How long you have to get a marriage annulled depends on why the marriage is invalid and which state you’re in. For marriages that break fundamental legal rules, like bigamy or marriage between close blood relatives, most states set no deadline at all. For every other ground, the window typically runs between one and four years, and when the clock starts varies: sometimes it’s the wedding date, sometimes the day you discovered the problem, sometimes the day you turned 18.
When There Is No Deadline
A void marriage is one the law treats as if it never happened. The two classic examples are marriages between close blood relatives and marriages where one spouse was already legally married to someone else. Because these unions violate basic legal requirements, courts in virtually every state will hear a challenge at any time. No statute of limitations applies.
The practical effect: if you discover years or even decades later that your spouse was already married when your ceremony took place, you can still ask a court to declare the marriage void. Some states restrict challenges after one spouse has died, but bigamy is usually carved out of even that limit. In some situations, a third party, including a family member or the state itself, can bring the challenge.
When a Deadline Applies
A voidable marriage is a different animal. It is legally valid until a court undoes it, which means the law gives you a limited window to act. Every state imposes a deadline for voidable grounds. Once that window closes, the marriage stands, and divorce becomes the only way out. The specific grounds and timeframes are below.
Fraud
Fraud is the most commonly claimed ground, and it carries a deadline in every state that recognizes it. The typical window is one to four years, and the clock usually starts when you discover the deception rather than on the wedding date. So if your spouse concealed a serious criminal history and you didn’t learn about it for three years, your filing window generally opens at the moment of discovery.
Not every lie qualifies. Courts look for misrepresentations that go to the heart of the marriage: lying about wanting children, concealing an inability to consummate the marriage, or hiding a serious addiction. Lying about income or job title usually falls short. You also have to show that you relied on the false information when deciding to marry and that learning the truth caused real harm to the relationship.
Duress or Force
When someone is coerced into marriage through threats or intimidation, the deadline typically runs from the date of the ceremony. Some states set the window at four years. Others allow the claim at any time, as long as the petitioner can demonstrate that genuine coercion occurred. If the coercion continued after the wedding, courts may adjust the timeline to account for the ongoing pressure. The question judges focus on is whether the person had the freedom to act once the threat ended.
Underage Marriage
A person who married below the legal age of consent can seek an annulment, and the filing deadline generally runs from the date they turn 18. In many states, the window is four years after reaching the age of majority. Some states set shorter periods. Once the window closes, the law treats the now-adult spouse as having accepted the marriage by remaining in it. In most jurisdictions, a parent or guardian can also file on behalf of the minor while they are still underage.
Mental Incapacity
If one spouse lacked the mental capacity to understand what marriage meant at the time of the ceremony, that spouse or their legal guardian can seek an annulment. Some states set a specific deadline. Others impose no fixed time limit but apply a different rule: if the person later regains capacity and continues living with their spouse as a married couple, courts treat that as acceptance of the marriage, which bars the annulment claim. A conservator or guardian may also bring the petition on the incapacitated person’s behalf.
Physical Incapacity
When one spouse is permanently unable to consummate the marriage and the other spouse didn’t know before the wedding, annulment is available in most states. The deadline typically runs from the date of the marriage, not from discovery, and commonly falls between two and four years. The incapacity must have existed at the time of the ceremony and must be permanent. Temporary conditions, or conditions that developed after the wedding, generally don’t qualify.
Ratification Can End Your Window Early
Even if you file within the statutory deadline, you can still lose the right to an annulment through something called ratification. Ratification happens when you discover a ground for annulment and then continue living with your spouse as though the marriage is fine. Courts read that behavior as acceptance of the marriage, and once a voidable marriage is ratified, the defect is considered legally cured.
This is where most annulment claims fall apart. Someone discovers their spouse lied about something significant, spends months agonizing while still sharing a home, and by the time they talk to a lawyer, a judge views the continued cohabitation as ratification. If you’ve found a ground for annulment, the safest course is to separate and consult an attorney promptly. Filing quickly after discovery protects both the deadline and the ratification issue at the same time. Staying puts you at risk of a judge concluding that the defect wasn’t serious enough to undo the marriage.
If You Miss the Deadline
Missing the annulment window doesn’t trap you in the marriage. Divorce is available regardless of whether the annulment deadline has passed. The practical difference matters, though. An annulment treats the marriage as if it never existed; a divorce acknowledges it was real and then ends it. That distinction affects property division, spousal support eligibility, and in some cases government benefits.
If you’ve already filed an annulment petition and the court determines your grounds are insufficient or your deadline has passed, most family courts will let you amend the petition and convert it into a divorce. Courts tend to be flexible about these amendments, especially when the alternative is starting over from scratch. The filing fees you’ve already paid typically carry over.