Cheapest EV tariff in 2026 depends on your charging window

On 1 April 2026 the government raised the maximum electric vehicle chargepoint grant from £350 to £500 per socket, and most people reading this cannot claim a penny of it. According to GOV.UK’s guidance on the changes, the grant is open to renters, flat owners, landlords and households with on-street parking. Own a house with a driveway and you get nothing, which has been true since the old Electric Vehicle Homecharge Scheme shut to homeowners. The bigger number for your household sits on the tariff side, and it is not the headline rate. The cheap overnight windows suppliers hand out are different lengths. British Gas gives five hours on EV Power, EDF gives seven on GoElectric. At 7.4kW those two extra hours are worth about 15 kWh a night, near enough 49 miles of driving, and no p/kWh comparison table shows it.

What actually changed on 1 April 2026

The Department for Transport reset the chargepoint grant schemes on that date. GOV.UK’s guidance on the changes confirms three things happened at once.

• The maximum grant rose from £350 to £500 per socket for residents and landlords, with state-funded education institutions able to claim up to £2,000 per socket.
• Five schemes were extended for a final year to 31 March 2027: the flats and renters grant, the residential landlord chargepoint grant, the on-street parking households grant, the Workplace Charging Scheme, and the Workplace Charging Scheme for state-funded education.
• Three schemes closed to new customer applications on 31 March 2026: the staff and fleets grant, the commercial landlord chargepoint grant, and the residential landlord infrastructure grant.

The grant is 75% of the cost to buy and install a socket, capped at £500. It is not a cheque. Your installer claims it and takes it off the invoice, so a £999 install is billed to you at £499, rather than you paying the full £999 and claiming £500 back afterwards. GOV.UK also states that the government reserves the right to end or change the remaining schemes and says it aims to provide four weeks’ notice if it does. Treat 31 March 2027 as an outside limit rather than a plan.

The tariff side of the reset is where the household money sits. Ofgem’s price cap for 1 July to 30 September 2026 puts electricity at 26.11p/kWh with a 57.19p daily standing charge for direct debit customers, a 13% rise on the quarter for a typical dual-fuel household. Against that, EDF’s GoElectric tariff charges 6.99p/kWh between 11pm and 6am. That gap decides your running cost. The difference between one charger brand and another does not.

Why the length of your cheap window matters as much as the rate

A 7.4kW single-phase home charger delivers roughly 7.4 kWh of energy for every hour it runs. Multiply that by the hours your supplier gives you at the off-peak rate and you get the ceiling on what you can put into the car in one night at the cheap price. Anything the car still needs after the window shuts gets bought at the day rate.

Here is what the mainstream window lengths deliver. These are illustrative calculations at a nominal 7.4kW, and they assume the charger runs at full output for the whole window. In practice the battery receives a little less than the charger delivers, because AC to DC conversion in the car loses some energy, and a cold battery in January will accept charge more slowly than a warm one in July. The cost column holds the rate constant at 6.99p so you can see what window length alone is worth.

The 3.3 miles per kWh figure is not invented. Data from Zapmap imply it: the site converts 79p/kWh rapid charging into 24p per mile, which only works at 3.3 miles per kWh. A large SUV will do worse and a small hatchback better, so adjust for your car.

The practical consequence is this. If you drive 40 miles a day, any of these windows covers you and the headline rate is all that matters. If you regularly arrive home near empty in a 70 kWh car, five hours physically cannot refill it overnight and you will finish the job at the day rate. Two hours of extra window is worth more to that household than 1p off the off-peak rate.

The overnight EV tariffs you can check today

Rates move, so this table is a snapshot taken on 21 July 2026 from each supplier’s own pages. Check the tariff information label before you switch.

Why the cheapest rate depends on where you live

None of those numbers is a flat national price in the way a table implies. Octopus’s own EV tariffs page states that energy rates change by region and sends you to a postcode checker before you sign. E.ON prices Next Drive the same way and footnotes its comparison figures as an average across all 14 distribution regions. The independent tariff tracker energy-stats.uk puts the Intelligent Octopus Go overnight rate at around 7.5p/kWh and its daytime rate at around 32p/kWh, and states plainly that both vary by region and move with wholesale costs.

