Croatia’s Fiscalization 2.0: Europe’s Most Ambitious E-Invoicing Mandate

Since 1 January 2026, Croatia has operated the most comprehensive e-invoicing mandate Europe has seen to date. While Belgium limits its scope to B2B- and B2G transactions via the Peppol network and Poland builds a centralised clearance model focused on B2B, Croatia goes fundamentally further. The country mandates electronic invoicing for all transaction types – B2B, B2G and B2C – combined with real-time reporting to the tax authority. This makes Croatia e-invoicing Peppol 2026 a unique case within the European landscape.

For businesses trading with Croatian partners, this is far from abstract policy news. Croatia’s largest trading partners are Italy, Germany, Slovenia, Bosnia-Herzegovina, Hungary and Austria – countries each with their own e-invoicing trajectories. Croatia’s decision to build a fully integrated system around Peppol-compatible infrastructure, combined with fiscal control, creates both operational challenges and strategic opportunities for international trading partners.

The facts: Fiscalization 2.0 at a glance

The Croatian Parliament approved the new Fiscalization Act on 11 June 2025, replacing the existing Act on Fiscalization of Cash Sales. The law entered into force on 1 September 2025, after which a testing environment was made available. From 1 January 2026, the mandate is fully effective for all VAT-registered businesses.

Implementation follows two phases. From 1 January 2026, all VAT-registered businesses in Croatia must issue and receive electronic invoices for domestic B2B and B2G transactions. At the same time, non-VAT-registered businesses must be capable of receiving e-invoices. In the second phase, from 1 January 2027, the obligation extends to non-VAT-registered businesses, micro-enterprises and public bodies, which must then also be able to issue e-invoices.

What distinguishes Croatia e-invoicing Peppol 2026 from other European mandates is the integration of three elements into one system. First: mandatory electronic invoicing for B2B and B2G with structured invoices conforming to EU standard EN 16931 in UBL 2.1 format. Second: Continuous Transaction Controls (CTC) with real-time reporting of fiscal data upon both sending and receiving invoices. Third: extended fiscalisation of all B2C transactions, including online payments via bank transfer, Google Pay, PayPal and similar payment methods – whereas B2C transactions previously only needed to be reported for cash and card payments.

How the system works technically

Croatia implements a decentralised e-invoicing model combined with centralised reporting. This means e-invoices are exchanged directly between parties, while invoice data is separately reported to the tax authority by both sender and receiver.

The infrastructure

The system revolves around four core components. The Adresar metadata sustava (AMS) serves as the central address directory maintained by the tax authority, comparable to the Peppol Service Metadata Publisher. It contains the identification data and metadata of all taxpayers, enabling the system to determine where to send an e-invoice. The FiskAplikacija is the government application for fiscalisation and e-reporting, where businesses can review fiscalised data, manage authorisations, check invoice statuses, and consult pre-filled VAT returns. Certified information intermediaries are service providers authorised by the Croatian tax authority to facilitate the entire e-invoicing process, from transmission to receipt, fiscal reporting and archiving. Finally, the government provides MIKROeRAČUN: a free invoicing application for small businesses not registered for VAT.

Invoice format and exchange

Croatian e-invoices must comply with the HR-CIUS (Croatian Core Invoice Usage Specification), based on the European standard EN 16931. The recommended format is UBL 2.1, supplemented by the Peppol BIS 3.0 standard. The Cross-Industry Invoice (CII) format is also supported, but UBL is most common due to broader adoption and simpler implementation.

Invoice exchange runs preferably through access points and certified intermediaries using the AS4 protocol. Croatia’s system uses components with similar functions to Peppol – access points, metadata services and the AS4 protocol – but operates under its own certification processes. The Peppol network may be used as an alternative exchange method, provided the integrity and authenticity of the e-invoice are maintained.

Each invoice must be digitally signed with a certificate linked to the sender’s tax identification number. Every invoice also contains a QR code that allows the recipient to verify its submission to the tax authority.

The reporting obligation

Here lies the core of Croatia’s ambition. The CTC system requires real-time reporting of fiscal data for outbound invoices at the moment of sending, and a five-business-day reporting window for inbound invoices. On top of this comes additional e-reporting of payment information, invoice rejections by recipients, and situations where an invoice could not be issued because the buyer was not registered in the AMS directory.

