Norway has finalised the implementing rules for mandatory B2B e-invoicing, confirming the approved formats, transition period and key requirements ahead of the first phase taking effect on 1 January 2027.
This follows earlier developments in Norway’s move towards mandatory B2B e-invoicing and digital bookkeeping. Dynatos previously covered the country’s accelerated B2B e-invoicing and digital bookkeeping plans, followed by the later update on Norway’s confirmed B2B e-invoicing mandate from 2027. The latest rules now give businesses more detail on formats, transition arrangements and practical preparation.
The Norwegian Tax Directorate adopted amendments to the Bookkeeping Regulation on 29 September 2026. These amendments confirm what will be required from 2027, and how Norway will move towards broader electronic invoicing and digital bookkeeping by 2030.
For finance teams, the update is important because it turns Norway’s mandate from a future policy direction into a concrete implementation timeline. Businesses now need to check whether their systems can create, send, receive and archive structured invoice data in the right format.
What changes from 1 January 2027?
From 1 January 2027, businesses subject to Norwegian bookkeeping obligations must issue structured electronic invoices to business customers that are registered to receive e-invoices through ELMA or Peppol.
This means the sending obligation is linked to the customer’s ability to receive e-invoices. If a customer is not registered to receive electronic invoices, the sender is not yet required to issue an e-invoice in that case. PDF invoices can still be used for those customers during the transition period.
The requirement to retain e-invoices in their original structured format also applies from 1 January 2027. This is an important operational point: compliance is not only about sending the invoice correctly, but also about preserving the structured invoice file for audit and control purposes.
Which formats are approved?
Norway has confirmed the following approved formats:
- EHF Invoicing, version 3.0 or later
- Peppol BIS Billing, version 3.0 or later
- EHF Self-Billing, version 3.0 or later
- Peppol BIS Self-Billing, version 3.0 or later
Other qualifying structured formats, including EDIFACT and E2B, may continue to be used until 31 December 2029, provided this is agreed with the recipient.
This transition period gives businesses time to move from existing structured formats towards the approved e-invoicing standards. However, companies operating across multiple countries should avoid treating this as a local technical change only. Format choices, customer onboarding and archiving requirements can affect wider invoice processing and compliance architecture.
What changes from 2028 and 2030?
From 1 January 2028, invoices sent to buyers subject to bookkeeping obligations must include the buyer’s organisation number. This adds another data quality requirement to the mandate and makes master data readiness an important part of preparation.
From 1 January 2030, all businesses required to keep accounts must use an electronic accounting system and be able to receive e-invoices. This is when the obligation to receive e-invoices becomes broader.
The timeline therefore has three important stages:
- 1 January 2027: Businesses subject to bookkeeping obligations must issue electronic invoices to customers registered to receive e-invoices through ELMA or Peppol. The definitions of electronic invoice and the requirement to store e-invoices in their original format also apply from this date.
- 1 January 2028: Invoices to buyers subject to bookkeeping obligations must include the buyer’s organisation number.
- 1 January 2030: Businesses required to keep accounts must use an electronic accounting system and be able to receive e-invoices.
Why this matters for finance teams
Norway’s mandate is another example of how e-invoicing is becoming part of a broader shift towards structured finance data, digital bookkeeping and more controlled invoice processes.
For finance teams, the practical question is not only whether an invoice can be sent through Peppol. The bigger question is whether invoice data can move through the full process in a structured, validated and auditable way.
Businesses should review:
- whether their invoicing and ERP systems support the approved formats;
- which customers are registered to receive e-invoices through ELMA or Peppol;
- whether invoice archives retain the original structured invoice file;
- whether buyer organisation numbers are available and maintained correctly;
- whether current formats such as EDIFACT or E2B need to be phased out before the end of 2029;
- how Norway fits into their wider European e-invoicing roadmap.
Preparing for the Norwegian mandate
The 2027 deadline gives businesses a clear starting point, but the impact will build over several years. Companies with Norwegian entities, customers or shared service operations should use this period to assess their invoice flows, customer data and archiving processes.
A phased approach can help avoid last-minute fixes. Start by identifying which Norwegian flows are in scope, which customers can already receive e-invoices, and where structured invoice data is currently created, transformed or stored.
For organisations working across multiple jurisdictions, Norway should also be assessed alongside other European e-invoicing mandates. Local mandates may have different timelines, but they increasingly point in the same direction: structured data, stronger controls and scalable compliance processes.
Dynatos helps businesses prepare for e-invoicing mandates across Europe with Routty, our solution for multi-country e-invoicing, Peppol connectivity and compliance-driven invoice automation.
