MID metering ensures accurate EV charging billing and legal compliance. Essential guide for businesses and property owners.

2. Staff Charging — Offices, Factories and Schools Many organisations have installed EV chargers for staff at their workplace a genuinely valuable benefit, particularly for employees who don't have access to home charging. Some organisations offer charging free of charge to staff, while others recover the cost by deducting it directly from employees' salaries. Where an employer is billing staff for charging, MID metering is clearly required undercurrent regulations. Looking ahead, even organisations offering free charging to employees will need to report usage to HMRC, as workplace charging is treated as a taxable benefit in kind. MID-certified meters will be essential for producing the accurate usage records that reporting requires. 3. Residential Environments — Apartment Blocks and Holiday Homes In apartment buildings where a management company bills residents for EVcharging, and in holiday rental properties where hosts charge guests, MIDmetering is a legal requirement. This is an area where compliance is stillwidely overlooked. What Does a MID Meter Actually Look Like? A MID meter is a small electronic measuring device. The technology inside is similar to the energy measurement electronics found in many EV chargers. The critical difference is that a MID meter's components have been independently tested and certified in an approved laboratory, guaranteeing their measurement accuracy under all conditions. MID meters can be installed as a separate unit within an EV charging post, or as is increasingly the case integrated directly inside the charger itself. At Simpson & Partners, our earlier Business Charger models were delivered with an optional MID meter installed within the plinth post. In 2026, our engineering team took this a step further: MID metering is now fully integrated inside our charger core modules across both our Business Plinth and Wallbox ranges, including models designed for the holiday park and hospitality sectors. ‍ ‍ Frequently Asked QuestionsAbout MID Metering What does MID stand for? MID stands for Measurement Instruments Directive. It's a European standard that ensures devices measuring electricity are accurate and trustworthy. After Brexit, the UK retained MID as part of its own Weights and Measures regulations, so it continues to apply throughout the UK. Is MID metering required bylaw in the UK? Yes. Under the 2016 Weights and Measures (Measuring Instruments) Regulations, reselling electricity: whether in homes, apartment buildings, workplaces, or through EV chargers, is illegal without MID approved metering. If you're billing anyone for the electricity they use to charge their vehicle, you must use a MID-certified meter. Do I need MID metering formy business? If you're billing customers, guests, staff, or residents for EV charging by the kilowatt-hour (kWh), then yes you legally need MID metering. This applies to: · Hotels and hospitality venues charging guests for EV charging · Shopping centres and leisure facilities billing customers · Workplaces deducting charging costs from employee salaries · Apartment buildings where management companies bill residents · Holiday lets where hosts chargeguests for electricity used Even if you're currently offering free charging to employees, you'll need MID metering to produce accurate usage records for HMRC reporting, as workplace charging is treated as a taxable benefit in kind. What happens if I charge for electricity without MID metering? Operating without MID-certified metering when billing for electricity is illegal under UK Weights and Measures regulations. This applies whether you're aware of the requirement or not. Beyond the legal risk, you're also exposing yourself to potential disputes with customers, guests, or residents who may question the accuracy of their billing. A MID meter provides legally defensible proof that your charging is accurate and fair. Can I add MID metering to my existing EV charger? It depends on your charger model. Some EV chargers can have a separate MID meter installed within the charging post or plinth. However, many older or basic chargers weren't designed with MID metering in mind, making retrofitting difficult or impossible. Simpson & Partners' latest Business and Holiday Series chargers have MID metering fully integrated inside the charger core from the factory, ensuring compliance from day one without any additional installation complexity. What's the difference between integrated and separate MID meters? A separate MID meter is installed as an additional component within an EV charging post or enclosure. It functions correctly but adds complexity to installation and servicing. An integrated MID meter is built directly into the charger's internal electronics during manufacturing. This is the modern approach used in Simpson & Partners' current range it's neater, more reliable and ensures every charger leaves the factory ready for legal, compliant billing. How do I know if a charger has MID metering? Look for "MID metering" or"MID-certified" in the product specifications. Reputable manufacturers will clearly state whether their chargers include MID metering as standard, as an option, or not at all. All Simpson & Partners Business Series and Holiday Series chargers include integrated MID metering as standard, it's not an optional extra. You can trust that you're getting a legally compliant solution from the start. Is MID metering the same as smart metering? No. Smart metering refers to the ability to remotely monitor and manage charging (often via an app or software platform). MID metering refers specifically to the certified, independent measurement of electricity for billing purposes. A charger can be "smart" without being MID-certified, which means it might offer fancy features but still leave you operating illegally if you're billing for charging. Conversely, a MID-certified charger ensures accurate, legal billing — and many modern MID chargers (including Simpson & Partners models) are also smart, giving you both compliance and convenience. Do I need MID metering if I'm not charging money for electricity? Currently, if you're offering completely free EV charging with no reimbursement or salary deduction, MID metering isn't strictly required. However, there are two important considerations: 1. Future-proofing: If you ever decide tostart billing for charging, you'll need MID metering. Installing it from thestart avoids costly upgrades later. 2. HMRC reporting: Workplace charging isa taxable benefit in kind. Even if you're not charging employees, you'll needaccurate usage records for tax reporting — and MID meters provide the legally defensible data HMRC requires. For these reasons, many forward-thinking organisations are installing MID-certified chargers regardless of their current billing model and futureproofing their investments. Where can I get EV chargerswith MID metering? Simpson & Partners offers a completerange of EV chargers with integrated MID metering: Business Series— For workplaces, car parks, and destination charging Holiday Series — Purpose-built for holidaylets and hospitality All include MID metering as standard, not as an optional extra. You get legal compliance, accurate billing, and peace of mind from day one.

More in News

Why We Built an EV Charger Specifically for Holiday Lets

The Business Series arrives

Premium EV charging just got more affordable for Blue Light Workers