During his regime, Paul Castellano was one of the most powerful, clever, and efficient crime bosses in America. Castellano was also one of the most richest and successful mafia bosses in America. Castellano had a staggering net worth of roughly $5 Billion. Castellano was making at least $300 Million a year thru mainly construction, waste management, No-Show Jobs, building trade, Labor unions, Labor racketeering, and Extortion.