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.

Regulatory Framework: Ley Crea y Crece and Verifactu

The principal legal instruments governing electronic invoicing in Spain are:

Ley 18/2022 of 28 September (Ley Crea y Crece), Article 12: establishes the mandatory B2B electronic invoicing obligation and its phased implementation. The Law empowers the Ministerio de Hacienda to specify technical requirements and implementation timelines through a Reglamento.

Reglamento de Facturación (Real Decreto 1619/2012): existing invoicing content requirements — supplier and buyer identification, invoice number and date, description, taxable base, tax rate, tax amount — remain applicable and must be embedded in electronic formats. The new Verifactu technical requirements supplement (not replace) the existing Reglamento.

Verifactu Sistema: the AEAT’s real-time invoice verification system, which registers a digital fingerprint (huella) for each invoice at the point of issuance. This creates an immutable audit trail linking every invoice to its AEAT registration, significantly restricting undetected invoice manipulation — a priority enforcement area following the Ley Antifraude (Law 11/2021).

Law 25/2013 (Electronic Invoicing to the Public Administration): B2G electronic invoicing via FACe in FacturaE format (XAdES XML). Mandatory since 2015 for large suppliers and 2018 for all public-sector suppliers. Operates independently of the Ley Crea y Crece B2B mandate.

Sectors Most Affected

Retail and distribution: high-volume invoicing chains requiring ERP/POS upgrades. Compatibility with buyer procurement systems must be verified before mandate entry into force.

Professional services: typically simpler invoicing volumes, but many clients are public-sector entities requiring B2G compliance. Simultaneous B2G and B2B compliance management.

Construction and real estate: high-value invoicing with subcontracting chains. AEAT has specific focus on construction for VAT compliance. Reverse-charge VAT (Art. 84.1.2f LIVA) documentation requirements apply.

Manufacturing and industrial: invoicing to B2B and B2G clients, often in international supply chains requiring compatibility with European EN 16931 and global EDI standards.

Company Size Segmentation

Autónomos and microenterprises (Phase 2, 2026): primarily a software upgrade. Low-cost SaaS solutions (Holded, Billin, Contasimple) are expected to offer Verifactu compliance. The change is largely software-driven for simple invoicing profiles.

SMEs with ERP systems: the complexity is in the ERP upgrade path. Many mid-market ERPs have Verifactu roadmaps; timing of module availability and testing must be planned now. Implementation, testing, and parallel running require 3–6 months lead time.

Large companies (Phase 1, EUR 8M+ turnover): already operating SII for VAT reporting. Electronic invoicing is an extension of existing digital tax infrastructure. The specific challenge is integrating Verifactu fingerprint generation into the invoice creation workflow compatible with existing SII submission.

Worked Example: ERP Migration for an Engineering SME

A Spanish engineering firm (65 employees, EUR 9.8 million revenue) was Phase 1 in-scope. Its legacy on-premises ERP (implemented 2015) had no Verifactu roadmap.

BMC’s advisory: gap assessment confirmed the ERP was not upgradeable. Two options evaluated: middleware layer vs cloud ERP migration. Decision: Holded cloud migration (4-month timeline including parallel running). B2G: 6 public-sector clients on FACe — all integrated and tested. Process automation: AP redesigned with automated invoice booking. Time saving: 12 hours/month. Total implementation cost: EUR 22,000. Annual process automation saving: EUR 8,400.

Common Mistakes We Fix

1. Waiting until the deadline to start. ERP upgrades and migrations take 3–6 months. Beginning the month before the mandate enters into force guarantees non-compliance on day one.

2. Assuming the existing ERP is compliant without checking the vendor’s roadmap. Many widely-used SME accounting systems have not yet committed to Verifactu timelines.

3. Not reviewing supplier invoicing capabilities. A company compliant in outgoing invoicing that cannot accept compliant invoices from suppliers may be unable to deduct input VAT on non-compliant received invoices.

4. Treating B2G and B2B as the same obligation. FACe (B2G) and the new B2B electronic invoicing operate on different technical standards, platforms, and submission procedures. B2G compliance does not equal B2B compliance.

