An Army Major (O-4) can retire, provided they meet the fundamental 20-year time in service requirement mandated for active duty personnel. This milestone is directly tied to the Major’s total active federal service, which determines voluntary retirement eligibility. The length of service remains the primary factor in securing a military retirement, involving years of dedicated service and adherence to specific statutory rules.
The Basic Requirements for Military Retirement
The foundation for military retirement, regardless of rank, is the successful completion of 20 years of active federal service. A Major must reach this benchmark to be eligible for voluntary retirement and receive immediate retired pay. This standard is consistent across all branches of the U.S. military and represents the threshold for earning a lifetime annuity.
The years of service count include all periods of qualifying active duty time. The Major’s rank at retirement dictates the base pay used in calculating their retirement benefit. Meeting this requirement allows the Major to navigate the rank-specific retention rules that apply to intermediate-grade officers.
Understanding Rank-Specific Service Limits for Majors
Officers are subject to statutory service limits by pay grade, similar to the High Year Tenure (HYT) limits for enlisted personnel. For an Army Major, the most significant constraint is failing to be promoted to Lieutenant Colonel (LTC). Under 10 U.S. Code § 632, a Major who is considered for promotion twice and is not selected must either be discharged or retired.
This mandatory action prevents Majors from serving indefinitely past the 20-year mark without further promotion. If the Major is passed over the second time but is within two years of reaching 20 years of service, the law requires retention on active duty until they complete 20 years and become eligible for retirement. This provision ensures the Major receives their earned retirement benefit.
A Major who chooses to retire at 20 years does so voluntarily. Conversely, a Major who is twice passed over is subject to a mandatory, though honorable, retirement. The career path is bounded by the need for continued performance and selection for the next higher rank.
How Army Retirement Pay is Calculated
A Major’s retirement pay is determined by their years of service and the specific retirement system based on their Date of Initial Entry into Military Service (DIEMS). The three primary systems are the Legacy Final Pay, the High-3 System, and the Blended Retirement System (BRS). The Final Pay system applies to those who entered service before September 8, 1980, and uses a calculation based on the Major’s final month of basic pay.
The High-3 system applies to those who entered between September 8, 1980, and December 31, 2017, who did not opt into the BRS. The monthly annuity formula is 2.5% multiplied by the years of creditable service, multiplied by the average of the highest 36 months of basic pay. A Major retiring at 20 years receives 50% of their “High-3” average basic pay, with the percentage increasing for each additional year served.
The Blended Retirement System (BRS) is for those who entered service on or after January 1, 2018, or opted in during the designated window. The BRS combines a defined benefit annuity with a defined contribution plan through the Thrift Savings Plan (TSP). The BRS annuity calculation uses a 2.0% multiplier instead of 2.5%, resulting in a 40% annuity for 20 years of service, supplemented by government TSP contributions.
Essential Non-Monetary Retirement Benefits
Retirement provides access to non-monetary benefits supporting the Major and their family, primarily healthcare. Retiring Majors and their families are immediately eligible for various TRICARE options. If retiring under age 60, they may enroll in TRICARE Select or TRICARE Prime, with costs varying based on the plan selected.
Once the retired Major reaches age 60 and enrolls in Medicare Parts A and B, healthcare transitions to TRICARE For Life (TFL). TFL acts as secondary coverage, wrapping around Medicare and covering most remaining out-of-pocket costs. The Major must pay the Medicare Part B premiums to maintain TFL coverage, which provides worldwide coverage.
Retirees maintain lifelong access to military Morale, Welfare, and Recreation (MWR) facilities, including the Commissary and Exchange systems. These facilities offer goods and groceries at reduced prices. Retirees are also eligible for Space-Available (Space-A) travel on military aircraft, offering a low-cost option for domestic and international travel, subject to seat availability and mission requirements.
The Process of Applying for Retirement
The formal process for an Army Major to transition into retirement begins approximately one year before the desired retirement date. The retirement application should be submitted to the Human Resources Command (HRC) 9 to 12 months prior. The Transition Assistance Program (TAP) process can be initiated as early as 24 months out, and mandatory Pre-Separation Counseling must be completed no later than 365 days before the effective retirement date.
This counseling prepares the Major for the civilian job market and coordinates final administrative steps, including reviewing benefits and financial planning. The Major may also apply for the SkillBridge program, which allows service members to participate in industry training or internships up to 180 days before separation to gain civilian work experience.
Transitioning to Civilian Life
Moving into the civilian sector involves capitalizing on the Major’s management and leadership experience gained as an O-4. The years spent commanding units and managing complex staff functions translate directly into valuable assets for corporate and governmental organizations. Retiring Majors can leverage veterans’ employment resources and networking opportunities provided through the TAP program to connect with private sector employers.
Utilizing remaining educational benefits, such as the Post-9/11 GI Bill, for advanced degrees or specialized certifications provides a competitive advantage. The Major’s experience as a field grade officer positions them well for mid- to senior-level management roles requiring strategic planning and organizational leadership.