The result is a system that gives the tax authority a near-complete picture of all economic transactions in real-time – not just the invoice itself, but also payment status, potential disputes and administrative processing on both sides.

Early results: 2.55 million invoices in two weeks

Initial indicators are remarkably positive. In the first two weeks of Fiscalization 2.0 – from 1 to 15 January 2026 – more than 2.55 million e-invoices were successfully fiscalised. The Croatian tax authority published clear guidelines covering the correct handling of self-billing, the structure of XML data in MIKROeRAČUN, and the policy regarding technical errors. An important signal for businesses: technical errors such as incorrect dates do not trigger penalties or tax liabilities during the implementation period.

This smooth rollout is no accident. Croatia has methodically built its e-invoicing infrastructure over the past decade – from cash transaction fiscalisation in 2013, to mandatory B2G acceptance from December 2018, to full B2G e-invoicing via the national platform Servis eRačun za državu since July 2019, managed by financial agency FINA. This platform is integrated with the Peppol network, with FINA operating as a certified Peppol access point.

What makes Croatia different from the rest of Europe

To understand the position of Croatia e-invoicing Peppol 2026 within the European landscape, a comparison with other mandates is instructive.

België: puur gedecentraliseerd Peppol

België kiest sinds januari 2026 voor een volledig gedecentraliseerd Peppol-model voor B2B- en B2G facturatie, zonder centrale clearing of real-time rapportage aan de overheid. Facturen worden rechtstreeks uitgewisseld tussen accesspoints. Dit is het eenvoudigste model voor bedrijven, maar geeft de overheid minder direct zicht op transacties.

Belgium: purely decentralised Peppol

Belgium has opted since January 2026 for a fully decentralised Peppol model for B2B invoicing, without central clearing or real-time reporting to the government. Invoices are exchanged directly between access points. This is the simplest model for businesses but gives the government less direct visibility into transactions.

Poland: centralised clearance via KSeF

Poland is implementing the KSeF system from February 2026 – a centralised clearance model where every invoice must pass through a government platform before reaching the recipient. Poland also uses its own invoice format (FA(3)) that is not compatible with EN 16931, limiting interoperability with other European systems.

Croatia: the hybrid model

Croatia combines decentralised invoice exchange with centralised reporting. Invoices are exchanged directly between parties via access points, but the data is simultaneously reported to the tax authority. The country uses the European EN 16931 standard in UBL format and builds on Peppol-compatible infrastructure. Moreover, Croatia is the only EU country that brings B2B, B2G and B2C together in one integrated mandate with real-time CTC reporting.

This approach positions Croatia as the most ViDA-ready country in Europe. The EU’s VAT in the Digital Age directive, which becomes mandatory for intra-Community transactions from 2030, requires exactly this type of digital real-time reporting based on e-invoicing. Croatia is already building the infrastructure that other EU countries will not need to implement for another four years.

Practical implications for international trading partners

Scope: who is and isn’t covered?

The obligation to issue and receive e-invoices applies to all VAT-registered businesses established in Croatia or maintaining a fixed establishment in the country. Foreign businesses that only hold a Croatian VAT registration without a physical presence are likely not subject to the mandatory issuance requirement – although final clarification on this point has not been fully published.

Importantly, the mandate applies only to domestic transactions. Cross-border transactions may still use paper invoices. However, this creates an operational tension that directly affects international trading partners.

Scenario 1: The Italian furniture supplier to a Croatian hotel

Albergo Forniture S.r.l. from Milan supplies furniture and interior products to hotel chains on the Dalmatian coast. The company has no establishment in Croatia.

As a foreign supplier without a fixed establishment in Croatia, Albergo Forniture is not subject to the direct e-invoicing obligation. They can continue sending invoices the traditional way. However, their Croatian customers are required to process all domestic invoices electronically through the new system. This means Croatian hotels must maintain two separate processing systems: one for domestic e-invoices with automatic fiscalisation, and one for international invoices processed manually.

In practice, Croatian businesses will increasingly prefer suppliers who can send electronic invoices – not because it is legally required, but because it significantly reduces administrative burden. An Italian supplier already using Peppol for its Italian SdI obligations can relatively easily serve Croatian customers electronically as well.

