Charging Company Cars at Home: Flat Rate or Precise Billing?Blog

Charging company cars at home: Flat-rate, manual or automated? This post helps businesses decide.

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BY Maike Eggengoor / ON Sep 08, 2025

Employees who charge their company cars at home must accurately report electricity consumption to their employer. The legally permitted flat rate is often insufficient. Precise billing requires technical equipment and reliable documentation. Companies and employees in Germany must decide which method is suitable: flat rate, manual, or automated.

Overview of the Three Billing Methods

Flat Rate Billing

The company pays a fixed monthly amount, regardless of actual electricity consumption. In Germany the amount depends on the vehicle type and whether charging is available at the workplace.

Vehicle TypeWorkplace ChargingMonthly Flat Rate
Electric CarNo€ 70
Electric CarYes€ 30
Plug-in HybridNo€ 35
Plug-in HybridYesE 15
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Advantages

  • Tax-free under § 3 No. 50 EStG

  • No measurement effort

  • Low administrative burden

Disadvantages

  • Lack of transparency

  • Actual electricity costs often higher

  • No control over charging behavior

Manual Billing Based on Consumption

Electricity consumption is recorded via a separate MID-certified meter . Employees regularly read the meter and submit the data for reimbursement.

Requirements

  • Meter exclusively records company car usage

  • Meter reading is always visible and accessible

  • No other consumers connected to the meter

Disadvantages

  • Prone to errors

  • High effort

  • Not legally compliant for shared charging setups

Automated Billing

Charging sessions are digitally recorded and transmitted directly to the company, e.g., via the Charge Repay Service.

Advantages

  • Convenient and audit-proof

  • Legally compliant even with multiple users

  • No manual documentation required

  • Separation of private and business charging via a web application

Technical Basis

  • MID meter with communication interface

  • Web application for management

  • Retrofit possible regardless of manufacturer

Technical Requirements for Accurate Billing

To ensure legally compliant billing, specific technical standards must be met. A legally compliant charging station or appropriate retrofit is required.

  • Compliant with MessEG and MessEV

  • Cryptographically secured measurement data

  • Interfaces to billing systems

  • Suitable for third-party billing

Alternative: The Charge Repay Service enables retrofitting of existing charging stations. The solution is manufacturer-independent.

Decision Support for Companies

MethodEffortLegal ComplianceCostRecommended For
Flat Rate BillingLowMediumLowSmall fleets, simple cases
Manual BillingHighLimitedLowIndividuals with separate meters
Automated BillingMediumHighMediumSMEs, multiple users, sustainability

Conclusion: Legally Compliant Billing with Minimal Effort

The appropriate billing method depends on various factors, including fleet size, technical setup, tax regulations, and usage behavior. Those looking to reduce effort while ensuring legal compliance will find a flexible solution in the Charge Repay Service. Retrofitting is also possible for existing charging stations.

FAQ

Frequently asked Questions

The flat-rate only covers an estimated average. For frequent use or longer distances, actual electricity costs are often significantly higher.
Only to a limited extent. It’s error-prone and not legally secure when the charging station is shared. A separate meter is required.
Yes, there are ways to retrofit existing wallboxes to make them legally compliant. One option is the Charge Repay Service, which enables legally compliant billing even when multiple vehicles are charged.
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Hello, my name is Anton Schönenberg, and I look forward to your inquiry!

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