Iowa
Iowa Prenuptial Agreement Laws: Requirements and Enforceability
Independently fact-checked against primary sources (last audited October 8, 2026). · 10 primary sources cited on this page. How we verify our legal content
Yes, a prenuptial agreement can be enforceable in Iowa. The Iowa Uniform Premarital Agreement Act, Iowa Code chapter 596, requires a written agreement signed by both prospective spouses, and section 596.8 sets out when a court will refuse to enforce one.
Information last verified on 2026-10-08. This article has not been reviewed by a licensed lawyer.
Jurisdiction scope: This article covers premarital (prenuptial) agreements under the Iowa Uniform Premarital Agreement Act, Iowa Code chapter 596, with a note on property division under Iowa Code 598.21(5). It does not cover postnuptial agreements, Iowa case law on premarital agreements, or other states' law. It is general information, not drafting guidance; a lawyer licensed in Iowa can draft or review these agreements.
Which Iowa law governs prenuptial agreements
Iowa's statute is chapter 596 of the Iowa Code. Section 596.3 provides: "This chapter may be cited as the 'Iowa Uniform Premarital Agreement Act'."
Under section 596.12, chapter 596 took effect on January 1, 1992, and applies to premarital agreements signed on or after that date; it does not affect the validity of agreements entered into before then. A lawyer licensed in Iowa can say which rules govern an older agreement.
Formal requirements for an Iowa prenup
Section 596.4 sets the formalities: "A premarital agreement must be in writing and signed by both prospective spouses. It is enforceable without consideration other than the marriage." Under section 596.6, the agreement becomes effective on marriage.
Section 596.4 does not list notarization or witnesses among its requirements.
When an Iowa prenup is not enforceable
Section 596.8(1) puts the burden on the person resisting the agreement: "A premarital agreement is not enforceable if the person against whom enforcement is sought proves any of the following." The grounds it lists are:
- the person did not execute the agreement voluntarily,
- the agreement was unconscionable when it was executed, or
- before signing, the person was not provided a fair and reasonable disclosure of the other spouse's property or financial obligations and did not have, or reasonably could not have had, adequate knowledge of them.
On the disclosure ground, a lack of fair and reasonable disclosure counts only when the person also did not have, or reasonably could not have had, adequate knowledge. Because the statute says "any of the following," unconscionability at signing is a separate ground in Iowa rather than one that must be paired with a disclosure failure.
Under section 596.9, "the issue of unconscionability of a premarital agreement shall be decided by the court as a matter of law." Chapter 596, as cited here, has no express clause on waiving disclosure and no requirement of independent counsel or a waiting period before the wedding.
Section 596.8(2) addresses the severability of provisions that are unenforceable.
Support: what an Iowa prenup cannot do
Iowa Code 596.5(2) provides: "The right of a spouse or child to support shall not be adversely affected by a premarital agreement."
That sentence covers both spousal support and child support. For how spousal support works in an Iowa divorce, see Iowa alimony laws.
This page does not cover whether or how a premarital agreement can address child custody in Iowa.
Revoking an Iowa prenup after the wedding
Under Iowa Code 596.7, after marriage a premarital agreement may be revoked only by a written agreement signed by both spouses, which is enforceable without consideration, or on the grounds listed in section 596.7(2) without the other spouse's consent. This page does not detail those 596.7(2) grounds.
Time limits are paused during the marriage. Section 596.11 provides: "Any statute of limitations applicable to an action asserting a claim for relief under a premarital agreement is tolled during the marriage of the parties to the agreement." Equitable defenses such as laches and estoppel remain available, so delay can still matter.
Postnuptial agreements in Iowa
This page does not cover agreements made after the wedding. Chapter 596 is Iowa's premarital agreement act, and this page does not cover an Iowa statute or case on postnuptial agreements. A lawyer licensed in Iowa can explain how an agreement signed during marriage is treated.
Iowa property division and prenups
Iowa is not a community property state. On divorce, Iowa Code 598.21(5) provides: "The court shall divide all property, except inherited property or gifts received or expected by one party, equitably between the parties." For how Iowa courts divide property, see Iowa divorce laws.
Disclaimer: This article provides general legal information about premarital agreements under the Iowa Uniform Premarital Agreement Act, Iowa Code chapter 596. It is not legal advice and is not a template. The information was verified on 2026-10-08, and the law can change. For advice about your situation, consult a lawyer licensed in Iowa.
Related
Last updated: 2026-10-08.
Frequently Asked Questions
Are prenups enforceable in Iowa?
