How many hours of flight time must be in powered aircraft for a commercial multi add-on?

To qualify for a commercial multi-engine add-on rating, a pilot must have a minimum of 100 hours of flight time in powered aircraft. This requirement ensures that the pilot has sufficient experience and understanding of aircraft operations, including the complexities that come with multi-engine flying. The 100-hour requirement is set by aviation regulatory authorities to help ensure that pilots demonstrate a level of proficiency and safety when operating multi-engine aircraft, which can be more demanding due to the additional systems and performance characteristics compared to single-engine aircraft. This experience helps the pilot develop the necessary skills to handle the challenges associated with flying multi-engine aircraft effectively.