Colorado recognizes two legal paths to end a marriage. One is divorce. The other is annulment, which Colorado law calls a declaration of invalidity. The two outcomes sound similar, but they are fundamentally different, and only a narrow set of circumstances qualifies a marriage for annulment. This page explains the grounds Colorado courts recognize, the deadlines that apply, and what you have to prove to obtain a declaration of invalidity.
How an Annulment Differs From a Divorce in Colorado
A divorce ends a legally valid marriage. An annulment establishes that the marriage was never valid to begin with. In the eyes of the law, the marriage is treated as though it never existed.
This distinction carries weight for different reasons. For some, it matters on religious grounds. Others want to undo a legal consequence of the marriage, whether a change in benefits or a shift in immigration status. And some prefer not to carry the label of divorce when they believe the marriage should never have been recognized.
The trade-off is that annulment is harder to obtain than divorce. A no-fault divorce requires only that you show the marriage is irretrievably broken. An annulment requires proof that the marriage was legally invalid from the start, based on specific grounds recognized by Colorado courts.
Legal Grounds That Qualify a Colorado Marriage for Annulment
Colorado courts recognize a limited set of grounds for a declaration of invalidity. Your marriage may qualify if one of the following applies.
Lack of capacity to consent
One spouse was unable to consent to the marriage because of a mental incapacity, legally, or because they were under the influence of alcohol or drugs at the time of the ceremony.
Inability to consummate
One spouse was physically unable to consummate the marriage, and the other did not know this at the time of marriage.
Underage marriage
One spouse was a minor who married without consent from a parent, a legal guardian, or a Colorado judge.
Fraud going to the essence of the marriage
One spouse entered the marriage on the basis of a deception central to the relationship. Concealing an illness, marrying solely to obtain a visa, or marrying for financial gain are common examples. General dishonesty does not meet this standard. The fraud has to go to the core reason the other spouse agreed to marry.
Duress
One or both spouses were forced, threatened, or coerced into the marriage, whether by the other spouse or by a third party.
Jest or dare
The marriage took place as a joke or a dare, and neither party intended to be married.
Bigamy
One spouse was already legally married to another person. Colorado law treats these marriages as void.
Incest
The spouses are related more closely than Colorado law permits. Marriages between certain blood relatives are void.
If none of these grounds fit your circumstances, divorce is the path available to you. An attorney can explain that option as well.
Colorado Annulment Filing Deadlines and How the Clock Works
Annulment is time-sensitive. If you miss the applicable deadline, you lose the right to file, even when valid grounds exist. The deadlines in Colorado work as follows.
- Six months from the date you discovered the issue, for lack of capacity, fraud, duress, or jest and dare.
- Twelve months from discovery, for inability to consummate.
- Two years from the date of marriage, for an underage marriage.
- No deadline applies to void marriages based on bigamy or incest, though such a petition is ordinarily filed before the death of a spouse or the settlement of an estate.
These deadlines are strict, and the discovery date is where most disputes arise. If you are close to a cutoff, speak with an attorney now rather than later.
Does Your Spouse Have to Agree to an Annulment in Colorado?
No. Only one spouse needs to file. You do not need your partner’s cooperation to petition the court for a declaration of invalidity. A contested annulment tends to be more complex than an uncontested one, and you will need evidence to support your claim either way.
Do You Have to Prove Your Grounds for Annulment?
Yes. The court will not grant an annulment simply because you assert that grounds exist. You have to prove them. Depending on the grounds, the necessary proof ranges from medical records and witness statements to communication history, immigration paperwork, or other documentation. An experienced family law attorney helps you identify the evidence you already have, the evidence you still need, and the most effective way to present it.
How Annulment Affects Children, Property, and Support
A declaration of invalidity does not erase the practical questions that come with ending a relationship. The court still addresses parenting time, decision-making authority, child support, and the division of property you acquired together. Colorado courts treat these matters seriously, even when the marriage itself is declared invalid. Annulment changes the legal status of the marriage. It does not make these issues disappear.
Frequently Asked Questions About Colorado Annulments
Is an annulment faster than a divorce?
Not necessarily. The legal process takes as long as a divorce, and sometimes longer, particularly when the other spouse contests the grounds. The appeal of annulment lies in the outcome, not the speed.
Does an annulment cost less than a divorce?
Sometimes, though not always. When grounds are disputed, an annulment costs more, because you are proving a legal case rather than ending a marriage that both parties accept is over.
Can you get an annulment after decades of marriage?
That depends entirely on the grounds. Bigamy and incest carry no time limit. Fraud, duress, and lack of capacity carry a six-month window from the date of discovery, which means a long marriage still qualifies when the issue came to light recently.
What does a declaration of invalidity mean?
It is the formal Colorado term for an annulment. The name differs, the legal result is the same. The marriage is treated as though it were never valid.
Is a religious annulment the same as a legal one?
No. A church or religious body grants a religious annulment and carries no legal effect. Only a Colorado court grants a legal declaration of invalidity.
Find Out Whether You Qualify for an Annulment in Colorado
If you are uncertain whether your marriage qualifies, a consultation is the most direct way to find out. CNL Law Firm reviews your circumstances, explains what Colorado law requires, and gives you a clear answer about your options.
The firm keeps caseloads small by design, so every client works directly with an experienced family law attorney who has the time to give the matter real attention.
Call (720) 370-2171 or use our contact form to schedule your free consultation. We serve clients throughout Douglas, Arapahoe, and Elbert Counties, as well as the wider Denver metro area.