5. Not training staff. Accounts payable and receivable staff must understand the new process, the rejection procedure for non-compliant invoices received, and the electronic archiving requirements.

How We Work

Compliance assessment (2–3 weeks): review of current invoicing systems, determination of applicable Phase and deadline, ERP upgrade path analysis, B2G compliance status, and a written implementation plan with timeline and cost estimate.

Implementation support: project management of ERP upgrade or migration, vendor coordination, AEAT specification testing, parallel running, and staff training. Available as a fixed-fee project or as part of our outsourced accounting service.

Geographic Coverage

Our electronic invoicing compliance practice operates across all of Spain. Key geographic dimensions:

Madrid: the AEAT Central Electronic Invoicing Unit (which supervises Verifactu compliance) and the Ministerio de Hacienda Digital Transformation directorate are based in Madrid. Our Madrid team engages directly with AEAT representatives on technical compliance questions for clients with complex invoicing systems.

Málaga and Costa del Sol: significant concentration of international businesses and tech companies requiring electronic invoicing implementation with multilingual supplier and customer communication. The Málaga Tech Park companies often have international supplier chains requiring compatible electronic invoice formats (EN 16931 European standard alongside FacturaE for Spanish public sector clients).

Pan-Spain: for companies with operations across multiple Spanish provinces, we coordinate electronic invoicing compliance centrally. Supplier and customer communication templates are prepared in Spanish and English. For companies with non-Spanish public sector clients (through European procurement), we advise on the specific electronic invoicing formats required by each Member State’s public procurement platform.

Integration with Tax Compliance and Accounting

Electronic invoicing compliance is most efficiently implemented as part of a broader tax and accounting modernisation:

SII integration: companies already in the SII (Suministro Inmediato de Información) regime — those with turnover exceeding EUR 6 million or part of large VAT groups — have already implemented electronic tax data submission infrastructure. The Verifactu fingerprint requirement is an addition to, not a replacement for, SII. We integrate the two obligations into a single data flow.

Accounting automation: electronic invoicing adoption enables automatic posting of invoices to the accounting system (eliminating manual data entry), reducing month-end close time. For companies using outsourced accounting services, the electronic invoice feed directly into the accounting system replaces the manual document upload process.

VAT compliance: the VAT impact of non-compliant invoices — both issued and received — is material. Our tax compliance team reviews invoicing procedures as part of the annual VAT health check, identifying both electronic invoicing compliance gaps and substantive VAT deductibility risks arising from format non-compliance.

For autónomos and microenterprises using our accounting service, the electronic invoicing compliance is managed as part of the quarterly filing cycle — clients do not need to manage Verifactu technical requirements directly.

Common Mistakes We Fix

1. Waiting until the mandate deadline to start implementation. ERP upgrades, software migrations, and testing cycles require 3–6 months minimum. Companies starting the process in the month before the mandate enters into force will not be compliant on day one.

2. Assuming the existing ERP is compliant without verifying the vendor’s roadmap. Many widely-used SME accounting systems have not yet committed to Verifactu compliance timelines. Discovering this two months before the deadline, when migration is no longer feasible in the available time, is the most common avoidable crisis.

3. Not reviewing supplier invoicing capabilities. Electronic invoicing requires both sender and receiver to be compliant. A company compliant in outgoing invoices that cannot accept electronic invoices from suppliers may be unable to deduct input VAT on non-compliant received invoices — a material VAT contingency.

4. Treating B2G and B2B as the same obligation. FACe (B2G) and the new B2B electronic invoicing operate on different technical standards, platforms, and submission procedures. Companies already compliant with B2G are not automatically B2B-compliant.

5. Not training accounts payable and accounts receivable staff. The process change requires training on the new system, the rejection procedure for non-compliant invoices received, and electronic archiving requirements — invoices must be stored in their original digital format, not converted to PDF or printed, for the period required for AEAT inspection purposes (generally four years from the filing of the relevant tax return).