Fiscal subject related
General information
Slovakia has decided to introduce a central e-invoicing system called Informačný Systém Elektronickej Fakturácie (IS EFA).
Pursuant to IS EFA – Technical outline, there are different modules in the e-invoicing setup:
- EFA Gateway: responsible for communication with the taxpayer ERP system, in particular, to allow receipt of supplier invoices.
- EFA Processing: responsible for processing electronic invoices.
- EFA Delivery: responsible for delivery of invoices to customers.
- Analytical System: responsible for performing checks on reported invoices.
- EFA User Application: responsible for generating electronic invoices and managing them.
- Invoice disclosure: responsible for invoice disclosure for B2G and G2G scenarios.
There are two main methods of entering invoices in the IS EFA system:
- Automatic upload directly from taxpayer ERP dedicated to medium and large taxpayers.
- Manual upload using EFA User Application dedicated to small taxpayers.
The implementation process of e-invoicing is divided into two phases:
- From January 2022, e-invoicing through IS EFA becomes mandatory in B2G, G2G, and G2B transactions.
- From January 2023, e-invoicing through IS EFA becomes mandatory for all other transaction types, including B2B scenarios.
Other news from Slovakia
Understanding the Digital Services Act
The Digital Services Act (DSA) is an EU regulation designed to ensure safer and more transparent online environments by imposing new responsibilities on digital service providers, including those outside the EU. It applies to a broad range of online platforms, with stricter obligations for very large platforms, but also key requirements for medium-sized businesses, such as EU representation, transparency, and content moderation reporting. Read more
New document was uploaded: 289-2008 Coll Act for cash registers (english translate)

This regulation represents a main fiscal regulation for fiscalization requirements in Slovakia. Read more
Slovakia adopts Peppol network for decentralized e-invoicing system.

Slovakia’s Financial Administration will serve as the national Peppol Authority, introducing a decentralized e-invoicing system based on the Peppol network, with legislation expected by summer 2025. Mandatory B2B e-invoicing and real-time reporting to tax authorities will begin in January 2027. The system enables structured invoice exchange via certified providers without buyer pre-approval, ensur... Read more
TLv6 Implementation Marks Significant Shift in EU’s Trust List Format
A new EU Trust List format, TLv6, will officially replace TLv5 in May 2025 as part of the updated eIDAS Regulation (EU 2024/1183). It introduces key technical changes like a new URI field, updated signature format, and optional phone number support. Organizations must update their systems to avoid signature validation failures and service disruptions, as TLv5 will no longer be valid once TLv6 take... Read more
Slovakia Prepares for Mandatory B2B Electronic Invoicing

Slovakia's Financial Administration is implementing mandatory B2B electronic invoicing through the decentralized Peppol network, aiming to fully digitize and standardize invoice processing and reduce manual intervention. This transition, utilizing a secure pan-European XML format, promises cost savings, improved security, and streamlined business procedures. The Financial Administration of Slovaki... Read more
VIDA regulation adopted—what does that mean for business?
The EU adopted the VAT in the Digital Age (ViDA) package on March 11, 2025, introducing major changes to the VAT system starting January 1, 2027. Key reforms include mandatory digital VAT reporting by 2030, new VAT collection rules for online platforms, and expanded One-Stop Shop (OSS) registration to simplify cross-border compliance. Additional measures, such as mandatory e-invoicing, phasing out... Read more
New document was uploaded: S4F backoffice patch
S4F backoffice patch is intended for users who have already installed S4F backoffice and are intended to update existing installations to latest version. To do so apply only patches that are marked with version number that is newer than your currently installed instance of backoffice. Read more