The ranking above can therefore reverse on your postcode. A tariff sitting third here may be first where you live, and the supplier quoting the lowest published figure may not be cheapest for you. Use the table as a shortlist to price up with your own postcode, not as a league table.

What each tariff needs before it will work

Every one of these needs a smart meter that the supplier can read remotely, in half-hourly mode. EDF quotes two to four weeks for a smart meter install after you join, then two to three days for the tariff itself to go live. If your meter is a first-generation SMETS1 unit that lost communication after a supplier switch, sort that out before you plan anything else.

Intelligent Octopus Go adds a second gate that blocks more households than the meter does. Octopus’s EV tariffs page states you need a compatible car or charger, and says the tariff supports over 280 cars plus selected chargers. Octopus schedules the charge itself, so if your car is not on that list and your charger is not a supported model, you cannot have the tariff at all. E.ON applies the same condition to Next Drive Smart. Its plain Next Drive tariff, along with British Gas EV Power, runs on a fixed window instead, so any charger on a timer will do.

The Intelligent Octopus Go six-hour allowance and who it will bite

Octopus announced on 7 May 2026 that Intelligent Octopus Go is moving to a four-rate structure with a daily allowance for the car. The company’s blog sets out the mechanics: up to six hours of off-peak car charging per day, measured midday to midday, on the stated basis that over 80% of charging sessions take less than six hours. A charge cap stops the session before it runs into the expensive peak rate. The home off-peak window stays at 23:30 to 05:30.

For most households this changes nothing, and Octopus’s own 80% figure says so. The households it will affect are the ones outside that 80%:

• Anyone with a large battery who runs it low regularly. A 77 kWh pack from near empty needs about 10.4 hours at 7.4kW, so it will span two allowances or spill into a dearer rate.
• Two-EV households sharing one charger, where the combined nightly demand exceeds six hours of charging on a single meter.
• Drivers who top up in the afternoon and then again overnight, because the midday-to-midday accounting means an afternoon session eats into the same day’s allowance.

If you are in one of those groups, EDF’s seven-hour window with no daily cap is worth checking against the 8p headline rate. If you plug in with 40% left and drive normal mileage, the allowance will never touch you.

An illustrative calculation for a 7,000-mile year

This is a worked example, not a customer. Assumptions stated up front: 7,000 miles a year, 3.3 miles per kWh, all charging done at home unless stated, no allowance for standing charges because you pay one whichever tariff you are on. That mileage needs about 2,120 kWh a year.

The public charging rates are Zapmap’s weighted average pay-as-you-go prices for June 2026, both up about 4% year on year. Zapmap’s June figures also show how wide the spread is inside the public network. Across the top ten rapid networks, which account for around 64% of all rapid and ultra-rapid chargers in the UK, prices ran from 61p/kWh on Tesla Superchargers during the day to 92p/kWh at InstaVolt, with Believ at 66p, Sainsbury’s Smart Charge at 72p and Fastned at 79p.

Two conclusions fall out of that table. First, moving from the price cap to a decent overnight tariff saves roughly £406 a year on 7,000 miles, which pays back a £999 installed charger in about two and a half years. Second, if you are currently doing all your charging on rapid chargers, the same £999 pays for itself in well under a year. Note also how small the gap is between the best and worst overnight tariffs here: £138 against £191 is £53 a year. Getting onto any overnight tariff matters far more than picking the perfect one.

Part of the home-versus-public gap is tax rather than electricity: domestic supply carries 5% VAT and public charging carries 20%. Do not budget on that changing. Charge My Street won a First-Tier Tribunal appeal in February 2026 arguing that public charging should attract the 5% reduced rate under the de minimis provisions for small-scale electricity supplies. HMRC confirmed in April 2026 that it will appeal, so 20% still applies at the pump.

Check the day rate before you switch

Here is the failure mode nobody advertises. An EV tariff buys you a cheap night by charging you more for the day. The comparison site BestChargers, in a July 2026 review, puts EV-tariff daytime rates typically between 21p and 37p/kWh. The tariff tracker energy-stats.uk puts the Intelligent Octopus Go daytime rate at around 32p/kWh. The Ofgem cap for the same quarter is 26.11p/kWh. Some EV tariffs therefore charge above cap during the day, which is legal because the cap applies to standard variable tariffs rather than fixed EV products. Neither of those two sites is a regulator, so use them as a prompt to check rather than as figures to rely on. The number you want is on the supplier’s own tariff information label, and you are entitled to see it before you sign.

