Denmark’s revised Bookkeeping Act introduces mandatory digital readiness for e-invoicing, reshaping how businesses issue and receive invoices. While Denmark has not introduced a full B2B e-invoicing mandate, companies must ensure their accounting systems are technically capable of handling structured electronic invoices in line with approved standards and networks.
This approach positions Denmark as a “readiness-based” e-invoicing jurisdiction, where compliance is assessed through system capability rather than compulsory transaction-by-transaction clearance.
Denmark e-Invoicing: Regulation Overview
What is the scope of e-invoicing in Denmark?
Under the Danish Bookkeeping Act, businesses are required to use digital bookkeeping systems that support structured electronic invoicing. Although issuing B2B e-invoices is not mandatory, the ability to issue and receive structured e-invoices is mandatory.
This obligation applies to invoicing activities that form part of the company’s accounting processes and focuses on ensuring that systems are interoperable, standardized, and audit ready.
Businesses must therefore ensure that their invoicing setup:
- can generate structured e-invoices
- can receive structured e-invoices
- uses approved networks and formats defined under the Danish framework
Approved Networks and Formats
E-invoicing networks
Structured e-invoices in Denmark must be exchanged via:
- NemHandel
- PEPPOL
To use these networks, businesses must connect their accounting systems to a certified access point that meets the required security and interoperability standards.
Supported formats
Invoices must comply with PEPPOL BIS 3.0, which is fully aligned with EN 16931.
Denmark had previously planned to introduce OIOUBL 3.0 as a national format aligned with EN 16931. However, this approach has since been revised.
On 14 January 2026, the Danish Business Authority confirmed that OIOUBL 3.0 will not be introduced.
Instead of OIOUBL 3.0, Denmark is developing a single unified e-invoicing document standard intended to:
- support both domestic and cross-border invoicing
- reduce fragmentation between national and EU-level standards
- provide long-term clarity for businesses and service providers
Denmark e-Invoicing Timeline and Applicability
The e-invoicing readiness requirement follows the phased rollout of the Bookkeeping Act:
- 1 July 2024
Companies required to submit annual reports under the Annual Accounts Act and already using certified digital bookkeeping systems - 1 January 2025
Companies subject to the Annual Accounts Act using self-developed bookkeeping software - 1 January 2026
Sole proprietorships with annual net turnover exceeding DKK 300,000 for two consecutive years
From these dates onward, affected businesses must ensure their systems are capable of structured e-invoicing.
Denmark e-Invoicing Mandate
Who is affected?
The obligation applies broadly to:
- limited liability companies
- partnerships and sole proprietorships
- foreign companies with operations in Denmark
There is no size-based exemption. The determining factor is whether the entity falls within the scope of the Bookkeeping Act and uses digital bookkeeping systems.
What is not required?
It is important to note that Denmark:
- does not impose a mandatory B2B e-invoicing issuance obligation
- does not operate a clearance or real-time government validation model
Instead, compliance is assessed based on technical capability and system readiness.
How can SNI help you about e-Invoicing in Denmark?
SNI supports Denmark’s e-invoicing requirements by enabling businesses to achieve and maintain full technical readiness under the Bookkeeping Act.
With SNI, businesses can:
- generate and receive structured e-invoices in EN 16931-compliant XML
- connect seamlessly to NemHandel and PEPPOL via certified access points
- centralize e-invoicing processes in a user-friendly compliance cockpit
- remain aligned with Denmark’s evolving document strategy, including the upcoming unified standard
SNI solutions integrate with existing client systems without requiring ERP version upgrades and are compatible with:
- SAP ECC 4.7 and above
- SAP R/3
- SAP S/4HANA
- SAP Business Technology Platform (BTP)
- Non-SAP and ERP-independent environments
This ensures compliance with Danish e-invoicing requirements while minimizing implementation effort and operational disruption.
Frequently Asked Questions – Denmark E-Invoicing
Is B2B e-invoicing mandatory in Denmark?
No, Denmark does not currently impose a mandatory B2B e-invoicing issuance obligation. However, under the Danish Bookkeeping Act, businesses must ensure that their accounting systems are technically capable of issuing and receiving structured electronic invoices.
This means that even if a company continues to exchange invoices in PDF or other traditional formats, its underlying systems must be ready to handle structured e-invoices in approved formats and via approved networks. Denmark’s approach focuses on technical readiness rather than transactional enforcement, setting it apart from clearance-based e-invoicing models used in other countries.
Which e-invoicing formats are accepted in Denmark?
Structured e-invoices in Denmark must comply with PEPPOL BIS 3.0, which is fully aligned with the European standard EN 16931.
Denmark previously planned to introduce OIOUBL 3.0 as a national format aligned with EN 16931. However, the Danish Business Authority has officially confirmed that OIOUBL 3.0 will not be introduced. Instead, authorities are developing a single unified e-invoicing document standard designed to support both domestic and cross-border invoicing, providing long-term clarity and reducing format fragmentation.
Do companies need to connect to NemHandel or PEPPOL?
Yes. To exchange structured electronic invoices in Denmark, companies must use NemHandel or the PEPPOL network.
This requires the company’s accounting or invoicing system to be connected to a certified access point that meets Danish and European security and interoperability requirements. Companies do not connect directly to NemHandel or PEPPOL as end users. Instead, access is typically provided through their ERP system or a specialized service provider. Ensuring this connectivity is a key part of meeting the Bookkeeping Act’s e-invoicing readiness requirements.
Does the Bookkeeping Act apply to foreign companies operating in Denmark?
Yes. The Danish Bookkeeping Act applies not only to Danish-registered entities but also to foreign companies with operations in Denmark, provided they fall within the scope of the act.
If a foreign company carries out taxable or reportable activities in Denmark and uses digital bookkeeping systems, it must ensure that those systems meet the technical requirements of the act. This includes the ability to issue and receive structured e-invoices using approved networks and formats, even if the company’s global invoicing setup is managed outside Denmark.
Is a government platform or real-time invoice validation required?
No. Denmark does not operate a clearance model and does not require real-time invoice submission or validation by a government platform.
Invoices exchanged via NemHandel or PEPPOL are not pre-approved or validated by the tax authorities. Instead, compliance is ensured through standardized formats, secure networks, and digital bookkeeping requirements. This makes Denmark’s model fundamentally different from clearance-based regimes and places greater responsibility on businesses to ensure their systems are compliant and audit-ready.
How does Denmark’s e-invoicing approach differ from other EU mandates?
Denmark’s approach differs from many EU e-invoicing mandates by focusing on system capability rather than mandatory invoice issuance.
While several countries require all B2B invoices to be issued through a central platform or validated in real time, Denmark requires businesses to maintain accounting systems that are ready to handle structured e-invoices if or when needed. This creates a flexible but technically demanding environment, where compliance is assessed during audits rather than at the point of invoice exchange.