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.