How can we improve WHMCS?

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Peppol integration

  • Hannes Deburchgraeve shared this idea 1 year ago
  • Payments/Billing
  • 26 Comments


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Peppol integration to send invoices on a secure way

https://peppol.org/
Merged Ideas
    Pepol integration the new european standard from 2026
    From 2026 we must use pepol to send the B2B invoices to the customersWil there be an future integration planned on the roadmap of WHMCS? In below you can find some links with extra information about pepol:https://www.vlaanderen.be/het-facilitair-bedrijf-overheidsopdrachten-en-raamcontracten/digitalisering-van-overheidsopdrachten/e-invoicing/peppol-mercurius-en-simplepriorhttps://peppol.com/blog/what-is-an-e-invoice/

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I've been following this thread with growing frustration, because I'm in the same boat: I run a hosting company on WHMCS myself.

I'm a Dutch developer and I've been building WHMCS integrations for my own company for years, so I'm seriously considering solving this for all of us instead of waiting any longer. The whole point would be that you get to stay on WHMCS: no switching billing software, no re-entering invoices in an external platform.

What I have in mind for v1:

- Sends invoices and credit notes as Peppol BIS 3.0 through a certified access point
- Triggers when the invoice is issued, not when it's paid (which is what the Belgian mandate actually requires)
- Recipient lookup before sending, with email fallback and a compliance warning if the customer isn't on Peppol yet
- Status dashboard with delivery/rejection status and retries
- No separate access point account or contract needed, document bundle included

And the good news: this won't take long for us to publish.

I did look at invoro since it was mentioned earlier in this thread, and to be fair it might work for some. But a few things made me decide it's not the answer for my own company: it's an external platform rather than a WHMCS module (their site lists WHMCS as "available" but I couldn't find an actual module or any integration docs), the company is very young (their own terms still reference their launch earlier this year), and at €39/month for 150 invoices the per-invoice price gets steep once you have any volume. What I want is something that lives inside WHMCS, fires automatically on invoice issue, and doesn't depend on forwarding emails to a third platform.

So: before I start, I want to know whether it's just the handful of us in this thread or a real market. If you'd want me to take care of this for you, fill in this 1-minute form: https://forms.cloud.microsoft/e/8RhWUwr4zS

Belgian hosts especially, since you're the ones with the deadline. Happy to answer questions here or, through my email at: [email protected] or in the form.
Please give a update on this. We are now forced to change software in the next 60 days as this is really time pressing right now.
Any update??? We are Q3, it was supposed to release in Q1...
On the other hand, we end up with a credit note system for payment which is neither desired nor legal in Belgium, France or Spain, it's complete nonsense.
Hi all,
Work to implement our e-invoicing solution with direct integration with the Peppol network (BIS Billing 3.0) is in progress.

We are currently in the final stages of polishing the integration and conducting rigorous testing. Given the critical importance of financial compliance, we are prioritizing stability to ensure the solution is robust upon release in Q1 2026.
Well, we are one week away from the deadline and no support for Peppol yet.
Will they also be late to apply the price increase ?
Do you have any updates on this?
Good and also bad news: WHMCS has confirmed that "Peppol BIS 3.0 / EN-16931 E-Invoices: Issue invoices and credit notes that comply with European e-invoicing mandates, ensuring acceptance across borders and in public sector transactions." will be added before the end of this year, along with a price increase effective January 1, 2026 :/
Hi,

Belgian company here. We're actively building an integration for WHMCS to be Peppol compliant via the Billit API before 2026.

Would anyone be interested if we commercialize this module for WHMCS so you can be compliant as well?

Kr
Jens
We (and several others) have a module running for over 6 months using the Billit API.
Hi all,
We are investigating the possibility of integrating a Peppol solution in WHMCS as an extension of our e-invoicing work: https://requests.whmcs.com/idea/add-electronic-invoicing

Implementing a Peppol solution is rather more involved than a standard e-invoice; requiring submitting invoice data to an accredited Peppol Access Point - whose service fees can be significant - and so choosing an appropriate Access Point with whom to partner is an additional consideration for us.

We will have more specifics and timelines to share in the next few months.
Is it possible WHMCS doesn't react about PEPPOL ?
I have finaly a solution i use accountingsoftware and export my WHMCS to Silvasoft, this handle the peppol!: https://netdistri.eu/whmcs-silvasoft
Thanks for the link. I will look into this solution. I still hope that WHMCS will wake up.
As other previously stated : very important for all EU Business and soon mandatory in Belgium.
It should be top priority, if not ready soon, all EU business will have to find alternatives.
Belgium is up first next year (only 6 months to go) and it's mandatory for sending invoices. I felt I should vote for this issue for the whmcs community friends in Belgium.

Maybe we can help by exploring some solutions. I came across billit.eu - according to their website, they offer a free API for sending invoices via Peppol. Do you guys have any other suggestions?
@Marlon - I think a lot of people in Belgium (and other european countries) are looking for a solution but WHMCS is not really responding while the time is tikking.
I don't think there is a real solution so far and WHMCS should have this ready a long time ago.

Billit, ING invoice manager, Doccle Pro, Lucy, Comanage, Moneybird, Dexter, .... allemaal alternatieven die geen echt alternatief zijn.
Our module has been running smoothly for several weeks on our own WHMCS installation and several others, integrated with Billit. It’s a great alternative solution while WHMCS hasn’t provided an official option yet. We’re happy to be legally compliant in the meantime. Feel free to reach out if you’re interested!
We've identified a potential solution using a third-party API and want to develop a WHMCS module to automatically send invoices to the Peppol network, primarily for Belgium-based businesses and potentially other European countries.
Which one ?