You cannot annul a divorce in the sense most people mean when they ask the question. Courts do not undo a finalized divorce as though it never happened. What you can do depends on which problem you are actually trying to solve. If the divorce itself was tainted by fraud, coercion, or a serious procedural defect, you may be able to ask the court to vacate (set aside) the decree and reopen the case. If what you really want is to erase the marriage rather than end it, that is a marriage annulment — a separate legal action with its own grounds, deadlines, and consequences. Both routes are narrow, and neither is a general-purpose do-over.
Setting Aside a Divorce Decree
Every state has a procedure for asking a court to vacate a final judgment, and a divorce decree is one. Courts treat finalized divorces with particular reluctance to disturb, so these motions succeed only in limited circumstances. The grounds most commonly recognized are:
- Fraud or misrepresentation. One spouse hid assets, lied about income, or deceived the court about material facts.
- Mistake or excusable neglect. You missed a deadline or failed to respond because of circumstances genuinely beyond your control, not carelessness.
- Duress or coercion. You were pressured or threatened into agreeing to the divorce terms.
- Void judgment. The court lacked jurisdiction over you or the marriage, making the decree legally invalid.
- Newly discovered evidence. Information surfaces that could not have been found through reasonable diligence before.
Time limits are strict. For fraud, mistake, or newly discovered evidence, most states require you to file within about one year of the judgment. For a void judgment, timing is more flexible, but you still must act within a “reasonable time.” Miss the window and the court will almost certainly deny your motion, regardless of how strong the facts are.
Even if you succeed, vacating a divorce does not restore the marriage or annul anything. It reopens the divorce case so it can be relitigated or renegotiated. The marriage existed, the proceedings happened, and the court is simply giving you another pass at a fair outcome. If your real goal is to be married to the same person again, remarrying is almost always simpler than trying to undo the decree.
Marriage Annulment Is a Different Action
A marriage annulment is not an alternative way to end a marriage. It is a court declaration that the marriage was never legally valid. After an annulment, both parties revert to unmarried status as though the wedding never occurred. A divorce acknowledges that a real marriage existed and formally terminates it. The distinction matters because annulment affects tax filings, benefit eligibility, and property rights in ways divorce does not.
Because annulment erases the marriage retroactively, courts require specific legal grounds. Regret, incompatibility, or a preference for the word “annulment” over “divorce” is not enough. The marriage must have been flawed from the start in a way the law recognizes.
Grounds for Annulment
Void Marriages
A void marriage was never legally valid, regardless of whether anyone challenges it. Bigamous marriages, where one spouse was already legally married to someone else, and incestuous marriages between close family members are the common examples. Either party can seek annulment at any time, and in most jurisdictions there is no filing deadline.
Even though a void marriage is automatically invalid, getting a court order still matters. A formal decree clarifies your legal status for property ownership, custody arrangements, and future marriage licenses.
Voidable Marriages
A voidable marriage is treated as valid until a court declares otherwise. Only the wronged party can seek the annulment, and there are usually time limits. Grounds include:
- Fraud going to the essentials of the marriage. Courts look at whether the deception strikes at the heart of the marital relationship. Misrepresenting wealth or income usually is not enough; concealing an inability to have children or a serious criminal history may qualify.
- Duress or coercion. One party was forced or threatened into the marriage.
- Mental incapacity. One or both spouses could not understand what they were agreeing to at the ceremony, whether because of mental illness, intellectual disability, or intoxication.
- Underage marriage. One or both parties were below the legal age and lacked the required parental or court consent.
- Physical incapacity. One spouse was permanently and incurably unable to consummate the marriage, and the other spouse did not know beforehand.
The fraud standard trips people up. Courts require that the deception go to the essentials of the marriage, not just that your spouse turned out to be different from who you expected. A spouse who exaggerated career success or hid credit card debt probably has not committed the kind of fraud that supports annulment.
Time Limits and the Ratification Trap
Deadlines depend on whether the marriage is void or voidable. Void marriages can be challenged at any time. Voidable marriages are different. Some states cap the filing window at two years from the date of the marriage for grounds like fraud or duress. Others allow filing at any time, as long as you have not continued living with your spouse as a married couple after discovering the problem.
That last point is critical. In many states, continuing to cohabitate after learning about the defect counts as ratification. You have effectively accepted the marriage as valid and waived your right to an annulment. If you believe you have grounds, consult a family law attorney quickly rather than waiting to see how things play out.
Filing and Proving Your Case
You begin by filing a petition for annulment in the family court where you or your spouse lives. The petition must identify a specific legal ground, not a general wish to end the marriage. Your spouse is served, has the chance to respond, and if the case is contested the court will schedule hearings. Uncontested cases move faster, but a judge still has to confirm that the legal standard is met.
