E-invoices are a legal requirement in Croatia – are you compliant?
From January 1, 2026, all taxpayers in Croatia must issue and receive e-invoices in accordance with the Fiscalization and Electronic Reporting Act.
With bizBox , the certified solution of the ZZI company, ensure full legal compliance, validation and stable business – without uncertainty and downtime .
E-invoices are mandatory – but the problems have just begun
Although the legal obligation has already entered into force, practice shows that many users still encounter problems.
E-invoices are visible in FiskApp, but not to the recipient.
Fiscalization passes, but the e-invoice does not pass validation.
Users do not know where the account is "stuck".
While the law stipulates the obligation of e-invoices, bizBox ensures their correctness.
By validating incoming and outgoing e-invoices according to applicable standards, we ensure that each e-invoice is technically correct, legally compliant, and ready for further processing.
Why e-invoices?
Even if the law does not prescribe it, e-invoices have numerous advantages. They bring efficiency, security and accuracy – without paper, errors and wasted time. With e-invoices, invoices arrive faster, payments come earlier and cash flow becomes more stable.
compliance with legislation
With e-invoices, you are always in compliance with the law – without worrying about regulations and deadlines.
Save time and make fewer mistakes
E-invoices automate processes and eliminate manual data entry, thereby reducing the possibility of error and saving valuable time.
Cost reduction
Reduce labor costs associated with issuing, receiving, and posting invoices. E-invoices eliminate paper and postage costs and significantly reduce the cost of archiving.
Faster payments
An e-invoice tracking system ensures that invoices don't go unnoticed, thereby shortening payment deadlines and improving your company's cash flow.
Greater security
Prevent risks like account loss, incorrect addresses, and security threats posed by traditional or electronic mail.
Simple overview
You can easily view all sent and received e-invoices in one place, which increases transparency and improves business organization.
Prevent loss or deletion of documentation
Instead of expensive archive spaces or external storage, bizBox enables secure and legally compliant electronic storage of all documents.
Switch your business to e-invoices!
bizBox makes sure your e-invoices and e-documents get where they need to go – legally, reliably, and without any extra work for you.
Use the free bizBox web application or your existing accounting system – the choice is yours.
bizBox - A reliable solution for e-invoices
bizBox enables simple, secure and legally compliant sending, receiving and archiving of e-invoices, as well as connecting with partners throughout the entire fiscal and reporting process.
ZZI doo – certified information intermediary
The company ZZI doo with the bizBox solution has been officially included in the list of certified information intermediaries of the Tax Administration of the Republic of Croatia.
Frequently asked questions about e-invoices and bizBox
What does it mean that ZZI is a certified service provider?
This means that ZZI doo (OIB 98034145705) , with the bizBox solution, is officially listed on the list of certified information intermediaries of the Tax Administration of the Republic of Croatia.
bizBox users can safely and legally send, receive and fiscalize e-invoices — without additional steps or risks.
Is bizBox connected to the Tax Administration and fiscalization?
That. bizBox automatically fiscalizes and archives e-invoices in accordance with regulations.
Data is securely exchanged with the Tax Administration, and users can monitor the status of their documents at any time through the web application.
Does a fiscalized e-invoice mean that it is automatically correct?
Not. Fiscalization does not guarantee the technical correctness of the e-invoice. An e-invoice may be fiscalized but still invalid for further processing if the XML does not conform to the standard.
Why is the e-invoice visible in FiskApp, but not in bizBox?
Because fiscalization does not check the entire e-invoice. A special XML with limited data is sent to FiskApp, while bizBox checks the entire XML structure of the e-invoice according to the prescribed scheme.
Why do some e-invoices “not go through” the system?
Because they do not pass technical or content validation (e.g. incorrect XML schema, missing data). Systems that perform full validation correctly reject such e-invoices.
How can I be sure I'm using a legal solution?
Check if the service provider is listed by the Tax Administration of the Republic of Croatia .
bizBox, which operates under ZZI doo (OIB 98034145705) , is on the official list of certified intermediaries – which guarantees legal compliance, security and data protection.
How much does it cost to use bizBox?
Registration is free and includes 20 free e-invoices per year .
You can then choose an annual package according to your needs — with no long-term commitments and no hidden costs.
Do I need technical knowledge to use bizBox?
No, you don’t need any special technical knowledge to use bizBox!
The system is simple and clear, so you can use it without difficulty – even if you are not an IT expert.
You can use bizBox via a web application or directly within the accounting system (ERP) you already use – everything works automatically and without complicated settings.
Who can I send an e-invoice to via the bizBox network?
With bizBox you can send e-invoices to all Croatian companies that are taxpayers and that are from January 1, 2026, mandatory receive e-invoices in accordance with the law.
In addition, bizBox allows you to send and exchange e-invoices and other e-documents across Europe and the region – including the Balkan countries and the entire PEPPOL network.
One solution, one network – connected business without borders.
Why choose bizBox?
bizBox performs full validation of incoming and outgoing e-invoices in accordance with current legislation. This ensures users that e-invoices are technically correct, legally compliant and ready for further processing – without unpleasant surprises.