In 1902-1903, Pokrovsky was a deputy chairman (chairman from 1904) of the Department of Taxation of the Ministry of Finance. In 1906, he was appointed deputy finance minister and mainly oversaw taxation affairs. In 1914-1916, Pokrovsky was a member of the State Council (retaining his post of the deputy finance minister until July 1914).
In 1902-1903, Pokrovsky was a deputy chairman (chairman from 1904) of the Department of Taxation under the Ministry of Finance. In 1906, he became an assistant finance minister and primarily managed tax matters. From 1914 to 1916, Pokrovsky served as a member of the State Council (continuing his role as deputy finance minister until July 1914).