How Much Does It Cost to Charge an EV at Home? UK 2026

The cost to charge an EV at home in the UK in 2026 lands somewhere between 3.49p and 27.7p per kWh, depending entirely on which tariff you're on. On the Ofgem default cap that took effect on 1 April 2026, electricity costs 27.7p/kWh (Direct Debit average) — so a 60kWh full charge from empty costs about £16.62. On a dedicated EV tariff like Intelligent Octopus Go, the same charge during the off-peak window costs £3.29 at 5.49p/kWh — roughly a fifth of the cap-rate figure (Ofgem, 25 February 2026; Octopus, March 2026).

This guide does the maths for the four most common UK EVs, breaks costs down to cost-per-mile, factors in the 5–10% charging losses that the headline figure ignores, and ends with a calculator-style decision matrix. By the end you'll know what your specific car, on your specific tariff, will actually cost you per month.

Every EV charging-cost calculation is the same formula:

Cost (£) = kWh added × price per kWh ÷ 100

Two numbers: how many kilowatt-hours you put into the car, and what each one costs you. Everything else is just a refinement of those two figures.

kWh added depends on three things: your car's usable battery capacity (smaller than the headline figure — typically 90–95% of the nominal pack), how empty the battery is, and the round-trip charging losses (5–10% on a 7kW home charger; see the losses section below). For a full charge from a typical 10% reserve, you're putting in roughly 0.85 × usable capacity worth of kWh from the grid.

Price per kWh is where the spread lives. The Ofgem default cap from 1 April 2026 sits at 27.7p/kWh for direct-debit customers. Off-peak rates on time-of-use EV tariffs run from 3.49p–14p/kWh depending on supplier and product. Public rapid chargers in 2026 average 79p/kWh — almost three times the cap rate (Zapmap, May 2026).

There are really only three relevant home-electricity prices for an EV driver in 2026:

The three home prices come from different tariff structures:

• Ofgem default cap — what you pay if you take no action. Direct-debit standard variable tariff, no smart-scheduling. Reset every three months by the regulator.
• Time-of-use EV tariff (Octopus Go, EDF GoElectric, E.ON Next Drive Smart, etc.) — a low rate during a fixed off-peak window, typically 4–7 hours overnight, plus a higher peak rate for the rest of the day. Requires a smart meter with half-hourly consent.
• Smart-scheduling EV tariff (Intelligent Octopus Go, OVO Charge Anytime) — the supplier (not your charger) controls when charging happens, slotting it into the cheapest grid half-hours. Requires a compatible car or charger.

For a deeper rate comparison across all eight major UK EV tariffs, see our Best EV Tariffs UK 2026 ranking.

Public charging in 2026 averages 54p/kWh at slow/fast and 79p/kWh at rapid/ultra-rapid (Zapmap, May 2026). Even at the slow tier, public is roughly double the home cap rate and 6× the average home EV-tariff rate. The maths only really starts working in your favour when you charge at home overnight on a time-of-use tariff.

Three policy and supplier changes hit on the same day — 1 April 2026 — and together they reset the whole UK home-charging cost picture:

• Ofgem default-tariff cap fell 6.6%, from £1,758/year to £1,641/year for a typical dual-fuel direct-debit household. Electricity unit rate moved from 27.69p/kWh (Jan–Mar) to 27.7p/kWh (Apr–Jun) — essentially flat at the headline level, but standing charges fell, and policy costs dropped £130 per direct-debit customer (Ofgem, 25 February 2026).
• The November 2025 Autumn Budget cut £150/year from a typical UK household's energy bill, comprising £62 from removing the Energy Company Obligation (ECO) scheme on 31 March 2026, and £92 from the government covering 75% of the Renewables Obligation for three years to March 2029 (HMT, 26 November 2025; MoneySavingExpert, 26 November 2025).
• Intelligent Octopus Go cut its off-peak rate by 39%, from 9p to a regional range of 3.49p–5.49p/kWh as of 1 April 2026. Octopus quoted off-peak rates falling roughly 3.5p/kWh across all 14 DNO regions, with some regions now under 4p (Octopus, March 2026).

