Adultery laws in Louisiana treat infidelity as a civil matter, not a criminal one, but the civil consequences are heavy: a spouse who proves adultery can get divorced without the usual separation waiting period, and the cheating spouse is barred from receiving final spousal support under Louisiana Civil Code Article 112.
Is Adultery a Crime in Louisiana
No. Louisiana’s criminal code does not punish adultery with fines or jail. Its weight is entirely in family court, where it shapes divorce filings, alimony awards, and property disputes.
There is one group for whom infidelity does carry criminal exposure: active-duty military. Under the Uniform Code of Military Justice, adultery is prosecuted under Article 134 when the government can prove sexual intercourse, that at least one party was married to someone else, and that the conduct was prejudicial to good order and discipline or discrediting to the armed forces. The maximum punishment is a dishonorable discharge, forfeiture of all pay and allowances, and up to one year of confinement. A service member facing allegations needs military defense counsel in addition to a family lawyer, because the two tracks run on separate rules and timelines and a conviction can also affect retirement benefits.
How Adultery Changes a Divorce Filing
Louisiana Civil Code Article 103 lists five grounds for divorce, and adultery is one of them. The practical effect is that the filing spouse skips the mandatory living-apart period that a no-fault divorce requires: 180 days with no minor children, 365 days with minor children.1Justia Law. Louisiana Code Civil Code – Art. 103 Judgment of Divorce; Other Grounds
Once the evidence is presented and the court is satisfied, the divorce can proceed. There is no strategic benefit for the unfaithful spouse to drag things out, because the other party controls the timing.
What You Have to Prove
The spouse alleging adultery carries the burden. The standard is preponderance of the evidence: more likely than not that the affair happened. That is a lower bar than clear-and-convincing proof, but it still demands documentation rather than suspicion.
Courts accept text messages, emails, photographs, social media activity, financial records showing unusual spending, hotel receipts, and witness testimony. Private investigators and digital forensics are common tools. The evidence has to tie the accused spouse to an actual sexual relationship, not just a close friendship or emotional closeness.
Circumstantial proof can be enough when it points one way. Evidence that the accused spouse had both the opportunity and the inclination to commit adultery, paired with unexplained absences and unexplained spending, can carry the day. Vague accusations without records rarely do.
The Alimony Consequence
This is where adultery hits hardest financially. 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 cannot collect alimony, no matter their need or earning capacity.2Justia Law. Louisiana Code Civil Code – Art. 112 Determination of Final Periodic Support
The statute pushes further in favor of the innocent spouse. When a court grants the 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 has to show why support should not be awarded, rather than the innocent spouse building a case for need from scratch.2Justia Law. Louisiana Code Civil Code – Art. 112 Determination of Final Periodic Support
When a court sets the amount, it looks at each spouse’s income and resources, financial obligations, earning capacity, the effect of custody on the ability to work, the education or training needed to become self-supporting, 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 for domestic abuse.2Justia Law. Louisiana Code Civil Code – Art. 112 Determination of Final Periodic Support
Property Division and Dissipation Claims
Louisiana is a community property state, and the default is equal net value to each spouse.3Louisiana State Legislature. Louisiana Code 9:2801 – Partition of Community Property and Settlement of Claims Arising from Matrimonial Regimes Adultery by itself does not shift that split. A court will not hand one spouse a bigger share just because the other was unfaithful.
Where adultery does affect property is through dissipation claims. Community funds spent on an extramarital relationship, think expensive gifts, hotel stays, travel, dining, rent on a partner’s apartment, can be clawed back as waste. The innocent spouse may receive reimbursement during the property partition.
Proof means detailed financial records. Bank statements, credit card records, and receipts that trace community money into the affair are what the court wants to see. Judges weigh the nature and source of each asset, each spouse’s economic condition, and other relevant circumstances in deciding how to account for the waste.3Louisiana State Legislature. Louisiana Code 9:2801 – Partition of Community Property and Settlement of Claims Arising from Matrimonial Regimes
Does Adultery Affect Custody
Custody is decided by the best interest of the child, and adultery is not a standalone factor. Courts work through the 14 factors in Civil Code Article 134, which include love and emotional ties, ability to meet material needs, the stability of the home, and the child’s own preference when old enough to voice one.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.” That last clause does the work. An affair the child never knew about and that did not disturb daily life carries less weight than one that exposed the child to unstable situations or caused emotional harm.4Justia Law. Louisiana Code Civil Code – Art. 134 Factors in Determining Child’s Best Interest
Moving in with the new partner after separation can prompt a closer look. The court may ask whether the household is stable, whether the partner has any criminal or substance abuse history, and whether school or emotional well-being has suffered. Judges look for concrete harm, not personal disapproval.
Gathering Evidence Without Breaking the Law
Snooping through a spouse’s phone, email, or accounts can create more legal trouble than it solves. The federal Electronic Communications Privacy Act makes it illegal to intentionally intercept or access stored electronic communications without authorization. Penalties reach five years in prison, and the person whose communications were accessed can 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 hinge. A password your spouse gave you so you could pay a bill does not authorize reading their private messages, and courts evaluate consent context by context. A message that pops up on a shared computer is treated differently from a deliberate search of someone’s private accounts.
Illegally obtained evidence can also be excluded from the divorce case. The effort backfires twice: criminal and civil exposure for you, and nothing usable in court. An attorney, and where appropriate a licensed private investigator who understands these limits, is the safer route.
Covenant Marriage
Louisiana is one of a few states that offers covenant marriage, with stricter rules for entering and leaving. Adultery is still a recognized ground for divorce in a covenant marriage. The difference is that covenant couples must attempt counseling aimed at preserving the marriage before divorce, unless the grounds involve physical or sexual abuse. In an adultery-based covenant divorce, the innocent spouse may still need to complete or attempt that counseling step, even though the infidelity itself supports the divorce.6Louisiana State Legislature. Louisiana Code 9:307 – Grounds for Divorce in Covenant Marriages