This guide is general legal information, not legal advice, and does not create an attorney–client relationship. Rules change and vary by state — verify current requirements with official sources or a licensed attorney.
Most people who ask about annulment want the same thing: a clean exit from a marriage that felt like a mistake, without the word "divorce" attached. That is not what annulment does. An annulment is a judicial finding that the marriage was legally defective from the beginning — that something about how or why it was formed meant it never validly existed. Regret, brevity, and incompatibility are not defects. They are grounds for divorce.
The Legal Information Institute puts the core point plainly: unlike divorce, "the effect of declaring a marriage void is retroactive," meaning the marriage was void when it was entered into. Because marriage validity is set by state law, each state writes its own list of grounds, its own filing deadlines, and its own rules about what happens to property and children afterwards. The concepts below travel; the details do not.
Key takeaways
- Annulment requires a defect that existed at the time of the marriage — bigamy, close blood relation, underage marriage, incapacity, fraud, or coercion are the usual candidates.
- Void marriages were never valid; voidable marriages are valid until a court says otherwise and can often be ratified by continuing to live as spouses after the defect is discovered.
- Deadlines are short in many states for voidable grounds, and delay can forfeit the claim entirely.
- Children of an annulled marriage keep their legal parentage and their right to support; annulment does not undo parentage.
- A religious annulment has no civil legal effect, and a civil annulment has no religious effect — they are separate processes with separate standards.
What an annulment actually declares
A divorce says: this marriage was valid, and it now ends. An annulment says: this was never a valid marriage. Some states call the resulting judgment a "declaration of invalidity" or a "decree of nullity," which describes the function more accurately than the word annulment does.
That retroactive character explains most of what follows. Because the law treats the marriage as never having existed, the standard divorce remedies do not automatically apply — unless the state has statutes supplying them anyway, which many do.
Void and voidable: the distinction that controls everything
Every state's annulment law rests on this split, even where the terminology differs.
| Feature | Void marriage | Voidable marriage |
|---|---|---|
| Legal status | Invalid from the outset; no valid marriage ever existed | Valid and fully effective until a court annuls it |
| Typical grounds | Bigamy (an undisclosed prior marriage), incest or prohibited degree of kinship | Fraud, duress, lack of capacity to consent, underage without required consent, concealed inability to consummate |
| Who may challenge | Often either spouse, and sometimes a third party or the state | Generally only the injured spouse |
| Can it be ratified? | No — continued cohabitation does not cure it | Yes — living together as spouses after learning of the defect usually ratifies the marriage |
| Deadline | Often no deadline, or a long one | Frequently short, running from discovery of the defect |
| Court decree needed? | Not strictly required in theory, but a declaratory judgment is strongly advisable | Required — the marriage stands until annulled |
Watch the deadline: Ratification is where most voidable-ground cases fail. A spouse who discovers the fraud in March and continues living with the other spouse through the summer has usually forfeited the ground, even if nothing else about the case is weak. Moving out and filing promptly is the practical rule.
The grounds states commonly recognise
The Legal Information Institute lists fraud or coercion, an undisclosed prior marriage, incest, being underage at the time of marriage, and a temporary incapacity that prevented understanding the marriage as recurring grounds. Expanding on each:
- Bigamy. One spouse was already married. This is the cleanest ground because it is documentary — a prior marriage certificate with no corresponding divorce decree ends the analysis.
- Prohibited relationship. The parties are related within the degrees of kinship the state forbids. The prohibited degrees themselves differ by state, particularly for cousins.
- Age. One party was below the state's minimum marriage age, or below the age at which parental or judicial consent was required and did not have it. Minimum-age statutes have changed in many states over the past decade, so the rule that matters is the one in force on the wedding date.
- Incapacity to consent. Mental incapacity, or intoxication severe enough that the person could not understand what they were doing. Courts set this bar high; "we had been drinking" is not enough on its own in most states.
- Fraud going to the essence of the marriage. The most litigated and most misunderstood ground. Lying about wealth, employment history, or personality does not usually qualify. Concealing an existing pregnancy by another person, a secret intention never to have children where children were agreed, a hidden inability to have sexual relations, or marrying solely to obtain an immigration benefit are the sorts of misrepresentations courts have found sufficient — and the standard is state-specific.
- Duress or coercion. Consent obtained by threat or force. Genuine cases exist but are rare, and the pressure must be more than family disapproval or social expectation.