Scenario 2: The Slovenian manufacturer with a Croatian subsidiary

Industrijska Rešitev d.o.o. from Ljubljana has a production facility in Rijeka supplying parts to Croatian automotive manufacturers.

Because the Croatian facility constitutes a fixed establishment with its own staff and production resources, it falls fully under the Fiscalization 2.0 mandate. All invoices issued from Rijeka to Croatian buyers must be issued electronically, fiscalised and reported in real-time. The Slovenian parent company must integrate its ERP system with Croatian fiscalisation infrastructure, engage certified intermediaries, and implement digital signatures linked to the Croatian tax identification number of the establishment.

Slovenia is itself working towards an e-invoicing mandate from January 2027, also with Peppol as the underlying standard. The Slovenian company can therefore strategically choose a Peppol-based solution that covers both Croatian and future Slovenian requirements – an investment that delivers double returns.

Scenario 3: The German machinery manufacturer with occasional Croatian clients

Werkzeugmaschinen GmbH from Stuttgart delivers a few machines annually to industrial buyers in Zagreb and Osijek, but has no establishment or VAT registration in Croatia.

This company falls entirely outside the scope of the Croatian mandate. Yet it deserves attention. As the Croatian market digitalises, even occasional trade relationships will be influenced by the expectations of Croatian buyers. A German supplier holding a Peppol ID for Belgian or future German obligations can relatively easily extend this to Croatian business partners.

Strategic advice for international businesses

For businesses that regularly trade with Croatia

Assess whether you have a fixed establishment in Croatia or plan to establish one. The presence of a fixed establishment determines whether you fall directly under the mandate. Evaluate your current Peppol connectivity. If you already use Peppol for other markets such as Belgium, France or Scandinavian countries, expanding to Croatia is a relatively small step, as the country builds on the same EN 16931 standard and Peppol-compatible infrastructure.

Consider proactive adoption, even if you are not legally required to do so. The administrative benefits for your Croatian trading partners – automatic fiscalisation, pre-filled VAT returns, streamlined processing – strengthen the trade relationship and may lead to faster payments.

For businesses that have not yet implemented e-invoicing

Croatia’s mandate underscores a broader European trend. With Belgium mandatory since January 2026, France from September 2026, Poland from February 2026, and the EU-wide ViDA framework from 2030, the question is not if but when e-invoicing will affect your business. A comparison of e-invoicing service providers on Peppol.now can help select the right solution – preferably a provider that can support multiple European mandates from a single platform.

For ERP and software vendors

Croatia’s Fiscalization 2.0 sets high standards for technical integration: digital signatures, real-time CTC reporting, AMS registration, and support for the HR-CIUS invoice format. Software vendors looking to serve clients in the Croatian market must invest in certified connectivity with Croatian fiscalisation infrastructure.

Croatia as a blueprint for Europe’s future

Croatia e-invoicing Peppol 2026 is more than a local compliance matter. It is a preview of what the rest of Europe can expect. The country demonstrates that it is possible to bring B2B, B2G and B2C together in one integrated system with real-time fiscal control, built on European standards and Peppol-compatible technology.

The successful launch – with more than 2.55 million fiscalised invoices in the first two weeks – proves that an ambitious mandate is manageable when infrastructure is methodically built up. Croatia’s decade of experience with gradual digitalisation, from cash fiscalisation in 2013 to B2G in 2019 and now the full B2B+B2C mandate, offers lessons for every European country considering similar steps.

For international businesses, the message is clear: Peppol connectivity is not a luxury but a strategic necessity that gains value with every new European mandate.

Sources

• Croatian Fiscalization Act (NN 89/25), published 11 June 2025

• European Commission – eInvoicing in Croatia, Digital Building Blocks

• Croatian Tax Administration (Porezna uprava) – Fiscalization 2.0 guidelines

• FINA – Servis eRačun za državu (national B2G e-invoicing platform)

• OpenPeppol – Peppol Authority and Access Point information

Looking for a reliable e-invoicing solution ready for the Croatian mandate and other European requirements? On Peppol.now you can compare service providers that support Peppol connectivity, EN 16931 compliance and multi-country e-invoicing. View the overview at peppol.now and make an informed choice.