🇱🇺 Luxembourg E-Invoicing Guide

Luxembourg, as a major European financial and business hub, has implemented mandatory B2G e-invoicing since 2022, following the transposition of EU Directive 2014/55/EU. The country has adopted Peppol BIS 3.0 as its e-invoicing standard, leveraging the pan-European Peppol network for both government and cross-border transactions. Luxembourg's approach is pragmatic and standards-aligned, with no proprietary national format — making it one of the most straightforward EU countries for e-invoicing compliance.

For businesses supplying goods or services to Luxembourg's public sector, or for companies looking ahead to the EU ViDA directive's broader B2B requirements, understanding Luxembourg's e-invoicing rules is essential for maintaining smooth commercial operations.

Timeline of E-Invoicing in Luxembourg

Who Is Affected?

B2G (Business-to-Government)

All suppliers to Luxembourg public-sector entities must issue structured electronic invoices since 2022. This includes suppliers to central government ministries, municipalities, public establishments, and state-funded institutions. The requirement applies equally to domestic Luxembourg businesses and international suppliers. Invoices must be transmitted in Peppol BIS 3.0 format through the Peppol network — PDF invoices sent by email do not satisfy the legal requirement.

B2B (Business-to-Business)

There is currently no domestic B2B e-invoicing mandate in Luxembourg. However, given the country's international business profile — with many companies engaged in cross-border EU trade — the upcoming ViDA directive will have significant implications. Businesses that establish Peppol connectivity now for B2G compliance will be well-positioned for future B2B requirements.

B2C (Business-to-Consumer)

E-invoicing to consumers is not mandated in Luxembourg. Consumer invoices can be issued in any format, including paper and PDF, subject to standard Luxembourg VAT law requirements for invoice content.

Accepted E-Invoice Format

Peppol BIS Billing 3.0 (UBL 2.1)

Luxembourg has adopted Peppol BIS 3.0 as its sole e-invoicing standard for B2G transactions. Unlike countries such as Austria (ebInterface) or Finland (Finvoice) that maintain national formats alongside Peppol, Luxembourg uses Peppol BIS 3.0 exclusively. This simplifies compliance for suppliers, who only need to implement a single format.

Peppol BIS 3.0 invoices are based on the UBL 2.1 (Universal Business Language) XML schema and must conform to the Peppol business rules, including validation of mandatory fields such as invoice number, issue date, seller and buyer identification, line items, VAT breakdown, and payment information.

The format supports both standard invoices and credit notes, with a dedicated credit note document type that references the original invoice.

For businesses that also operate in Germany or France, the related XRechnung, ZUGFeRD, and Factur-X formats share the same underlying UBL/CII data models, making multi-country compliance more manageable.

How to Send E-Invoices in Luxembourg

To send compliant e-invoices to Luxembourg government entities, follow these steps:

1. Connect to the Peppol Network: Register with a certified Peppol Access Point provider. Your Access Point handles the secure routing and delivery of invoices through the Peppol eDelivery network.
2. Register Your Peppol Identifier: Your organization needs a Peppol Participant Identifier. For Luxembourg entities, this is typically based on the Luxembourg business registration number (Numero de registre de commerce) or the EU VAT number using the appropriate Peppol scheme.
3. Look Up the Recipient: Verify the government entity's Peppol endpoint in the Peppol Service Metadata Publisher (SMP) directory. Luxembourg government entities registered on the Peppol network can be discovered through standard Peppol lookup procedures.
4. Generate Compliant XML: Create your invoice in Peppol BIS 3.0 format, ensuring all mandatory fields are populated and the invoice passes Peppol validation rules. InvoicePeppol can convert your existing PDF invoices into compliant Peppol BIS 3.0 XML.
5. Transmit via Your Access Point: Submit the validated invoice through your Peppol Access Point for delivery to the government entity.

Luxembourg's Multilingual Considerations

Luxembourg is a trilingual country (Luxembourgish, French, and German), and business is commonly conducted in French, German, and English. Peppol BIS 3.0 invoices can include text in any language, and there is no legal requirement to issue invoices in a specific language. However, for government procurement, the language specified in the procurement contract should typically be used for invoice descriptions and notes. The structured nature of Peppol XML means that key data fields (amounts, dates, identifiers) are language-neutral.

Cross-Border E-Invoicing with Luxembourg

Luxembourg's pure Peppol approach makes cross-border e-invoicing particularly straightforward. If you are already connected to the Peppol network for invoicing in Sweden, Finland, Austria, or any other Peppol-connected country, the same Access Point and the same Peppol BIS 3.0 format works for Luxembourg without any additional country-specific adaptations. This is a significant advantage over countries that require proprietary national formats.

Given Luxembourg's role as a financial center with a disproportionately high volume of cross-border business relative to its size, the Peppol-only approach was a deliberate choice to minimize friction for international trade.

Frequently Asked Questions