What do the abbreviations IČO and DIČ mean in the Czech Republic?

IČO (short for the Czech "Identifikační číslo osoby")

Simply put, this is the registration (identification) number of a Czech legal entity (company), of a Czech individual entrepreneur, or another organization in the country. The number always consists of exactly 8 digits (numbers only, and strictly 8 digits). The number is always unique, cannot be duplicated, and serves as a unique identifier for the company or entrepreneur. It is automatically assigned when a legal entity is established or an individual entrepreneur is registered. Moreover, this number remains permanent. For example, a legal entity in the Czech Republic may undergo any changes – founders, legal address, name, even its legal form – but the IČO always remains unchanged.

For example, our company’s IČO is 24312134

DIČ (short for the Czech "Daňové identifikační číslo")

In short, this is the Tax ID of a Czech company, entrepreneur, or another organization in the Czech Republic – essentially, a taxpayer identification number under which the entity is registered with the Czech tax authorities. This number is identical to the registration number (IČO), but with the prefix CZ added at the beginning. The DIČ number is also automatically assigned upon establishment of a legal entity or registration of an individual entrepreneur in the Czech Republic.

For example, our company’s DIČ is CZ24312134

Both IČO and DIČ can be found in almost any entrepreneur's extract. They are nearly always indicated on all invoices, bills, receipts, and contracts concluded with the entrepreneur.