Paul Ebery, 41, of Kingsway Grove, was also handed a five-year restraining order after appearing at Sheffield Crown Court.
Ebery stole £60 from his 80-year-old father after he agreed to let him withdraw cash on August 29 from his bank card, but instead of taking £40 he withdrew £100.
After the complainant, from Birkwood Avenue, discovered what happened he refused to give his son a further £30 which led Ebery to lock his father in the house for 30 minutes.
Ebery pleaded guilty to committing theft and imprisonment.
