Fiscal subject related
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Modernising e-Invoicing standards
Denmark is updating its national document formats as part of a long-term digital strategy.
OIOUBL 2.1
- Published on 14 October 2025,
- Introduces optional fields for CO₂ and climate-related data,
- Helps reduce manual reporting for businesses.
OIOUBL 3.0
- Upgrade postponed to early 2026,
- Extra time is needed for further analysis and cost evaluation.
SAF-T 2.0
- Final review is underway,
- Expected publication: end of 2025,
- Will support more structured, automated financial data management.
Public sector e-Invoicing expands
Denmark already requires all suppliers to send e-invoices to public authorities (B2G).
Now the government is considering the next step: public authorities sending e-invoices to businesses (G2B).
If approved, this could eliminate remaining paper and PDF workflows and streamline communication between the public and private sectors.
Digital bookkeeping requirements for all businesses
There is currently no mandate for B2B or B2C e-invoicing. However, under the 2022 Bookkeeping Act, all businesses must be capable of digital bookkeeping and issuing e-invoices.
Compliance deadlines:
- January 2026 → Standard bookkeeping systems,
- July 2026 → In-house developed systems.
Preparing for ViDA (Starting July 2030)
With ViDA introducing EU-wide digital VAT reporting, Denmark is reviewing new requirements to increase automation in national bookkeeping systems.
Proposed measures include:
- 70% e-invoicing adoption by 2027,
- Mandatory registration in the Nemhandelregisteret (with opt-out),
- API-based integration with Nemhandel for automatic identification of e-invoice recipients.
These rules would first apply to Standard Digital Bookkeeping Systems, then later to customised or in-house systems.
What should businesses expect?
Over the next few years, businesses operating in Denmark will see:
- more structured, standardised e-invoicing,
- stricter digital bookkeeping requirements,
- greater automation in financial workflows,
- alignment with EU-wide ViDA digital reporting.
Denmark’s early action puts it among the leading EU countries in digital compliance. Now is the right time for companies to review their systems, strengthen integrations, and prepare for upcoming EU and national obligations
Other news from Denmark
New document was uploaded: Technical country overview - Denmark
Denmark
Author: Ištvan Božoki
This document is a technical overview for a fiscalization system, specifically for Denmark’s cash register and SAF-T reporting framework. Read more
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Already subscriber? LoginDenmark to Replace OIOUBL with NemHandel BIS 4
Denmark
Author: Ivana Picajkić
Denmark will gradually replace the OIOUBL 2.1 e-invoicing format with NemHandel BIS 4, a new Peppol-based standard aligned with EN-16931 and future EU ViDA requirements, with migration planned between 2028 and mid-2029. On February 24, 2026, the Danish Business Authority announced that the national e-invoicing format OIOUBL 2.1 will be gradually replaced by NemHandel BIS 4, a new format based on t... Read more
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From 1 January 2026, Denmark’s Bookkeeping Act will require VAT-registered businesses with turnover above DKK 300,000—including foreign VAT-registered entities—to use compliant digital accounting systems instead of paper-based records. These systems must support structured e-invoicing (OIOUBL/Peppol BIS), digital archiving, and SAF-T generation, with non-compliance subject to supervision by the Da... Read more