Denmark E-Invoicing Mandate: A Comprehensive Compliance Guide

Denmark has been using digital invoicing infrastructure for many years and is one of Europe’s more mature e-invoicing markets. E-invoicing has long been mandatory for transactions with public authorities, while the private sector is moving further toward structured electronic invoicing through digital bookkeeping requirements and the NemHandel infrastructure.

The current framework in Denmark can be viewed under two main areas: mandatory B2G e-invoicing and digital bookkeeping requirements that support wider B2B e-invoicing adoption.

Who Is Subject to the Denmark E-Invoicing Mandate?

B2G Transactions

In Denmark, invoices sent to public authorities must be issued electronically.

Public entities are required to receive and process structured electronic invoices. Businesses can send invoices to public authorities through Denmark’s national electronic document infrastructure, NemHandel.

Electronic invoicing with the public sector has been part of Denmark’s digital framework for many years, and the acceptance of EN 16931-compliant electronic invoices is also part of the current legal environment.

B2B Transactions

There is currently no general B2B e-invoicing mandate for domestic business-to-business transactions in Denmark.

However, digital bookkeeping rules require certain businesses to use accounting systems that can send and receive electronic invoices.

As a result, the current B2B transition is focused less on making every invoice electronic and more on ensuring that companies have the technical infrastructure needed to handle structured e-invoices.

B2C Transactions

There is no general e-invoicing mandate for B2C transactions with private consumers.

How Do Digital Bookkeeping Requirements Affect E-Invoicing in Denmark?

Denmark’s 2022 Bookkeeping Act introduced requirements for businesses to move their bookkeeping processes into digital systems.

The transition began earlier for companies subject to annual reporting requirements. From January 1, 2026, digital bookkeeping requirements also apply to businesses without annual reporting obligations if their net turnover exceeds DKK 300,000 in two consecutive financial years.

Digital bookkeeping systems within scope must support:

• sending and receiving electronic invoices,

• sending and receiving electronic credit notes,

• OIOUBL,

• Peppol BIS.

These requirements ensure that businesses using digital bookkeeping systems are technically prepared for structured electronic invoice exchange.

How Are E-Invoices Sent in Denmark?

The core infrastructure for electronic business document exchange in Denmark is NemHandel.

NemHandel provides a national framework for exchanging invoices, orders, and other commercial documents between systems in a standardized way.

Its key components include:

• electronic document standards,

• NemHandelsregisteret, which contains recipient information,

• AS4-based document transmission infrastructure.

NemHandelsregisteret helps determine where an electronic document should be sent and which system should receive it.

A simplified flow can be shown as:

Sender → Service Provider / Access Point → NemHandel → Recipient

Peppol can also be used as part of Denmark’s broader electronic document exchange ecosystem, particularly in cross-border scenarios.

What Is the Difference Between NemHandel and Peppol?

NemHandel is Denmark’s national infrastructure for electronic business document exchange. Peppol is an international network that supports electronic document exchange between businesses and public organizations across multiple countries.

NemHandel is particularly relevant for domestic Danish processes and local document standards.

Peppol, on the other hand:

• provides broader international reach,

• uses common specifications such as Peppol BIS,

• supports interoperability between systems in different countries.

For businesses operating in Denmark, the two infrastructures can be viewed as complementary rather than as direct alternatives.

What E-Invoicing Formats Are Used in Denmark?

Two main structured invoice standards are particularly relevant in Denmark.

OIOUBL

OIOUBL is Denmark’s national electronic document standard.

Based on UBL, it provides a standardized structure for invoices, credit notes, and other business documents. It is widely used for electronic document exchange within Denmark.

Peppol BIS Billing

Peppol BIS Billing is an electronic invoicing specification aligned with EN 16931.

Digital bookkeeping systems in Denmark are required to support the sending and receiving of electronic invoices and credit notes in Peppol BIS format.

This format is especially relevant for transactions carried out over the Peppol network and for companies operating across multiple European markets.

What Changes for Digital Bookkeeping Systems in 2027?

The Danish Business Authority is introducing new requirements for registered digital bookkeeping systems to encourage wider use of electronic invoicing.

From March 1, 2027, companies are expected to be automatically registered in NemHandelsregisteret during certain identity verification processes. Businesses will retain the option to opt out.

Bookkeeping systems will also need to check whether a recipient can receive e-invoices through NemHandel when an invoice is created and present the electronic invoicing option where applicable.

These changes do not create a general B2B e-invoicing mandate. Instead, they make electronic invoicing a more integrated part of everyday bookkeeping processes.

When Will B2B E-Invoicing Become Mandatory in Denmark?

Denmark has not announced a general national mandate date for domestic B2B e-invoicing.

Under the European Union’s VAT in the Digital Age (ViDA) framework, electronic invoicing and digital reporting requirements for certain intra-EU B2B transactions are expected to apply from July 1, 2030.

Whether Denmark introduces a separate domestic B2B mandate before that date will depend on future national legislation.

What Does Peppol Offer Businesses Operating in Denmark?

Peppol provides a common electronic document infrastructure for companies operating across multiple countries.

Because invoices exchanged through Peppol BIS contain structured data, ERP and accounting systems can read and process invoice information automatically, reducing the need for manual data entry.

Peppol BIS is also aligned with EN 16931, which helps companies manage e-invoicing processes across different European markets using a more consistent technical framework.

For businesses operating both in Denmark and in other Peppol markets, this can make country-specific integrations easier to manage within a shared architecture.

How Can You Prepare for E-Invoicing in Denmark?

Businesses operating in Denmark should first determine which requirements apply to them based on the types of transactions they handle.

For companies invoicing public authorities, NemHandel and structured e-invoicing support are directly relevant.

For private-sector processes, it is important to check whether your accounting or ERP system supports:

• OIOUBL,

• Peppol BIS,

• NemHandel connectivity,

• sending and receiving structured electronic invoices.

If you operate in multiple countries, reviewing Denmark’s local requirements together with your Peppol processes in other markets can help you manage integrations within a more consistent infrastructure.

Manage Peppol E-Invoicing Processes with JetPeppol

JetPeppol is a global e-invoicing platform operating through MDP Group’s Peppol Access Point infrastructure.

With JetPeppol, you can send and receive structured electronic invoices in Peppol BIS Billing 3.0 format over the Peppol network. You can view incoming documents on a single platform and track outgoing invoice statuses such as draft, sent, delivered, or error.

You can receive incoming e-invoice data in a format ready for transfer to your ERP system. This reduces the need to re-enter invoice information manually and supports faster processing within your accounting workflows.

This structure also supports businesses that manage electronic invoicing processes in Denmark alongside other Peppol markets through a common platform.