Peppol Country Guide · Slovakia
Mandatory B2B E-Invoicing from 1 January 2027
Slovakia is adopting a fully decentralised Peppol architecture. Every business will need a certified Digital Postman. Every software vendor serving the Slovak market needs to be connected and tested before the deadline hits.
Overview
What the Slovak Mandate Requires
Slovakia's B2B e-invoicing mandate is established under Law 385/2025 Z.z., which amends the Slovak VAT Act and implements the EU ViDA Directive (2025/516).
The law was approved by the Slovak National Council on December 9, 2025.
From January 1, 2027, all VAT-registered Slovak businesses must issue and receive structured electronic invoices for domestic B2B transactions via the Peppol network. PDF invoices will no longer be legally valid for in-scope transactions.
Key distinction: Slovakia is not building a centralised clearance platform like Italy's SDI or Poland's KSeF. Invoices flow peer-to-peer through the Peppol network, with no government pre-approval and no central bottleneck. The tax authority receives a reporting copy asynchronously via Corner 5.
The Peppol Authority for Slovakia is Financné riaditeľstvo SR, the Financial Directorate of the Slovak Republic. Accredited service providers are referred to in Slovak legislation as "Digital Postmen", the Peppol Access Points of the Slovak market.
The 5-Corner Model
How Invoice Exchange Works in Slovakia
Slovakia uses the standard Peppol 5-corner architecture. Each business connects to the network through their own accredited Digital Postman.
The invoice flows from sender → sender's Digital Postman (Corner 2) → Peppol network → receiver's Access Point (Corner 3) → receiver. Simultaneously, the sender's Digital Postman generates a Tax Data Document (TDD) and reports it to the Financial Directorate at Corner 5.
For software vendors, your integration point is Peppol, not a government API. If you're already connected to Peppol in other markets, Slovakia is an extension of existing infrastructure.
Implementation Timeline
Slovakia E-Invoicing Rollout, 2024 to 2030
B2G rollout begins via IS EFA platform
Voluntary B2B testing opens. Accreditation requirements published
Voluntary phase expands. Connect and test now
Corner 5 digital reporting environment available
B2B MANDATORY, penalties apply from this date
EU ViDA platform economy obligations
EU ViDA cross-border DRR.
Invoice Format Requirements
What Format Must Slovak E-Invoices Use?
Slovakia requires structured XML invoices conforming to the EN 16931 European standard. Two syntaxes are accepted: UBL 2.1 and CII (ISO 19005).
PDF invoices, EDIFACT, and unstructured XML are not valid under Slovak law from January 2027. If your platform currently generates PDFs for Slovak customers, adding EN 16931 XML output is typically the longest lead-time item in a compliance project, so start now.
Recipients are identified by their DIC (Slovak tax ID) in the PASR registry, which is how the Peppol network resolves the correct receiving endpoint for each invoice.
Characteristics
E-Invoicing in Slovakia at a Glance
Key facts every software vendor and compliance team needs to know before building for the Slovak market.
All domestic B2B transactions must use structured e-invoices via Peppol from this date. No grace period, penalties apply immediately.
Decentralised 5-corner Peppol model. No centralised government clearance platform. Invoice delivery is peer-to-peer via accredited Access Points.
EN 16931 is the European semantic standard for e-invoicing. Invoices must be structured XML using UBL 2.1 or CII syntax. PDFs are not valid e-invoices.
Invoices must be issued within 15 days of the tax point. Received invoices must be reported within 5 days. Build these windows into your workflow logic.
E-invoices must be retained for 10 years (standard), or 20 years for transactions involving immovable property. Archiving abroad is permitted.
Up to €10,000 per infraction for late or incorrect reporting. Up to €100,000 for repeated violations. AP failure defence applies if data is reported promptly after resolution.
Financné riaditeľstvo SR (Financial Directorate of the Slovak Republic) is the appointed Peppol Authority. Accredits Digital Postmen and operates Corner 5 reporting.
Receivers are identified by their DIC (Slovak tax ID) in the PASR registry. Your platform must resolve DIC to a Peppol endpoint before sending any invoice.
All domestic B2B and B2G transactions for VAT-registered businesses. B2C is entirely excluded. No size threshold, applies to all in-scope entities from day one.
Frequently Asked Questions
Slovakia E-Invoicing: Key Questions
No. Businesses and software vendors do not need to become accredited Digital Postmen themselves, you need to connect to one. A Digital Postman must hold an EU-registered office, pass criminal record checks, complete Peppol Testbed testing, and be formally accredited by the Financial Directorate. For software vendors, the practical path is to integrate via a pre-accredited Access Point provider's API. Arratech handles network routing, TDD generation for Corner 5, and ongoing compliance updates, so you connect once and we maintain the accreditation.
Slovakia has implemented a 5-corner model, which means that your existing Peppol infrastructure covers the fundamentals. What Slovakia adds on top is local accreditation process, tax reporting and some other intricacies covered below.
The Slovak-specific requirements are local accreditation by the Financial Directorate (FR SR), Corner 5 tax reporting (a near-real-time data submission to the Slovak tax authority for every invoice), and DIC registry lookups to resolve Slovak receiver endpoints. Each of these has nuances, and the technical specifications are still being finalised ahead of January 2027.
The practical question is whether you build and maintain those additions yourself, or connect via a provider already accredited and operating in the Slovak market. Working with an accredited Digital Postman like Arratech means the Corner 5 reporting, FR SR accreditation, and registry lookups are handled on your behalf. Your integration stays at the Peppol level you already know. Slovakia becomes a configuration step, not a compliance project.
The voluntary testing environment is open now. The vendors who are live and tested before the deadline are the ones who started the conversation in 2026.
No. Slovak law includes an explicit Access Point failure defence. If it can be demonstrably proven that the contracted accredited service provider experienced a technical failure, no penalty applies, provided the invoice data were reported without delay once the issue was resolved. This protects businesses but puts real pressure on Access Point providers to maintain high availability and fast incident resolution. Arratech maintains EU-hosted infrastructure and communicates proactively on any incident to protect your customers' compliance position.
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