A civil divorce ends a marriage the law recognizes as valid. A civil annulment asks a court to declare that a valid marriage never existed in the first place. Both leave you legally single, but the legal theory behind each one changes how property is divided, whether spousal support is available, how you file taxes, and whether you can later claim benefits based on the relationship. That’s the heart of civil divorce vs. annulment, and it’s why most people who think they want an annulment actually need a divorce.
The Core Legal Difference
Divorce acknowledges that a real marriage happened and is now being terminated. The court divides what the couple built and sets terms for both parties going forward. Annulment is a legal fiction. The court treats the marriage as though it was never valid, which means the entire framework for dividing marital property and awarding ongoing support can collapse.
That distinction sounds academic until you’re the spouse who spent years in a marriage a court just declared never existed. The threshold to get an annulment is also much higher: you have to prove a specific defect existed at the moment the wedding happened, usually by clear and convincing evidence. A no-fault divorce, by contrast, requires no proof of wrongdoing at all. You just have to state that the marriage has broken down.
When You Can Get a Divorce
Every state now allows no-fault divorce. The typical language asks you to state that the marriage has broken down irretrievably or that irreconcilable differences exist. New York was the last state to adopt a no-fault option, in 2010, so this is a relatively recent nationwide reality. The overwhelming majority of divorces filed today are no-fault because the process is faster and avoids the expense of proving misconduct.
A handful of states still offer fault-based grounds alongside the no-fault option: adultery, abandonment for a specified period, cruel treatment that makes living together unsafe, and imprisonment. Fault-based filings are uncommon, but they occasionally matter in states where proving fault influences how the court divides assets or awards support. The evidentiary burden is higher, which drives up legal costs and extends the timeline.
The point for anyone comparing their options: if your question is whether you can get a divorce, the answer is almost always yes. You don’t need a reason the court will accept beyond the marriage not working.
When You Can Get an Annulment
Annulment grounds target a defect that existed at the time of the wedding, not problems that developed afterward. The court isn’t asking whether the marriage worked out; it’s asking whether a legally valid marriage ever formed. That’s a much narrower question. Annulment grounds split into two categories, and the difference between them matters.
Void Marriages
A void marriage was illegal from the start and can never be made valid. The two most common examples are bigamy, where one spouse was already married to someone else, and incest, where the spouses are close blood relatives. Technically, a void marriage doesn’t need a court order to be invalid because the law already treats it as though it never happened. In practice, most people still seek a formal annulment decree to clear the record and resolve any lingering property or custody questions. There is generally no deadline to challenge a void marriage.
Voidable Marriages
A voidable marriage is treated as valid unless and until someone challenges it in court. If nobody files, the marriage stands. Common grounds include fraud that goes to the heart of the relationship, such as concealing an inability to have children or misrepresenting the intent to live together. Others include one party being underage without required consent, mental incapacity or intoxication at the time of the ceremony, physical incapacity to consummate the marriage that was unknown to the other spouse, and consent obtained through force or threats.
The critical difference from void marriages: voidable marriages come with deadlines. If you wait too long, or continue living with your spouse after discovering the defect, you may lose the right to annul. Time limits range from as few as 90 days to several years depending on the ground and the state. Fraud-based claims typically run from the date you discovered the deception. Age-based claims usually expire within a few years of the underage spouse reaching 18. Miss the window and divorce becomes your only option, even if the original defect was real.
What Happens to Property and Support
This is where the practical difference hits hardest. In a divorce, courts divide marital property under either equitable distribution or community property rules, depending on the state. Retirement accounts, real estate, investments, and debts accumulated during the marriage are all on the table. Spousal support is available to the lower-earning spouse based on factors like the length of the marriage, each spouse’s earning capacity, and contributions to the household.
In an annulment, the legal premise is that no valid marriage ever existed, so there is technically no marital property to divide and no basis for spousal support. Each party generally walks away with whatever they brought into the relationship and whatever is titled in their name. For a marriage that lasted only weeks, this might not matter much. For one that lasted years, the result can be devastating to a spouse who sacrificed career advancement or accumulated no separate assets.
