumption (Wh/km, converted to miles per kWh) comes from EV Database's energy-consumption cheatsheet, which corrects for multiple versions of a model [6]. US-market figures (Lucid Air, the thirsty trucks) use EPA miles-per-kWh from efficiency rankings [1][2][28]. Conversion: miles per kWh = 621.5 / (Wh/km). All per-model efficiency is sourced; the cost-per-mile and annual figures built from it are our calculation.

Price data. Home off-peak uses the Intelligent Octopus Go EV rate of 7p/kWh (23:30-05:30) [20][21]; standard home uses the Ofgem price-cap unit rate of 26.11p/kWh for 1 July-30 September 2026 [18]; public uses the RAC/Zapmap May 2026 weighted averages of 54p/kWh (standard) and 79p/kWh (rapid) [29]. Petrol comparison uses 16-20p per mile at May 2026 pump prices [29]. Annual figures assume 10,000 miles/year.

Honest framing. The headline finding is that where you charge moves cost per mile far more than which EV you buy - a deliberately uncomfortable conclusion for a "best car" ranking, and one the data forces. Every figure carries a source number or the "our calculation" label.