Billing Integration for EV Chargers: A Guide for Company Car Fleets

Let’s be honest — no one gets excited about billing systems. But when your employees are charging company cars at their private residences, ignoring the reimbursement process is a recipe for a spreadsheet nightmare.

While many talk about EV charging at the office, the real logistical hurdle is often at home. This guide focuses specifically on the billing integration for EV chargers, managing billing for company cars parked in private driveways - ensuring cost allocation is compliant.

A billing system for EV charging consists of several components working together: the EV charger, metering, user identification, reporting tools, and, when needed, backend billing software for automation and reimbursement management.

Charging a company car at home quickly raises one key question: how much of the electricity bill is business-related? Without a proper system, the answer is usually guesswork.

A billing system for EV chargers solves this by providing clear, reliable data and removing manual effort. It’s necessary because:

• Accurate reimbursement – no estimates, only exact kWh-based costs

• Time savings – no manual tracking or spreadsheets

• Transparency – both employee and employer see the same data

• Compliance – proper documentation for accounting and tax purposes

Setting this up from the start avoids confusion later and ensures a simple, consistent reimbursement process.

Billing systems for EV chargers measure electricity usage per charging session, assign it to individual users, and transfer the data either manually or automatically for billing and reporting. This makes billing transparent and easy to manage.

Manual reporting is often sufficient for small fleets or occasional home charging. Automatic billing systems are usually the better choice for larger fleets, frequent charging, or companies that want to reduce administrative effort and enable scalable reimbursement processes. Consider that backend software usually involves ongoing costs per charging station or user.

You plug in overnight, feel productive, and then your electricity bill shows up looking… noticeably higher. Now comes the key question: how much of that is work-related?

With a smart wallbox, you don’t have to guess. It tracks every charging session separately and gives you clear reports. So instead of estimates and back-and-forth emails, you get straightforward reimbursement. Simple, transparent, done.

Legal requirements for billing EV charging depend on the country's regulations. But in most cases, accurate reimbursement requires reliable kWh measurement, user identification, and easy-to-handle reporting.

To find a suitable EV charging station billing system, look for:

• Smart energy meter 

• User authentication (e.g. RFID)

• Exportable reports for accounting

• Backend integration (e.g. OCPP support)

Making sure your hardware meets these standards from day one protects you from future legal disputes or tax audits.

A precise energy meter ensures that every charging session is measured accurately. It can be built into the EV charging station, installed separately, or, rarely, integrated into the vehicle. The meter determines how much electricity was actually used and, therefore, how much should be paid or reimbursed.

1. Integrated in the EV charging station (most common)

This is the standard solution today. The meter is built directly into the charging station, like our go-e Charger.

• Measures energy per charging session automatically

• Works with apps, RFID, and backend systems

• Ideal for wallbox billing for multiple users

This setup is the most convenient and is typically required for reliable billing of electricity for a company car.

2. Separate external energy meter

In some installations, especially in apartment buildings or older electrical setups, the meter is installed outside the charging station. 

• Mounted in the electrical cabinet or distribution board

• Can measure one or multiple charging points

• Often used in multi-tenant environments

This approach is practical when multiple chargers from different manufacturers need to be connected to one system.

3. Integrated in the vehicle

Technically, electric vehicles can measure how much energy they receive, but this data is usually not suitable for billing.

• Not standardised for reimbursement

• Often not legally compliant

• Limited accessibility for third-party systems

In this case, a driver can check their car app to see how much they were charged. However, this data cannot typically be used for official billing with an employer.

A billing software for EV chargers works best when it connects to software. With OCPP and backend systems, you can manage charging data easily, automate reimbursement, and scale without extra effort.

If you only have one employee charging at home, you might not need much software. But as soon as multiple employees or locations are involved, things get more complex.

OCPP (Open Charge Point Protocol) helps your charging station connect to different software systems. This means you’re not tied to one provider and can choose what works best for your company. A backend system collects all charging data and turns it into reports for reimbursement and accounting.

Top EV charging billing systems include the go-e Charger Gemini 2.0, with convenient data monitoring and control options, money-saving features, free portal, RFID management, and OCPP. Alternatively, VCHRGD Seven Pro offers dynamic control of the charging processes and easy manual data exports, while Zaptec Go impresses with its sleek design and smart features.

This wallbox integrates with nearly any backend, PV surplus, or load balancing system via interfaces like OCPP, Cloud and Local API, Modbus TCP, and MQTT. Compatible software solutions, including platforms from go-e integration partners, also support easy billing and reimbursement of charging sessions.

Key features:

• Native OCPP support

• Automated charging reports via backend & integration partners

• RFID management for separating private and business charging sessions

• Open interfaces including Cloud API, Local API, MQTT, and Modbus TCP

• Free app and go-e Portal access

It offers 7.4 kW charging, remote control via app connectivity, and dynamic tariff compatibility to help reduce charging costs. Offers secure RFID access, solar integration, and a compact weather-resistant design.

Key features:

• OCPP support

• Automated charging reports

• RFID user management

• Free app and online platform for remote control

Compatible with all electric vehicles, includes a built-in charging scheduler for off-peak energy savings, and, just like go-e, features a lockable charging socket for added security. Its compact, durable Norwegian-designed build is weather-resistant and future-proof.

Key features:

• OCPP support

• Automated charging reports

• RFID user management 

• Open interfaces

• Free app and portal access

An EV charging station with a billing system usually starts at around £700 and can go up to £2,000 or more, depending on the features and setup. Simpler models with fewer smart features and a lack of automatic billing and reporting options may be available at a lower price point, but in 99% of cases, choosing a more intelligent solution is the better option for cheaper and more efficient charging.

The combination of hardware reliability and software flexibility makes go-e Chargers a future-proof investment for any property.

What makes them particularly attractive for employers and employees:

• Suitable for both private and commercial use

• Simple to advanced billing options depending on setup

• RFID access for clear user assignment

• Reliable connectivity (WiFi, LAN, LTE)

• Open integration via OCPP and API

• Smart charging features for better cost control

A proper EV charging billing system — whether it's an 11 kW wallbox with a billing system or a larger setup — isn’t some “nice extra” anymore. It’s what keeps things from quietly turning into a mess.

A complete billing setup usually includes:

• A charging station with accurate metering

• User identification

• Reporting or backend software

• Optional billing automation

For small businesses or sole proprietors, manual exports and simpler reimbursement workflows may already be enough. For larger fleets or companies with multiple employees, automated backend systems significantly reduce administrative effort and improve transparency.