An sole trader (ST or IK) is a natural person entered in the Commercial Register.

A natural person has an obligation apply himself/herself for the registration as an sole trader in the Commercial Register if the person complies with any of the following criteria:

• the annual turnover from the economic activity exceeds EUR 284 600;
• the economic activity complies with the activity of a commercial agent (Article 45 of the Commercial Law) or a broker;
• the annual turnover from the economic activity exceeds EUR 28 500, and the person employs more than five employees simultaneously for the purpose of its economic activity.

A natural person may apply himself/herself for the registration in the Commercial Register even if it does not comply with the criteria described above.