E-INVOICING API LUXEMBOURG

Luxembourg was one of the first countries to fully embrace Peppol for public sector invoicing. B2G is fully mandatory, B2B is next.

Whether you are invoicing the government today or preparing for the B2B mandate on the horizon, Dokapi gives you the infrastructure to do it right.

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UNDERSTANDING THE MANDATE

WHAT THE LUXEMBOURG
MANDATE MEANS

Luxembourg is making electronic invoicing mandatory for domestic B2B transactions. Every taxable business established in Luxembourg will have to receive and issue e-invoices. The obligation rolls out in three steps.

E-invoicing

Domestic B2B invoices must be issued, transmitted and received as structured electronic documents, exchanged over the Peppol network, paper and plain PDF no longer qualify.
Domestic e-invoicing B2G is already mandated.

Who is affected

Every taxable business established in Luxembourg, whatever its size. Only the deadline to issue differs by company size, the obligation to receive applies to all from day one.

Luxembourg e-invoicing TIMELINE

Three mandatory milestones. Here is what applies to whom, and when.

STEP 1 · MANDATORY RECEPTION

1 January 2028

All businesses must be able to receive

All taxable businesses established in Luxembourg must be able to receive structured electronic invoices.

STEP 2 · ISSUANCE, PHASE 1

1 July 2028

Large & medium-sized must issue

Large and medium-sized enterprises must issue structured e-invoices for domestic B2B transactions.

STEP 3 · ISSUANCE, PHASE 2

1 January 2029

All remaining businesses must issue

The issuance mandate extends to all remaining businesses, including small enterprises, micro-enterprises and sole traders.

Who counts as large & mid-sized?

Large or medium-sized enterprises

Under Luxembourg's Draft Law No. 8815, a large or medium-sized enterprise is defined as any business that exceeds at least two of the following three thresholds evaluated at the end of the 2026 financial year:

Annual Turnover: More than EUR 15 million.
Balance Sheet Total: More than EUR 7.5 million.
Average Workforce: More than 50 full-time equivalent employees (FTE)

Electronic invoices will be transmitted between partners with, at first, no transmission of data to Luxembourg Tax Authority. To exchange E-Invoices and anticipate ViDA, Luxembourg aims to adopt a decentralized Peppol 4-corner model as its national interoperability standard, building on its existing public sector infrastructure. All issued e-invoices will have to comply with the EN 16931 European Standard.

The API engine behind 70+ million documents per year

LUXEMBOURG ESSENTIALS

Everything the Luxembourg mandate asks of your platform, handled through a single API integration. Here is exactly what that covers.

01 - NETWORK

Peppol registration

Your Luxembourg VAT or RCS identifier is registered on Peppol, making you discoverable and exchange-ready across the network from day one.

02 - DIRECTORY

Participant lookup

We resolve recipient routing on your behalf, so every document reaches the right access point without you maintaining any address book.

03 - CONVERSION

Incoming documents to UBL

If needed our system converts Inbound CII to the UBL your systems already understand, one format to integrate, whatever your partners send.

04 - COMPLIANCE

Validation

Every document is validated against the EN 16931 standard and the Luxembourg specifications, covering both the B2B mandate and existing B2G obligations.

05 - ONBOARDING

KYC via API

Use the API to authorize us to process documents on behalf of your users, and submit the required KYC data at the same time. Everything digital, no paperwork.

06 - VISIBILITY

Delivery status & webhooks

Real-time transmission and delivery statuses are pushed straight back into the system that originated the document, no polling, no blind spots.

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API-FIRST BY DESIGN

With Dokapi, you’re not locked into someone else’s interface. You get a solid API foundation that fits seamlessly into your architecture.

Compliance Without Code Changes

Luxembourg and European e-invoicing regulations evolve constantly. Dokapi tracks every regulatory change and updates the platform automatically, so your integration stays compliant without you having to touch a line of code. When the e-reporting obligation arrives in 2030, you will already be ready.

One API, Every Flow

Whether you are sending, receiving, converting or validating documents, everything runs through a single unified API. There is no need to manage separate integrations for different document types, formats or countries, one connection handles it all, today and as your needs grow.

Up and Running in Hours

Dokapi's API comes with comprehensive documentation, a sandbox environment connected to the Peppol test network, and webhook support for real-time status updates.No lengthy onboarding, most integrations go live within days.

Secure, Certified and Audit-Ready

As a certified Peppol Access Point, Dokapi operates in accordance with the strict technical and security standards set by OpenPeppol and the Luxembourg Ministry for Digitalisation.

All document exchanges are encrypted end-to-end and every transaction is logged, but Dokapi does not store your documents themselves, keeping your data footprint small while ensuring you are always ready for regulatory scrutiny.

Our ISO certification goes beyond technology, covering our internal processes and people too, meaning our teams operate under strict, regularly audited procedures at every level of the organisation.

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