How do public EV charging prices compare with home charging?

For most drivers, home charging costs less per mile than using a public charger. The difference comes from how the electricity is priced, rather than from the car itself. At home, you pay the rate on your electricity tariff. At a public charger, the operator sets a separate price and may add other charges.

Public charging prices usually depend on four things:

• The charger’s power: rapid and ultra-rapid chargers generally cost more than slower public chargers.
• The network and location: prices vary between operators and sites.
• How you pay: an operator’s app, a contactless bank card or a roaming service may show different terms.
• Time spent connected: some sites add an overstay or parking charge after a set period.

The price shown on a public charger is often stated per kilowatt-hour, but it may not be the only cost. A session fee, minimum charge, parking fee or idle-time charge can affect the final bill. Check the charger’s pricing before you start, particularly when using a network through a third-party app.

Home charging is easier to compare. Take the electricity used by the car and multiply it by the unit rate on your tariff. Allow for a small amount of energy lost while electricity passes through the charger and the car’s charging system. Your vehicle’s display or charging app may show how much energy it has taken.

For a fair comparison, compare the cost of adding the same amount of energy at home and in public. Looking only at how long each session takes can be misleading. A rapid charger may add range quickly, but the faster service is reflected in its price. A slower home charge can cost less while the car is parked overnight or during the day.

Your home tariff also affects the result. A standard tariff gives you a straightforward unit rate. A time-of-use or EV tariff may offer a lower rate during particular periods, but its conditions need checking. Some require a smart meter, and the cheap period may not suit every household’s routine. The relevant comparison is the rate that applies when you actually charge, not the cheapest rate advertised in isolation.

Do not add the whole household standing charge to every home charging session. You would normally pay that charge whether or not the car was plugged in. Include it only if you are comparing the total cost of changing tariffs specifically for the vehicle. Similarly, keep the cost of buying and installing a home charger separate from the electricity cost. Installation is an upfront property cost, while public and home charging prices are running costs.

A home charger can still be the practical choice when its installation cost has not yet been recovered through charging. The charger gives you a predictable place to charge and avoids detours, parking charges and uncertainty about public charger availability. If you already have suitable off-street parking and charge regularly, those practical benefits may matter as much as the unit rate.

Public charging remains useful when you cannot charge at home, are travelling beyond the car’s available range or need to continue a journey without a long stop. Destination chargers at hotels, workplaces and car parks can sit between home and rapid charging in both speed and price. The site’s own tariff determines whether they are good value.

Your driving pattern matters more than a single advertised price. A driver who charges most miles at home may use public chargers only occasionally. Someone without off-street parking may depend on public charging and should compare network prices, parking rules and access before choosing where to charge. If you use several networks, recording the full session cost for a few journeys gives a more useful comparison than comparing headline rates.

For a home charger, the electrical installation also affects the overall decision. The consumer unit, earthing arrangement, cable route and available supply all need checking before work starts. A property with an older electrical installation may need associated work before the charger can be connected safely. We assess those points as part of the quotation, so the electricity price is not separated from an installation that may need upgrading.

We carry out domestic EV charger installations as NICEIC- and ECA-approved electrical work. That means the charger, protective equipment and connection to the house are considered together rather than treated as a standalone appliance. The resulting comparison is clearer: home charging has a tariff cost and an installation cost, while public charging usually has a higher session price but no equipment to install at your property.

In short, home charging is generally the lower-cost option when you have suitable parking and a tariff that fits your charging routine. Public charging charges more for access, speed and convenience, but it remains valuable for longer journeys and homes where charging at the property is not practical.