Mandatory E-Invoicing in Spain: Get Your Business Compliant with Verifactu

Electronic invoicing (facturación electrónica) in Spain is the obligation to issue and transmit invoices in a structured digital format for all B2B transactions between businesses and professionals with a tax domicile in Spain, introduced by Law 18/2022 (Ley Crea y Crece) and technically specified by Royal Decree 1007/2023. The regulation establishes two compliance paths: the Verifactu system, which transmits invoice records to the AEAT (Spanish Tax Agency) in real time with a cryptographic verification code, and the SIF (Invoicing Information System), which retains records internally for on-request inspection. Non-compliance carries penalties of up to EUR 10,000 per infringement, and invoices that fail to meet required formats may be rejected by recipients, preventing input VAT deduction.

Electronic invoicing is moving from an option to a legal obligation with specific dates and real penalties. Law 18/2022 (Ley Crea y Crece) and Royal Decree 1007/2023 establish the regulatory framework; what your business needs is to understand exactly what applies to it, within what timeframe, and what technical and operational changes are required to comply without disrupting normal operations.

The regulatory framework: Ley Crea y Crece and the Verifactu system

Law 18/2022, on the creation and growth of companies, introduced in its Article 12 the obligation to issue and transmit electronic invoices in all transactions between businesses and professionals (B2B) with tax domicile in Spain. This obligation, pending regulatory development, was specified by Royal Decree 1007/2023, which establishes the technical requirements for the Verifactu system and the Invoicing Information System (SIF).

The Verifactu system is the control mechanism developed by the AEAT: businesses adopting it must use software that generates a secure verification code (CSV) on each invoice, cryptographically chains the invoicing records, and transmits the information to the AEAT in real time or near-real time. The SIF is the alternative for those who prefer to retain records internally and make them available to the AEAT only on request. Both options are valid; the choice has operational and tax authority relationship implications.

What your business needs to do before the deadline

Adapting to electronic invoicing is not purely a technology problem, even though technology is the starting point. It is a process that affects invoicing operations, internal approval workflows, relationships with clients and suppliers, and accounting systems. Companies that address it late find that their software provider does not yet have the update ready, that their clients are already demanding the new format, or that the migration of historical data generates unforeseen problems.

The first step is to understand whether your company is obligated, within what timeframe, and under which technical modality. The second is to audit the current software: is your ERP or invoicing programme on an approved Verifactu development roadmap? Is the update available or does it require migration? The third is to design the implementation plan with sufficient margin for testing and team training before the deadline.

B2G electronic invoicing: the obligation that already exists

If your company invoices public bodies (central government, regional governments, local authorities, or public sector entities), the obligation to invoice electronically has existed since 2015 under Law 25/2013 on the promotion of electronic invoicing and creation of the accounting invoice register in the public sector. Invoices must be transmitted through FACe (the General Entry Point for Electronic Invoices for the Central State Administration) or the corresponding regional platform, in FacturaE format (XML to standard). This obligation is independent and pre-dates the new B2B obligation under Ley Crea y Crece; complying with B2G does not exempt you from the new B2B obligation.

VAT and fiscal implications

Electronic invoicing has a direct impact on VAT compliance. An invoice that does not meet the required formal requirements has no validity for input VAT deduction purposes for the recipient, which can generate significant tax contingencies. The AEAT may deny input VAT deduction for received invoices that do not comply with the mandatory format, directly affecting the recipient’s cash flow. This shared responsibility — issuer and recipient — makes adaptation a bilateral interest in every business relationship.

Electronic invoicing implementation is typically coordinated with the outsourced accounting service to ensure consistency of the accounting flow, and with the process automation team when the business wants to use the change as an opportunity to digitalise the complete invoicing cycle (issuance, approval, bookkeeping and archiving). For businesses with complex tax compliance obligations, the adaptation is integrated into the annual tax planning process.

Electronic invoicing in Spain: the mandatory timeline

Electronic invoicing (factura electrónica obligatoria) is becoming mandatory for all Spanish businesses under the Reglamento que desarrolla la Ley 18/2022 (Ley Crea y Crece) and, for B2G (business-to-government) transactions, has been mandatory since 2015 for large suppliers and since 2018 for all suppliers to the public administration under the Sistema de Información Contable (SIC) requirements.

The Crea y Crece electronic invoicing mandate extends the obligation to B2B transactions on a phased basis:

• Phase 1 (from 2025): companies with annual turnover above EUR 8 million must issue and accept electronic invoices for all B2B transactions within Spain.
• Phase 2 (from 2026): all remaining businesses and freelance professionals must comply.

The Spanish electronic invoice standard is Factura-e (XAdES XML format) for public sector invoices and a range of formats for private sector compliance, subject to the Reglamento’s requirements for structured format, mandatory fields, and AEAT submission or notification.

The AEAT’s Verifactu and SII integration

Spain’s electronic invoicing mandate operates alongside two parallel AEAT digital reporting systems:

Verifactu (Sistema de Verificación de Facturas): a new system requiring that all invoices issued by in-scope taxpayers include a digital fingerprint (huella) that is registered with the AEAT in real time or near real time. This creates an immutable audit trail linking every invoice to its AEAT registration — significantly restricting the possibility of undetected invoice manipulation.

SII (Suministro Inmediato de Información): already mandatory for grandes empresas (turnover >EUR 6 million) and large VAT groups, SII requires electronic submission of invoice records to the AEAT within four calendar days of issue or receipt. SII is effectively a subset of the broader electronic invoicing mandate for businesses already within its scope.

Implementation requirements for businesses

Implementing electronic invoicing compliance involves:

1. Software assessment: determining whether existing accounting, ERP, or invoicing software supports Factura-e or the required structured format, and whether it can generate the Verifactu digital fingerprint and submit to AEAT.
2. Process redesign: reviewing the purchase-to-pay and order-to-cash processes to ensure that electronic invoices can be received, processed, and archived correctly.
3. Supplier and customer communication: notifying trading partners of the transition to electronic invoicing and confirming their technical readiness.
4. Archive compliance: electronic invoices must be stored in their original digital form (not converted to PDF) for the period required for AEAT inspection purposes (generally four years from the filing of the relevant tax return).

Our process automation and accounting teams support the technical and process implementation alongside the compliance advisory.

Contact our electronic invoicing team for an implementation readiness assessment.

Integration with accounting and ERP systems

Electronic invoicing is not an isolated compliance change — it is a forcing function for modernising the entire accounts payable and accounts receivable infrastructure. Businesses that treat it as a pure compliance requirement miss the opportunity to simultaneously implement process automation that reduces manual accounting effort, accelerates month-end close, and improves cash flow visibility through real-time invoice tracking. Contact our team for a combined electronic invoicing compliance and process optimisation assessment.