Adultery is not a crime in Louisiana. The state’s criminal code imposes no fines and no jail time for infidelity by civilians. Its legal weight is entirely civil, and it lands hardest in divorce court: a spouse who proves adultery can end the marriage without any separation waiting period, and the unfaithful spouse loses the ability to collect final spousal support. The one exception to the “not a crime” rule involves active-duty military personnel, who can be prosecuted under a separate federal system.
What Adultery Actually Does in Louisiana Law
Because Louisiana treats infidelity as a civil matter rather than a criminal one, you will not see a prosecutor charge someone with adultery. There is no statute to charge under. What the law does instead is give the faithful spouse leverage inside the divorce process and cut off certain rights of the unfaithful spouse. The consequences are financial and procedural, not carceral.
Adultery as Grounds for Divorce
Louisiana Civil Code Article 103 lists adultery as one of five grounds for divorce. A spouse who files on that ground can obtain a judgment with no mandatory separation period.1Justia Law. Louisiana Code Civil Code – Art. 103 Judgment of Divorce; Other Grounds Compare that with a no-fault divorce, which requires the couple to live apart for 180 days without minor children, or 365 days with them. Proving adultery collapses that timeline.
The burden falls on the accusing spouse, and the standard is preponderance of the evidence: the court must find it more likely than not that the affair occurred. Courts accept text messages, emails, photographs, social media activity, financial records, hotel receipts, and witness testimony. Some spouses engage private investigators. Circumstantial evidence works when it points strongly in one direction, for example opportunity plus inclination plus unexplained absences and spending, but vague accusations without documentation rarely succeed. The evidence has to connect the accused spouse to a sexual relationship, not just a close friendship.
The Spousal Support Penalty
This is the heaviest civil consequence. Under Louisiana Civil Code Article 112, a spouse must be “free from fault” to receive final periodic support. A spouse who committed adultery fails that test and is barred from collecting alimony, no matter their financial need or earning capacity.2Justia Law. Louisiana Code Civil Code – Art. 112 Determination of Final Periodic Support
The statute also tilts in favor of the innocent spouse. When a court grants a divorce specifically because of adultery under Article 103(2), the spouse who obtained the divorce is presumed entitled to final periodic support. The adulterous spouse then carries the burden of showing why support should not be awarded.2Justia Law. Louisiana Code Civil Code – Art. 112 Determination of Final Periodic Support
When a court sets an amount, it weighs each spouse’s income and resources, existing financial obligations, earning capacity, custody effects on the ability to work, education and training needed for self-support, health and age, and the length of the marriage. The total award cannot exceed one-third of the paying spouse’s net income, with limited exceptions in domestic abuse cases.2Justia Law. Louisiana Code Civil Code – Art. 112 Determination of Final Periodic Support
Community Property and Dissipation Claims
Louisiana is a community property state, and the default rule is that marital assets and liabilities are divided so each spouse receives property of equal net value.3Louisiana State Legislature. Louisiana Code 9:2801 – Partition of Community Property and Settlement of Claims Arising from Matrimonial Regimes Adultery by itself does not change that split. A court will not hand one spouse a larger share simply because the other cheated.
What adultery can trigger is a dissipation claim. If a spouse spent community funds on the affair, whether on gifts, hotels, travel, dining, or rent for a partner’s apartment, the other spouse can seek reimbursement for the waste. Louisiana courts treat these expenditures as a misuse of community assets. Proving dissipation takes detailed financial documentation: bank statements, credit card records, and receipts that trace community money to the relationship. The court considers the nature and source of each asset, the economic condition of each spouse, and other relevant circumstances when accounting for the loss.3Louisiana State Legislature. Louisiana Code 9:2801 – Partition of Community Property and Settlement of Claims Arising from Matrimonial Regimes
How Custody Is Affected
Custody in Louisiana turns on the best interest of the child, and adultery is not a standalone factor. Courts evaluate 14 factors under Civil Code Article 134, including each parent’s emotional ties with the child, ability to provide for material needs, the stability of the home environment, and the child’s own preferences if old enough to express them.4Justia Law. Louisiana Code Civil Code – Art. 134 Factors in Determining Child’s Best Interest
The relevant factor is “the moral fitness of each party, insofar as it affects the welfare of the child.” The qualifier does the work. A parent’s affair does not automatically count against them. The court asks whether the infidelity harmed the child or created an unstable environment. An affair the child never knew about carries less weight than one that exposed the child to inappropriate situations or caused emotional harm.4Justia Law. Louisiana Code Civil Code – Art. 134 Factors in Determining Child’s Best Interest
Cohabitation with a new partner after separation can raise additional questions. If a parent moves in with the person from the affair, the court may look at whether the household is stable, whether the partner has a history of criminal activity or substance abuse, and whether the arrangement disrupts the child’s school performance or emotional well-being. Courts want concrete evidence of harm rather than disapproval of the parent’s choices.
The Military Exception: When Adultery Is a Crime
If either spouse is an active-duty service member, the civilian rule does not apply. Under the Uniform Code of Military Justice, adultery is a criminal offense prosecuted under Article 134. The government must prove three elements: that the service member had sexual intercourse with someone, that one of the two was married to someone else at the time, and that the conduct was prejudicial to good order and discipline or brought discredit on the armed forces.
The maximum punishment is a dishonorable discharge, forfeiture of all pay and allowances, and up to one year of confinement. Single service members can also face charges if the person they were involved with was married. Commanders weigh rank, the effect on unit morale, whether the conduct continued after counseling or orders to stop, and whether government resources were misused. A conviction or adverse administrative action can also affect military retirement benefits, which are often a major asset in a military divorce. A service member facing adultery allegations should consult a military defense attorney alongside family law counsel, since the two proceedings run on different rules and timelines.
Gathering Evidence Without Committing a Federal Crime
Adultery may not be a crime in Louisiana, but the way you prove it can be. The federal Electronic Communications Privacy Act makes it illegal to intentionally intercept or access stored electronic communications without authorization. Violations carry penalties of up to five years in prison, and the person whose communications were accessed can also sue for damages, attorney’s fees, and punitive damages.5Office of the Law Revision Counsel. 18 USC 2511 – Interception and Disclosure of Wire, Oral, or Electronic Communications Prohibited
Authorization is the key. If your spouse gave you a password to pay a bill, using that same password to read private messages goes beyond the authorized purpose and can violate the statute. Courts evaluate consent case by case, and implied consent in one context does not extend to all contexts. A message that pops up on a shared computer is treated differently from a deliberate search through someone’s private accounts. Evidence obtained illegally may also be inadmissible in the divorce, so the effort can backfire twice. If you suspect an affair, work with an attorney on lawful evidence-gathering methods, including licensed private investigators who understand the limits.
Covenant Marriage: Same Ground, Extra Step
Louisiana is one of a handful of states that offers covenant marriages, which apply stricter rules to both entering and leaving a marriage. Adultery is a recognized ground for divorce in a covenant marriage, just as in a standard one. The practical difference is that covenant couples must also participate in counseling aimed at preserving the marriage before a divorce can proceed, unless the grounds involve physical or sexual abuse. For an adultery-based divorce in a covenant marriage, the innocent spouse may still need to attempt that counseling step, even though the infidelity itself is sufficient to end the marriage.6Louisiana State Legislature. Louisiana Code 9:307 – Grounds for Divorce in Covenant Marriages