Conscription in South Korea
By law, when a Korean man turns 18 years old, he is enlisted for "first citizen service," meaning he is liable for military duty, but is not yet required to serve. When he turns 19 years old (or, in some instances, 20 years old), he is required to undergo a physical exam to determine whether he is suitable for military service. The table below shows the physical exam's possible grades and their outcomes, according to the Military Service Act. Men must enlist by the time they turn 28 (Korean age).
The length of compulsory military service in South Korea varies based on military branch. Active duty soldiers serve 21 months in the Army or Marine Corps, 23 months in the Navy, and 24 months in the Air Force. After conscripts finish their military service, they are automatically placed on the reserve roster and are obligated to attend a few days of annual military training for 6 years.
Conscription in South Korea
For dual citizens, or those with multiple citizenships, male South Koreans must choose their citizenship by the time they turn 18, before March 31 of that year. If these males choose to revoke their South Korean citizenship, they will not be required to complete their mandatory military service. However, if they fail to choose their citizenship by their 18th year, they will be subjected to fulfill their mandatory military service.
If males choose to renounce their citizenship by their 18th year, they are ineligible to gain a Korean work visa (F series) until after they turn 40 years of age. It may still be possible to gain an E series visa.