For a 60kWh EV charged full once a week, the 39% IOG cut alone saves a household roughly £100–£180/year compared to the September 2025 IOG rate. The net effect across the cap and the IOG cut: charging an EV at home on the cheapest mainstream tariff in 2026 has never been cheaper in nominal terms.

What hasn't changed: public rapid charging is still expensive. Zapmap's May 2026 index has rapid/ultra-rapid at 79p/kWh, virtually unchanged from late 2025. The home/public spread is now larger than ever — a 14× ratio between the cheapest IOG region and a public ultra-rapid (Zapmap, May 2026).

Battery sizes and efficiency vary enough that a single "cost per charge" figure misleads. Here's the maths for four common UK EVs at three typical price points, assuming a charge from 10% to 100% (so 81% of usable capacity, plus 7.5% AC charging losses on a 7kW home charger).

The figures already include a 7.5% charging loss between the meter and the battery — a typical mid-range result on a 7kW AC home charger (InsideEVs summarises a documented 7kW session at 7.5%; real-world losses range 5–10% depending on temperature, battery state-of-charge, and onboard-charger efficiency).

If you're closer to a 5% loss (warmer ambient, mid-state-of-charge top-ups), figures are about 2.5% lower. If you're at 10% (very cold mornings, near-empty battery), they're 2.5% higher. The headline message doesn't change: the off-peak tariff turns a £15 bill into a £3 bill.

Full-from-empty is rare in practice — most UK drivers add 5–15kWh per night, not 50. Multiply the per-kWh column by your daily kWh need to size the bill for your usage.

Cost-per-mile is the figure that matters when comparing EV running costs to petrol. Use kWh consumed per mile (the inverse of mi/kWh) as the conversion.

Real-world UK efficiency figures from EV Database and manufacturer data, factoring in mixed driving:

• Tesla Model 3 LR — 5.0 mi/kWh real-world (4.4 in cold UK winter testing per Tesla UK)
• Tesla Model 3 RWD — 4.8 mi/kWh
• Kia Niro EV — 4.0 mi/kWh
• Renault 5 E-Tech — 4.3 mi/kWh
• VW ID.3 58kWh — 3.9 mi/kWh
• Mercedes EQE / EQS — 3.0–3.5 mi/kWh
• Porsche Taycan — 2.8–3.2 mi/kWh

Applied to the three home tariffs (with 7.5% charging losses included):

Compare to a petrol car at 50mpg with petrol at 145p/litre: roughly 13.2p/mile. Even on the Ofgem cap with no time-of-use tariff, a typical EV undercuts that by 30–55%. On a cheap off-peak tariff, the gap widens to 6–10×.

The car-by-car spread also matters. A heavy German EV at 3 mi/kWh on the Ofgem cap (9.3p/mile) costs nearly as much per mile as a 60mpg petrol diesel. Most of the EV running-cost advantage comes from the tariff, not the car — so anyone paying 27p/kWh on the standard cap is leaving most of the savings on the table.

Every kWh you pay for at the meter is not a kWh that ends up in the battery. The gap is charging losses — energy lost as heat in three places: the wallbox, the charging cable, and the car's onboard AC-to-DC converter.

For a typical 7kW home AC charger:

• 5–10% loss in normal conditions; on-board chargers run at 75–95% efficiency (InsideEVs, summary).
• Higher in cold weather — the battery uses some of the incoming energy to warm itself before accepting charge. UK winter losses can reach 12–15%, especially on near-empty packs.
• Higher at low charge rates — granny-cable charging at 2.3kW from a 3-pin plug can lose 15–20% because the car's onboard charger is least efficient at the bottom of its operating range.
• Lower at higher state of charge — losses fall as the pack warms up during the session.

