How to Get a Marriage Annulment in Ohio: Grounds and Time Limits

To get a marriage annulment in Ohio, you file a Complaint for Annulment in the Domestic Relations Division of the Court of Common Pleas and prove to the judge that one of six statutory grounds under Ohio Revised Code Section 3105.31 existed at the time of your wedding. You carry the burden of proof, you must file within the deadline that applies to your ground, and if you kept living with your spouse after the problem came to light, you may have already given up the right to annul.¹

An annulment is not a shortcut divorce. A divorce ends a marriage the law considers valid; an annulment declares the marriage was legally defective from the start.² A short marriage, buyer’s remorse, or a spouse who turned out to be disappointing will not qualify. You need a specific legal defect from day one.

Do You Have a Qualifying Ground?

Ohio recognizes exactly six grounds. If none of these fits, the court cannot annul your marriage, no matter how sympathetic the situation.¹

Underage marriage. One spouse was below Ohio’s legal marriage age at the ceremony. Ohio currently requires both parties to be at least 18, though 17-year-olds may marry with juvenile court approval.
Bigamy. One spouse was already legally married to someone else when the ceremony took place, and that prior marriage was still in effect.
Mental incompetence. One spouse had been legally declared mentally incompetent at the time of the marriage.
Fraud. One spouse’s consent was obtained through deception about something fundamental to the marriage. Courts look for fraud that goes to the core of the marital relationship, not general dishonesty.
Force or duress. One spouse was coerced into the marriage.
Non-consummation. The couple never had sexual relations after the ceremony, despite the marriage being otherwise valid.

How Long You Have to File

Ohio Revised Code Section 3105.32 sets strict deadlines, and missing yours bars the claim permanently, regardless of how strong your evidence is.³

Underage marriage: within two years after the underage spouse reaches the legal marriage age.
Bigamy: no deadline. Either spouse, or the spouse from the earlier marriage, can file at any time during the parties’ lives.
Mental incompetence: before either party dies. A guardian may file on behalf of the affected person.
Fraud: within two years after you discover the fraud.
Force or duress: within two years of the marriage date.
Non-consummation: within two years of the marriage date.

If your window has closed, divorce is your only remaining option.

The Cohabitation Rule That Ends Most Cases

For every ground except bigamy and non-consummation, Ohio law includes a waiver built into the statute: if you continued living with your spouse as a married couple after the problem was resolved or discovered, you have given up the right to annul.¹

An underage spouse who keeps living with the other person after turning 18 waives the annulment.
A person declared incompetent who regains competency and stays in the marriage waives it.
A spouse who discovers fraud and continues cohabiting waives it.
A spouse who was coerced but later voluntarily lives with the other as a married couple waives it.

This is where valid cases fall apart. People learn about a ground for annulment but don’t separate right away, thinking they can address it later. By the time they file, they’ve already forfeited the option.

Evidence to Gather Before You File

The evidence you need depends on which ground you’re claiming:

Underage marriage: birth certificates showing the spouse’s age at the ceremony, plus the marriage certificate with the date.
Bigamy: a certified copy of the prior marriage certificate, plus proof no divorce or death dissolved it before your ceremony.
Mental incompetence: court records of the adjudication of incompetency and the dates showing it was in effect at the time of the marriage.
Fraud: documentation of the specific misrepresentation and when you learned the truth. These cases are the hardest to prove because the deception has to be material to the marriage itself.
Force or duress: records, communications, or witness statements showing coercion. Testimony often carries these cases.
Non-consummation: testimony from one or both parties. Medical evidence can help but is not always required.

Also collect the basic marriage details: date and place of the ceremony, both parties’ full legal names, and information about any children born during the marriage.

Filing the Complaint

File a Complaint for Annulment with the Domestic Relations Division of your county’s Court of Common Pleas.⁴ Most county courts post the complaint form on their website, with separate versions depending on whether children are involved.⁵ The complaint has to name the specific statutory ground and include enough factual detail to support it. Sign it in front of a notary before you submit.

Filing fees vary by county, but budget around $350.⁴ If you can’t afford it, ask the court for a fee waiver by filing an affidavit of indigency.

Serving Your Spouse

After filing, the court has to notify the other party through service of process. Under the Ohio Civil Rules, certified mail is the default; you can also request personal service through the sheriff or a private process server.⁶ You tell the clerk which method to use by filing a service precipe. If your spouse actively avoids service, you may eventually have to request service by publication, meaning notice printed in a local newspaper.

The Hearing

Once your spouse has been served, the court schedules a hearing. Both sides can present evidence and testimony. You carry the burden of proof and have to convince the judge that the ground you claimed actually existed at the time of the marriage. If the evidence is sufficient, the court issues a decree of annulment. If not, the marriage remains legally intact and you would have to pursue a divorce.

What About Children?

An annulment does not make your children illegitimate. Ohio law protects children born during an annulled marriage, and the court will address custody, parenting time, and child support inside the annulment proceeding, essentially the way it would in a divorce. If you have children, use the complaint form that includes provisions for them and be ready to propose a parenting plan.

Property, Debt, and Spousal Support

This is where annulment gets financially awkward. Because the court treats the marriage as though it never legally existed, Ohio’s equitable property division rules and spousal support statute do not apply.² The court generally tries to return each party to their pre-marriage financial position. Assets go back to whoever originally owned them. Debts revert to whoever incurred them.

That works cleanly on paper and messily in real life. If you co-signed a mortgage or opened joint credit accounts, the creditor doesn’t care that your marriage was annulled. You’re still on the hook. The court has limited tools to divide joint obligations equitably in an annulment. If you and your spouse accumulated significant shared assets or debts, talk to an attorney before choosing between annulment and divorce. An annulment can feel like a cleaner emotional outcome and still leave you worse off financially than a divorce would.

The Tax Consequence to Plan For

An annulment creates a retroactive tax problem. Because the marriage is treated as never having existed, the IRS requires amended returns for every affected tax year still open under the statute of limitations, generally three years from the date you filed or two years from the date you paid the tax, whichever is later.⁷ On each amended return, you change your filing status from married filing jointly (or married filing separately) to single, or head of household if you qualify.⁸

Single filers generally have less favorable brackets and a lower standard deduction than married couples filing jointly, so switching status often produces additional tax owed, plus interest. If you filed joint returns for several years, the total can be meaningful. Talk to a tax professional before finalizing the annulment so you know what you’re walking into.

1
Ohio Legislative Service Commission. Ohio Revised Code 3105.31 – Causes for Annulment
2
Supreme Court of Ohio. Termination of Marriage
3
Ohio Legislative Service Commission. Ohio Revised Code Section 3105.32
4
Greene County, Ohio. Pro-Se Guide to Annulment
5
Hamilton County Court of Domestic Relations. Complaint for Annulment Without Children
6
Butler County Clerk of Courts. Service of Process
7
Internal Revenue Service. Filing Taxes After Divorce or Separation
8
Internal Revenue Service. Publication 504 – Divorced or Separated Individuals