Ohio

Prenuptial and postnuptial agreements in Ohio: the old rules and the new era Prenuptial and postnuptial agreements in Ohio: the old rules and the new era

Prenuptial and postnuptial agreements in Ohio: the old rules and the new era

For decades, Ohio occupied a strange position: prenups were enforceable, but postnuptial agreements were flatly prohibited — married Ohio couples legally could not restructure their financial arrangement by contract. That ended in March 2023, when Ohio amended its statutes to permit postnups. The result is a two-regime landscape: prenups governed by decades of settled Supreme Court doctrine, postnups governed by a young statute with exacting requirements and little case law. Both are powerful. Both reward disciplined drafting. They are not interchangeable.

Prenups: Ohio's settled standards

Ohio enforces prenuptial agreements under the framework its Supreme Court set in Gross v. Gross: the agreement must be entered freely without fraud, duress, coercion, or overreaching; with full disclosure or full knowledge of the other's assets; and its terms must not promote or encourage divorce or profiteering by divorce.

Two Ohio refinements matter enormously in practice. First, overreaching does real work — Ohio courts scrutinize the circumstances of signing, and the eve-of-wedding presentation with no chance for counsel invites invalidation. Second, Ohio treats spousal support provisions differently from property provisions: support waivers must be conscionable at the time of enforcement, meaning a support term fair at signing can fail decades later if circumstances have transformed. Property terms get no such second look. Drafting around that asymmetry — sunset clauses, tiered support terms, escalators — is exactly the craft that separates durable Ohio prenups from future exhibits.

Postnups: the 2023 opening

Amended ORC 3103.06 now permits spouses to enter agreements during marriage — including agreements that alter their legal relations upon divorce — if the agreement is: in writing and signed by both; entered into freely without fraud, duress, coercion, or overreaching; made with full disclosure or full knowledge of property and obligations; and not entered in anticipation of an imminent divorce action already decided upon (the statute polices attempts to game a pending split).

What the new tool is for: updating a stale prenup, protecting a business that took off mid-marriage, resolving financial friction without ending the marriage, coordinating with estate plans after an inheritance, papering a reconciliation. What it isn't: a unilateral instrument. Every requirement above is a litigation hook, the doctrine is young, and courts will read early postnups hard. Independent counsel for both spouses isn't a nicety here — it's structural.

Neither instrument can bind Ohio courts on child custody or child support. Children's issues are decided when they arise, on the child's interests.

Drafted by the people who litigate them

Brown Carrington drafts Ohio agreements against every attack in the Ohio reporter — and we've been putting the postnup statute to work since it arrived.

Straight answers.

Are Ohio prenups enforceable?

Yes, under long-settled standards — with support provisions re-tested for conscionability at enforcement. Build for time.

Are postnups really valid in Ohio now?

Since March 2023, yes — by statute, with strict formation requirements. This is the newest instrument in Ohio family law; draft accordingly.

Can we fix our outdated prenup now that postnups are legal?

That's one of the new statute's best uses — amending or replacing a stale prenup mid-marriage, properly papered with fresh disclosure.

How close to the wedding can we sign a prenup?

No statutory deadline — but Ohio's overreaching doctrine punishes compressed timelines. Months out, both represented: that's the standard that survives.