What Is the Punishment for Adultery in the Military?

The punishment for adultery in the military ranges from a written reprimand to a court-martial conviction carrying up to one year of confinement, total forfeiture of pay and allowances, and a dishonorable discharge. The Uniform Code of Military Justice treats an affair as a criminal matter when it damages unit discipline or the military’s reputation, which is a sharp departure from civilian law, where infidelity is handled in divorce court. What actually happens in any given case turns on the circumstances and the commander’s discretion.

One terminology note before going further. The offense was called “adultery” until 2019, when an executive order replaced it with “extramarital sexual conduct.” The new name covers a broader range of sexual contact, not just intercourse, and it added defenses the old statute did not recognize.

When an Affair Is Actually Prosecutable

Having an affair is not automatically a crime under military law. To convict, the government must prove three things beyond a reasonable doubt: that the service member engaged in a sexual act with another person, that one of them was married to someone else at the time, and that the conduct was “wrongful.”

That third element is where most cases live or die. Article 134 requires proof of what prosecutors call the “terminal element”: that the conduct was either prejudicial to good order and discipline or of a nature to bring discredit upon the armed forces.¹ Without that link to real harm, the affair is not prosecutable. The Court of Appeals for the Armed Forces has said plainly that an allegation of adultery alone, without proof of the terminal element, does not state an offense.²

Prejudicial to good order and discipline means direct harm to how a unit functions. A commander sleeping with a subordinate’s spouse is the textbook example. Bringing discredit on the armed forces is about public perception: open or notorious conduct that would cause a reasonable person to lose respect for the military.

What Commanders Weigh

The Manual for Courts-Martial directs commanders to consider several factors in deciding whether to pursue charges:

The rank and positions of the parties, since affairs across power imbalances draw more scrutiny than those between peers.
The relationship to the other spouse, with affairs involving a subordinate’s spouse treated as especially corrosive.
Whether the affair disrupted operations, degraded readiness, or created a hostile environment.
Any misuse of government resources, like official travel, vehicles, or government travel cards used to facilitate the affair.
Other UCMJ violations wrapped into the conduct, such as fraternization or lying under oath.
Whether the affair was discreet or open and notorious within the unit.

Court-Martial Penalties

When a case goes to a general court-martial, the maximum punishment is a dishonorable discharge, confinement for up to one year, and total forfeiture of all pay and allowances. Those ceilings are reserved for the worst cases, but they define what is on the table.

A general court-martial conviction produces a federal felony record for life. A special court-martial conviction typically produces a federal misdemeanor record. Either shows up on background checks and can affect civilian employment, licensing, and housing long after service ends. A summary court-martial does not produce a criminal conviction.

The dishonorable discharge is the most severe characterization the military can impose. A service member who receives one is generally barred from VA benefits, including healthcare, disability compensation, education benefits, and home loan guarantees.³ A court-martial can also impose a bad conduct discharge, which carries similar stigma but does not automatically disqualify a veteran from all VA benefits; the VA makes an individual determination for bad conduct and other-than-honorable discharges.

Non-Judicial Punishment Under Article 15

Many of these cases never see a courtroom. Commanders frequently handle them through Non-Judicial Punishment under Article 15 of the UCMJ, which disciplines minor offenses without a formal trial.⁴ NJP is less severe than a court-martial but can still end a career.

What a commander can impose depends on the commander’s rank. A field-grade officer (major or above) can impose up to 45 days of extra duties, forfeiture of up to half a month’s pay for two months, and reduction by up to two pay grades for enlisted members above E-4. A company-grade officer is limited to 14 days of extra duties, forfeiture of up to seven days’ pay, and reduction by one pay grade.⁴

A right that service members often overlook: except for members attached to or embarked on a vessel, you can refuse Article 15 punishment and demand trial by court-martial instead.⁵ That decision carries real risk, because a court-martial can impose harsher punishment, including confinement and a punitive discharge. But it also forces the government to prove its case beyond a reasonable doubt with full procedural protections. Talking to a military defense attorney before deciding is essential.

Administrative Consequences

Even when a commander declines to pursue NJP or a court-martial, administrative tools remain available. A formal letter of reprimand placed in the permanent file can quietly end any chance of promotion. A negative performance evaluation does similar damage. Neither requires a finding of guilt, only the commander’s judgment that the conduct warrants documentation.

The most consequential administrative action is involuntary separation. Those proceedings produce one of three discharge characterizations, each with different consequences for benefits and future employment:⁶

Honorable, issued when the overall record met acceptable standards, which preserves full access to VA benefits.
General under honorable conditions, which indicates the positive aspects of service outweighed the negative but the record was not clean enough for an honorable characterization; most VA benefits remain available, though GI Bill eligibility may be affected.
Other than honorable conditions, reserved for significant departures from expected conduct; this can bar access to many VA benefits, though the VA makes case-by-case determinations.³

Defenses

The 2019 overhaul did more than rename the offense. It added a defense that did not exist before: legal separation. If both parties to the sexual conduct were either legally separated by court order or unmarried, the defense applies. Under the old adultery statute, the fact that a service member was legally separated from a spouse was not a defense at all. The catch is that both parties must qualify. If the service member is legally separated but their partner is still married to someone who has not agreed to a separation, the defense fails.⁷

Mistake of fact is also a defense. A service member who honestly and reasonably believed that both parties were unmarried, legally separated, or lawfully married to each other has a valid defense. The key words are “honest” and “reasonable.” Once the defense is raised with supporting evidence, the burden shifts to the government to disprove it.⁷ It works best when the service member can point to concrete reasons for the belief, such as being told directly that the partner was divorced.

How Long Charges Can Be Brought

The military cannot prosecute forever. Under Article 43 of the UCMJ, charges must be received by a summary court-martial authority within five years of the offense.⁸ After that, a court-martial is off the table.

Administrative actions are different. There is generally no statute of limitations on measures like letters of reprimand or separation proceedings. A commander who learns of a years-old affair can still act administratively long after the five-year window for criminal prosecution has closed.

Effect on Retirement and VA Benefits

Service members close to retirement often ask whether a conviction will cost them their pension. An extramarital-conduct conviction by itself does not trigger forfeiture of military retirement pay. Federal law reserves pension forfeiture for a narrow set of offenses against the United States, primarily treason and espionage. An affair, however damaging to a career, is not in that category.

The real financial threat is the discharge characterization. A dishonorable discharge strips eligibility for nearly all VA benefits, which for a career service member can represent hundreds of thousands of dollars in healthcare, disability compensation, and education benefits over a lifetime.³ Even an other-than-honorable administrative discharge can jeopardize benefits, though the VA reviews those cases individually. For a service member facing charges, negotiating the discharge is often where the most money is on the line.

1
Office of the Law Revision Counsel. 10 USC 934 – Art. 134. General Article
2
United States Court of Appeals for the Armed Forces. CORE Criminal Law Subjects – Crimes – Article 134 – Adultery
3
Department of Veterans Affairs. Applying for Benefits and Your Character of Discharge
4
Office of the Law Revision Counsel. 10 US Code 815 – Art. 15. Commanding Officers Non-Judicial Punishment
5
Office of the Law Revision Counsel. 10 USC 815 – Art. 15. Commanding Officers Non-Judicial Punishment
6
Department of Defense. DoDI 1332.14 – Enlisted Administrative Separations
7
The Judge Advocate General’s Legal Center and School. Practice Notes – I Do But Only in a Jurisdiction with Legal Separation
8
Office of the Law Revision Counsel. 10 US Code 843 – Art. 43. Statute of Limitations