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E-Invoicing in Slovakia

Country Situation

General Description

Slovakia is actively advancing its digital tax infrastructure. Evolving from an optional framework into a rigorous statutory mandate, the Slovak government has implemented Law No. 385/2025 Z.z. to enforce mandatory electronic invoicing and simultaneous tax data reporting across both Business-to-Business (B2B) and Business-to-Government (B2G) transactions.

With strict deadlines approaching, persisting with legacy PDF invoices for commercial partners or relying on the retiring IS EFA portal for government billing will soon lead to severe financial penalties and substantial disruption to business operations. To allow enterprises sufficient time to upgrade their ERP and accounting systems to comply with the new unified Peppol standard, the Slovak Ministry of Finance has organized the implementation into two critical milestones:

1 January 2027: All VAT-registered businesses established in Slovakia must issue, transmit, and receive structured e-invoices for all domestic B2B and B2G transactions. Whether billing a commercial partner or a government entity, every transaction must be routed through an accredited Service Provider and accompanied by near real-time e-reporting (SK TDD) to the Financial Administration.

1 July 2030: All in-scope entities must extend their digital invoicing and reporting capabilities to encompass intra-EU cross-border transactions, ensuring strict alignment with the European ViDA directive.

Operating as a fully accredited Peppol Service Provider (Digital Postman) and a leading authority on global compliance mandates, ecosio integrates directly with your existing ERP infrastructure. We deliver a comprehensive, fully managed service, executing the necessary XML data translations, securely managing your Peppol network routing, and guaranteeing that your organization remains fully compliant with the latest regulatory shifts in Slovakia and throughout Europe.

FAQs

Can we still send PDF invoices via email to clients who are not ready for XML?
No. Starting January 1, 2027, PDF invoices sent via email will no longer be recognized as legally valid tax documents for domestic B2B transactions in scope. Both the sender and the receiver must exchange structured XML data (UBL 2.1 or CII) via the certified Peppol network. Sending a PDF will be treated as non-compliance, resulting in severe tax penalties and the buyer losing their right to deduct input VAT.
Are foreign companies with a Slovak VAT registration affected by this mandate?
Yes, if they have a fixed establishment in Slovakia. Under Law No. 385/2025 Z.z., the mandate applies to all VAT-registered entities established in the Slovak Republic. If your company is merely registered for VAT in Slovakia but has no physical or human resources constituting a permanent establishment there, your domestic transactions fall outside the January 2027 scope, but you will be impacted by the cross-border mandates taking effect on July 1, 2030.
What exactly is a "Digital Postman" and do we have to hire one?
A "Digital Postman" is the local term for an officially accredited Peppol Service Provider (Access Point) in Slovakia such as ecosio. Because Slovakia uses a decentralized 5-corner model, you cannot send invoices directly to the tax authority or your partners yourself. You are legally required to connect through a certified service provider like ecosio, who acts as your digital courier—securely routing your invoices to your clients and simultaneously declaring the required tax data to the government's Corner 5 endpoint.
Do we need to apply a Qualified Electronic Signature (QES) to our invoice payloads?
No, end-user or payload-level electronic signatures are not mandatory for structured B2B or B2G invoices in Slovakia. The Financial Administration recognizes that transmitting data through an accredited Peppol Service Provider inherently guarantees the authenticity of origin and the integrity of the content. ecosio secures the exchange automatically at the infrastructure layer using our certified AS4 transport signatures.
What is a Tax Data Document (SK TDD) and does our ERP need to generate it?
The SK TDD is a companion XML file containing specific transaction metadata extracted from your invoice. Your internal ERP system does not need to generate it. When you send a standard Peppol BIS Billing 3.0 invoice, ecosio's fully managed service automatically intercepts the payload, extracts the required tax data, constructs the compliant SK TDD, and submits it to the Financial Administration in near real-time on your behalf.
What are the specific penalties for non-compliance after January 1, 2027?
The Slovak Financial Administration enforces strict financial consequences for non-compliance. Failing to issue invoices in the correct structured format, late reporting, or transmitting inaccurate data can result in administrative fines ranging from €10,000 to €100,000 per violation. Additionally, your customers will be legally blocked from claiming VAT deductions on any non-compliant invoices you send them, severely impacting your business relationships.
What is happening to the current IS EFA portal?
The current centralized government portal, Informačný Systém Elektronickej Fakturácie (IS EFA), is being completely decommissioned. Starting January 1, 2027, direct API connections and manual portal uploads will no longer be available. The Slovak government will transition to the decentralized Peppol network, meaning public entities will receive invoices exactly like private businesses.

Country Specs

Mandate StatusMandatory
Model Type
Government EntityFinančná správa (Financial Administration of the Slovak Republic)
FormatsUBL 2.1
Infrastructure / PlatformPeppol
E-signature RequiredNo
Key Deadlines1 January 2026: The e-invoicing legislation officially became legally valid. This marked the earliest start of the pilot/voluntary phase, allowing early adopters to test issuing and receiving structured e-invoices.**

1 January 2027: Mandatory e-invoicing issuance & reception for domestic B2G and B2B transactions. B2G previous model will be fully replaced.

1 July 2030: The mandate will expand to cover intra-EU cross-border transactions, aligning with the EU's VAT in the Digital Age (ViDA) timeline.
AR MandatoryYes
AP MandatoryYes
Peppol AvailableYes
Domestic TransactionsYes
Cross-border TransactionsNo
Archiving Period10 years
Archiving AbroadYes. This is allowed under certain conditions.

Contact an expert

Feeling lost or need more info about this e-invoicing mandate? ecosio can help!

Our team of e-invoicing experts is ready to guide you through everything needed to stay compliant—not just with this mandate, but with all current and upcoming e-invoicing requirements worldwide.
Send us your questions. We’ll provide clear, actionable answers!

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