How is Alimony Calculated in Louisiana?

Louisiana spousal support works in two stages, and each one is calculated differently. While a divorce case is pending, either spouse can ask a judge for interim spousal support — temporary payments based on need and the other spouse's ability to pay. After the divorce is final, a spouse may qualify for a second, different award called final periodic support, which is capped by law at one-third of the paying spouse's net income in most cases. Neither type follows a strict math formula. Instead, Louisiana judges work through a list of factors set out in the Louisiana Civil Code.

Louisiana also applies a rule most states dropped decades ago: to collect final periodic support, the spouse asking for it generally has to show they weren't at fault for the marriage ending. Interim support doesn't carry that same requirement. Knowing how these two types of support, the fault rule, and the one-third cap fit together is the key to understanding what a Louisiana alimony order can look like.

Interim Spousal Support — Support While the Case Is Pending

Interim spousal support is temporary. Either spouse can ask for it once a divorce case is filed, and a judge sets the amount by weighing four things under Louisiana Civil Code Article 113: the requesting spouse's needs, the other spouse's ability to pay, any interim or final child support obligation already in place, and the standard of living the couple had during the marriage.

This support doesn't run forever. It ends automatically 180 days after the divorce judgment is signed, unless a spouse asks the court to extend it and shows good cause — for example, a final support case that's still working its way through the court. A final periodic support obligation can't begin until the interim award has ended, so the two types don't overlap.

Final Periodic Support — What Happens After the Divorce

Final periodic support is the ongoing award that can follow a divorce. To qualify, Louisiana Civil Code Article 112 requires two things: the requesting spouse must be free from fault in causing the marriage to end, and they must show they need support, based on their own resources and the other spouse's ability to pay.

Once those two conditions are met, a judge weighs nine factors under Article 112(B) to decide the amount and how long it lasts.

The Freedom-From-Fault Requirement

Louisiana is one of the few states left where a spouse's own conduct can block a final support award entirely, regardless of need. If the requesting spouse is found to have been at fault in causing the marriage to break down — for example, through adultery or abandoning the marriage without a lawful reason — before the divorce was filed, they generally cannot receive final periodic support.

Fault only affects final support, not interim support. A spouse who might later be found at fault can still receive interim payments while the case is pending, because Article 113 doesn't include a fault requirement. The fault question typically gets resolved later, when a judge decides whether final support is owed at all.

The One-Third Cap — and the Domestic Abuse Exception

When a court awards final periodic support, Article 112(D) caps the amount at one-third of the paying spouse's net income. For a paying spouse who nets $6,000 a month after taxes, that means a final support order generally can't exceed $2,000 a month, no matter how the nine factors weigh out.

There's a significant exception. When a divorce is granted because the paying spouse committed a felony, physically or sexually abused the other spouse or a child, or had a protective order issued against them for abuse, the one-third cap doesn't apply. In those cases, a court can award more than one-third of net income, and can structure the award as a lump sum instead of ongoing monthly payments.

Those same fault-based or abuse-related grounds also create a presumption under Article 112(C) that the other spouse is entitled to final support in the first place — shifting the starting point in that spouse's favor rather than leaving eligibility as an open question to be argued from scratch.

How Long Does Support Last, and How Does It End?

There's no Louisiana formula tying alimony duration to years of marriage. Duration is one of the nine factors a judge weighs directly, and longer marriages with a lasting income gap tend to support longer awards, but no set number of years attaches automatically to a set length of marriage.

An existing award can be modified if either spouse's circumstances materially change — a job loss, a significant raise, a new health issue — under Civil Code Article 114. The law specifically states that a paying spouse remarrying, by itself, is not enough of a change to justify modifying the payments.

Support ends automatically under Civil Code Article 115 when the recipient remarries, when either spouse dies, or when a court finds the recipient is living with a new partner "in the manner of married persons." That cohabitation finding isn't automatic — the paying spouse has to file a motion and prove it to a judge before payments can stop on that basis.

How Taxes Work With Louisiana Alimony

Federal tax law changed for divorce agreements signed on or after January 1, 2019. Alimony payments under those agreements are not deductible for the paying spouse and are not counted as taxable income for the person receiving them. Agreements finalized before 2019 may still follow the older rule — deductible for the payer, taxable to the recipient — unless they've since been modified to adopt the new rules.

A payment of $1,500 a month costs the paying spouse $1,500 after tax and arrives to the recipient as $1,500, with no separate federal tax bill attached to it under the current rules. Our divorce financial calculator can help you model both sides of the income picture.

What to Expect If Your Case Goes to Court

Because Louisiana ties final support to a fault finding and caps the amount by law, the numbers in a contested case can hinge on facts that have nothing to do with income — who did what, and when, before the divorce was filed. Two marriages with similar finances can land in very different places depending on how the fault question is resolved.

Spouses who reach a negotiated settlement generally have more say in the outcome than leaving both the fault question and the dollar amount to a judge after a trial. For a broader look at how property division, retirement accounts, and child support work alongside spousal support in Louisiana, see our Louisiana divorce finances overview. For how duration rules compare across different states, our guide on how long alimony lasts breaks it down in plain English.