How Ohio handles spousal support
Ohio courts call it "spousal support," and unlike Illinois or New York, the state legislature never wrote a calculation formula into law. Ohio Revised Code §3105.18 gives judges broad discretion, guided by an explicit list of factors rather than any percentage-based math. That makes any number produced by an online calculator for Ohio a non-statutory estimate by definition — useful for framing a conversation with an attorney, but not a stand-in for how a specific judge in a specific county will actually rule.
The governing factor list, verified directly against the official statute text at codes.ohio.gov, is Ohio Rev. Code §3105.18(C)(1)(a) through (n) — fourteen factors in total. They cover the income of the parties from all sources (including income from property divided in the case), the relative earning abilities of the parties, the ages and physical, mental, and emotional conditions of the parties, retirement benefits, the duration of the marriage, whether it would be inappropriate for a custodial parent to work outside the home given a minor child of the marriage, the standard of living established during the marriage, the relative extent of each party's education, the relative assets and liabilities of the parties (including court-ordered payments), the contribution of each party to the other's education, training, or earning ability — including contribution to a professional degree — the time and expense needed for the requesting spouse to acquire education, training, or job experience for appropriate employment, the tax consequences of a support award for each party, the lost income-production capacity of either party resulting from marital responsibilities, and a final catch-all for any other factor the court expressly finds relevant and equitable.
Duration works the same way — there is no statutory formula. §3105.18(C)(2) leaves the length of an award entirely to the court, which may set a specific term or leave support open-ended. In practice, Ohio family-law practitioners commonly describe an informal benchmark of roughly one year of spousal support for every three years of marriage — for example, around five years of support following a fifteen-year marriage — with marriages stretching past roughly 25 years sometimes resulting in indefinite support. It's important to be precise about what this is: it is a practitioner rule of thumb, not a rule written anywhere in §3105.18. There is no codified duration table in Ohio law, and any duration figure this calculator shows for Ohio should be read with that caveat front and center.
Ohio does not set a minimum marriage-length requirement for spousal-support eligibility. Marriage duration is simply one of the 14 factors weighed alongside everything else — a short marriage doesn't automatically disqualify a spouse from support, it just tends to shrink the practical outcome under the informal duration benchmark above.
On fault, the statute is notably silent. After reading the complete official §3105.18(C)(1) text, none of the fourteen enumerated factors mentions adultery, marital misconduct, or fault of any kind. Every factor is financial, needs-based, or equity-based — income, earning ability, age and health, retirement benefits, marriage length, custodial-parent employment impact, standard of living, education, assets and liabilities, contributions to the other spouse's earning ability, time and expense to become employable, tax consequences, and lost income capacity, plus the general equity catch-all in factor (n). A court could theoretically weigh misconduct under that catch-all provision, but fault is not a named, mandatory consideration the way it is under Texas, Pennsylvania, or Michigan law — and it is explicitly not the kind of automatic bar seen in Georgia or North Carolina.
No major legislative overhaul of Ohio's spousal-support framework was identified for the 2023–2026 period; §3105.18 remains stable heading into 2026 proceedings. Statute citation: Ohio Rev. Code §3105.18.
Frequently Asked Questions
Does Ohio have an alimony formula?
No. Ohio has no statewide calculation formula for spousal support amount or duration. Courts weigh the 14 factors listed in Ohio Rev. Code §3105.18(C)(1) and set an amount and term they consider equitable. Any number this calculator produces is a non-statutory planning estimate, not a legal formula.
How long does spousal support last in Ohio?
There's no statutory duration formula — §3105.18(C)(2) leaves the term to the court's discretion, for a specific period or indefinitely. Ohio practitioners commonly cite an informal, non-codified rule of thumb of roughly one year of support per three years of marriage, with marriages exceeding about 25 years sometimes resulting in indefinite support.
Does adultery affect alimony in Ohio?
Fault is not one of the 14 enumerated factors in §3105.18(C)(1). All 14 factors are financial, needs-based, or equity-based. A court could theoretically consider misconduct only under the general catch-all factor (n), but it is not a named or mandatory factor the way it is in some other states.
Is there a minimum marriage length to get spousal support in Ohio?
No minimum marriage-length threshold was identified in Ohio law. Marriage duration is one of the 14 §3105.18(C)(1) factors, but it is not a gate on eligibility itself.
Is this Ohio alimony calculator legal advice?
No. It's a non-statutory educational estimate. Ohio judges have broad discretion under §3105.18, and only a licensed Ohio family-law attorney can tell you what an actual court is likely to order in your case.