The burden of proof is on the person seeking the annulment. What evidence works depends on your grounds:
- Bigamy. A certified copy of the other spouse’s prior marriage certificate, plus proof no divorce was finalized before your marriage.
- Fraud. Correspondence, financial records, medical records, or other documents showing what was concealed or misrepresented.
- Duress. Evidence of threats, coercion, or circumstances that prevented free consent.
- Mental incapacity. Medical records, expert evaluations, or testimony from witnesses who observed the person’s condition at the ceremony.
- Underage marriage. Birth certificates and proof that parental or court consent was not obtained.
Property and Support After Annulment
Property division is messier than most people expect. Because the marriage is treated as if it never existed, the equitable distribution rules that apply in divorce often do not apply. Courts generally try to return each party to their pre-marriage financial position, which sounds straightforward until you factor in joint accounts, shared mortgage payments, and years of commingled finances.
When assets and debts are tangled, courts fall back on contract law and unjust enrichment principles rather than marital property rules. You may need detailed records tracing who contributed what. In complex cases, expert testimony may be necessary to establish value and origin. Courts may order restitution if one party made significant contributions to the other’s assets while believing the marriage was real.
The “putative spouse” doctrine, recognized in a number of states, protects someone who entered the marriage in good faith, genuinely believing it was valid. If the court finds you were a putative spouse, property acquired during the relationship may be divided as if it were marital property, even though the marriage was ultimately invalid.
Spousal support usually does not survive annulment the way it does divorce, because long-term alimony cannot rest on a marriage that legally did not happen. Some jurisdictions allow temporary support during the proceedings, particularly when one party became financially dependent or gave up career opportunities believing the marriage was real. Courts weigh the equities, and a good-faith spouse is more likely to receive short-term support than one who knew about the defect all along. Child support is handled separately. Children born during an annulled marriage are treated the same as children of a divorced couple, with custody, support, and visitation decided on the best-interests standard.
Taxes, Benefits, and Immigration
An annulment creates a retroactive change in tax filing status that divorce does not. Once the court grants it, you are considered to have been unmarried for every year the marriage supposedly existed. The IRS requires amended returns (Form 1040-X) for all affected years still within the statute of limitations, generally three years from the date you filed the original return or two years from the date you paid the tax, whichever is later. You change your filing status to single or, if you qualify, head of household.1Internal Revenue Service. Publication 504 (2025), Divorced or Separated Individuals That change can produce a refund or a bill, depending on how the joint returns compared with two single returns for each year.
Social Security spousal or survivor benefits based on your spouse’s record end with the annulment, because the marriage is treated as if it never existed. The Social Security Administration allows your prior individual benefits to be reinstated as of the month the annulment decree is issued, provided you file a timely application. If the marriage was void from the start, benefits may be reinstated retroactively to the month they ended because of the marriage.2Social Security Administration. Social Security Handbook 1853 – Reinstatement of Benefits When Marriage Terminates A putative spouse may retain some eligibility depending on good-faith belief in the marriage and the law of the state where the worker was domiciled.3Social Security Administration. POMS GN 00305.085 – Putative Marriage
Health insurance coverage based on the marriage ends, just as it would with divorce. For federal employees, the ex-spouse loses coverage under the Federal Employees Health Benefits Program at midnight on the day the annulment becomes final, with a 31-day extension to arrange alternative insurance.4U.S. Office of Personnel Management. I’m Separated or I’m Getting Divorced Private employer plans follow similar patterns, with specifics and COBRA details varying by plan.
Immigration status obtained through marriage can be seriously complicated by annulment. Someone with conditional permanent residence will need to request a waiver to convert to full permanent residence without a joint petition from the spouse. Someone with an unrestricted green card is generally safe, assuming the original marriage was not fraudulent, but a later citizenship application will likely draw scrutiny because the annulment raises questions about whether the marriage was genuine. The earlier in the immigration process the annulment comes, the more vulnerable the status.
Religious Annulments Are Separate
A religious annulment and a civil annulment are entirely separate processes. A civil annulment does not produce a religious one, and a religious annulment has no effect on your legal marital status, property rights, or custody arrangements. In the Catholic Church, what people call an annulment is formally a “declaration of nullity,” decided by a Church tribunal that evaluates whether the marriage lacked an essential element such as full consent, psychological capacity, or canonical form.5United States Conference of Catholic Bishops. Annulment Other faith traditions have their own processes. If both civil and religious outcomes matter to you, the timelines, grounds, and results can differ, and working with a family law attorney and your religious authority at the same time avoids surprises.