You invoice your own company.
You drive a company car and charge at home. Your company receives a note your accountant can book right away.
- No more spreadsheets
- No discussion during an audit
Expense note for home charging
Home charging, fairly reimbursed.
If you charge your company car at home, the reimbursement should match what it really costs you. WattsNote calculates with your own energy contract, the network charges and the capacity tariff, and draws up the note with the justification included.
96quarter hours calculated per day
1 dayis only ever on one note
€ 5per month per connection
Example
Expense note home chargingKV-2026-Q3-004 · 01/07/2026 to 30/09/2026
employer
logo
logo
Submitted bySarah Peeters
EAN 5414 … 0027
EAN 5414 … 0027
For the attention ofAtelier Vandamme bv
Mechelen
Mechelen
| Month | kWh | c€/kWh | Amount |
|---|---|---|---|
| July | 142,6 | 38,74 | € 55,24 |
| August | 118,3 | 38,91 | € 46,03 |
| September | 161,0 | 39,02 | € 62,82 |
| Amount due | 421,9 | € 164,09 |
7 attachments · method v1.2Made with
Your own energy contractYour grid operator's chargesCapacity tariff includedEvery session linked to a carSources with every note
What a flat rate misses
One price per kWh is right for almost nobody.
The CREG flat rate is an average across the whole region. Your charging costs what your connection costs, and that depends on four things that differ from home to home.
kW
Capacity tariff
Charging pushes up your monthly peak, and you pay for that peak for a year. The flat rate ignores it.
€/kWh
Your own contract
Fixed or variable, indexed on Belpex. We calculate with the formula of your contract.
EAN
Your grid operator
Network charges and levies differ per grid operator and per year. They come from the published tariffs.
meter
Your meter
Single rate, dual rate or digital with solar panels. The metering regime determines which tariff applies.
When prices move
The flat rate lags months behind. Your contract does not.
When electricity prices rise, whoever reimburses at the flat rate pays back too little for months. When someone changes contract or supplier, the flat rate never notices. WattsNote calculates every day with the price that actually applied that day.
De Tijd, 04/11/2026
“Het verschil kan op dit moment oplopen tot tientallen euro's per maand.”
According to De Tijd, the difference can currently run to tens of euros a month, because the flat rate follows the electricity price with months of delay. For a 60 kWh charge that is already more than 4 euros, and drivers who are underpaid leave their home charger unused and charge publicly instead. That usually costs the employer more.
CREG flat rate
The average of three months already past
Aug 2026Sep 2026Oct 2026→Jan to Mar 2027
The rate for the first quarter of 2027 is based on prices from August to October 2026. If prices rise in the meantime, the employee is underpaid. If they fall, overpaid.
WattsNote
The price of the day, from your own contract
01/02 to 13/02old contract
from 14/02new contract
New contract, different supplier or a price change mid-month: the calculation splits on that day. Each day gets the contract formula and index that applied then, with the source on the note.
The flat rate follows the rules of the tax authority and the figures of CREG. WattsNote shows it for comparison on every note, so you see the difference.
Flat rate or real cost
Sometimes higher, sometimes lower. Always right.
Whoever reimburses at a fixed rate knows the amount is wrong. With the real cost, the employer pays what charging actually cost, no more and no less.
Flat rate or split billing
WattsNote
Price per kWh
Regional average
Your contract, per day
Capacity tariff
Not included
Your real monthly peaks
Network charges
Averaged
Your grid operator
Charging card or extra meter
Often needed
Not needed
Justification
None
Sources, method, attachments
The same quarter, two outcomesExample · 421.9 kWh · Q3 2026
Here the flat rate misses the capacity tariff and the employee pays €28.15 out of pocket. With a cheap dynamic contract the opposite can happen, and the employer then pays less.
How it works
Set up once. Then a note whenever it suits you.
1
Record the connection
EAN, meter, energy contract, charger and car. A lease that already covers home charging is recognised.
2
Import sessions
Export your charger's sessions as CSV. Every session is linked to a badge, and so to a car.
3
Calculate per day
Index, network charges, levies and capacity of that day. Anything missing is flagged, never set to zero.
4
Note and delivery
A PDF with a summary and the calculation per month. Finalising assigns a number, freezes everything and sends the note to the employer's address.
