A Utah prenuptial agreement is a written contract that two people sign before they marry. It sets out how property, debt, and spousal support will be handled if the marriage ends in divorce or death. Utah law calls it a premarital agreement, and it takes effect only when the couple marries.[1.1]
It can cover assets either spouse owns now or acquires later, the right to manage or sell them, and what happens to them on separation, divorce, or death. It cannot reduce a child's right to support.[1.3]
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A Utah prenuptial agreement is an agreement between prospective spouses, made in contemplation of marriage and effective upon marriage. It lets a couple decide in advance who owns what, who owes what, and how spousal support will work if they later separate or divorce. Utah defines property broadly for this purpose, covering any present or future interest in real or personal property, including income and earnings.[1.1]
The agreement is a contract between the two people marrying, so it binds only them. It has no effect until the wedding takes place. If the couple never marries, there is nothing to enforce.[1.4]
A Utah prenup usually settles three things.
Prenuptial agreements are legal contracts, and courts treat them that way. Both parties should read the draft carefully, and each should consider having an attorney review it before signing.
You will see this document called a prenuptial agreement, a prenup, or an antenuptial agreement. The Utah Code uses the term premarital agreement. All three names describe the same contract.
Utah's rules for these agreements come from the Uniform Premarital Agreement Act. It now sits at Title 81, Chapter 3, Part 2 of the Utah Code. The act was renumbered into Title 81 effective September 1, 2024, so older guides citing Title 30, Chapter 8 point at the former numbering.[1.1]
Utah applies and construes this part to effectuate the part's general purpose, which is to make uniform the law with respect to the subject of this part among states enacting this uniform law.[1.8]
In practice that means Utah reads its act the same way the other adopting states read theirs.
The rules that used to sit in Title 30, Chapter 8 are now Sections 81-3-201 through 81-3-208. Check that numbering before you rely on an older article, form, or blog post.[1.1]
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A Utah prenuptial agreement must be in writing and signed by both parties. An oral promise between the couple is not enforceable, however clearly they both remember it. The agreement is also enforceable without consideration, so neither partner has to give the other anything of value to make it binding.[1.2]
Utah does not require a notary or witnesses for the agreement to be valid. Notarizing both signatures is still worth the small cost. It makes it much harder for either partner to deny signing if the agreement is challenged years later. An attorney review is worth considering if either partner owns a business or significant assets.
Under Section 81-3-203 of the Utah Code, a prenuptial agreement may deal with the following matters.[1.3]
In plain terms, the parties can agree about who keeps which assets and who carries which debts.[1.3]
A prenuptial agreement cannot touch a child's right to support, health and medical provider expenses, medical insurance, or child care coverage. Those rights belong to the child rather than to the parents, so a couple cannot bargain them away in advance.[1.3]
Spousal support has its own limit. Suppose the agreement modifies or eliminates support, and that leaves one partner eligible for public assistance at separation or divorce. A Utah court can then require the other partner to provide support to the extent necessary to avoid that eligibility, whatever the agreement says.[1.5]
A prenuptial agreement becomes effective when the couple marries. After the wedding, they can amend or revoke it only by a written agreement that both of them sign. A spoken change has no effect, and the amendment or revocation is enforceable without consideration.[1.4]
Yes. A Utah prenuptial agreement is enforceable once the couple marries, and the partner who wants out of it carries the burden of proof. A court will set the agreement aside only if that partner proves they did not execute it voluntarily. The other route is proving that the agreement was fraudulent when it was executed.[1.5]
A premarital agreement is not enforceable if the party against whom enforcement is sought proves that: (a) that party did not execute the agreement voluntarily...
The fraud route has three parts. The challenging partner must prove all of them about the period before the agreement was executed.[1.5]
In practice this means a prenup signed after a full, written exchange of financial information is very difficult to unwind. That exchange is what makes these agreements legally durable, and it is the best way to protect both people.
Whether a prenuptial agreement was fraudulent is decided by the court as a matter of law, not left to a jury.[1.5]
A void marriage is treated differently. An agreement that would otherwise have been a prenuptial agreement is then enforceable only to the extent necessary to avoid an inequitable result.[1.6]
Time limits work differently here too. Any statute of limitations applicable to a claim under a prenuptial agreement is tolled during the marriage. A claim does not quietly expire while the couple remains married.[1.7]
Most Utah prenups that fail do so for one of two reasons. One partner was rushed or pressured into signing, or one partner never learned what the other actually owned. Those are the two grounds Section 81-3-205 gives for setting an agreement aside, and both turn on the written record you leave behind. Work through the steps below well before the wedding.[1.5]
Done properly, prenuptial agreements protect both people and leave a clear legal record behind. They settle the financial terms while the couple is still on good terms, rather than leaving a judge to reconstruct them after a divorce.
Last Updated: September 2026. This guide is reviewed and updated regularly to reflect current Utah law. If you notice an error or outdated information, please contact us.
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