A corporation is resident in Bulgaria for tax purposes if it is incorporated in Bulgaria.
Permanent establishment (PE)
PEs of foreign tax residents (e.g. branches) are treated as separate entities similar to Bulgarian residents for tax and accounting purposes.
The definition of a PE in the Bulgarian legislation follows, in general, the Organisation for Economic Co-operation and Development (OECD) model; however, it covers a broader scope of activities leading to a tax presence in Bulgaria. A PE is generally defined as a fixed place (own, rented, or otherwise used) through which a foreign entity partly or wholly carries out business activities in the country.