At the start
We set everything up for you.
At the start we set up your connection once: your energy contract with the right start date, your grid operator and your charger. Is your charger not in the list yet? Send us a sample export and we will read it in. Then you can get going right away.
One-off onboarding fee €49, excluding VATOn the same note
Other expenses can come along.
Did you have other costs in the same period, such as charging on the road or a parking ticket? Add them with the receipt. They appear separately on the note, below home charging, and the receipt goes with the attachments.
Capacity tariff
One peak counts for twelve months.
Your grid operator does not charge on this month's peak, but on the average of your last twelve monthly peaks. Every month counts for at least 2.5 kW. Fast charging on a cold evening with the oven on is paid for during the whole year after.
≈ € 4,67is what one extra kW of peak in one month costs, spread over the twelve months after (2026 tariff).
Monthly peakFast charging on a cold eveningFloor 2.5 kWExample
The note
A note your accountant does not send back.
Your employer's logo at the top. Below it, everything an audit asks for.
A summary on page oneKilowatt hours, average price, the flat rate for comparison and the amount. Like a telecom invoice.
The price, broken down and sourcedEnergy, network charges, levies and capacity, each with the tariff card and the date it applied.
Attachments with a fingerprintEvery source document carries a hash. What is on the note cannot be changed afterwards.
Corrections as a differenceA finalised note never changes. A mistake becomes a new line, with the reason.
Straight into your accountsEvery note goes as a PDF and a UBL file to the address you choose, for example a shared mailbox or the import address of your accounting software.
For whom
From the self-employed to employers with their own fleet.
A few employees charge at home.
Everyone their own connection and contract, one policy for the company. You see the note, not the household's consumption.
- A numbering of your own
- Your logo at the top of every note
You get everything in one document.
Method, tariffs with source and date, sessions per month and the flat rate for comparison.
- Amounts excluding VAT
- Attachments with a fingerprint
Every employee makes their own note.
The same way, for everyone. Notes arrive automatically in your shared mailbox or accounting software.
- PDF and UBL per note
- Integration with your systems via API, on request
Price
Simple, per connection.
A one-off onboarding, then a fixed price per month. No charging card, no hardware, no margin on your electricity.
Onboarding
€ 49one-off
We set up your connection completely.
- Contract, grid operator and charger
- A new charger brand included
- Your first note reviewed together
Introductory price
€ 5per month
Per connection, during our launch phase.
- Unlimited notes
- PDF and UBL, with justification
- Delivery to the employer's mailbox
- Other expenses with receipt
All prices excluding VAT.
How is this different from split billing?
With split billing the employer usually pays a fixed rate per kWh, often through a charging card or an external service. WattsNote replaces that rate with the real cost of your connection. You do not change supplier and no extra meter is needed.
Which chargers are supported?
We import sessions through your charger's export. Is your brand not in the list yet? Send us a sample export at the start and we will read it in. What matters is that the charger links every session to a badge.
Can I add other expenses to the same note?
Yes. Charging on the road, a parking ticket or another cost from the same period is added with its receipt. Those lines appear separately from the calculated home charging, and the receipt goes with the note's attachments.
I have solar panels. How is that handled?
By default every charged kWh counts at the grid price. Whether that is mentioned on the note is your choice.
My lease already covers home charging.
Then that car's sessions are not reimbursed, so nothing is paid twice. For another car on the same connection it works as usual.
What if my contract or price changes?
You enter the new contract with the day it starts. From that day WattsNote calculates with the new formula, even mid-month or mid-quarter. With a variable contract the price follows the index every month, so an increase counts straight away and not months later.
Does the note reach our accounts automatically?
You give us an address, for example a shared mailbox or the import address of your accounting software. Every finalised note is sent there as a PDF and a UBL file. A direct integration with your own systems can be built on request through our API.
What if a mistake turns up later?
A finalised note never changes. A correction follows with only the difference, and the reason.
What does it cost?
A one-off onboarding fee of €49 per connection, then €5 per month, excluding VAT. For that we set up your connection completely, review your first note together, and you make as many notes as you like.
Start with WattsNote.
Request your onboarding. We get in touch, set up your connection, and then you make your notes whenever it suits you.
Request onboarding
€49 onboarding, then €5 per month. Excluding VAT.