SII – Spain's Realtime VAT reporting system
The Sistema Inmediato de Información (SII, Inmedate Suply of Information) is Spain’s real-time VAT reporting system. It requires businesses to submit VAT records electronically to the Tax Agency (AEAT)
How mandatory SII reporting will impact business in Spain
key implementation dates
Keep track of key dates and eInvoicing mandates in Spain
01/07/2017
Since July 1, 2017, SII reporting (Suministro Inmediato de Información) has been mandatory for large taxpayers with annual billing over 6 million EUR in Spain.
Spain's SII Overview
Implementation
July 2017 for large company taxpayers (annual turnover exceeding 6M EUR), VAT Groups, and entities under REDEME (Monthly VAT Refund Register)
Tax Authority
Agencia Estatal de Administración Tributatia (AEAT, Spanish Tax Agency)
Format
Specific structured XML format defined by the AEAT
Digital Signature
Certified digital signature (firma electrónica certificada) is mandatory for submitting VAT-related information through the Suministro Inmediato de Información (SII) system in Spain.
Archiving
Businesses must keep SII-related XML files and VAT records for at least 6 years from the end of the tax period
Other spanish regulations
Want to see how Code10 can help your SAP system comply with SII requirements in Spain?
Frequently asked questions
Which businesses can voluntarily adopt the SII system?
Although SII is mandatory for large taxpayers, VAT groups, and REDEME entities, any business registered for VAT in Spain can voluntarily adopt the system to benefit from streamlined VAT reporting and faster VAT refunds.
How often do businesses need to submit VAT records under SII?
Businesses using SII must submit invoice records within 4 calendar days of issuance or receptions (excluding weekends and public holidays). Special deadlines apply to certain transactions, such as intra-community operations.
What type of invoice data must be reported to AEAT under SII?
Companies must submit issued and received invoices, simplified invoices (tickets), intra-community transactions, and certain investment gold transactions, ensuring complete transparency in tax reporting.
Does the SII replace traditional VAT returns?
No, SII does not replace VAT returns, but it prefills VAT declarations by automatically collecting realtime invoice data. Businesses must still review and submit their periodic VAT returns.
Can businesses correct errors in submitted SII records?
Yes, companies can modify or cancel invoice records after submission by resending the corrected data with a specific modification code, ensuring tax authorities have accurate records.
Does the SII apply to non-resident companies operating in Spain?
Yes, if they are VAT-registered in Spain and meet the mandatory requirements (large taxpayers, VAT groups, or REDEME entities). Other non-resident businesses can also opt in voluntarily.
Our Strategy for SAP Integration and SII VAT Compliance
The implementation of the mandatory Suministro Inmediato de Información (SII) in Spain represents a significant shift for VAT-registered companies operating in the domestic market. Businesses are required to submit electronic invoice records compliant with the AEAT standards within strict four-day deadlines. This means that ERP systems must be capable of generating, validating and transmitting compliant tax data in a fully automated and secure way.
Code10 supports companies in meeting these requirements by combining SAP standard functionality with advanced eCompliance integration through our eCompliance Hub. We emphasize the use of SAP’s native features while implementing additional enhancements when needed to address regulatory complexities. Our approach ensures structured record generation, format validation and secure transmission through certified communication protocols, enabling organizations to meet Spanish SII obligations efficiently and with full technical reliability.
