You can seek an annulment instead of a divorce only if your marriage had a specific legal defect at the time it began, such as bigamy, fraud, duress, mental incapacity, or underage marriage without proper consent. Courts grant annulments rarely because most marriages, however unhappy, were technically valid when they started. For couples who do qualify, the financial and legal consequences look very different from a divorce, and not always in the filer’s favor.
When Annulment Is Actually an Option
Annulment grounds split into two categories, and which one applies changes what you have to prove and when you can file.
A void marriage was never legally valid in the first place. The two most common examples are bigamy, where one spouse was already married to someone else, and incest, where the parties are too closely related by blood.1Legal Information Institute. Voidable Marriage Because these marriages were never valid, a court will grant an annulment at any time, and in some places no court action is technically required to treat the marriage as void. Getting a formal decree is still the smart move because it creates a clear record for tax, benefits, and property purposes.
A voidable marriage started out valid but can be canceled once someone proves a qualifying defect. The common grounds are:
- Fraud. One spouse made a material misrepresentation that went to the core of married life. Lies about fertility, ability to have sexual relations, pregnancy, sexually transmitted diseases, or willingness to have children have historically been strong grounds. Lies about wealth, career, or personality traits are almost never enough.
- Duress. One party was coerced through threats or force into going through with the ceremony.1Legal Information Institute. Voidable Marriage
- Underage marriage. One party was below the legal age of consent and did not have proper parental or judicial approval.1Legal Information Institute. Voidable Marriage
- Mental incapacity. One party lacked the mental ability to understand what marriage means, whether due to mental illness, developmental disability, or severe intoxication at the ceremony. For intoxication, you have to show you were so impaired you could not understand or consent, not just that you had been drinking.1Legal Information Institute. Voidable Marriage
- Non-consummation. One spouse is physically unable to have sexual relations and the other spouse did not know this before the marriage. Recognized in many but not all jurisdictions.
If none of these describes your situation, divorce is your path. An unhappy marriage, a cheating spouse, growing apart, discovering someone is not who you thought they were in a general sense: none of this supports an annulment.
Why Annulments Are Hard to Win
In a no-fault divorce, you essentially tell the court the marriage is broken and the court grants it. You do not prove wrongdoing. Annulment works the opposite way. You are asking the court to declare the marriage never existed, and the law generally favors treating marriages as valid. The burden falls entirely on you to prove, with clear and convincing evidence, that a qualifying defect existed at the time of the ceremony.
For fraud claims, judges are especially skeptical. They know fraud is easy to allege and hard to prove, and they are wary of people using annulment to sidestep the property-division rules that come with divorce. You will likely need documents, witnesses, and proof of your spouse’s inconsistent behavior. Your word alone is rarely enough. If you kept living with your spouse after discovering the fraud, the court may treat that as acceptance of the marriage and deny the petition.
Deadlines Can Close the Door
Timing matters, and the rules depend on the ground. Void marriages like bigamy and incest can be challenged at any time. Voidable marriages carry time limits that usually run from either the date of the marriage or the date you discovered the problem.
Fraud-based claims commonly have filing windows that start when you learn the truth. Underage claims often close once both parties reach the age of consent and continue living together. Physical incapacity claims may need to be filed within the first few years. Specific deadlines vary widely by jurisdiction, so check your local rules early. Miss the window and divorce is your only option.
How Annulment Differs From Divorce Financially
Because an annulled marriage is treated as though it never legally existed, the financial consequences look nothing like a divorce. Some differences help; others create unexpected problems.
Property and Spousal Support
In a divorce, courts divide marital property under community property or equitable distribution rules. In an annulment, there is technically no marital property to divide because the marriage is deemed never to have happened. Assets generally go back to whoever originally owned them. Property acquired together is typically handled under the same framework that applies to unmarried couples who split up, which offers far less protection than divorce law.
Spousal support is usually off the table for the same reason. Most courts have no basis to order one party to support the other when the marriage is treated as never having existed. This can hit hard if you left a career or made financial sacrifices during the relationship.
Taxes
Annulment forces you to file amended returns for every tax year affected by the annulled marriage that is still within the statute of limitations, generally three years from the original filing date or two years after you paid the tax, whichever is later.2Internal Revenue Service. Filing Taxes After Divorce or Separation On the amended returns you file as single or, if you qualify, head of household.3Internal Revenue Service. Publication 504 – Divorced or Separated Individuals Depending on your income during those years, that can mean owing more or getting refunds.
Social Security
Spousal and survivor benefits are generally not available based on an annulled marriage. If you were receiving benefits before the marriage and lost them when you married, an annulment can reinstate those prior benefits. For a voided marriage, reinstatement may reach back to the month benefits ended. For a voidable marriage annulled by court decree, benefits can restart from the month the annulment is issued, as long as you file a timely application.4Social Security Administration. Social Security Handbook 1853 – Reinstatement of Benefits When Marriage Terminates
Health Insurance
If you were covered under your spouse’s employer plan, an annulment ends that coverage. The federal Health Insurance Marketplace treats annulment as a qualifying life event, opening a special enrollment period.5Healthcare.gov. Loss of Coverage Letter You will typically need annulment papers showing the date coverage ended. Do not assume you can stay on a former spouse’s plan.
Protection for a Good-Faith Spouse: The Putative Spouse Doctrine
Some jurisdictions soften the harsh property result for a spouse who honestly believed the marriage was valid. The classic case is marrying someone without knowing they were already married. Under the putative spouse doctrine, courts in states that recognize it treat the good-faith spouse as entitled to property rights similar to those in a divorce.6Legal Information Institute. Putative Spouse Doctrine
Not every state recognizes the doctrine, and the details vary. Where it applies, both the putative spouse and the legal spouse share property rights, so the court divides property acquired during the invalid marriage rather than returning everything to its original owner.6Legal Information Institute. Putative Spouse Doctrine The requirement is genuine good faith. If you knew about the defect and married anyway, the doctrine does not apply. Whether it extends to spousal support in addition to property is unsettled.
Children Are Treated the Same as in a Divorce
Annulment does not affect the legitimacy of children. Every state treats children born during an annulled marriage the same as children born during a valid one. Courts determine custody, visitation, and child support based on the children’s best interests, just as in a divorce. If children are involved, expect that part of the case to look nearly identical to a divorce regardless of the annulment.
Filing, and What Happens If the Court Says No
You begin by filing a petition for annulment with the family court, identifying the specific ground. The other party has to be formally served, and the court then schedules a hearing. The burden is entirely on you to prove the ground existed at the time of the marriage. If the other side contests, the hearing resembles a trial with testimony and cross-examination.
A denial does not leave you stuck. It means the court found the marriage legally valid, so divorce becomes your path. You can file for divorce immediately after a denial, and in many jurisdictions you can convert the existing case rather than start over. Some people file for divorce as an alternative claim within the same petition, so that if the annulment fails the divorce proceeds without delay. If your evidence is thin or the ground questionable, a family law attorney can help you decide whether annulment is realistic or whether starting with a divorce filing is the more practical route.
A Note on Religious Annulment
A religious annulment is separate from a civil one. A faith community can declare your marriage null under its own rules, but that declaration has no effect on your legal marital status. The reverse is also true. If you want both, you have to pursue them through entirely different processes. Everything above describes civil annulment, the kind that changes your legal rights, taxes, and benefit eligibility.