The Commercial Pilot license is the prerequisite for obtaining compensation for flying an aircraft.  It’s the step in the road wher you have conquered the clouds, dealt with short landings and hopefully very few emergencies.  The Commercial Pilot Certification process can occur a number of ways.  Many people choose to do the Multi-Engine Commercial first then add-on the Single Engine Commercial rating to save money.  However, if Multi-Engine flying  isn’t in your immediate goals or dreams, then a simple Single Engine program will be your ticket to the world of the commercial pilot.  Please note: If you are working to become a Certified Flight Instructor you will be required to obtain your Commercial Certification prior to CFI Training.