Slovakia’s transition to mandatory electronic invoicing represents a fundamental transformation in how businesses issue, exchange, and report invoices. The Slovakia e-invoicing mandate, effective from January 1, 2027, introduces structured electronic invoicing combined with transaction-level digital reporting, marking a clear shift toward continuous transaction controls (CTC).
The framework is expected to follow a Peppol-based 5-corner model, enabling seamless invoice exchange between trading partners while ensuring near real-time reporting to the Slovak tax authority through the national e-invoicing system. This system builds on the existing Informačný systém elektronickej fakturácie (IS EFA) framework and is expected to evolve in line with EU requirements.
This reform aligns Slovakia with broader EU digital VAT initiatives and strengthens its position within the evolving landscape of e-Invoicing in Europe.
Invoicing Regulation Overview
On December 19, 2025, Law No. 385/2025 Z.z. was published following approval by the National Council of Slovakia. The law amends the Slovak VAT Act as well as several related acts, including the Tax Code and the Act on Guaranteed Electronic Invoicing and the Central Economic System. These amendments introduce mandatory structured e-invoicing and digital reporting through a phased approach aligned with the EU’s VAT in the Digital Age (ViDA) Directive (EU 2025/516).
The objective of the Slovak reform is to improve VAT transparency, reduce administrative burden, enable near real-time reporting, and prepare the country for harmonized cross-border e-invoicing within the EU.
Is e-Invoicing Mandatory in Slovakia?
Yes, under the Slovakia e-invoicing mandate, electronic invoicing will become mandatory starting from January 1, 2027 for specific transaction types.
The scope includes:
- Slovakia e-invoicing B2B transactions between domestic VAT-registered businesses
- Domestic B2G transactions involving public sector entities
B2C transactions are currently excluded. Certain exemptions also apply, including transactions involving classified information or specific government bodies.
All Slovak VAT-registered taxpayers must be capable of issuing and receiving structured electronic invoices through compliant delivery channels connected to the national e-invoicing system.
Slovakia e-Invoicing Requirements
To comply with the Slovakia e-invoicing requirements, businesses must meet both technical and operational obligations.
Key requirements include:
- Use of structured invoice formats compliant with EN 16931
- Structured formats compliant with EN 16931 are required, with UBL 2.1 expected to be the primary syntax.
- Transmission of invoices via accredited service providers (Peppol Access Points / Digital Postmen)
- Capability to send and receive invoices electronically
- Alignment with reporting requirements defined by the Slovak tax authority
Invoices must be issued in structured XML format to ensure interoperability and compliance with EU standards.
Transmission Model and National e-Invoicing System
Slovakia is expected to adopt a decentralized delivery model based on Peppol infrastructure. In this model, certified service providers, referred to as “Digitálny poštár” (Digital Postmen), act as intermediaries facilitating invoice exchange.
These providers:
- Deliver invoices securely to recipients
- Enable interoperability between trading partners
- Transmit required invoice data to the Slovak tax authority in accordance with national system specifications
The system builds on the existing Informačný systém elektronickej fakturácie (IS EFA) framework, which is expected to evolve as part of the broader national e-invoicing architecture aligned with EU ViDA requirements.
Slovakia e-Invoicing Timeline
2026
- Voluntary onboarding and testing phase for businesses and service providers
January 1, 2027
- Mandatory e-invoicing and transaction-level digital reporting for domestic B2B and B2G transactions
Until June 30, 2030
- Invoice issuance deadline: within 15 days from the tax point
- Reporting obligations:
- Outgoing invoices: at or near issuance
- Incoming invoices: within a defined reporting window (e.g. 5 days, subject to technical specifications)
From July 1, 2030
- Extension of the system to intra-EU cross-border transactions
- Reduction of invoice issuance deadline to 10 days
- Harmonization of reporting obligations
- Replacement of traditional VAT reporting tools (e.g. EC Sales Lists, Control Statements) with automated reporting via the e-invoicing system
How to Implement e-Invoicing in Slovakia?
To successfully comply with Slovakia electronic invoicing, businesses should take a structured implementation approach:
- Assess ERP Readiness
Ensure your ERP system can generate structured XML invoices. - Select a Certified Service Provider
Choose a Peppol Access Point (Digital Postman) capable of connecting to the Slovak national system. - Ensure Data Mapping Compliance
Align invoice data with EN 16931 and Slovak VAT requirements. - Prepare for Reporting Requirements
Implement processes to support near real-time reporting as defined by the tax authority. - Participate in the 2026 Testing Phase
Use the voluntary phase to validate integrations and ensure compliance readiness. - Train Internal Teams
Ensure tax, finance, and IT teams understand the new processes and obligations.
How can SNI help you about Slovakia e-Invoicing?
SNI’s Slovakia e-Invoicing solution enables businesses to generate invoices in the required structured format and exchange them seamlessly through accredited Peppol-based delivery services. Invoice creation, XML conversion, validation, and transmission processes can be fully automated within ERP Systems.
SNI’s end-to-end solution supports both outbound and inbound e-invoices. Outbound invoices are transmitted via certified service providers in line with Slovak regulatory requirements, while inbound invoices issued by suppliers are automatically retrieved and processed. All incoming invoices are displayed in SNI’s Inbound Cockpit, providing clear visibility in both XML and human-readable formats.
SNI’s reconciliation capabilities allow incoming invoices to be automatically matched with purchase orders, delivery notes, or internal records, reducing manual effort and improving accuracy. The solution integrates with SAP ECC, SAP S/4HANA, SAP BTP, and ERP-independent environments without requiring system upgrades, ensuring compliance with Slovakia’s e-invoicing mandate while maintaining operational continuity.