On 20 October 2026, the Norwegian Tax Administration published updated guidance on A1 certificates, which determine the country where social security contributions must be paid for cross-border workers. The guidance emphasizes that digitalization of the A1 application process only delivers compliance benefits when the entire chain—from application through payroll processing to final tax reporting—functions seamlessly. This update is particularly relevant for multinational employers and posted workers operating under the EU/EEA social security coordination regulations (Regulations 883/2004 and 987/2009). The Tax Administration highlights common errors in the digital workflow that lead to incorrect contribution payments and potential penalties.
Key Takeaways
- End-to-End Digital Chain Required: Employers must ensure that A1 certificate data flows automatically from the NAV (Norwegian Labour and Welfare Administration) portal into payroll systems and onward to the monthly a-melding (electronic employer reporting) without manual intervention, reducing risk of mismatched contribution liabilities.
- Retroactive Corrections Limited: The guidance clarifies that retroactive corrections to A1 status are only accepted within strict timeframes; failure to update payroll systems promptly after receiving an A1 decision can result in permanent loss of deduction rights for the employer and unexpected tax liabilities for the employee.
- Coordination with Foreign Authorities: For workers posted from non-EEA countries with bilateral social security agreements (e.g., USA, Canada), the guidance specifies additional documentation requirements and longer processing times, urging employers to initiate applications at least 90 days before the posting start date.
Disclaimer: This article is compiled and summarized by the AI based on publicly available information and is for general information purposes only. It does not constitute any form of formal tax advice, legal opinion, or basis for performance. Please consult a qualified professional tax advisor or legal counsel for tax advice.
Source: Read Official Announcement