After his father's death in 1614 his territories were partitioned between Augustus and his two brothers - Augustus received northern portions of the Duchy of Neuburg which were constituted as the Duchy of Sulzbach.
Pärast isa surma aastal 1614 jaotati tema territooriumid Augusti ja selle kahe venna vahel - August sai Neuburgi hertsogkonna põhjaosa, millest moodustus Sulzbachi hertsogkond.