Do the whole-house sum, not the car sum. Take your annual electricity consumption from your last statement, subtract the kWh you expect to move into the off-peak window, and price the remainder at the tariff’s day rate. If you cannot find a recent statement, our Energy Bill Estimator will give you a baseline annual kWh figure for your property type to work from.

The households that should be most careful here are the ones with heavy daytime load: anyone working from home five days a week, anyone running a heat pump, and anyone with electric hot water on a daytime schedule. A heat pump household can easily lose more on the day rate than the car saves overnight. If your car needs 2,120 kWh a year and your house needs 3,500 kWh, the day rate is doing most of the work in your bill. This is also the case for a car-only bolt-on like OVO Charge Anytime, where 14p/kWh on the car leaves the rest of the house untouched by any peak-rate penalty.

Who can get the £500 grant, and who gets nothing

The Electric Vehicle Chargepoint Grant for renters and flat owners is available across England, Wales, Scotland and Northern Ireland. The Channel Islands and Isle of Man are excluded. To qualify you must own and live in a flat, or rent any residential property including shared ownership, and you must have private off-street parking at the property. You also need an eligible electric vehicle from the OZEV-approved list, and you must use an OZEV-authorised installer.

The Find a grant page rules you out if any of these apply:

• You own a house rather than a flat. This is the big one, and it catches the majority of people searching for the grant.
• You have already had the chargepoint installed. The application has to come first.
• You have already claimed this grant or one of its predecessors, including the Electric Vehicle Homecharge Scheme or the Domestic Recharge Scheme.
• You are moving house or planning to move. This one catches people who apply while a sale is going through.
• You are a lodger in someone else’s home, or you rent from a live-in landlord.
• Your building already faces a mandatory chargepoint installation requirement.

The closing date is 31 March 2027 at midnight. Uptake tells you something about how the schemes are working in practice. Government statistics from the DfT, published on 1 April 2026, record 24,759 sockets funded under the renters and flat owners scheme, worth £8.6m. Across all schemes since 2013, 410,081 home installations have been funded, 11,762 of them in the preceding twelve months.

No driveway, and why only 48 sockets have been funded for cross-pavement charging

The on-street parking grant looks like the answer for terraced streets. It is also 75% up to £500, and it requires you to have no access to private off-street parking. The DfT statistics show 48 sockets funded under it as of 1 April 2026, at a total of £16,681. Set that against 24,759 sockets under the flats and renters scheme and you can see it is barely being used.

The conditions are demanding. The grant pays for a permanent cross-pavement solution, typically a channel or gully set into the footway so the cable runs below the walking surface. Rubber cable covers and mats laid on top of a cable are explicitly excluded. You then need two separate permissions before anyone digs: consent from your local highways authority for the cross-pavement infrastructure, and planning permission from your local planning authority. The same page also rules out anyone moving house, anyone who already has a chargepoint and wants a new one, and anyone wanting to move an existing chargepoint to a new property. The closing date is 31 March 2027 at 11:00pm.

DfT publishes the socket count but no explanation for it, so nobody has established publicly why take-up sits at 48. What that number does tell you is that your council may never have processed one of these applications before, so allow time.

If you are on a terraced street with no driveway, start with your council’s highways team before you spend anything. Ask whether they will consent to a cross-pavement channel and what their approval timescale is. If the answer is no, the grant is unreachable and your realistic options are a workplace charger, a nearby lamppost or on-street unit, or supermarket charging while you shop at standard-speed rates rather than rapid ones. Zapmap’s June 2026 average for standard and standard-plus public charging is 54p/kWh against 79p on rapid, so choosing the slower unit while parked anyway saves around 8p a mile.

What a home charger costs installed in 2026

Fixed-price bundles from the volume installers are the benchmark. Pod Point lists its Solo 3S at £999 untethered or £1,049 tethered, up to 7.4kW, including standard installation. Pod Point states that about 90% of its customers qualify for the included standard install, assessed by a pre-installation survey.

