Under the regime of Benito Mussolini, Pella was forced to join the National Fascist Party (PNF), to continue his occupation as tax advisor and professor. As a fascist, he was appointed member of the Governing Council of the Fascist Culture Provincial Institute of Biella and consultant of the municipality of Biella. In the late 1930s he was appointment deputy podestà of Biella, with the task of reorganizing city's financial system.[4]