The minimum age requirement for a professional boxer is 18 years old. This age limit ensures that fighters have reached a level of physical and mental maturity necessary for the sport's challenges. Moreover, regulatory bodies and commissions typically enforce this age restriction to promote safety and fair competition. Young boxers can participate in amateur bouts, but transitioning to the professional level requires readiness and the necessary skill set to compete genuinely. Failure to adhere to age regulations could lead to suspension or sanctions.