Generally yes, under the Iowa Uniform Premarital Agreement Act, Iowa Code chapter 596. Section 596.8(1) makes an agreement unenforceable if the person resisting it proves involuntariness, unconscionability when signed, or a lack of fair disclosure where the person did not have, or reasonably could not have had, adequate knowledge.
Can a prenup waive alimony in Iowa?
Iowa Code 596.5(2) provides that the right of a spouse or child to support shall not be adversely affected by a premarital agreement.
Does a prenup have to be notarized in Iowa?
Iowa Code 596.4 requires a writing signed by both prospective spouses and does not list notarization among its requirements. A lawyer licensed in Iowa can advise on how a particular agreement is signed.
Who decides if an Iowa prenup is unconscionable?
The court decides unconscionability as a matter of law under Iowa Code 596.9.
When does an Iowa prenup take effect?
A premarital agreement becomes effective on marriage under Iowa Code 596.6.
Updates
Independently fact-checked against the cited primary sources
The Law Behind This Article
This article rests on the statutory provisions below, held in our own legal record and retrieved from the official source. Tap a section to read the operative text.
Iowa Code, Chapter 596: PREMARITAL AGREEMENTS
§ 596.8Enforcement.In force
1. A premarital agreement is not enforceable if the person against whom enforcement is sought proves any of the following: a. The person did not execute the agreement voluntarily. b. The agreement was unconscionable when it was executed. c. Before the execution of the agreement the person was not provided a fair and reasonable disclosure of the property or financial obligations of the other spouse; and the person did not have, or reasonably could not have had, an adequate knowledge of the property or financial obligations of the other spouse. 2. If a provision of the agreement or the application of the provision to a party is found by the court to be unenforceable, the provision shall be severed from the remainder of the agreement and shall not affect the provisions, or application, of the agreement which can be given effect without the unenforceable provision.
Official text (excerpt) · last checked 2026-07-29 · Read the full text in our law library · Verify at legis.iowa.gov
§ 596.4Formalities.In force
A premarital agreement must be in writing and signed by both prospective spouses. It is enforceable without consideration other than the marriage. Both parties to the agreement shall execute all documents necessary to enforce the agreement.
Official text (excerpt) · last checked 2026-07-29 · Read the full text in our law library · Verify at legis.iowa.gov
§ 596.5Content.In force
1. Parties to a premarital agreement may contract with respect to the following: a. The rights and obligations of each of the parties in any of the property of either or both of them whenever and wherever acquired or located. b. The right to buy, sell, use, transfer, exchange, abandon, lease, consume, expend, assign, create a security interest in, mortgage, encumber, dispose of, or otherwise manage and control property. c. The disposition of property upon separation, dissolution of the marriage, death, or the occurrence or nonoccurrence of any other event. d. The making of a will, trust, or other arrangement to carry out the provisions of the agreement. e. The ownership rights in and disposition of the death benefit from a life insurance policy. f. The choice of law governing the construction of the agreement. g. Any other matter, including the personal rights and obligations of the parties, not in violation of public policy or a statute imposing a criminal penalty. 2. The right of a spouse or child to support shall not be adversely affected by a premarital agreement.
Official text (excerpt) · last checked 2026-07-29 · Read the full text in our law library · Verify at legis.iowa.gov
§ 596.3Short title.In force
This chapter may be cited as the “Iowa Uniform Premarital Agreement Act”.
Official text (excerpt) · last checked 2026-07-29 · Read the full text in our law library · Verify at legis.iowa.gov
Search our full record of US law — 2.1 million sections, every state + federal →
Sources and References
- Iowa Code 596.3 (short title: Iowa Uniform Premarital Agreement Act)(legis.iowa.gov).gov
- Iowa Code 596.4 (formalities)(legis.iowa.gov).gov
- Iowa Code 596.5 (content; support rights of a spouse or child)(legis.iowa.gov).gov
- Iowa Code 596.6 (effective upon marriage)(legis.iowa.gov).gov
- Iowa Code 596.7 (revocation after marriage)(legis.iowa.gov).gov
- Iowa Code 596.8 (enforcement)(legis.iowa.gov).gov
- Iowa Code 596.9 (unconscionability decided by the court)(legis.iowa.gov).gov
- Iowa Code 596.11 (limitation of actions tolled during marriage)(legis.iowa.gov).gov
- Iowa Code 596.12 (effective date: agreements executed on or after January 1, 1992)(legis.iowa.gov).gov
- Iowa Code 598.21 (property division, including 598.21(5) equitable division)(legis.iowa.gov).gov