Denmark's SAF-T 2.0: Modernising Digital Accounting Standards

Denmark has released SAF-T 2.0 as part of its comprehensive modernisation of digital bookkeeping standards under the Bogforingsloven (Bookkeeping Act). Published by the Danish Business Authority (Erhvervsstyrelsen), the updated standard represents Denmark's commitment to a digital-first approach to financial record-keeping, requiring all businesses whose annual turnover exceeds 300,000 DKK in two consecutive years to use certified digital bookkeeping systems with SAF-T export capability.

The official SAF-T 2.0 documentation is published by the Danish Business Authority (Erhvervsstyrelsen).

Unlike countries that adopted SAF-T primarily as a tax audit tool, Denmark is positioning SAF-T 2.0 as part of a broader ecosystem that includes mandatory digital bookkeeping, system certification, and B2G (business-to-government) e-invoicing validation rules. This article examines what SAF-T 2.0 means for businesses operating in Denmark and the lessons it holds for the wider European compliance environment.

Background: The 2022 Bookkeeping Act

Denmark's Bogforingsloven was significantly amended in 2022 to introduce mandatory digital bookkeeping requirements. The legislation reflects a recognition that modern tax administration requires structured, machine-readable financial data rather than traditional paper-based or PDF records.

Key Provisions of the Bookkeeping Act

• •Mandatory digital bookkeeping: All businesses whose annual turnover exceeds 300,000 DKK (approximately EUR 40,000) in two consecutive years must use a digital bookkeeping system. This threshold covers the vast majority of active Danish businesses.
• •System certification: Digital bookkeeping systems must be registered with the Danish Business Authority (Erhvervsstyrelsen). Systems must meet specific technical requirements, including the ability to export data in SAF-T format.
• •Data retention in the cloud: The Act requires that bookkeeping data be stored in a manner that ensures it is accessible and cannot be altered retroactively. Cloud-based storage with audit trails is the practical implementation path.
• •Automatic reporting capability: Certified systems must support automatic or semi-automatic submission of financial data to authorities when requested, reducing the manual burden on businesses during audits.

SAF-T 2.0: What Is New

Denmark's SAF-T 2.0 builds on the original OECD SAF-T standard (version 2.0) but incorporates Danish-specific requirements and modernisations. The standard has been published by the Danish Business Authority (Erhvervsstyrelsen) and is available on their official GitLab repository. Registered bookkeeping systems must support SAF-T 2.0 from January 1, 2027.

Key Differences from the Base OECD Standard

The most notable enhancement is the tight integration with Denmark's existing digital infrastructure. SAF-T 2.0 is designed to work smoothly with NemHandel (Denmark's e-invoicing network built on PEPPOL), MitID (digital identity, which replaced NemID in 2023), and the Danish Business Authority's registration systems. This integration means SAF-T is not a standalone reporting obligation but a component of a integrated digital ecosystem.

Bookkeeping System Certification Requirements

A distinctive feature of Denmark's approach is the certification requirement for bookkeeping software. The Danish Business Authority maintains a public register of certified systems, and businesses must use a registered system to comply with the Bookkeeping Act.

What Certification Requires

• •SAF-T export functionality: The system must generate compliant SAF-T 2.0 audit files on demand. This is a hard requirement; systems without SAF-T export cannot be certified.
• •Audit trail integrity: All modifications to bookkeeping entries must be logged with timestamps and user identification. Deletion of entries is not permitted; only correction entries are allowed.
• •Data backup and recovery: Systems must implement automated backup procedures and demonstrate data recovery capabilities. Cloud-hosted solutions with redundant storage meet this requirement by design.
• •Automated access for authorities: Certified systems must provide a mechanism for authorised data access by tax and business authorities, either through direct system integration or standardised export procedures.
• •Ongoing compliance: Certification is not a one-time event. Vendors must demonstrate continued compliance through regular assessments and must update their systems when SAF-T standards evolve.

B2G E-Invoicing Validation Rules

Effective November 2025, Denmark introduced updated validation rules for B2G (business-to-government) electronic invoices. These rules tighten the requirements for invoices submitted to public sector entities and represent a step toward the broader e-invoicing standardisation envisioned under EU ViDA.

Key Validation Requirements

• •PEPPOL BIS Billing 3.0 compliance: All B2G invoices must conform to the PEPPOL BIS Billing 3.0 specification, which is itself based on the EN 16931 European e-invoicing standard.
• •Danish CIUS validation: In addition to the base PEPPOL rules, invoices must pass Denmark's Core Invoice Usage Specification (CIUS) validation, which adds country-specific business rules.
• •EAN location numbers: Public sector recipients are identified by EAN (European Article Number) location codes. Invoices must include the correct recipient EAN to be routed properly through NemHandel.
• •Structured payment references: Payment details must include structured references (FIK/OCR numbers) that enable automated reconciliation by public sector accounting systems.

These B2G validation rules serve as a precursor to broader B2B e-invoicing requirements that are expected to align with the EU ViDA timeline, similar to the approach taken by France's mandatory e-invoicing rollout. Businesses that achieve B2G compliance now will be well positioned for future B2B mandates.

Denmark's Digital-First Strategy

Denmark has long prioritised digital infrastructure in public administration. Its tax and business reporting infrastructure reflects this digital maturity, and the SAF-T and digital bookkeeping initiatives are part of a broader national strategy.

• •MitID digital identity: Denmark's national digital identity system provides secure authentication for all government interactions, including tax filing and business registration. SAF-T submissions will use MitID for authentication.
• •Digital Post (e-Boks): All official government communications are delivered digitally. Tax assessments, audit requests, and compliance notices arrive through the Digital Post system, creating an end-to-end digital workflow.
• •Open data initiatives: Denmark publishes business registration data, financial statements, and other public records in open, machine-readable formats. SAF-T 2.0 fits naturally into this open data philosophy.

Denmark's approach goes beyond digitising existing paper processes. The goal is to rethink how financial data flows between businesses, accountants, and government. SAF-T 2.0 is one component of that broader vision.

Timeline and What to Expect

With digital bookkeeping now mandatory for businesses above the DKK 300,000 threshold and SAF-T 2.0 officially released, businesses operating in Denmark should confirm their vendor's certification status and test SAF-T export functionality. Registered systems must support SAF-T 2.0 by January 2027, leaving limited time for system changes or vendor migrations.

Lessons for Other Nordic and EU Countries

Denmark's integrated approach to digital bookkeeping and SAF-T offers several lessons for other countries considering or developing SAF-T mandates:

• •Embed SAF-T in software certification: By making SAF-T export a certification requirement, Denmark ensures universal capability without relying solely on compliance enforcement after the fact.
• •Connect SAF-T to e-invoicing: Denmark's linkage between SAF-T and NemHandel/PEPPOL infrastructure demonstrates how SAF-T and e-invoicing can reinforce each other rather than exist as parallel obligations.
• •Phase implementation thoughtfully: Denmark's multi-year timeline (2022 legislation, 2024 registration, 2027 enforcement) gives vendors and businesses adequate preparation time, reducing the risk of rushed, non-compliant implementations.
• •Align with EU ViDA: By building on PEPPOL and EN 16931 standards, Denmark positions its national infrastructure for smooth integration with the EU's ViDA framework, avoiding the need for costly realignment later.