Patricia Martínez Ruiz
Mandatory electronic invoicing in Spain is now a reality. With the approval of the Royal Decree implementing the Crea y Crece Act, the regulatory framework has been established, ushering in a profound change in the way companies manage their invoicing processes in B2B environments.
The next milestone will be the publication of the Ministerial Order, scheduled for October 2026. From that point on, the deadlines will take effect. For large companies (over €8 million), compliance will be mandatory as of October 1, 2027. For all other companies (under €8 million), the requirement will take effect as of October 1, 2028.
If you work with SAP, this isn’t a minor adjustment. It’s a structural change that directly impacts your architecture.
What is the Crea y Crece Act, and why is it changing the billing model?
The Crea y Crece Act makes electronic invoicing mandatory in transactions between businesses and professionals, with three clear objectives:
- Reducing Delinquent Accounts
- Improve the traceability of operations
- Promoting Business Digitalization
But the real change isn’t about whether it’s mandatory.
It’s about how the information is managed.
As detailed in the technical documentation, the model requires that the invoice cease to be a static document and instead become a data stream with full traceability.
Timeline for Mandatory Electronic Invoicing in Spain
One of the most common mistakes is thinking that “there’s still time.”
The schedule is clear:
- 2026: Publication of the Ministerial Order (scheduled for before July)
- 2027: Mandatory for companies with revenue exceeding 8 million euros
- 2028: Mandatory for all other companies
In addition, during the first year, electronic invoices must be accompanied by a PDF file to ensure they are legible.
The problem isn’t the deadline.
The problem is that SAP projects can’t be improvised.
Key Requirements of the Crea y Crece Act
Compliance with regulations involves much more than just issuing electronic invoices.
Communication with Public and Private Platforms
Companies may operate through:
- AEAT Public Platform
- Interoperable private platforms
These platforms must exchange information with one another and report the status of invoices to the Administration.
Invoice Status Management
One of the most significant changes is the requirement to provide information about the invoice’s lifecycle:
- Acceptance or Rejection
- Date for each state
- Payment Information
All of this must be completed within a maximum of 4 calendar days. This requires integrating processes that are currently often disconnected.
Required Structured Formats
Invoices must be generated in structured formats such as:
- Facturae
- UBL
- CII
- EDIFACT
This definitively eliminates PDF as the primary format and requires working with source data.
Implementation Options in SAP
This is where many companies get their diagnosis wrong. It’s not a billing issue.
It’s an architectural issue. Adaptation involves:
- Integration with external platforms
- Event and Invoice Status Management
- Format Conversion
- Monitoring and Traceability
- Compatibility with other regulations (SII, TicketBAI, etc.)
As shown in the deployment diagrams, the solution may affect multiple layers of the SAP system.
And that requires a well-thought-out decision from the very beginning.
Depending on each organization’s situation, there are two main approaches.
1. Evolution of Existing Solutions
For organizations that already have regulatory compliance platforms in place, the evolving landscape makes it possible to:
- Centralize all regulations in a single system
- Reduce lead times
- Minimize implementation costs
- Leverage existing integrations
It’s the most efficient way if you already have a solid foundation.
2. SAP Document and Reporting Compliance (DRC)
For companies seeking standardization, the approach involves SAP:
- SAP DRC for Construction
- Integration with SAP Integration Suite
- Architecture aligned with the SAP roadmap
This model offers greater strategic alignment, but requires more effort up front.
How to Choose the Right Approach
This is where the most costly mistakes are made. The choice isn’t based solely on regulations. It depends on:
- Your SAP Evolution Strategy
- Your level of standardization
- Your Roadmap to the Cloud
- Total Cost of Ownership
- The ability to adapt to future regulations
Making the wrong choice doesn’t put you out of compliance. It forces you to redo the solution in a few years.
The “Crea y Crece” Law isn’t just another requirement. It’s an opportunity to review and improve your billing model.
Companies that take action now will be able to:
- Reducing Risks
- Avoid making hasty decisions
- Optimize Your SAP Architecture
- Improving Operational Efficiency
Those who wait will simply react… and pay the price.
At i3S, we work with organizations that need more than just to meet requirements—they need to make the right decisions from the start.
Because adapting your SAP system for electronic invoicing doesn’t start when the law takes effect.
It starts when you decide how you’re going to do it.