Notice what is absent: no state annuls a marriage because it lasted only weeks, because it was unconsummated by choice, because it happened in Las Vegas, or because the couple never lived together. Those facts may support the story behind a real ground, but they are not grounds themselves. A short marriage with no assets and no children usually resolves faster through the simplified divorce tracks described in our comparison of contested and uncontested divorce.
How the process runs
Annulment is a civil action filed in the same court that handles divorce, and it follows a similar procedural spine with two important differences: the burden of proof and the evidence required.
- Confirm jurisdiction and residency. States apply residency requirements to annulment as they do to divorce, though some are shorter.
- File a petition specifying the ground. Unlike a no-fault divorce petition, this pleading must identify a statutory ground and the facts supporting it.
- Serve the other spouse. Ordinary service rules apply, including alternative service where a spouse cannot be located — common in bigamy and marriage-fraud cases.
- Prove the ground. Many states require clear and convincing evidence, a higher standard than the preponderance standard used for most civil issues. Documentary proof, third-party witnesses, and medical or psychiatric records often carry the case.
- Address the collateral issues. Parentage, child support, parenting time, and in many states a property allocation must still be resolved.
- Obtain the decree. If the court is not satisfied, it may deny the annulment and, in several states, treat the case as a divorce petition instead — which is why alternative pleading is common.
Children, property, and support afterwards
The retroactive fiction stops at the nursery door. Every state has statutes protecting the status of children born during a marriage later annulled, and parentage established by the marital presumption or by an acknowledgment of paternity is not undone by the decree. Custody and parenting time are decided under the same best-interests standard used in any other case, and child support is calculated on the ordinary state guideline. The federal-state enforcement system administered through the Office of Child Support Services treats those obligations like any others. If parentage is genuinely disputed, that is a separate proceeding — see our guide to establishing and challenging paternity.
Property is messier. With no valid marriage, there is in principle no marital estate to divide under the rules described in our overview of community property and equitable distribution. States soften this in two ways. Many annulment statutes authorise the court to make an equitable allocation of property acquired during the purported marriage. And most recognise the putative spouse doctrine: a spouse who entered the marriage in good faith, genuinely believing it valid, may be granted the property and sometimes the support rights of a lawful spouse. Spousal support itself is the least predictable element — some states allow it after annulment, some only for a putative spouse, and some bar it entirely.
Civil annulment is not religious annulment
These are wholly separate systems. A religious tribunal applying its own canon or doctrine may declare a marriage null for reasons a civil court would never accept, and its decision has no effect on your marital status under state law. The reverse is equally true: a civil decree does not bind a religious body. Couples who need both must pursue both, and neither process shortens the other.
Frequently asked questions
Is annulment faster or cheaper than divorce?
Usually neither. A no-fault divorce requires no proof of wrongdoing, while an annulment requires proving a statutory defect, often by clear and convincing evidence. That means witnesses, documents, and frequently a contested hearing. Uncontested divorces routinely finish faster and for less money than contested annulments.
Does a short marriage qualify for annulment?
Not by itself. No state lists brevity as a ground. Short marriages sometimes coincide with real grounds — a hurried marriage entered while intoxicated, or one where a fraud surfaced immediately — but the ground does the work, not the calendar. Many states do offer streamlined divorce procedures for short, asset-free marriages.
Will an annulment erase the marriage from public records?
No. The marriage licence and certificate remain on file, and the annulment decree is added as a public court record. What changes is your legal status going forward, not the historical paper trail. Forms asking whether you have ever been married generally still require a truthful answer.
What if I file for annulment and lose?
Many states allow the court to grant a divorce instead where the pleadings support it, and experienced practitioners often plead both in the alternative. Losing the annulment claim does not trap anyone in the marriage; it simply means the exit is a divorce judgment rather than a decree of nullity.
Testing whether annulment fits your facts
Work backwards. Identify the defect that existed on the wedding day, check whether your state lists it as a ground, find the deadline attached to it, and ask honestly whether you have continued to live as spouses since learning of it. If any link in that chain breaks, annulment is probably not the route, and the practical question becomes which divorce track fits — a decision our guide to how divorce works in the United States and the wider family and divorce law hub address. Where a spouse deliberately concealed something material, gather the proof early; documents disappear and memories fade faster than the deadlines run. This article is general legal information, not advice; annulment grounds, standards of proof, and deadlines are set by state statute, and only a lawyer licensed in your state can evaluate a specific marriage.
