Tax and Home EV Charging Reimbursement
A practical guide for fleets and payroll teams
This guide explains current HMRC guidance. It is not tax advice.
About this guide
Electric vehicle home charging reimbursement sits at the intersection of tax, payroll and energy policy. For company car electric vehicles, reimbursement of electricity used for business mileage can be made without creating a taxable benefit, provided it is structured correctlyunder HMRC guidance. On this page, we explore how electricity is treated for benefit in kind purposes, how the Advisory Electric Rate applies to company cars, where Approved Mileage Allowance Payments apply to employee owned vehicles, and what evidence employers need to support tax compliant reimbursement. This guide is for information only and does not constitute tax advice.
Electric vehicle charging at home represents a key approach to electrification of your fleet.
Is electricity treated as fuel for tax?
- No.
- HMRC does not treat electricity as fuel for benefit in kind fuelcharge purposes.
That means:
- Charging a company EV does not trigger the traditional fuelbenefit charge
- Reimbursing electricity for charging a company EV does notautomatically create a taxable benefit
This is a foundational difference from petrol and diesel companycars.
Can employers reimburse home charging taxfree?
Yes, in most structured scenarios where the right evidence is provided.
No.
- The vehicle is a company car
- The reimbursement relates to electricity used to charge that vehicle forbusiness use (business mileage needs tracked)
Then:
- Reimbursement can be made without creating a taxable benefit
The key requirement is that payments must relate specifically to EVcharging.
Which brings us neatly to data.
Why data and evidence matter whencompleting electric vehicle reimbursement
HMRC expects reimbursements to be:
- Justifiable
- Reasonable
- Consistent
You do not need to trace individual electrons. But you do need a defensible methodology.
Evidence can include:
- Smart charger data
- Vehicle telematics
- Energy tariffs
- Mileage logs
- Advisory rates
If challenged, the question is simple: "Can you explain how you calculated this?"
- If yes, you are in good territory.
Advisory Electric Rate (AER) explained forbusiness mile reimbursement
The Advisory Electric Rate is HMRC’s published safe harbour rate for reimbursing electricity used for business mileage in company electric cars.
It applies only to:
- Company cars
- Business miles
It does not apply to employee owned vehicles.
HMRC currently publishes two electric rates:
- A rate for drivers who can charge at home
- A rate for drivers who cannot charge at home and rely on public charging
The distinction is based on the driver’s charging access, not on tracing individual charging sessions orallocating specific kWh to specific journeys.
Employers should apply the rate that reflects the driver’s normal charging circumstances and use areasonable and consistent methodology.
AER provides payroll with a low risk, administratively simple route. However, it is a proxy rate and may notreflect actual electricity costs in every scenario. Often drivers feel out of pocket.
AMAP explained
There is no single best charger for all fleets. Different businesses prioritise different things such as cost, smart functionality, leasing compatibility or installation experience.
Approved Mileage Allowance Payments apply when:
The vehicle is employee owned
Rates are:
The vehicle is 45p per mile for first 10,000 miles
25p thereafter
This covers everything:
Energy
Depreciation
Insurance
Wear and tear
You do not separately reimburse electricity for employee owned vehicles.
AER and AMAP do not overlap.
Company car vs. employee owned: the decision point for reimbursement
Everything starts here.
Getting this wrong creates tax risk.
Getting it right simplifies everything else.
Actual cost vs. AER
Employers can reimburse:
At AER
At actual cost per kWh
If reimbursing above AER, you must be able to justify actual costs.
For home charging, actual cost requires:
Tariff awareness
Time of use logic
Accurate kWh allocation
This is where many policies fall apart without automation.
Alternatively you can reimburse above AER without evidence but anything above this is treated as income or a benefit in kind and should be grossed up (National Insurance and PAYE income tax needs to be accounted for).
Mixed charging and apportionment ofpersonal and business miles
EVs are charged:
At home
At public chargers
At workplaces
HMRC allows apportionment where business miles are powered by different sources.
But electrons cannot be traced to specific journeys.
What matters is:
A fair methodology
Consistent application
Sensible documentation
Over engineering this creates friction.
Under evidencing it creates risk.
This is where Paua operates.
Read about the different methods for home reimbursement here.
What about private mileage?
For company cars:
- Private electricity reimbursement does not trigger a fuel benefit but it isan additional benefit and needs managed as such
- But policies must still be clear
Some businesses operate:
- AER only reimbursement
- AER plus top up (with appropriate tax treatment)
- Reverse AER models (a higher cost to the business but powerful tomove drivers across to EV)
Each has different financial and behavioural impacts.
Tax is only one lens. Policy design is the other.
Payroll vs energy bill payment
Reimbursement can be made:
- Via payroll
- Direct to the driver
- As a payment to the energy bill
Each route has operational implications.
Payroll must be aligned with:
- Vehicle status
- Reimbursement method
- Evidence model
Clarity avoids messy P11D surprises and ensures that the tax treatmentis right so nothing unexpected lands with payroll at year end.
Proud Paua Customers
Common compliance risks
- Treating employee owned cars as company cars
- Paying above AER without evidence
- Ignoring tariff variation
- Applying public AER universally
- No documented methodology
Most problems arise from simplicity applied incorrectly.
What good looks like
A defensible home charging reimbursement policy should include:
- Clear vehicle classification
- Defined reimbursement method
- Evidence capture
- Consistent calculation engine
- Payroll alignment
- Documented rationale
When structured properly, home charging reimbursement is lowrisk and scalable.
Final thought on home EV reimbursement
EV reimbursement is not complex because of tax.
It becomes complex when:
Data is missing
Policy is unclear
Technology is fragmented
The right structure removes most of the anxiety.
Paua provides this through Paua Reimburse