Korea Military Discharge Date Calculator
In South Korea, all able-bodied male citizens must complete mandatory military service. This calculator tells you the exact discharge date for enlisted soldiers: pick the enlistment date and branch, and it shows the discharge date, the D-day countdown, and how far through the service period you are. Service lasts 18 months in the Army and Marine Corps, 20 months in the Navy, and 21 months in the Air Force, with the discharge date falling one day before the enlistment date plus the service period.
Examples
Army enlistment on January 1, 2026
Army service is 18 months. Adding 18 months to January 1, 2026 gives July 1, 2027, and the discharge date is one day earlier: June 30, 2027.
Navy enlistment on March 16, 2026
Navy service is 20 months, so a sailor who enlists on March 16, 2026 is discharged on November 15, 2027.
Air Force enlistment on May 4, 2026
Air Force service is the longest at 21 months. An airman who enlists on May 4, 2026 is discharged on February 3, 2028.
FAQ
How long is mandatory military service in each branch?
Enlisted soldiers currently serve 18 months in the Army and Marine Corps, 20 months in the Navy, and 21 months in the Air Force. The Navy and Air Force serve longer because of shipboard duty and technical training. Officers and non-commissioned officers have different, longer service obligations; this calculator covers enlisted (conscripted) service only.
Why is the discharge date one day before 'enlistment plus the service period'?
The enlistment day itself counts as the first day of service. A soldier who enlists in the Army on January 1, 2026 completes 18 months of service on June 30, 2027, so the discharge date is one day before January 1, 2026 plus 18 months (July 1, 2027) - that is, June 30, 2027.
Has the service period always been this length?
No. Under the Defense Reform 2.0 plan announced in 2018, service periods were shortened in stages: the Army went from 21 to 18 months, the Navy from 23 to 20 months, and the Air Force from 24 to 22 months, later reduced by one more month to 21. Anyone who served in earlier decades - including many fathers of today's soldiers - served considerably longer, up to 36 months in past eras.
What about alternative forms of service?
Korea offers several alternatives to active duty. Social service agents (public-interest workers) serve 21 months, skilled industrial personnel serve 34 months, and expert research personnel serve 36 months. Conscientious objectors perform 36 months of alternative service living and working at correctional facilities. Those periods differ from active duty, so this calculator does not apply to them.
Does the obligation end at discharge? What is the reserve force?
Not entirely. After discharge, enlisted soldiers are transferred to the reserve force for eight years. Actual reserve training - a few days per year - takes place during years one through six after discharge, while years seven and eight usually involve no training. After the reserve period, men belong to the civil defense corps until age 40, which mainly involves brief annual education.
Service periods by branch at a glance
Army and Marine Corps: 18 months (about 547 days). Navy: 20 months (about 608 days). Air Force: 21 months (about 638 days). The exact number of days varies slightly depending on the lengths of the calendar months involved.
Conscription applies to male citizens of the Republic of Korea, which can include dual nationals and Koreans living abroad depending on their nationality status - a point worth checking with the Military Manpower Administration (MMA) for anyone with overseas ties. The discharge date can be pushed back in rare cases, such as national emergencies or days that do not count toward service due to disciplinary confinement.
Good to know about life during service
Enlisted soldiers advance through four ranks - private, private first class, corporal, and sergeant - on a fixed timetable, so most reach sergeant before discharge. Soldiers receive monthly pay that has risen sharply in recent years, and annual leave of roughly 24 days across the full service period, plus reward and consolation leave.
During service, soldiers can enroll in a government-matched savings program (the Jangbyeong Naeil Junbi savings account) to build a lump sum for after discharge, and can take remote university courses or use self-development subsidies. As discharge approaches, it helps to plan ahead for reserve-force registration and the return to school or work.
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