Spain’s 2026 E-Invoicing Regulations Explained: Scope, Deadlines, and Penalties

At a glance: Spain’s e‑invoicing regulations

Scope: Mandatory e‑invoicing for domestic B2B transactions under Ley Crea y Crece between companies and professionals established in Spain; B2C and cross‑border transactions currently out of scope for e‑invoicing 
Tax authority: Agencia Estatal de Administración Tributaria (AEAT) 
Model: Hybrid Continuous Transaction Controls (CTC) architecture combining private platforms with a public AEAT solution 
Format: Structured invoice data compliant with EN 16931 transmitted to AEAT’s public solution; CII, UBL, EDIFACT and Facturae may be accepted between private platforms 
Electronic signature: Authenticity and integrity must be ensured through compliant technical mechanisms, which may include electronic signatures where appropriate 
Legal archiving period: Invoices must be stored in their original electronic format in line with Spanish tax law 
Penalties: Enforcement and penalty provisions will be confirmed in the final Ministerial Order. 
Key dates:

• 24 March 2026: Royal Decree adopted establishing the legal framework for mandatory B2B e-invoicing (final numbering and technical annex subject to publication)
• 1 October 2026 (expected): Ministerial Order takes effect, triggering compliance countdown
• 1 October 2027: Large companies (over €8M turnover) go live
• 1 October 2028: All other in‑scope businesses go live

Spain’s digital VAT evolution and e‑invoicing mandate

Spain is moving towards a digital VAT control environment, with e‑invoicing becoming a central pillar of its compliance strategy. Under new regulation Ley Crea y Crece, structured e‑invoicing will become mandatory for domestic business‑to‑business (B2B) transactions, with a proposed phased rollout expected to begin in October 2027.

This mandate builds on Spain’s existing real‑time VAT reporting infrastructure, including SII (Suministro Inmediato de Información), which has been live since 2017 for large taxpayers. Alongside Crea y Crece, Spain is also introducing Verifactu, a billing software certification obligation that regulates how invoices are generated.

Overall, these initiatives reflect Spain’s broader objective: increasing transparency, preventing fraud, and extending near real‑time visibility across the invoice lifecycle. A central policy goal is reducing Spain's average B2B payment period of approximately 80 days — well above the 60-day legal maximum — by introducing transparency through structured invoicing and status reporting.

What is the e‑invoicing legal framework in Spain?

Spain’s e‑invoicing framework applies to domestic B2B transactions where both issuer and recipient are established in Spain. The obligation is introduced in phases, with large companies entering scope from 1 October 2027 and all remaining taxpayers following from 1 October 2028.

Spain's model follows a hybrid architecture. Invoices must be exchanged between trading partners through compliant private e-invoicing service providers or the public AEAT solution. Regardless of channel chosen, a structured invoice data compliant with EN 16931 must be transmitted to AEAT's public solution, which supports interoperability, traceability, and invoice status reporting across the ecosystem. In addition, recipients are required to report the status of e‑invoices, including payment or rejection, within timelines defined in the final technical specifications.

Authenticity and integrity controls must be ensured through compliant technical mechanisms, which may include electronic signature methods where applicable. Accepted invoice formats include UBL (EN 16931) for reporting to AEAT, while CII, UBL, EDIFACT, and Facturae may be used between platforms. Invoices must be archived in their original electronic format in accordance with Spanish tax law. 

At launch, certain transactions remain out of scope for mandatory e‑invoicing, including B2C, cross‑border transactions. Future scope expansion may follow broader EU digital VAT developments.

Spain’s three‑track compliance landscape: Crea y Crece, Verifactu, and SII

Spain’s e‑invoicing mandate does not operate in isolation. Most businesses will be impacted by more than one obligation.

Crea y Crece governs how B2B invoices are issued and exchanged. Verifactu regulates how invoices are generated at the software level, requiring compliant billing software capable of generating secure, traceable and verifiable invoice records. SII focuses on near real‑time VAT reporting for issued and received invoices.

Each obligation has a different scope, timeline, and technical focus, but together they form a single compliance picture. Businesses must assess their exposure across all three to ensure end‑to‑end compliance.

What businesses need to have in place before go‑live

Before participating in Spain’s e‑invoicing framework, businesses must ensure several prerequisites are met. These include a valid Spanish VAT registration (NIF), an agreement with a private e‑invoicing platform capable of routing invoices and submitting faithful copies to AEAT, and a valid digital certificate for tax authority submissions. ERP and billing systems must be able to generate UBL EN 16931‑compliant output. During initial transition phases, issuers may be required to provide human-readable invoice representations (e.g. PDF) depending on recipient readiness.

Vertex e‑Invoicing for Spain’s new mandate can support your transition and reduce compliance risk.