That last sentence is doing a lot of work. The survey is where a fixed price becomes a quote. Common reasons a job leaves the standard bracket are a long cable run from the consumer unit to the parking space, a consumer unit with no spare way or an old rewireable fuse board, drilling through a solid stone or rendered wall, or an earthing arrangement that needs additional protection. None of those is exotic. If you have a 1930s semi with the meter in a cupboard under the stairs and you park at the far end of a 15-metre driveway, expect a supplement.

One cross-check on that £999. EDF’s Pod Point Plug & Power tariff bundles the same Solo 3S, and EDF prices it at £499 upfront against the £999 RRP, with the balance spread across the two-year tariff. The charger is not thrown in free. Against buying outright, the bundle asks £500 less at the door in exchange for a two-year lock-in, and its 0.5p/kWh advantage over GoElectric is worth about £11 a year on 2,120 kWh. The hardware terms are what you are actually choosing between there, not the rate.

The electrical checks that turn a fixed price into a quote

Three technical issues account for most of the surprises.

Your main fuse rating. A great many homeowners believe they have a 100A supply because the fuse carrier is marked 100A. The carrier rating and the fuse inside it are different things, and the fuse may well be 60A or 80A. Only your distribution network operator can confirm and change it. What matters is total household load rather than the number on the box.

DNO notification. Installer guidance from ProEV, which is a trade source rather than a government one, describes the practical threshold this way: where total load stays under about 13.8 kVA, roughly 60A, the installer can notify the DNO within 28 days of the installation and the job proceeds on the day. Above that, an application has to be approved before work starts, and the typical wait is 10 to 20 working days. If the main fuse needs upgrading as well, that becomes two to eight weeks. Notify-after generally applies where a single charger draws 7.4kW or less on a supply rated 80A or more. Confirm your own position with your DNO rather than relying on that summary, because thresholds and processes differ by region. In Northern Ireland there is a single network operator, NIE Networks, so the process differs from the fourteen regional DNOs covering Great Britain.

PME earthing. Most UK homes use a PME, or TN-C-S, earthing arrangement, and BS 7671 Regulation 722.411.4.1 does not permit it for an outdoor chargepoint without additional protection. The IET’s guidance lists five acceptable routes: a balanced three-phase installation; an additional earth electrode at the main earthing terminal; a device that disconnects line, neutral and protective earth if the protective-conductor-to-Earth voltage exceeds 70V; a device that disconnects if the supply voltage exceeds 253V or falls below 207V rms; or an equivalent safety device. In practice most modern chargers include open-PEN detection that satisfies the voltage-limit option, which removes the need for an earth rod. If your installer proposes digging an earth electrode, ask why the charger’s built-in protection is not being used, because the answer affects both cost and ground disturbance.

What the regulations force your charger to do

The Electric Vehicles (Smart Charge Points) Regulations 2021 apply to every domestic charger sold in Great Britain. Two provisions catch people out.

First, chargers ship with default charging hours that must fall outside peak hours, and the regulations define peak hours as 8am to 11am on weekdays and 4pm to 10pm on weekdays. Several installer and manufacturer guides state that the morning peak covers weekends. It does not. The regulations say weekdays in both cases.

Second, chargers must be capable of a randomised delay of up to 1,800 seconds and must operate with a randomised delay of up to 600 seconds at relevant times. That is why your car sometimes sits for several minutes after the window opens without drawing power. It exists to stop hundreds of thousands of cars starting together at 11:30pm and shocking the grid. You can accept, remove or modify the default settings at first use and at any time afterwards, so if the delay is eating into a short window, change it.

Approved Document S sets the minimum specification for chargers in new residential buildings in England: a minimum nominal rated output of 7kW, a universal untethered socket, Mode 3 on a dedicated circuit to BS EN IEC 61851-1, and compliance with BS 7671. A new residential building with associated parking must have a chargepoint for each dwelling with a space. That standard is worth borrowing even for a retrofit, because an untethered socket outlives any one car’s connector.

Approved Document S also carries a £3,600 figure that gets quoted badly. It is a cap on grid connection cost for new-build developers, and it has nothing to do with what an installer charges you to fit a charger on an existing house. Paragraph 1.5 defines the connection cost as the extra cost of the incoming electrical supply per chargepoint connection compared with the cost without chargepoints. Paragraph 1.7 requires at least two formal quotes before a developer can rely on it, one of which must come from a distribution network operator. If a retrofit quote cites £3,600 as some kind of official ceiling, that is a misreading of the document.

