What is a Military Board of Inquiry (BOI) or Show Cause Board?
A Board of Inquiry (BOI)—referred to as a Show Cause Board in the U.S. Navy—is an administrative military proceeding where a commissioned officer must “show cause” as to why they should be retained in military service following allegations of misconduct, poor performance, or adverse administrative actions.
Who is entitled to a Board of Inquiry hearing before administrative separation?
Commissioned officers with six or more years of active commissioned service have a statutory due process right to present their defense at a Board of Inquiry before the military can involuntarily separate or discharge them.
What decisions does a Board of Inquiry make?
A Board of Inquiry must answer three sequential questions:
Did the evidence establish that the officer committed misconduct or failed to perform duties as alleged?
If misconduct occurred, does it warrant involuntary administrative separation from military service?
If separation is recommended, what characterization of discharge (e.g., Honorable, General Under Honorable Conditions, or Other Than Honorable) should the officer receive? If eligible, the board may also recommend a retirement pay grade.
Who sits on a Military Board of Inquiry?
A Board of Inquiry consists of three senior military officers who are higher in rank than the officer facing separation (the respondent). The senior-most member acts as the board president.
Do strict military rules of evidence apply during a Board of Inquiry?
No. A Board of Inquiry is an informal administrative proceeding, meaning standard Military Rules of Evidence do not strictly apply. However, the board must follow strict procedural guidelines, and officers retain the right to submit documentary evidence, present character witnesses, and cross-examine witnesses.
Can an officer have legal representation at a Board of Inquiry?
Yes. Officers appearing before a Board of Inquiry have the right to be represented by appointed detailed military legal counsel, or they may hire an experienced civilian military defense lawyer at their own expense to fight for their career and retirement benefits.
Does a prior Non-Judicial Punishment (Article 15 / Captain’s Mast) mean an officer will automatically be discharged at a BOI?
No. A prior finding of guilt at an Article 15 or Captain’s Mast does not guarantee discharge at a Board of Inquiry. The independent three-member board considers all new evidence, duty performance records, and character evidence before making an independent determination.









