Steczkowski served as Minister of Finances in the government of Jan Kucharzewski. On 4 April 1918, the Regency Council set up a government in which he became the Prime Minister. His government only lasted until 23 October.
Steczkowski returned to politics in the government of Wincenty Witos (1920-1921), once again leading the Ministry of Finances. Later he was the director of the Gospodarstwa Krajowego bank.