As Croatia prepares to enforce mandatory B2B e-invoicing starting January 1st, 2026, many companies remain in a state of uncertainty regarding Croatia B2B e-invoicing. While the regulation is not entirely new to those familiar with B2G requirements, the transition to Croatia B2B e-invoicing compliance involves a different structure, timeline, and technical setup.
This guide outlines the essentials every business must understand to ensure smooth, timely compliance with Croatia B2B e-invoicing. Many have “heard something is changing” but in most cases, the how, when, and what exactly to do remain unclear when it comes to Croatia B2B e-invoicing.
The Timeline: What’s Mandatory and When?
Understanding Croatia B2B E-Invoicing Regulations
Adapting to Croatia B2B e-invoicing will require a robust approach to ensure compliance.
- B2G e-invoicing is already mandatory in Croatia.
- B2B e-invoicing becomes mandatory from January 1, 2026.
- A test environment opens in September 2025.
- B2C e-invoicing is expected to follow from January 2027.
**Preparation must realistically start by Q4 2025 to allow for system integration, testing, and partner onboarding.
Croatia’s E-Invoicing Framework: Key Components
You Cannot Connect Directly
Businesses cannot send XMLs or PDFs via email. All B2B e-invoices must be routed through FINA’s official platform, Servis eRačun za državu, and only certified intermediaries can connect to this system.
For businesses engaged in Croatia B2B e-invoicing, preparation must realistically start by Q4 2025.
Understanding the implications of Croatia B2B e-invoicing is crucial for all stakeholders.
Partnering with an approved service provider is the most efficient and compliant route. These providers also handle tasks like:
- Validation
- Archiving
- Error handling
- Status updates and reporting
Why This Model?
Croatia’s model ensures:
- Standardization
- Real-time data integrity
- Compliance with Fiskalizacija 2.0 (Croatia’s new fiscal control framework)
Fiscalization vs. E-Reporting: What’s the Difference?
Fiscalization (B2C Retail)
In summary, Croatia B2B e-invoicing enhances transparency and efficiency.
- Real-time submission of sales receipts
- JIR code approval required before printing
- Applies to cash/card/POS payments
E-Reporting (B2B/B2G)
- Structured data reporting (no real-time approval)
- Includes invoice issue, payment, and rejections
- Mandatory even if no e-invoice is generated (e.g., physical delivery)
- Must be submitted in real-time or near real-time (not in bulk)
| Fiscalization (B2C) | E-Reporting (B2B/B2G) | |
| Real-time approval | ✅ Required (JIR code) | ❌ Not required |
| Applies to | POS, Retail Transactions | VAT-registered Businesses |
| Goal | Tax control at sale point | Full audit traceability |
Misunderstanding this distinction is a top reason for compliance delays.
Technical Requirements: Formats, Codes, and Compliance
Invoice Format: UBL 2.1, CIUS, EN 16931
All systems must automatically support and validate these formats. Manual conversion is not practical.
KPD 2025 Codes: Required on Every Invoice
KPD 2025 (Croatia’s product classification) aligns with EU’s CPA 2.2 standard. Each product/service must be tagged with a six-digit KPD code.
- Use KLASUS to search correct codes
- ERP/invoicing systems must allow integration
Even though real-time approval isn’t required, reporting must happen in real time or shortly after. Bulk uploads or periodic batches do not satisfy the law.
Manual assignment leads to validation errors
PEPPOL and Cross Border Readiness
What Is PEPPOL?
PEPPOL is a pan-European network for secure e-document exchange. It uses certified Access Points for interoperability.
Croatia’s Status:
- PEPPOL is not mandatory (yet), but Croatia is PEPPOL-compatible
- PEPPOL will likely play a role in the EU’s ViDA initiative
Companies with EU clients should prioritize PEPPOL readiness
Melasoft’s Solutions for E-Invoicing Compliance
SAP-Integrated Add-on
Perfect for enterprises using SAP. Offers:
- Seamless invoice submission from SAP
- Built-in compliance workflows
- Real-time e-reporting
Ideal for non-SAP users. Includes:
- Simple, no-code interface
- Automated validations & rejections
- Real-time PEPPOL support
Both Platforms Support:
- UBL 2.1, EN 16931, CIUS compliance
- KPD code assignment
- Certified intermediary integration
- AI-powered OCR (MELA AI)
- Long-term digital archiving
Final Takeaways: How to Stay Ahead
- E-reporting is the core compliance challenge
- Each invoice, payment, or rejection must be reported as it happens
- Fiskalizacija 2.0 shifts B2B monitoring to real-time auditability
- Don’t wait for 2026 – begin in Q4 2025
- Choose partners who understand both law and integration
Need Help?
How does it work?
At Melasoft, we don’t just offer tools – we deliver peace of mind. Whether you’re managing SAP or need a standalone platform, our e-invoicing solutions ensure you stay compliant, connected, and confident.
Talk to our experts or request a live demo today.