DC rapid chargers bypass the onboard AC-to-DC converter (the rapid charger does the conversion off-vehicle), so DC-charging losses are typically lower in the car — though there's higher conductor heating. The combined grid-to-battery loss on DC is typically 6–10%.

What this means for your bill: add roughly 7–8% to the headline maths for AC home charging. The 60kWh "full charge" example earlier in this guide already factors this in (it pulls 65.3kWh from the grid to deliver 60kWh to the battery, 8.1% loss). If you're seeing closer to 15% on a granny cable, switching to a 7kW wallbox typically pays for itself within 2–3 years on charging-loss savings alone for a 10,000-mile/year driver.

Once you're plugged in at home, four levers move the bill more than anything else:

• Switch to a time-of-use EV tariff. This single change typically cuts charging cost by 65–80% versus the Ofgem cap. The eight mainstream UK EV tariffs are compared in our Best EV Tariffs UK 2026 guide — pick the one that matches your charger compatibility and overnight usage pattern.
• If your charger is on the Octopus compatibility list, use Intelligent Octopus Go. It hands scheduling control to the supplier so you charge in the cheapest half-hours of the 11:30pm–5:30am window. Compatible chargers include Ohme Home Pro, Wallbox, Hypervolt, and Indra (Octopus, 2026).
• Be aware of the March 2026 Charge Cap on IOG. Octopus now limits smart charging to 6 hours per 24h per household, regardless of how many EVs are connected. If you charge more than ~50kWh overnight (long commutes, multi-EV households, very large packs), check the cap before signing up — EDF GoElectric's longer 7-hour window may suit you better (Octopus, December 2025).
• Set a charge limit of 80% for daily charging. EV battery longevity studies consistently find that limiting charge to 80% (instead of 100%) on home charging extends pack life. It also means a smaller kWh draw each night, which fits inside a shorter off-peak window without overflow.

The Ofgem cap rate is reset every three months on 1 January, 1 April, 1 July, and 1 October. Suppliers publish updated tariff cards a fortnight before each reset. Setting a calendar reminder for these dates and recomparing tariffs takes 10 minutes and tracks the next 5–10% rate movement.

Five things that surprise people doing the home-charging maths for the first time:

• Regional rate variation on Octopus Go. Octopus sets IOG rates by 14 DNO regions. Hampshire and parts of the South East sit around 5.49p; Yorkshire and the North East sit closer to 4p; Scotland varies by sub-region (Octopus / Infinity Energy, March 2026). Always check your specific postcode's rate on the Octopus compatibility checker, not the figure quoted in a national headline.
• Standing charges erode the saving on light usage. Electricity standing charges on the April 2026 cap are 54.7p/day — about £200/year before you use any electricity at all. Light EV users (under 4,000 miles/year) sometimes find that the standing-charge difference between a standard cap tariff and an EV tariff swallows part of the off-peak saving. Run the maths against your last 12 months of usage before switching.
• The high-non-EV-usage trap. Every whole-home off-peak tariff has a peak rate well above the cap (24–31p/kWh). If your household uses more than 5,000kWh/year of non-EV electricity outside the off-peak window, the peak premium can erase the off-peak EV saving. Households with electric heating, heat pumps, or older appliances should run the figures particularly carefully.
• Granny-cable losses. A 3-pin 2.3kW "granny cable" loses 15–20% in charging — meaningfully more than a 7kW wallbox at 5–10%. On the Ofgem cap, the extra loss costs about £80–£120/year for a 10,000-mile-driver. The home charger buyer's guide covers when a wallbox upgrade pays back.
• App overlap conflicts. Smart-charging households end up running a supplier app, a charger app (e.g. Ohme, Hypervolt), and sometimes the car app — all of which can issue conflicting schedules. Pick one to be the schedule authority and turn the others off. Symptoms of conflict include the car charging at peak rates despite an off-peak schedule, or starting and stopping mid-session.