The difference between an annulment and a divorce in New York comes down to what the court says about your marriage. A divorce ends a marriage that was legally valid and leaves you single going forward. An annulment declares that the marriage was never legally valid in the first place, so in the eyes of the law you were never married at all. Divorce is broadly available to anyone who meets the residency rules; annulment is only available if your marriage fits one of a short list of specific defects set out in New York’s Domestic Relations Law.
That difference sounds philosophical, but it has concrete consequences for your tax filings, your Social Security record, and whether you can even bring the case at all.
The Core Legal Difference
A divorce decree marks the date a valid marriage ended. Your records show you were married and are now divorced. An annulment judgment does something stronger: the court declares the marriage void from its beginning, and your legal status reverts as though no marriage ever took place. You are treated as never having been married, not as formerly married.
Both outcomes leave you free to remarry. Both can involve property division, support, and custody orders. The gap opens up in how outside systems, government agencies, insurers, and benefit programs, treat your marital history after the fact.
When You Can Get an Annulment
Annulments in New York fall into two categories: void marriages that were never legally valid, and voidable marriages that are valid until a court strikes them down. The distinction controls who can bring the case and when.
Void Marriages
A void marriage is invalid from day one whether or not anyone goes to court. New York recognizes two types: incestuous marriages between close relatives (ancestors and descendants, siblings) and bigamous marriages where one spouse was already legally married to someone else. Because these marriages have no legal force, either spouse or certain interested parties can seek a formal declaration of nullity at any time. No deadline applies.
Voidable Marriages
A voidable marriage looks valid on paper and stays that way until a court cancels it based on a specific defect. The grounds under Domestic Relations Law § 140 are:
- One or both spouses were under eighteen at the time of the marriage. New York raised the legal marriage age to eighteen with no exceptions.
- One spouse lacked the mental capacity to understand what marriage means at the time of the ceremony.
- One spouse was physically unable to consummate the marriage, provided the condition existed at the wedding and is incurable.
- A spouse has been continuously mentally ill for five or more years and the condition is incurable.
- One spouse was coerced into the marriage by force or duress.
- One spouse deceived the other about something so important that the deceived spouse would not have married had they known the truth.
Fraud is the most commonly litigated ground and the hardest to prove. The deception must go to something central to the marriage itself. Lying about wanting children or concealing a serious criminal history can qualify. Lying about income or career generally will not. One hard rule applies: if you kept living with your spouse as a married couple after you discovered the fraud, the court will deny the annulment.1New York State Senate. New York Code DOM 140 – Action for Marriage on Ground of Fraud
Deadlines That Can Bar Your Case
Several annulment grounds come with time limits that can permanently close the door:
- Age of consent: the underage spouse (or a parent or guardian) must file before the minor freely lives with the other spouse after turning eighteen. Once they cohabit as adults, the right to annul on this ground disappears.
- Physical incapacity: the action must be started within five years of the marriage date.
- Fraud: the statute of limitations from the Civil Practice Law and Rules applies, and the claim is barred entirely if the deceived spouse continued living with the other spouse after learning the full truth.
- Force or duress: there is no fixed statutory deadline, but waiting too long or voluntarily living together after the coercion ends will undermine the claim.
Mental illness and developmental disability claims have more flexible timing. A relative with legal interest can bring the case during the affected person’s lifetime, and the affected spouse can file after being restored to sound mind, as long as they haven’t freely resumed married life afterward.2New York State Senate. New York Code DOM 140 – Action to Annul a Marriage
When You Can Get a Divorce
Divorce has no filing deadline and no requirement that your marriage have any particular defect. New York allows both no-fault and fault-based divorce under Domestic Relations Law § 170. The no-fault option requires only that the relationship has broken down irretrievably for at least six months, with one spouse stating so under oath. No judgment will be granted on this ground, however, until all financial issues are resolved, including property distribution, spousal support, child support, and custody.3New York State Senate. New York Code DOM 170 – Action for Divorce
Fault-based grounds remain available and sometimes matter strategically in contested cases. They include cruel and inhuman treatment, abandonment for a year or more, imprisonment for three or more consecutive years after the marriage, adultery, and living apart for at least a year under a court-ordered separation or a signed, notarized separation agreement.3New York State Senate. New York Code DOM 170 – Action for Divorce
The practical takeaway: if your marriage is simply broken, divorce is your path. Annulment is not an alternative route to the same destination; it is a separate remedy for marriages that had a legal defect from the start.
What Stays the Same: Property, Support, and Children
One of the biggest misconceptions about annulment is that because the marriage “never existed,” the court cannot divide property or award support. That is wrong in New York. Domestic Relations Law § 236 Part B explicitly applies to annulment actions alongside divorce and separation cases. The court will distribute marital property equitably, can award post-divorce maintenance, and will order child support as needed.4New York State Senate. New York Code DOM 236 – Special Controlling Provisions
Children born during an annulled marriage are not affected by the judgment. Domestic Relations Law § 24 states that a child born to parents who entered into a marriage is the legitimate child of both parents, even if that marriage is later annulled or declared void. Custody, visitation, and child support proceed the same way they would in a divorce.5New York Public Law. New York Code DOM 24 – Effect of Marriage on Legitimacy
What Changes: Taxes and Social Security
This is where the “marriage never existed” legal fiction hits hardest, and it is often the deciding factor for people who could technically qualify for annulment but have been married for several years.
If your marriage is annulled, the IRS requires you to file amended returns for every tax year affected by the annulment that is still open under the statute of limitations, generally three years from the original filing date or two years from the date you paid the tax, whichever is later. On each amended return, your filing status changes from married to single, or to head of household if you qualify.6Internal Revenue Service. Filing Taxes After Divorce or Separation Divorce does not trigger this retroactive obligation. Once divorced, you simply file as single or head of household going forward.
Social Security benefits present another gap. A divorced spouse can collect benefits based on an ex-spouse’s work record if the marriage lasted at least ten years.7Social Security Administration. If You Had a Prior Marriage Because an annulment erases the marriage from a legal standpoint, those years may not count toward the ten-year threshold. If you are close to that mark, this is a factor worth raising with an attorney before you choose a path.
Residency Rules Apply Either Way
Both actions require the filing spouse to establish a connection to New York. Domestic Relations Law § 230 sets out five scenarios, and you need to fit at least one:
- You married in New York and either spouse has lived here continuously for at least one year before filing.
- You lived together as spouses in New York and either spouse has been a resident for at least one continuous year.
- The grounds for the action arose in New York and either spouse has been a resident for at least one year.
- The grounds arose in New York and both spouses live here when the case is filed.
- Either spouse has been a New York resident for at least two continuous years before filing, regardless of where the marriage took place or the grounds arose.
The fourth scenario is the only one with no waiting period, but it requires that both parties currently reside in the state and that the cause of action occurred here.8New York State Senate. New York Code DOM 230 – Required Residence of Parties
Which One Should You Pursue?
For most people the question answers itself. If your marriage was legally valid when it started and has since broken down, divorce, usually the no-fault version, is the available remedy. Annulment is only on the table if your marriage falls into one of the void or voidable categories above, and even then, deadlines and continued cohabitation may have closed the door.
If you qualify for both (for example, a marriage induced by fraud that you want out of promptly), weigh the practical consequences rather than the symbolic ones. Annulment carries the retroactive tax filing obligation and may cost you Social Security credit for the years of marriage. It also tends to cost more in attorney fees than an uncontested no-fault divorce because you have to prove the specific defect with evidence, often including witness testimony. The appeal of having the marriage declared void from the start is real for some people, but it comes with a bill attached.