The putative spouse doctrine exists in many states to soften this outcome. If you entered the marriage in genuine good faith, believing it was valid, a court may treat you as a “putative spouse” and grant you some or all of the property and support rights you would have received in a divorce. Not every state recognizes the doctrine, and even where it exists, courts apply it inconsistently. If you’re facing an annulment after a long relationship, raise this question with an attorney before you file.
What Happens to Children
An annulment does not make children born during the marriage illegitimate. Every state treats children of an annulled marriage the same as children of a valid marriage for purposes of parentage, custody, and support. The parents were legally presumed to be married at the time of the child’s birth, and undoing the marriage after the fact doesn’t undo that presumption.
Child support obligations survive an annulment just as they survive a divorce. The court retains jurisdiction to order either parent to pay support based on income, custody arrangements, and the child’s needs. Custody and visitation are handled through the same framework used in divorce cases. If anything, an annulment with children involved is slightly more complicated because the court must resolve all those issues even though the underlying marriage has been declared invalid.
Taxes, Social Security, and Other Downstream Effects
Divorce and annulment produce very different results at tax time. After a divorce, your filing status changes going forward. You file as single, or as head of household if you have a qualifying dependent, starting in the tax year the divorce is finalized. Your previously filed joint returns remain valid.
An annulment is retroactive. Because the court has declared that no valid marriage ever existed, the IRS requires you to file amended returns for every prior tax year affected by the annulment that is still within the statute of limitations. You must change your filing status from married filing jointly to single or head of household on each amended return using Form 1040-X. The deadline is generally three years from the date you filed the original return, or two years from the date you paid the tax, whichever is later.1Internal Revenue Service. Publication 504 (2025), Divorced or Separated Individuals Amending multiple years of returns can trigger changes in tax liability, affect credits and deductions that were only available on joint returns, and create a balance owed to the IRS.
Social Security is the other downstream difference people miss. A divorced spouse who was married for at least 10 years can claim Social Security retirement benefits based on an ex-spouse’s earnings record, provided the divorced spouse is at least 62, currently unmarried, and not entitled to a higher benefit on their own record.2Social Security Administration. 5 Things Every Woman Should Know About Social Security An annulment eliminates this option entirely because, in the eyes of the law, the marriage never happened and no qualifying 10-year period existed.
The flip side can work in your favor. If you were receiving Social Security benefits that were reduced or terminated because of a marriage, an annulment may restore those benefits. The Social Security Administration treats an annulled marriage as though it never occurred, so benefits can be reinstated as of the month the annulment decree was issued.3Social Security Administration. Social Security Handbook 1853 – Reinstatement of Benefits When Marriage Terminates That matters for surviving spouse benefits, disabled adult child benefits, and other payments that end upon marriage.
Religious Annulment Is Not the Same Thing
Religious annulments and civil annulments are entirely separate processes with no legal connection. A religious annulment, most commonly associated with the Catholic Church, is a determination by religious authorities that a sacramental marriage was invalid under canon law. It has no effect on your legal marital status, property rights, tax filing, or any other civil matter. You cannot use a religious annulment to remarry under state law.
A civil annulment granted by a court has no bearing on your standing within a religious institution. In Catholic practice, a civil divorce or civil annulment is typically completed first, and the religious annulment process follows separately. The grounds for each are different, the decision-makers are different, and the consequences are different. If you need both, expect to go through two independent proceedings.
Which One Do You Actually Need?
Most people who think they want an annulment need a divorce. Simply regretting the marriage, discovering your spouse is difficult to live with, or wanting to erase the marriage from your history are not grounds. If you married in a legitimate ceremony, both parties were of legal age and sound mind, nobody committed fraud about something fundamental, and neither party was already married to someone else, you almost certainly don’t qualify for an annulment regardless of how short the marriage was.
The cases where annulment makes sense are narrow. You discover your spouse was already married. You were deceived about something that goes to the core of the marital relationship. The marriage was entered into under duress or without legal capacity to consent. In those situations, annulment may be worth pursuing despite the higher evidentiary burden because it carries the legal recognition that you were wronged at the outset. For everyone else, divorce is the faster, cheaper, and more straightforward path to being legally single.