Marine Corps CorporalE-4 Noncommissioned Officer, U.S. Marine Corps
Marine Corps Promotion to E-4 Corporal
To promote to E-4, a Marine must have spent a minimum of eight months as an E-3 and twelve months overall in the Corps. Each quarter, eligible Marines are reviewed for promotion. Marines are ranked based on a composite score, which is based on performance reviews, schools, marksmanship scores, physical fitness test results, time-in-grade, time-in-service, self-education, referrals, collateral duties, and more.
There is a fixed number of slots for each rank of each MOS. Promotion depends on availability of these slots. Technical MOSs sometimes promote slightly faster than non-technical MOSs. If a Marine repeatedly fails to promote, they are presented with the options of separation or switching MOSs.
Truly exceptional Marines have an opportunity to be meritoriously promoted by their Commanding Officer, if there is a vacancy within the unit.
Want to learn more? Read about the Marine Corps' Corporal rank on Military-Ranks.org.