Is Adultery Grounds for Divorce in Utah?

Finding out your spouse has been unfaithful upends everything at once: your marriage, your finances, your sense of what the last several years even were. Somewhere in the fog, a practical question surfaces. Is adultery grounds for divorce in Utah, and does it actually change anything about how the divorce comes out?

The short answer is yes, adultery is a legal ground for divorce here, and yes, it can matter, mostly on the money side. This guide walks through what Utah law really says about infidelity, when it makes sense to raise it, and when it doesn't. The rules are the same whether your case lands in the Fourth District Court in Provo, the Third District in Salt Lake City, or up in Summit County, so this applies wherever you are along the Wasatch Front.

Can You File for Divorce Based on Adultery in Utah?

Yes. Utah Code § 81-4-405 lists adultery committed after the marriage as one of Utah's fault-based grounds for divorce, alongside grounds like desertion, habitual drunkenness, and cruel treatment.

The same statute also lists irreconcilable differences, which is Utah's no-fault ground. That option means you never have to prove anyone did anything wrong to get divorced; you only have to tell the court the marriage can't be saved. Nearly every Utah divorce, including most divorces that started with an affair, gets filed on irreconcilable differences.

Should You File on Adultery or Irreconcilable Differences?

For most people, irreconcilable differences is the better path even when the adultery is real and provable. Filing no-fault doesn't erase the affair; it just means you don't have to prove it to end the marriage.

Here's the part that surprises people: you can file on irreconcilable differences and still put the affair in front of the judge where the law makes it relevant, like alimony. Fault filing, on the other hand, commits you to proving the adultery, which means more discovery, more conflict, and more fees for a divorce you'd receive anyway. It's one of several points where common assumptions and Utah law part ways, and we cover more of those in our post on myths about divorce in Utah.

A pattern we see often in Utah County consultations is a spouse who arrives determined to file on adultery because it feels like the truth deserves a label, then reconsiders after seeing what fault litigation adds in cost and exposure while changing little about the outcome. There's no wrong answer, but it should be a strategy decision, not just an emotional one.

How Does Adultery Affect Alimony in Utah?

This is where an affair carries real legal weight. A judge may reduce or deny alimony to a spouse whose adultery helped end the marriage.

Utah Code § 81-4-501 defines fault to include engaging in sexual relations with someone other than your spouse, when that conduct substantially contributed to the breakup of the marriage. And § 81-4-502, which governs alimony, says the court may consider the parties' fault in deciding whether to award alimony and on what terms. The phrase "substantially contributed" does real work here. An affair that ended a functioning marriage weighs differently than one that happened after the marriage had already collapsed, and judges look at the whole timeline.

Fault is one factor among several, though. Need, earning capacity, the length of the marriage, and the standard of living during it still drive most alimony decisions, and our guide on how alimony is determined in Utah walks through those factors in detail.

Does Adultery Affect Property Division or Child Custody?

Usually not, with two exceptions worth knowing. Utah divides marital property equitably regardless of who ended the marriage, and custody turns on your children's best interests, not on punishing a cheating spouse.

The property exception is dissipation. If marital money funded the affair, think trips, gifts, rent on a second apartment, courts can account for that spending and effectively make the unfaithful spouse pay it back in the division. Bank and card statements matter a lot here. On custody, the best-interest factors in § 81-9-204 include a parent's past conduct and moral character, but judges care about how conduct affected the kids, not about the affair itself. An affair the children never knew about rarely moves custody; introducing a new partner mid-case, or exposing the kids to conflict over it, can.

How Do You Prove Adultery in a Utah Divorce?

You don't need a confession or a photograph. Divorce is a civil case, so adultery can be proven by a preponderance of the evidence, and circumstantial evidence like messages, financial records, and witness testimony is enough.

The formal tools do most of the work: discovery requests, subpoenas for records, and depositions taken under oath. What you should not do is self-help surveillance. Logging into your spouse's accounts, planting a tracker, or recording them secretly can violate state and federal law and can turn you from the wronged spouse into the one explaining yourself to the judge. Bring what you already lawfully have, texts sent to you, statements from joint accounts, your own observations, and let your Utah divorce attorney gather the rest the right way.

Frequently Asked Questions About Adultery and Divorce in Utah

Q: Is adultery a crime in Utah?

A: Not anymore. Utah repealed its criminal adultery statute, former § 76-7-103, in 2019. Today adultery has no criminal consequences in Utah; its effects show up only in the divorce case, mainly through alimony and dissipation arguments.

Q: Does it count as adultery if we were already separated?

A: Legally you're married until the decree is signed, so a new relationship during separation is technically adultery. Practically, it carries less weight, because the question judges ask is whether the conduct substantially contributed to the breakup. A relationship that began after you separated usually didn't cause the split, but it can still complicate your case, so talk to your attorney before dating.

Q: Will I get a bigger share of the property because my spouse cheated?

A: Not automatically. Utah courts divide marital property based on fairness, not fault. The exception is marital money spent on the affair, which the court can charge back against the spouse who spent it.

Q: Can the details of the affair be kept out of public court records?

A: Often, yes. When fault is at issue, Utah law allows the court to close the proceedings and seal the record. If privacy matters to you or your kids, ask for it; this protection isn't automatic.

Q: Do I need proof of the affair before I file?

A: No. Most people file on irreconcilable differences, which requires no proof of anything. If fault becomes relevant to alimony, the evidence gets developed later through discovery.

Talk to a Utah Family Law Attorney

An affair leaves you making legal decisions at the exact moment you're least equipped to make them calmly. You don't have to sort out alone which parts of what happened matter to a judge and which parts only matter to you. Both deserve attention; they just belong in different rooms.

Fox Law Utah represents spouses on both sides of infidelity cases across Salt Lake, Utah, and Summit Counties, and our flat-fee pricing keeps the cost of your divorce predictable from the start. Contact Fox Law Utah today at 801-251-6124 or through our contact form at https://www.foxlawutah.com/contact-us to schedule a consultation.

About the Author

Andrew Fox is a Utah family law attorney and the founder of Fox Law Utah. He represents clients in divorce, custody, and support matters across Salt Lake, Utah, and Summit Counties.

This article is for informational purposes only and does not constitute legal advice. Every family law case is unique. Contact Fox Law Utah for guidance specific to your situation.