Spain Publishes Detailed Mandate Specifications

Spain's Tax Agency (AEAT) has published the first detailed technical and operational specifications for the country's upcoming B2B e-invoicing regime, providing businesses and service providers with a clearer picture of how compliance is expected to work in practice.

The documentation was released as part of the consultation process supporting Spain's draft Ministerial Order and represents an important step in the development of the regime.

The specifications provide additional detail on invoice exchange requirements, interoperability obligations, communication protocols and platform responsibilities.

One of the most notable aspects of the documentation is its focus on invoice lifecycle management.

In addition to the exchange of invoices, the proposed framework includes requirements for communicating invoice-related events, including invoice acceptance, rejection and payment status information.

The approach provides further insight into how Spain intends to operate its future e-invoicing ecosystem and suggests the regime will extend beyond invoice transmission alone.

The documentation also provides greater clarity for software providers, ERP vendors and service providers developing solutions to support compliance with the future mandate.

The publication follows the consultation period on the draft Ministerial Order, which closed on 8th May 2026.

For businesses preparing for Spain's upcoming mandate, the specifications provide the clearest indication yet of the operational and technical requirements likely to underpin the future framework.

The publication also highlights a broader trend emerging across the EU. While early e-invoicing mandates focused primarily on invoice exchange, newer frameworks are increasingly incorporating invoice lifecycle management requirements, allowing tax authorities and businesses to capture information relating to acceptance, rejection, payment status and other invoice-related events. 

Sources

• AEAT draft Ministerial Order technical specifications
• Spanish Ministry consultation documentation
• Consultation period closing 8th May 2026
• Spain B2B e-invoicing implementation materials

This content is intended to share insights and practical considerations based on industry experience. It does not constitute legal, regulatory, or financial advice. Regulatory requirements vary by jurisdiction and circumstance, so any compliance-related matters should be reviewed and validated with your own professional advisors.