How to Get an OIB as a Foreigner in Croatia: Step-by-Step (2026)

OIB stands for osobni identifikacijski broj, which translates as "personal identification number." It's an 11-digit code assigned by the Croatian Tax Administration (Porezna uprava) to every person and legal entity that has any legal, tax, or administrative connection to Croatia.

Think of it as Croatia's equivalent of a US Social Security Number or a UK National Insurance Number. A few key things to understand:

• It is permanent and unique — once assigned, it never changes, even if you change your name, get married, or later acquire Croatian citizenship.
• It applies to both individuals and companies.
• For individuals it doubles as your tax number; for companies it also serves as the VAT identification number.

In short, the OIB is the single identifier that follows you across the land registry, the courts, the banks, the notaries, and every government office in the country.

This is not an optional formality. In practice, you cannot complete almost any meaningful transaction in Croatia without one. You will be asked for your OIB when you:

• Buy, sell, or inherit property
• Open a Croatian bank account
• Sign any contract before a notary
• Register or become a director/shareholder of a company
• Apply for a residence permit and register your address
• Start employment or self-employment
• Register a vehicle
• Set up utilities, internet, or a phone contract

If you're relocating, the OIB is genuinely the "house key" to everything that follows. Without it, the rest of your move simply stalls.

Croatian law requires an OIB for anyone who incurs a tax liability, acquires assets, or is entered into any official register in Croatia. That covers a far wider group than most people expect — including people who never intend to live in Croatia full-time.

A few common scenarios:

• EU / EEA / Swiss citizens and non-EU (third-country) citizens both need an OIB. The process is essentially the same; the main practical difference is which identity document you present.
  
  
• Non-residents can get one. You do not need to already hold residence to be assigned an OIB — in fact, the OIB usually comes first.
  
  
• Children and minors typically need one too if they'll be named as a property heir, enrolled in school or healthcare, or otherwise entered into an official record.
  
  
• Foreign companies need one to buy commercial property, open a branch or subsidiary, or sign contracts with Croatian partners — even with no physical presence in the country.

In plain terms: if you have any legal, financial, or property tie to Croatia, you almost certainly need an OIB — and you'll need it earlier in the process than you think.

There are several routes to obtaining an OIB, and the right one depends on where you are, how quickly you need it, and what else you're trying to accomplish at the same time.

1. In person in Croatia

You can apply directly at a regional Tax Administration office with a valid identity document and a completed application form. This is the classic route — but it requires you to be physically in Croatia, and you'll want to be confident your documents meet the exact requirements before you go.

2. By post / email submission

For those who'd rather not queue at an office, applications can be submitted with scanned documents. The catch: the formatting and document standards are unforgiving, and an incomplete submission simply resets the clock.

3. Through a Croatian embassy or consulate abroad

If you're still in your home country, a Croatian diplomatic mission can forward your application to Zagreb. This is useful for getting your number ready before you travel — though timelines vary by mission and it adds a layer of coordination.

4. Through an authorised representative in Croatia

The option most foreigners overlook — and often the smartest — is appointing someone in Croatia to obtain the OIB on your behalf via a notarised power of attorney. This means you don't need to travel just for this step, the paperwork is prepared correctly the first time, and the OIB can be slotted into the larger process (property purchase, company setup, or residence) without delays.

Most non-residents who handle this well never set foot in a tax office. They get their OIB sorted remotely and arrive in Croatia with the groundwork already done.

For an individual, the requirements look simple on paper: a valid identity document that both identifies you and clearly confirms your nationality, plus the correct application form. The most common reason individuals get rejected is presenting a document that's expired or that doesn't prove citizenship on its own (a foreign residence card, for example, often isn't enough).

For a foreign company, it's significantly more involved. In addition to the application, you'll generally need an official extract from your home-country commercial register and your founding documents. And here's the part that derails most do-it-yourself attempts:

• Every foreign-issued official document must carry an apostille before Croatia will accept it.
• Every non-Croatian document must be translated into Croatian by a certified court interpreter (sudski tumač) — a regular certified translation does not qualify.

Getting an apostille and a court-appointed translation organised remotely, in the right order, with the company details formatted exactly as they appear in your home register, is precisely where weeks of delay creep in.

By law, the Tax Administration must process an OIB application within eight working days. In practice:

• In person: often the same day or within a few days.
• Remote / postal submissions: typically a handful of working days, if the documents are flawless.
• Foreign companies: the eight-day clock only starts once complete, correctly apostilled and translated documents are submitted. A single rejected document can add weeks.

The processing speed is rarely the bottleneck. Document preparation is.

Most OIB problems aren't about the application itself — they're avoidable preparation errors:

• An expired or insufficient ID that doesn't clearly confirm citizenship.
• A company extract submitted without an apostille.
• A translation done by someone who isn't a Croatian court-appointed interpreter.
• An incomplete or incorrectly formatted application form (especially for legal entities).
• Treating the OIB as a standalone errand instead of sequencing it correctly with the rest of your move.

Each of these is small on its own. Stacked together, they're the difference between a smooth relocation and a transaction that stalls at the starting line.

Here's what's easy to miss: for almost everyone, the OIB isn't the goal — it's the gateway. It's the first item on a much longer list.

• Buying property? The OIB must be in place before a notary can authenticate your contract, and it should be obtained alongside the land-registry checks.
• Setting up a company? Every founder, director, and shareholder needs an individual OIB before registration can even begin.
• Applying for residence? The OIB is part of your initial documentation package and is needed to register your address.

The foreigners who relocate smoothly are the ones who treat the OIB as the opening move of a coordinated plan — not a box to tick in isolation.

You can navigate all of this yourself. But between the travel, the language barrier, the apostille and court-translation rules, the strict document standards, and the fact that the OIB feeds directly into your next five steps, it's the kind of task where one small error costs real time.

That's exactly what we handle for our clients. We obtain your OIB remotely — without you needing to travel to Croatia just for this step — and make sure it's in place before your property purchase, company registration, or residence application begins. We prepare and submit the application, coordinate any apostilles and certified translations, and sequence it correctly within your wider relocation so nothing stalls.

If you'd like your OIB sorted properly the first time, get in touch with us here and we'll tell you exactly what your situation requires.