The plan to phase out the exemptions beginning in 2020 would require support from other ministries and state agencies to be carried out, said a Defense Ministry official, who didn't want to be named, citing office rules.
South Korea requires able-bodied men to finish two years of military service to maintain a strong force in face of threats from rival North Korea.
But according to the Defense Ministry, 28,000 men have been excused from active military duty this year through exemption programs, including service with the country's police and firefighting forces.
South Korea has one of the lowest birthrates in the world and the number of 20-year-old men, the age when they are first eligible for active military duty, is expected to fall to 250,000 by 2020 from the current 350,000, the ministry official said.
Without changes to the current exemption programs, military personnel will fall short by 20,000 to 30,000 annually by 2023, even though South Korea plans to downsize its number of troops from the current 630,000 to 520,000 by 2022, said the official.
