Ohio Prenuptial Agreement Laws: When a Prenup Is Enforceable (2026)

Yes. Ohio courts enforce prenuptial (antenuptial) agreements that meet a three-part test the Supreme Court of Ohio set in Gross v. Gross, 11 Ohio St.3d 99 (1984), and applied in Fletcher v. Fletcher, 68 Ohio St.3d 464, 1994-Ohio-434. Since March 23, 2023, Ohio Revised Code (R.C.) 3103.061 sets closely similar elements in statute for postnuptial agreements and for agreements that modify or end a prenup.

Information last verified on 2026-10-08. This article has not been reviewed by a licensed lawyer.

Jurisdiction scope: This article covers the enforceability of prenuptial agreements under Ohio case law (Gross v. Gross and Fletcher v. Fletcher), postnuptial and modification agreements under R.C. 3103.06 and 3103.061, and the property-division statute R.C. 3105.171. It does not provide a template or sample terms, does not cover how child support or custody terms in an agreement are treated, and does not cover other states' law. For divorce procedure, see Ohio divorce laws.

Which law governs prenups in Ohio

Ohio's rules for premarital agreements come from decisions of the Supreme Court of Ohio. In Fletcher v. Fletcher, decided March 23, 1994, the Court stated:

"It is well settled in Ohio that public policy allows the enforcement of prenuptial agreements."

The test the Court applied comes from its earlier decision in Gross v. Gross (1984). For agreements made after the wedding, the General Assembly added R.C. 3103.061, effective March 23, 2023, which uses closely similar core elements.

The three-part test for a valid prenup

Fletcher, quoting Gross, states the three elements:

"Such agreements are valid and enforceable (1) if they have been entered into freely without fraud, duress, coercion, or overreaching; (2) if there was full disclosure, or full knowledge and understanding of the nature, value and extent of the prospective spouse's property; and (3) if the terms do not promote or encourage divorce or profiteering by divorce."

Each element is a separate requirement. An agreement signed freely can still fail on disclosure, and a fully disclosed agreement can still fail if it was signed under duress.

Who has to prove what

Fletcher splits the burden of proof between the spouses. The spouse attacking the agreement carries the burden on the first element:

"The burden of proving fraud, duress, coercion or overreaching, however, remains with the party challenging the agreement."

Disclosure works differently when the agreement is lopsided. Under the first paragraph of the Fletcher syllabus, when an agreement provides disproportionately less than the challenger would have received under an equitable distribution, "the burden is on the one claiming the validity of the contract to show that the other party entered into it with the benefit of full knowledge or disclosure of the assets of the proponent."

Independent lawyers and the Fletcher rule

The sources this page relies on do not set a flat rule that each party must have a lawyer. Fletcher instead ties the issue to lopsided agreements. The second paragraph of its syllabus states:

"When an antenuptial agreement provides disproportionately less than the party challenging it would have received under an equitable distribution, the party financially disadvantaged must have a meaningful opportunity to consult with independent counsel."

The rule speaks of a meaningful opportunity to consult, not of a requirement that counsel actually be retained. A lawyer licensed in Ohio can draft or review these agreements.

Timing: signing close to the wedding

This page found no fixed signing deadline in the sources it relies on. Timing still matters. The Supreme Court of Ohio's Prenuptial Agreements bench card (September 2024), citing Fletcher, explains that when an agreement is presented a very short time before the wedding, and postponing the wedding would cause significant hardship, embarrassment or emotional distress, "there arises a presumption of overreaching or coercion."

The bench card is a summary written for judges and is not binding law.

Spousal support terms

A court can revisit a spousal support term at the time of divorce. According to the Supreme Court of Ohio's bench card, citing Gross, "the court may modify the provision(s) set forth in the antenuptial agreement if, at the time of divorce, such provisions are unconscionable."

The bench card states that the spouse challenging the provision bears the burden, and that the court uses the spousal-support factors in R.C. 3105.18. For how Ohio courts set support, see Ohio alimony laws.

