The OIB (Osobni identifikacijski broj) is Croatia's Personal Identification Number, a unique 11-digit identifier used for tax, social security, employment, banking, and all official transactions. EU citizens residing in Croatia must obtain an OIB from the Tax Administration (Porezna uprava). This guide explains the application process, required documents, where to apply, processing time, and how the OIB is used across Croatian government systems including the Pension Insurance Institute (HZMO) and Croatian Health Insurance Fund (HZZO).
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OIB (Personal Identification Number / Tax ID)
Croatia
Last verified: 2026-02-20
Fees, fines, and deadlines are approximate. Always verify with official sources.
Key Registrations & Procedures
OIB (Personal Identification Number / Tax ID)
Deadline: Must obtain before starting employment or any official transaction
Processing Time: 1–5 working days. Can sometimes be issued same day.
Fees: Free
Appointment: No appointment needed. Walk-in at local Tax Office.
Required Documents:
- Valid passport or national ID card
- Proof of Croatian address (rental contract or registration certificate)
- Completed OIB request form (Zahtjev za OIB — available at the office)
Where to Do It:
Local Tax Administration office (Ispostava Porezne uprave). In Zagreb: Avenija Dubrovnik 32. Available in every major city.
If You Don't Do It:
No fine for not having one, but the OIB is required for employment, banking, healthcare, utilities, and virtually all official interactions in Croatia.
Regional Variations: Same process nationwide. OIB is a single national system.
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