A marital agreement lets you decide, on your own terms, how property, debts, and support would be handled if a marriage ends. In Ohio, a prenuptial agreement is signed before the wedding and must meet standards the Supreme Court of Ohio has set, while a postnuptial agreement, signed during the marriage, has been allowed by statute only since March 23, 2023. A Cincinnati prenuptial and postnuptial agreements lawyer can help you build either document to withstand a later challenge. WSM Law drafts and reviews marital agreements for women in Cincinnati and throughout Hamilton County. Call (513) 224-5427 or contact us to schedule a free consultation.

WSM Law writes every agreement with the courtroom in mind, because an agreement is only as strong as its performance in front of a judge years later. As a litigation firm whose attorneys have handled hundreds of high-asset and high-conflict divorce and custody cases, we know how a judge will test each clause. That perspective shapes our approach to disclosure, timing, and the terms most likely to be challenged.
We represent only women, and we make no assumptions about who earns more or who brings more into the marriage. Whether you are protecting a business you built, an inheritance, or your future earnings, the agreement is written around your goals as part of our prenuptial agreement work for women.
Ohio law calls a prenup an antenuptial agreement. Property that a valid antenuptial or postnuptial agreement excludes is treated as separate property, meaning property that belongs to one spouse rather than to the marital estate, under Section 3105.171 of the Ohio Revised Code. Subjects these agreements can address include:
Without an agreement, a Cincinnati divorce leaves these questions to Ohio’s default rules for property division.
For an agreement signed before the wedding, Ohio courts apply three conditions summarized in the Supreme Court of Ohio’s guidance for judges on prenuptial agreements:
The same guidance notes that when an agreement leaves one spouse with substantially less than equitable division would provide, the spouse seeking to enforce it carries the burden of showing full disclosure or knowledge of the assets. That is why attached schedules of accounts, values, and debts matter as much as the clauses themselves. In Cincinnati, these disputes are heard by the Hamilton County Domestic Relations Court, which can hold a separate hearing on validity before the rest of the divorce goes forward.
Under Section 3103.06, spouses may, by contract with each other, enter a postnuptial agreement that alters their legal relations, modify or terminate an existing antenuptial or postnuptial agreement, or agree to an immediate separation with provisions for property and support. Section 3103.061 makes such an agreement valid and enforceable only if it is in writing and signed by both spouses and meets the same three conditions that apply to a prenup.
A postnup can address a change the couple did not plan for at the wedding, such as a new business, an inheritance, or significant debt taken on by one spouse. It is also the way to update an existing prenup.
Agreements between spouses about property and support do not control decisions about children. When an Ohio court allocates parental rights and responsibilities, Section 3109.04 requires it to take into account the best interest of the children, and Ohio law separately places a duty on parents to support their minor children. Terms about custody or child support in a prenup or postnup do not replace the court’s own decision on those issues.
The question is less about a set number of days than about pressure. Under the Supreme Court of Ohio’s standard, an agreement presented shortly before the wedding, when postponing would cause significant hardship, embarrassment, or emotional distress, creates a presumption of overreaching or coercion. Finishing the agreement well ahead of the date avoids that problem.
Ohio’s standard asks whether the spouse who would be financially disadvantaged by the agreement had a meaningful opportunity to consult with counsel. Separate counsel for each spouse is the clearest way to show that opportunity existed, and it lets each person get advice about their own interests.
A prenup can set spousal support terms, including limits, but those terms are reviewed again at divorce. If they have become unconscionable, meaning clearly unfair, by then, a court may modify them. The spouse challenging the terms has to show that effect, and the court weighs Ohio’s spousal support factors in deciding.
Whether you are engaged or years into your marriage, you deserve an agreement that reflects what you have built and holds up if it is ever tested. Call (513) 224-5427 or contact us today to schedule a free consultation with WSM Law, and work with a Cincinnati prenuptial and postnuptial agreements lawyer on terms that fit your goals.