EV Charging at Work: How to Bill Employees for the Electricity?

Charging electric vehicles on site has become common for companies, but an operational question quickly arises: who pays for the electricity consumed, and how can it be billed cleanly to employees or visitors? Between the company fleet, an employee's personal car and the visiting client, use cases keep multiplying and call for a real charging policy. Here is a practical guide to measuring consumption reliably, choosing the right billing model and avoiding legal blind spots.

Why billing back is becoming a key issue for companies

With one or two charge points reserved for executives, the cost question goes unnoticed. As soon as the fleet grows, charging electricity becomes a spending line in its own right, and several user profiles share the same charge points.

Three underlying trends explain why the topic is now reaching finance and HR departments:

• The rise of electric fleets, which multiplies the number of daily sessions and therefore the volume of kWh to track.
• Charging employees' personal vehicles at the workplace, perceived as an expected perk but one that is not neutral from an accounting standpoint.
• Opening up to visitors and clients, which turns the charge point into a hospitality service, sometimes free, sometimes billed.

Without a metering system, the company bears a diffuse expense that is impossible to break down by user or department. Conversely, well-thought-out supervision turns that expense into manageable data that can be billed back, reimbursed or built into the benefits policy.

The three main use cases to distinguish

Before talking about tools, you need to clarify who is charging and in what context. The billing logic is not the same depending on the profile.

Employees charging at the office

An employee plugs their personal vehicle into a company charge point during working hours. The energy consumed belongs to the company: it can decide to offer it, bill it, or treat it as a regulated benefit. This is the most sensitive case from a social-security and tax perspective.

Reimbursed home charging

The employee charges a company or service vehicle at home, on their own installation, and the company reimburses the electricity consumed for professional journeys. Here, the challenge is to precisely measure what counts as professional use and to reimburse the actual amount, with supporting documentation.

Charging for visitors and clients

The charge point becomes a hospitality service. The company can offer it free of charge as a goodwill gesture, or bill it via pay-per-session. The central technical need is then to identify the user and prevent a third party from consuming for free.

A single charge point can serve all three audiences. The key is not to multiply equipment, but to be able to tell each session apart by user and apply the right rule to each one.

How to measure consumption reliably

Billing back requires measuring, and measuring accurately. A flat-rate or rough estimate exposes the company to disputes and undermines any reimbursement. Three technical elements make measurement reliable.

The certified energy meter

A charge point intended for billing back must include reliable energy metering. To bill with full confidence, the preferred choice is a MID meter (Measuring Instruments Directive), that is, a meter compliant with the European directive on measuring instruments. This certification guarantees that the kWh displayed actually correspond to the energy delivered, an essential condition whenever an amount is billed or reimbursed on that basis.

User identification

To attribute each kWh to the right person, the charge point must know who is charging. Two common mechanisms:

• The RFID badge, assigned to a named user, which they present to start the session.
• The mobile app or QR code, which authenticates the user from their smartphone.

At each start-up, the session is linked to an identifier: employee, fleet vehicle or visiting guest. Without this step, it is impossible to break down consumption.

Exporting sessions by badge

A charge point managed via OCPP (Open Charge Point Protocol, the open standard for charge-point communication) reports each session to a supervision system. You get a detailed log: date, duration, energy consumed, user identifier. It is this exportable record that serves as the basis for any transparent billing.

Free, paid, or benefit-in-kind?

Once consumption is measured, the question remains of how to treat it. The company has three main options, each with different implications.

• Free of charge: the company covers the cost of the electricity. Simple to implement, but the benefit granted to the employee may, in some cases, be analysed as a perk. Supervision remains useful for tracking the overall cost.
• Billing: the user pays for the energy consumed, which requires a payment or internal billing system. This is the natural model for visitors and for personal use that the company does not wish to cover.
• Benefit-in-kind: when the company provides charging for a personal vehicle, the social-security and tax treatment depends on the applicable regulations and the specific situation.

On these tax and social-security points, caution is essential. The treatment of a benefit-in-kind, any URSSAF contributions and deductibility depend on your situation, the type of vehicle and the applicable regulations.

Before settling on your billing model, have the accounting and social-security treatment validated with your chartered accountant and, where applicable, with URSSAF. The rules evolve and are assessed on a case-by-case basis, according to the applicable scale.

The aim of this guide is to give you the reliable technical mechanics; the financial framing falls to your usual advisor.