Why Slovakia Chose Peppol Over a Government Clearance System

What happened to Slovakia's national platform?

Slovakia had been developing its own government-operated e-invoicing platform, known as IS EFA (Information System for Electronic Invoicing). The platform was part of a broader push to digitise public sector procurement and was initially intended to handle B2G transactions before expanding to cover B2B.

In 2024, the Slovak government cancelled the EFA proposal. Rather than continuing with a bespoke national system, Slovakia decided to adopt the Peppol network for both B2G and B2B e-invoicing. The cancellation was not widely publicised at the time, but the Financial Administration confirmed it in its expanded FAQ guidance published in March 2026.

The result is Law 385/2025 Z.z., which amends the Slovak VAT Act and makes B2B e-invoicing via Peppol mandatory from 1 January 2027. It is one of the first national laws to explicitly reference the ViDA Directive (EU 2025/516).

Why did Slovakia choose Peppol?

Building a national clearance platform is expensive, slow, and carries real delivery risk. Poland's KSeF system took years of development and multiple deadline postponements before going live. Italy's SDI required significant ongoing investment. For a country of Slovakia's size, the cost-benefit calculation looks different.

Peppol offered a ready-made infrastructure. The network already handles cross-border e-invoicing across Europe, the technical standards (EN 16931, UBL 2.1, CII) are well established, and there is an existing ecosystem of certified Access Point providers. Slovakia could adopt the network without building, hosting, or maintaining a central platform.

The 5-corner model also gave Slovakia a way to get tax visibility without pre-clearance. In a clearance system, the government must approve every invoice before it reaches the buyer, which creates a bottleneck. Under Slovakia's model, invoices flow freely between trading partners via the Peppol network, and the tax authority receives reporting data separately through corner 5. No invoice is held up waiting for government validation.

How does Slovakia's 5-corner model work in practice?

The standard 4-corner Peppol model connects a sender and receiver through their respective Access Points. Slovakia adds a fifth corner: the tax authority. Accredited service providers, referred to as Digital Postmen in the Slovak framework, are responsible for exchanging invoices and for generating a Tax Data Document (TDD) that is reported to the Financial Administration.

The Peppol Authority for Slovakia is Financne riaditelstvo SR (the Financial Directorate). Digital Postmen must hold an EU registered office, pass criminal record checks, and complete Peppol Testbed testing before they can operate. The accreditation requirements were published in January 2026, with voluntary testing starting in spring 2026 ahead of the January 2027 mandatory deadline.

From the business's perspective, the process is straightforward. You connect to the Peppol network through a Digital Postman, send and receive invoices in EN 16931 XML format (UBL 2.1 or CII syntax), and your provider handles the tax reporting. PDF and EDIFACT are not accepted as valid e-invoices. For the full technical and compliance picture, see the Slovakia e-invoicing guide and the Slovakia country page.

What happens to the VAT control statement?

Slovakia's existing VAT control statement (kontrolny vykaz) and summary report will remain in effect until 1 July 2030. After that date, invoice data will be reported automatically through the e-invoicing system in near-real time, making the periodic filing redundant.

This is the main long-term payoff of the 5-corner model. Once the reporting infrastructure is mature, the tax authority receives transaction data continuously rather than in batch filings. For businesses, this means one less compliance obligation. For the government, it means faster detection of discrepancies and a smaller VAT gap.

The transition period is generous. Businesses have over three years between the mandatory e-invoicing start date (January 2027) and the kontrolny vykaz sunset (July 2030) to ensure their systems are producing accurate, complete data through the Peppol channel.

What are the penalties for non-compliance?

Law 385/2025 Z.z. sets fines of up to EUR 10,000 per infraction for failure to report data, submitting incorrect data, or reporting after the deadline. Repeated violations can attract fines of up to EUR 100,000. However, no fine is imposed if an obvious error is identified and corrected promptly.

There is also a specific defence for service provider failures. If a business can demonstrate that its contracted Digital Postman experienced a technical failure, and the data were reported without delay once the issue was resolved, no penalty applies. This is a pragmatic acknowledgement that in a decentralised model, the reliability of third-party providers matters.

What can other EU countries learn from Slovakia?

Slovakia's decision matters because it provides a working example of an alternative to the clearance model that several larger EU countries have adopted. Not every member state has the budget or institutional capacity to build and operate a national invoice platform. The Peppol 5-corner model offers a lighter-weight path that still delivers real-time tax visibility.

Belgium is heading in the same direction, planning to add e-reporting through the 5-corner model by 2028 on top of its existing Peppol B2B mandate. If both Belgium and Slovakia demonstrate that the model works at scale, it could become the default choice for medium and smaller EU member states looking to meet their ViDA obligations without building from scratch.

The ViDA Directive requires all member states to support digital reporting for intra-EU B2B transactions by July 2030, with domestic alignment by January 2035. Countries that have not yet chosen an architecture are watching early movers closely. Slovakia's pivot from a national platform to Peppol, and Belgium's incremental build on top of existing infrastructure, both suggest that the 5-corner model will play a larger role in the EU's e-invoicing future than many initially expected.