Spain’s transition to mandatory e-invoicing is transforming the way businesses handle invoices. Discover the details of Spain’s e-invoicing regulations and how SNI’s solution helps businesses stay fully compliant with these requirements.
Spain has established an electronic invoicing framework for public sector transactions and is preparing to extend structured electronic invoicing requirements to Business-to-Business (B2B) transactions under Law 18/2022 (Crea y Crece Law).
Electronic invoicing obligations currently apply to suppliers invoicing Spanish public administrations. Future legislation will introduce mandatory electronic invoicing for transactions between businesses operating in Spain once implementing regulations are adopted.
Existing B2G e-Invoicing System in Spain
Electronic invoicing has been mandatory for Business-to-Government (B2G) transactions in Spain since 2015. Companies issuing invoices to public authorities must submit invoices electronically through the government’s official infrastructure.
Key characteristics of the B2G framework include:
- submission of invoices in structured electronic format
- transmission through the FACe electronic entry platform or integrated service providers
- electronic submission required for invoice acceptance by public administrations
- electronic processing linked to payment workflows within the public sector
This obligation applies to suppliers providing goods or services to Spanish public entities regardless of company size, subject to applicable administrative rules.
Spain B2B e-Invoicing
Spain has introduced the legal basis for mandatory B2B electronic invoicing through Law 18/2022 on business creation and growth (“Ley Crea y Crece”).
The law establishes the requirement for entrepreneurs and professionals to issue, transmit, and receive electronic invoices in commercial transactions with other businesses. The obligation applies to domestic B2B relationships once operational rules are defined through secondary regulation.
The future B2B framework is intended to support:
- structured electronic invoice exchange between businesses
- monitoring of invoice payment status
- improved transparency of commercial transactions
- standardized digital invoicing practices across the private sector
Detailed operational requirements, technical formats, and exchange mechanisms will be defined in implementing regulations that have not yet been finalized.
Legal Basis: The Crea y Crece Law
Law 18/2022 establishes electronic invoicing as a mandatory requirement for transactions between entrepreneurs and professionals in Spain. The regulation forms part of broader measures addressing business digitalization and commercial payment practices.
Under the law:
- electronic invoices will become mandatory in B2B transactions
- businesses must be able to issue, send, receive, and process electronic invoices
- invoice status information related to payment may be required to be reported
- interoperability between electronic invoicing solutions must be ensured
The law defines the obligation at a legislative level but delegates technical implementation details to subsequent regulatory instruments.
As a result, compliance requirements will become fully enforceable only after secondary legislation specifies technical standards and operational procedures.
e-Invoicing Spain: Implementation Timeline
The implementation timeline for mandatory B2B e-invoicing is linked to the publication of implementing regulations rather than a fixed calendar date.
The legislative mechanism provides that:
- the Spanish government will publish secondary regulation defining technical specifications and system operation
- mandatory compliance periods will begin following the entry into force of those regulations
- large companies will be required to comply first
- small and medium-sized enterprises will be granted an additional transition period
The adaptation periods are calculated from the approval date of the implementing regulation. Therefore, final compliance deadlines cannot be confirmed until the secondary legislation is officially adopted.
As of now, Spanish authorities have not published the final technical regulation establishing operational start dates.
Current Regulatory Status
Spain’s electronic invoicing environment currently consists of:
- mandatory structured electronic invoicing for B2G transactions
- a legally approved framework introducing future mandatory B2B electronic invoicing
- pending implementing regulation defining technical and operational requirements
Businesses operating in Spain are expected to comply with mandatory B2B electronic invoicing once secondary legislation enters into force and transition periods begin.
How can SNI help you about e-Invoicing in Spain?
SNI offers an end-to-end solution supporting compliance with electronic invoicing requirements established by the Spanish tax authority. The solution performs data retrieval from clients’ ERP systems, data mapping, processing, and secure communication with tax authorities through the relevant government platforms.
With this solution, end users can easily create electronic invoices and monitor both structured XML files and human-readable HTML/PDF versions through the user-friendly SNI e-invoice cockpit. SNI’s solution uses dedicated customization tables containing the required data fields defined by the Spanish tax authority (AEAT), enabling efficient invoice processing and standardized electronic invoice generation.
After generating the electronic invoice, SNI’s solution supports electronic signing and submission of invoices through the applicable government portal, ensuring alignment with regulatory requirements.
All inbound invoices are displayed within SNI’s Inbound Cockpit, a dedicated interface designed to enhance usability and enable efficient invoice management. Each invoice is accessible in both structured XML and human-readable HTML/PDF formats, providing transparency and facilitating compliance monitoring.
SNI’s invoice reconciliation functionality enables automated validation of incoming invoices by matching them against purchase orders, delivery documents, or internal financial records. This process reduces manual intervention, minimizes errors, and accelerates invoice validation workflows, helping businesses maintain accurate financial operations.
SNI’s solution integrates with client systems without requiring updates to existing system versions and operates independently of SAP versions. The SAP-based solution is compatible with SAP ECC 4.7 and above, SAP Business Technology Platform (BTP), SAP R/3, and SAP S/4HANA. In addition, SNI provides ERP-independent solutions designed to integrate with any ERP environment used by clients.
FAQs About e-Invoicing Spain
Is e-Invoicing mandatory in Spain?
Electronic invoicing is currently mandatory in Spain only for Business-to-Government (B2G) transactions. Since 2015, suppliers issuing invoices to Spanish public authorities must submit electronic invoices through the official FACe platform using the Facturae structured format.
For Business-to-Business (B2B) transactions, e-invoicing is not yet mandatory as of 2026. Spain plans to introduce mandatory B2B e-invoicing under Law 18/2022 (the “Crea y Crece” Law), but the final implementing regulation has not yet been published. Therefore, the exact go-live dates and technical obligations are not fully confirmed. Current expectations indicate a phased implementation starting with large companies followed by small and medium-sized enterprises, but these timelines remain subject to official confirmation.
Who is obliged to use e-Invoicing in Spain?
At present, any company or self-employed professional issuing invoices to Spanish public administrations must use electronic invoicing. This obligation applies regardless of company size when supplying goods or services to government entities.
Under the upcoming B2B framework, all businesses established or operating in Spain are expected to fall within scope once the regulation becomes effective. The mandate is expected to apply progressively, although final scope definitions and thresholds have not yet been officially confirmed.
How to generate e-Invoices in Spain?
A fully definitive process for generating B2B e-invoices in Spain cannot yet be provided, as the final implementing regulation under the Crea y Crece Law has not been published. Therefore, the exact technical workflow for B2B e-invoicing remains officially unconfirmed.
Authorities have confirmed that invoices will need to be generated in a structured electronic format aligned with European standards (EN 16931). Beyond this requirement, the precise generation method, platform workflow, and validation steps are not yet finalized.
Are there any penalties for non-compliance with e-Invoicing in Spain?
For B2G transactions, non-compliance results in practical enforcement rather than traditional penalties. Public authorities do not accept non-electronic invoices, meaning suppliers cannot receive payment unless invoices are submitted correctly through the electronic system.
For the upcoming B2B obligation, the penalty framework has not yet been fully defined because the implementing regulation has not been finalized.
What software solutions are available for e-Invoicing in Spain?
For B2B e-invoicing in Spain, the final technical framework is not yet fully defined, as the implementing regulation under the Crea y Crece Law is still pending.