Writing, signatures and other formalities

For agreements covered by R.C. 3103.061 (agreements between spouses that alter their legal relations under R.C. 3103.05 or 3103.06, including postnuptial agreements and agreements that modify or terminate a prenup or postnup), the statute requires that "the agreement is in writing and signed by both spouses." Under R.C. 3103.061, such an agreement is valid and enforceable with or without consideration.

For a premarital agreement itself, Ohio's statute of frauds, R.C. 1335.05, provides that no action shall be brought to charge a person "upon an agreement made upon consideration of marriage" unless the agreement, or some memorandum or note of it, is in writing and signed by the party to be charged or a person that party lawfully authorized. This page does not cover notarization. A lawyer licensed in Ohio can confirm what formalities apply to a particular agreement.

Changing or ending a prenup

Ohio spouses may now change a prenup by contract. R.C. 3103.06(A)(2) allows spouses to:

"Modify or terminate an antenuptial or postnuptial agreement or any other agreement that alters their legal relations with each other;"

Under R.C. 3103.06(B), an agreement made under that section must comply with R.C. 3103.061.

Postnuptial agreements since March 23, 2023

R.C. 3103.06(A)(1), effective March 23, 2023, lets spouses "enter into a postnuptial agreement that alters their legal relations with each other." Before that date, Ohio law did not let spouses alter their legal relations by contract, except through an agreement for an immediate separation.

R.C. 3103.061 now lists the requirements for these agreements, closely tracking the Gross elements:

Agreements made before the change may not benefit from it. In Williamson v. Williamson, 2024-Ohio-1919, Ohio's Twelfth District Court of Appeals held that the 2023 amendment does not apply retroactively.

How Ohio divides property without a prenup

Ohio uses equitable division, not community property. At divorce, R.C. 3105.171(B) directs that "the court shall divide the marital and separate property equitably between the spouses, in accordance with this section." A prenup is the way couples agree in advance to different terms. For more on division at divorce, see Ohio divorce laws.

What this page does not answer

This page does not cover whether an Ohio prenup may address child support or custody, and makes no statement either way. It also does not cover drafting choices. Those are questions for a lawyer licensed in Ohio.

Disclaimer: This article provides general legal information about prenuptial and postnuptial agreements under Ohio case law and the Ohio Revised Code, not legal advice. It is not a template and does not suggest terms. The information was last verified on 2026-10-08. Laws and court decisions change. For advice about an agreement, consult a lawyer licensed in Ohio.

Related

• Prenuptial agreement laws in every state
• Ohio divorce laws
• Ohio alimony laws

Last updated: 2026-10-08.

Frequently Asked Questions

Are prenups enforceable in Ohio?

Yes, if they meet the Gross v. Gross test applied in Fletcher v. Fletcher, 1994-Ohio-434: entered freely without fraud, duress, coercion or overreaching; full disclosure or full knowledge of the other's property; and terms that do not promote or encourage divorce or profiteering by divorce.

Does Ohio require a lawyer for a prenuptial agreement?

Fletcher does not set a flat lawyer requirement. Where an agreement gives the challenger disproportionately less than an equitable division would, the financially disadvantaged party must have had a meaningful opportunity to consult independent counsel.

How far before the wedding should a prenup be signed in Ohio?

The sources this page relies on set no fixed number of days. The Supreme Court of Ohio's bench card, citing Fletcher, says an agreement presented a very short time before the wedding, where postponing would cause significant hardship, embarrassment or emotional distress, raises a presumption of overreaching or coercion.

Can a prenup waive spousal support in Ohio?

A prenup may include spousal support terms, but according to the Supreme Court of Ohio's bench card citing Gross v. Gross, a court may modify them if they are unconscionable at the time of divorce. The challenger bears the burden, and the court applies the R.C. 3105.18 factors.

Are postnuptial agreements legal in Ohio?

Yes, since March 23, 2023. R.C. 3103.06(A)(1) allows them, and R.C. 3103.061 requires a writing signed by both spouses, free consent, full disclosure, and terms that do not promote divorce. The Twelfth District held the change is not retroactive (Williamson v. Williamson, 2024-Ohio-1919).

Can you change a prenup after the wedding in Ohio?

Yes. R.C. 3103.06(A)(2) lets spouses modify or terminate an antenuptial agreement by contract, and the new agreement must comply with R.C. 3103.061.