Foreigners seeking to buy property, rent services, or conduct business in Croatia must first obtain an OIB, an 11-digit personal identification number required by banks, notaries, and government offices. Applications are submitted in person at the local Porezna uprava (Tax Administration) office with a valid passport, though power of attorney allows remote applications through a representative.
The OIB is free and typically issued the same day with complete documentation, though mail or representative applications take two to four weeks. Common issues include name transliteration errors and address mismatches across documents. The number never expires and is required regardless of any foreign tax ID already held.
Foreigners who want to buy a flat near Split or rent a boat in Zadar need an OIB before almost anything else will work. The OIB (osobni identifikacijski broj, personal identification number) is an 11-digit tax and identification number, and Croatian banks, notaries, utilities and the tax office all ask for it. Getting one is straightforward once you know which office to visit.
I learned this the hard way on a spring recce trip a few years ago. I had booked a notary appointment in Trogir, arrived with my passport and a folder of papers, and was sent back to the tax office because my client had no OIB yet. Lesson learned.
What the OIB Actually Does for You
The OIB follows you through life in Croatia. It appears on your tax records, your property documents and your employment contracts. Without one, you cannot open a bank account, register a company or complete a property purchase.
Foreigners need it for uknjižba (registration of ownership in the land registry), for registering a vehicle, and for signing up with HZZO if you become insured here. Many utility providers also ask for it. Think of it as the key that unlocks everything else on the list.
Where and How to Apply
You apply at the Porezna uprava (Tax Administration) office that covers your place of residence or the place where you plan to do business. If you have no Croatian address yet, most people go to the tax office closest to the property they intend to buy. In Split, that is the office on Put Supavla, and in Zagreb it is the office in Savska cesta. Offices differ in how busy they get, so ask about the queue before you go.
The process itself takes one visit in most cases. You fill in a short application form (Zahtjev za dodjelu OIB-a), present your passport, and the clerk issues the number on the spot or within a few working days. Some offices print it on a certificate you can take away immediately.
Documents You Need to Bring
Bring a valid passport or national ID card. Photocopies are often accepted, but carry the originals in case. If you are applying through a power of attorney, the person acting for you needs a notarized authorization and their own identification.
A proof of your reason for needing the OIB helps. A purchase contract, a rental agreement, a job offer or a company registration document all work. For a property purchase, bring the preliminary contract (predugovor) if you already have one.
Foreigners who plan to stay longer than three months will also need a residence permit or proof of their legal stay, though a short-term buyer can often get an OIB without one.
Timelines and Costs
The number itself is free. You pay nothing to the tax office for the OIB. Some agencies or lawyers charge a fee if they handle the application for you, typically somewhere between 30 and 100 EUR depending on the city and the complexity of the file.
If you apply in person with complete papers, expect to walk out with your OIB the same day or within a week. Applications sent by post or handled through a representative can take two to four weeks. Summer is the worst time: in July the Split office fills up by mid-morning, so I now tell clients to go before 9 a.m. or on a weekday in late May or September.
Common Problems and How to Avoid Them
Name spelling causes more trouble than anything else. Croatian offices transliterate names according to their own rules, so a passport reading “Jovanovic” may be recorded with different letters. Check the spelling on the certificate before you leave the desk.
Another frequent issue is the mismatch between the address on your application and the address used at the notary or bank. Keep the same address on every document. If you later move, update your records with the tax office so your property tax notices reach you.
Finally, do not assume a foreign tax number works here. Croatia requires its own OIB even if you already hold a tax ID in Germany, Austria or Slovenia.
Frequently Asked Questions
Can I get an OIB without being in Croatia?
Yes, you can apply through a power of attorney given to a lawyer, notary or relative who lives in Croatia. The notarized document must specify that the person may request the OIB on your behalf. Without that, you need to appear in person.
How long is the OIB valid?
The OIB never expires. It stays with you for life, even if you leave the country and return years later. You keep the same number.
Do I need a Croatian bank account before I apply?
No. The OIB comes first, and the bank asks for it afterward. Many foreign buyers open accounts at banks such as Zagrebačka banka or Erste once they have the number in hand.
Is the OIB enough to buy property?
It is necessary but not sufficient on its own. You also need a notarized purchase contract, a payment method that clears through the bank, and for non-EU citizens possibly approval from the county authority, which depends on the location and the type of property. Ask your notary which permissions apply to your nationality and the county where the flat sits.
What if the tax office refuses my application?
Refusals usually come from missing or mismatched documents. Ask the clerk to note the exact reason in writing, fix the problem, and return. Most cases are resolved on the second visit.
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