What is EV home charging reimbursement and how does it work?

Quick answer: EV home charging reimbursement is how businesses pay drivers back for electricity used to charge a company vehicle at home for business miles.

It sounds simple. In practice, it introduces new complexity around cost, data and fairness that most fleets are not used to managing.

What is EV home charging reimbursement?

EV home charging reimbursement is the process by which a business repays an employee for electricity used to charge a company vehicle at their home.

Unlike traditional fuel:

• The energy at home is purchased by the driver
• The cost appears on a personal energy bill
• The business does not directly see or control the transaction

Reimbursement bridges that gap.

It ensures that:

• The business pays for business use
• The driver is not left out of pocket

Why EV home charging reimbursement exists

With petrol and diesel vehicles, the process is straightforward:

• Fuel is bought using a company fuel card
• Or reimbursed using a mileage rate

With EVs, a large proportion of charging happens at home. This shifts the cost from the business to the employee unless it is reimbursed.

Without reimbursement:

• Drivers fund business travel themselves
• Cost tracking becomes inconsistent
• EV adoption slows

Reimbursement is not optional. It is a core part of running an electric fleet.

What costs are being reimbursed?

The cost being reimbursed is:

Electricity used to power the vehicle for business miles

This typically includes:

• Energy drawn from the home charger
• Charged at a domestic electricity rate
• Often influenced by time of day tariffs

It does not include:

• Energy used for private miles
• General household electricity

This distinction is critical for both fairness and compliance.

How EV home charging reimbursement works

At a high level, the process follows four steps.

1. The driver charges the vehicle at home

The driver plugs in their EV using:

• A dedicated home charger
• Or a domestic socket (3-pin)

The energy used is recorded through:

• The charger
• The vehicle telematics
• Or estimated via mileage

2. The cost of that energy is calculated

This can be done in different ways depending on the approach:

• Flat rate per mile (for example AER)
• Estimated energy usage
• Actual cost per kWh based on the driver’s tariff

The level of accuracy varies significantly between methods.

3. Business miles are identified

The business needs to determine:

• How much of the charging relates to business miles
• How much relates to private miles

This is typically based on:

• Mileage logs
• Telematics
• Driver input

4. The driver is reimbursed

Once calculated and approved (line manager approvals are important to avoid fraud & abuse):

• The business pays the driver
• Usually via payroll or expenses
• Or direct the energy bill when it is a pure business miles only driver

The aim is simple:
the driver should be no better or worse off for charging at home

The two main reimbursement approaches

Mileage based reimbursement

This uses a flat rate per mile.

How it works

• Driver records business miles
• Business pays a fixed rate per mile

Pros

• Simple
• Low admin

Cons

• Does not reflect real electricity cost
• Can under or over compensate

Energy based reimbursement

This uses the actual cost of electricity.

How it works

• Measure energy used
• Apply the driver’s tariff
• Reimburse the true cost

Pros

• More accurate
• Fairer
• Reflects real pricing

Cons

• Requires better data
• More complex to manage manually

Why EV home charging reimbursement is complex

On the surface, this is just paying back electricity. In reality, several variables interact:

Tariff variation

Drivers may be on:

• Fixed tariffs
• Variable tariffs
• Time of use tariffs

Prices can change by hour, not just by supplier.

Mixed use vehicles

Most company vehicles are used for:

• Business miles
• Private miles

Separating these accurately is essential.

Multiple vehicles and drivers

Some households may:

• Charge more than one EV
• Have more than one driver
• Mix company and private vehicles

Attribution becomes harder without structured data.

Data gaps

Not all chargers or vehicles provide:

• Accurate energy data
• Time stamped usage
• Vehicle level tracking

This forces fleets into estimation.

What happens if you get it wrong

Poor reimbursement processes lead to predictable issues:

• Drivers being out of pocket
• Disputes over payments
• Inconsistent finance records
• Increased admin burden
• Loss of trust

Over time, this slows EV adoption and increases operational friction.

What good EV home charging reimbursement looks like

A well designed approach is:

• Accurate
  Reflects real energy costs
• Fair
  Drivers are not disadvantaged
• Compliant
  Meets HMRC requirements
• Scalable
  Works as fleets grow

Achieving all four at once is the challenge.

How Paua Reimburse supports this

Paua Reimburse helps fleets manage home charging reimbursement as a system rather than a manual task.

It enables:

• Accurate calculation of home charging costs
• Support for different tariffs and driver types
• Separation of business and private miles
• Clear, auditable records
• Timely and consistent payments

This reduces complexity for finance teams and improves the experience for drivers.

The takeaway

EV home charging reimbursement is the mechanism that ensures drivers are paid back for business energy use.

• Drivers pay for electricity upfront
• Businesses reimburse business miles
• Accuracy depends on data and method
• Complexity increases as fleets scale

Understanding how it works is the first step to managing it properly.

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About Paua

‍Paua is a UK EV charging payment platform for fleets. We help businesses pay for electric vehicle charging across public networks, home charging and shared depots, giving fleet managers control over time, cost and data as they electrify.‍

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Read more about Paua Reimburse

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