Spain has approved a Royal Decree introducing mandatory B2B e-invoicing, requiring businesses to exchange structured invoices through either private platforms or a future public system, in line with EU VAT digitalization goals. The obligation will be implemented in phases—likely from mid-2027 for large companies and mid-2028 for others—once technical specifications are officially published.
Spain approves mandatory B2B E-Invoicing
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Spain
Author: Nikolina Basić
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Content accuracy validation date:
06.04.2026
Content accuracy validation time:
08:26h
Spain has officially taken a step toward modernizing its invoicing system. On March 24, the Council of Ministers approved a Royal Decree that makes electronic invoicing mandatory for business-to-business (B2B) transactions, setting the stage for a major compliance shift across the country.
Structured e-invoicing will allow invoices to be tracked from issuance to payment, giving businesses — especially small and medium-sized enterprises — greater certainty and efficiency.
The mandate applies to B2B transactions between companies and professionals operating in Spain. It is part of the broader implementation of Article 12 of the Ley Crea y Crece and aligns with Europe’s push toward VAT digitization.
Spain’s model offers two main channels for e-invoice exchange:
- Private platforms — approved service providers that must ensure interoperability and security.
- Public platform — a free solution under development by the Spanish Tax Agency (AEAT), designed to support smaller businesses and self-employed professionals.
Accepted formats will include UBL, Facturae, CII, and EDIFACT. Private operators may need to convert between formats while maintaining authenticity and integrity.
The rollout will be phased according to company size:
- Large businesses (turnover above €8 million): one year to comply.
- All other businesses: two years to comply.
Although the Royal Decree has been approved, the obligation does not take effect immediately. Enforcement depends on the publication of a Ministerial Order. These deadlines will begin once the Ministry of Finance publishes the technical specifications of the public platform, expected before July 1, 2026. If that timeline holds, compliance dates will likely fall around July 2027 for large businesses and July 2028 for smaller ones.
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