Italy E-Invoicing Guide: SDI System, FatturaPA & Compliance (2026)

What Is Italy's SDI E-Invoicing System?

The Sistema di Interscambio (SDI) is Italy's centralized electronic invoicing platform that routes all invoices between businesses and to the tax authority.

The Sistema di Interscambio (SDI) is Italy's centralized electronic invoicing platform that routes all invoices between businesses and to the tax authority. Unlike many countries still implementing e-invoicing, Italy has had a fully operational system since 2019, making it a global benchmark for CTC (Continuous Transaction Controls) compliance.

How Does the SDI Process Work?

The SDI operates as a clearance model where every invoice must be validated by the system before reaching the recipient:

The SDI operates as a clearance model where every invoice must be validated by the system before reaching the recipient:

• Invoice creation: The supplier generates a FatturaPA XML file (format version 1.2.2)
• Transmission to SDI: The invoice is sent via certified channels (PEC, SDICoop, SDIFTP, or web portal)
• Validation: SDI performs format, content, and authenticity checks within 5 days
• Delivery: Valid invoices are forwarded to the recipient via their registered channel
• Notification: Both parties receive delivery confirmations or rejection notices

Who Must Comply With SDI E-Invoicing in 2026?

As of 2026, virtually all businesses operating in Italy must use SDI:

As of 2026, virtually all businesses operating in Italy must use SDI:

What About Non-Resident Businesses?

Foreign companies with an Italian VAT number must either issue e-invoices through SDI or appoint a fiscal representative who handles SDI compliance on their behalf.

Foreign companies with an Italian VAT number must either issue e-invoices through SDI or appoint a fiscal representative who handles SDI compliance on their behalf. Since July 2022, the esterometro (cross-border reporting) was abolished — all cross-border B2B transactions involving Italian VAT-registered entities must now flow through SDI.

What Is the FatturaPA XML Format?

FatturaPA is Italy's mandatory e-invoice format, based on XML schema version 1. 2.

FatturaPA is Italy's mandatory e-invoice format, based on XML schema version 1.2.2. Key technical requirements include:

• XML Schema: Defined by the Agenzia delle Entrate with strict field validation
• Digital signature: XAdES-BES or CAdES-BES qualified electronic signature required
• Codice Destinatario: 7-character recipient code for B2B routing (or PEC email as fallback)
• File naming: Follows the pattern IT[fiscal code]_[progressive number].xml
• Attachment support: PDF copies can be embedded as base64 attachments

What Are the Penalties for SDI Non-Compliance?

Italy's penalty structure for e-invoicing violations is among the strictest in Europe:

Italy's penalty structure for e-invoicing violations is among the strictest in Europe:

• Non-issuance of e-invoice: 90–180% of the VAT amount related to the transaction
• Late or incorrect e-invoice: €250–€2,000 per violation
• Late transmission to SDI: Invoices must be transmitted within 12 days of issuance (immediate invoices) or by the 15th of the following month (deferred invoices)
• Voluntary correction (ravvedimento operoso): Penalties reduced to 1/9 if corrected within 90 days

How to Set Up SDI E-Invoicing (Step-by-Step)

Register on the Agenzia delle Entrate portal at ivaservizi. agenziaentrate.

1. Register on the Agenzia delle Entrate portal at ivaservizi.agenziaentrate.gov.it
2. Register your Codice Destinatario (recipient code) or PEC address for receiving invoices
3. Obtain a qualified digital signature certificate from an accredited provider
4. Choose a transmission channel: PEC, SDICoop (web service), SDIFTP (file transfer), or web portal
5. Configure your invoicing software to generate FatturaPA XML 1.2.2 format
6. Test with SDI's staging environment before going live

Which Software Supports Italian SDI E-Invoicing?

Invoicemonk supports Italian e-invoicing with automated FatturaPA XML generation, SDI transmission, and real-time delivery status tracking.

Invoicemonk supports Italian e-invoicing with automated FatturaPA XML generation, SDI transmission, and real-time delivery status tracking. Features include multi-currency support for cross-border invoicing, automated VAT calculation at Italy's four rates (22%, 10%, 5%, 4%), and built-in compliance checks to prevent rejection by the SDI system.