Where you live changes the rules

The grant schemes are UK-wide, covering England, Wales, Scotland and Northern Ireland, with the Channel Islands and Isle of Man excluded. The tariffs are not. EDF, Octopus, E.ON, British Gas and OVO all sell into Great Britain only. Northern Ireland has a separate electricity market with its own suppliers, and the Ofgem price cap does not apply there, so the 26.11p comparison figure used throughout this guide is a Great Britain number. Approved Document S is an England document, and Wales, Scotland and Northern Ireland publish their own building standards. BS 7671 covers the whole UK, so the PME rules above hold everywhere.

Five ways people lose money on this

1. Buying the charger before choosing the tariff. Hardware differences are worth tens of pounds a year. The tariff is worth around £406 a year against the price cap on 7,000 miles, and roughly eleven times the running cost against public rapid charging. Pick the tariff, then buy a charger that works with it.
2. Comparing off-peak rates without comparing windows. British Gas EV Power gives five hours at 9p, which is 37 kWh at 7.4kW. EDF GoElectric gives seven hours at 6.99p, which is 51.8 kWh. If your car needs more than the shorter window holds, the balance gets bought at a day rate several times higher and the headline rate stops mattering.
3. Ignoring the day rate. With EV-tariff daytime rates commonly sitting either side of the 26.11p cap, a household with high daytime consumption can lose on the whole-house bill while winning on the car.
4. Assuming the grant applies. Owner-occupiers of houses have not been eligible for years, and 1 April 2026 did not change that. Guides still quoting £350 are also out of date; the figure is £500.
5. Ordering a charger without checking the main fuse. A DNO application adds 10 to 20 working days, and a fuse upgrade can add two to eight weeks. Ask your installer to check before you take delivery of the car.

What to do, and by when

The order that saves the most money is not the order most people follow.

1. This week. Check whether you have a smart meter and whether your supplier can actually read it in half-hourly mode. Every EV tariff depends on it, and fixing a non-communicating meter takes two to four weeks.
2. Before you compare tariffs. Work out your real nightly energy need. Take your daily mileage, divide by your car’s miles per kWh, and compare that against what each window delivers at 7.4kW: 37 kWh over five hours, 44.4 kWh over six, 51.8 kWh over seven. If you need more than 37 kWh on a normal night, rule out the five-hour tariffs before you look at any rate.
3. Before you shortlist. Check whether your car and charger are on the supported list for any smart tariff you are considering. Intelligent Octopus Go and E.ON Next Drive Smart both schedule the charge themselves and will not take you without a compatible car or charger. Fixed-window tariffs from EDF, British Gas and E.ON’s plain Next Drive have no such requirement.
4. Before you switch. Ask for the tariff information label and read the day rate, the standing charge and the exit fee, priced for your own postcode. EDF’s GoElectric carries a £75 exit fee on its one-year fix and the Pod Point bundle locks you in for two years at £499 upfront for the charger.
5. Before you order hardware. Ask the installer to check your main fuse rating with the DNO and to confirm whether the job is notify-after or application-first. Get the earthing solution named in writing.
6. If you rent or own a flat, by autumn 2026. The £500 grant closes on 31 March 2027, and GOV.UK says the government reserves the right to end it sooner on about four weeks’ notice. Applications have to be submitted before installation, so leaving it until spring 2027 risks missing it entirely.
7. If you have no off-street parking. Contact your council’s highways team first and ask whether they will consent to a cross-pavement channel. Only 48 sockets nationally have been funded under that grant, so expect to be one of the first applications your council has handled.

One honest caveat on all of the above. Every rate in this guide is dated: the Ofgem cap figures apply to 1 July to 30 September 2026, the public charging averages are Zapmap’s for June 2026, and the tariff rates were taken from supplier pages on 21 July 2026. Several of those rates vary by distribution region, so the figure on your own quote will differ from the published headline. Suppliers reprice, and Octopus’s allowance change was announced in May 2026 and is still rolling out. Re-check the numbers against the supplier’s own page, with your postcode entered, before you commit to a two-year fix.