Utah: Prenuptial Agreement Requirements

Requirements one by one

Utah uses the Uniform Premarital Agreement Act

Utah Code Title 30, Chapter 8 is the Uniform Premarital Agreement Act. The
current sections were renumbered effective September 1, 2024, so older forms
and commentary may point to obsolete section numbers even when describing a
familiar UPAA rule.

Utah also modifies the uniform enforcement test. Its current § 30-8-6 uses
execution-time fraud rather than the standard UPAA word “unconscionable.”

The agreement needs both signatures

Utah Code § 30-8-3 requires a writing signed by both prospective spouses. It
is enforceable without consideration, so no separate payment or property
exchange is required.

Sections 30-8-2 and 30-8-5 tie the agreement to the marriage. It becomes
effective when the marriage occurs.

The Act does not require notarization or witnesses

The statutory form is the signed writing. Chapter 8 does not add a notary,
acknowledgment, witness, attestation, oath, or recording requirement for basic
validity between the parties.

Separate deeds, trusts, beneficiary designations, or other instruments used to
carry out a term can have their own formalities.

Disclosure is part of a combined fraud test

Under § 30-8-6(1)(b), the challenger must establish execution-time fraud and
all three disclosure conditions: no reasonable disclosure insofar as possible,
no voluntary express written waiver of further disclosure, and no actual or
reasonably available adequate knowledge.

The waiver must be voluntary, express, and written. The statute does not say
it must be a separate document.

Utah sets no fixed counsel or timing rule

The Act does not require separate counsel, a written counsel waiver, a final-
draft review period, or a minimum number of days before the wedding.

Voluntary execution remains an independent requirement under § 30-8-6(1)(a).
The absence of fixed checkboxes does not make fraud or involuntariness
irrelevant.

Fraud, not unconscionability, is the statutory word

Utah provides two routes to nonenforcement. The first is involuntary
execution. The second requires fraud when the agreement was signed plus all
three listed disclosure failures.

The court decides fraud as a matter of law. The Act does not state a general
enforcement-time unconscionability or changed-circumstances second look.

Support waivers have a public-assistance floor

Utah Code § 30-8-4 permits modification or elimination of spousal support. Section
30-8-6(2) allows the court to order enough support to prevent the waiver from
causing public-assistance eligibility at separation or dissolution.

The override is limited to avoiding that eligibility; it is not a general
authority to rewrite every support bargain.

Child support and custody remain protected

Section 30-8-4(2) protects not only child support but also health and medical-
provider expenses, medical insurance, and child-care coverage from being
affected by the prenup.

Current Utah Code § 81-9-204(1)-(2) requires the court to decide custody and parent-
time from the child's best interests. A premarital agreement cannot replace
that later decision. Personal-rights terms also may not violate public policy
or a criminal statute.

Amendment or revocation requires a signed writing

After marriage, § 30-8-5(2) permits amendment or revocation only through a
written agreement signed by the parties. No consideration is required.

The current change rule is § 30-8-5, not § 30-8-7.

What trips people up

Utah renumbered the chapter in 2024. A form citing § 30-8-7 for amendment
is not using the current numbering.

Utah says fraud, not unconscionability. Importing the standard UPAA word
changes the actual statutory test.

The disclosure route is conjunctive. Fraud and all three disclosure
failures must be proved under § 30-8-6(1)(b).

Child medical and child-care items are expressly protected. The statute
goes beyond a short reference to “child support.”

Common questions

Does a Utah prenup need notarization?

No. The Act requires a writing signed by both parties but does not prescribe a
notary or witnesses for basic validity.

Can disclosure be waived?

Yes. The statutory alternative is a voluntary, express written waiver of
disclosure beyond what was provided. Adequate knowledge is another alternative
within the combined fraud test.

Can a Utah prenup waive alimony?

Yes, subject to the public-assistance override in § 30-8-6(2) and the general
enforcement rules.

How is the agreement changed after marriage?

Only by a writing signed by the parties. The amendment or revocation is
enforceable without consideration under current § 30-8-5(2).

Statutes and sources

• Utah Code Title 30, Chapter 8. Current Uniform Premarital Agreement Act
  chapter. Official chapter
  (accessed July 28, 2026).
• Utah Code §§ 30-8-2 through 30-8-6. Current official definition, form,
  content, effect/change, and enforcement provisions. Official enforcement
  section
  (accessed July 28, 2026).
• Utah Code § 81-9-204. Current custody best-interests rule as amended by
  signed 2026 H.B. 303. Official enrolled act
  (accessed July 28, 2026).

Disclaimer

This page is general legal information about state-law prenuptial-agreement
requirements, not legal advice about whether a particular agreement or term
is valid, fair, or enforceable. Courts apply voluntariness, disclosure,
unconscionability, public-policy, and changed-circumstances rules to specific
facts, and child support and custody remain subject to the child's interests
and the court's authority. Execution rules, counsel protections, waiting
periods, and support limits vary sharply by state. Verified against the cited
statutes and cases on the date shown; both prospective spouses should obtain
separate advice from licensed family-law counsel before signing or relying on
an agreement.