Many people use “annulment” and “divorce” as if they mean the same thing. They do not.
A divorce ends a valid marriage. An annulment, legally referred to as a decree of nullity, declares that a purported marriage was legally invalid from the beginning. The difference matters because the legal pathway available to you depends on the circumstances of the marriage.
If you are questioning whether your marriage was ever legally valid, this guide explains what an annulment actually is, how it differs from divorce, the narrow grounds that apply in Australia, and how the application process works.
Key Takeaways: Annulment vs Divorce in Australia
- Divorce ends a marriage that was legally valid.
- An annulment or decree of nullity is a finding that there was no valid legal marriage, even though a marriage ceremony may have taken place.
- An annulment is only available where the marriage was void under Australian law.
- A short marriage, non-consummation, never living together, family violence or general incompatibility is not, by itself, a ground for annulment.
- Unlike divorce, an annulment does not require the parties to have been separated for 12 months.
- A void marriage can still have legal consequences for property, financial and parenting matters.
What Is an Annulment and What Legal Effect Does It Have?
An annulment is a court declaration that a marriage is invalid, made through what is legally called a decree of nullity. It is a finding that there was no legal marriage between the parties, even though a marriage ceremony may have taken place. This is different from a divorce, which formally ends a marriage that was legally valid.
The legal effect is significant. Once a decree of nullity is granted, you are not treated as a divorced person because the purported marriage was found to be void.
In Australia, applications for a decree of nullity are made to the Federal Circuit and Family Court of Australia under the Family Law Act 1975 (Cth). The Court will only grant a decree of nullity where it is satisfied that the marriage was void on a recognised legal ground.
How Is an Annulment Different from a Divorce in Australia?
The core difference is what each order says about your marriage. A divorce recognises that you were validly married and legally ends that marriage. An annulment declares that the purported marriage was never legally valid to begin with.
Here is how the two compare in practice:
| Feature | Divorce | Annulment |
|---|---|---|
| What it does | Ends a valid marriage | Declares that the purported marriage was legally invalid |
| Separation period | At least 12 months’ separation is generally required before applying | No 12-month separation requirement |
| Fault | No-fault; there is no need to prove wrongdoing | A specific legal defect must be established |
| Marital status after | Divorced | The marriage is treated as void |
| How common | Common | Rare |
In short, divorce is about legally ending a valid marriage. Annulment is about establishing that a purported marriage was never legally valid in the first place.
If your marriage was valid but has broken down, separation and divorce may be the appropriate pathway.
What Are the Legal Grounds for Seeking an Annulment?
An annulment is granted only where the marriage was legally invalid from the outset. General unhappiness, a short marriage, or a change of heart are not grounds for annulment in Australia.
Under Australian law, a marriage may be declared void where:
- Bigamy: one party was already legally married to someone else at the time of the marriage.
- Prohibited relationship: the parties are within a prohibited relationship, such as being direct ancestors, descendants or siblings.
- No real consent: consent was not real because it was obtained by duress or fraud, one party was mistaken about the identity of the person they were marrying or the nature of the ceremony, or one party was mentally incapable of understanding the nature and effect of the marriage ceremony.
- Not of marriageable age: a party was not legally permitted to marry at the time of the ceremony and the necessary requirements for an under-age marriage were not satisfied.
- Invalid marriage under the law governing the ceremony: the marriage did not comply with the legal requirements applicable to the marriage ceremony.
These grounds are narrow and technical. Evidence is therefore important. If you believe your marriage may be void, obtaining legal advice early can help you understand whether the available evidence supports an application for a decree of nullity.
What Makes a Marriage Void Rather Than Valid Under Australian Law?
In Australia, an application for a decree of nullity must be based on the ground that the marriage is void. The relevant question is not simply whether the relationship broke down or whether the marriage was unsuccessful.
The Family Law Act 1975 (Cth) provides the framework for applications for decrees of nullity, while the Marriage Act 1961 (Cth) sets out circumstances in which marriages are void.
This is worth understanding because people sometimes assume they can annul a marriage simply because it broke down quickly or was never consummated. Non-consummation on its own is not a ground for annulment in Australia.
The Federal Circuit and Family Court of Australia also confirms that never having lived together, family violence and general incompatibility are not grounds for declaring a marriage invalid.
The question the Court asks is narrow: was there a legal defect that made the marriage invalid? If the answer is no, divorce is generally the appropriate pathway if the marriage has broken down.
How Do You Apply for an Annulment in Australia?
An application for an annulment is legally an application for a decree of nullity. It is a court process rather than an administrative process.
Generally, the applicant must:
- Identify the legal ground for nullity and the facts relied upon to establish that the marriage was void.
- File an Initiating Application (Family Law) seeking a decree of nullity.
- Prepare and file a supporting affidavit setting out the facts relied upon, including relevant information about the marriage ceremony.
- Provide a copy of the marriage certificate, unless it is already on the Court file.
- Serve the application on the respondent in accordance with the applicable court requirements.
- Attend the Court process and provide any further evidence or information required to determine whether the marriage was void.
The exact requirements can depend on the circumstances of the application. The Federal Circuit and Family Court of Australia provides current information about applying for a decree of nullity.
Do You Have to Be Separated for 12 Months to Get an Annulment?
No. The 12-month separation requirement applies to divorce, not annulment.
To obtain a divorce in Australia, the Court must be satisfied that the marriage has broken down irretrievably and that the parties have been separated for at least 12 months. An annulment is different because the application is based on the argument that the marriage was void rather than on the breakdown of a valid marriage.
There is therefore no 12-month separation requirement for an application for a decree of nullity. However, you still need to establish a recognised legal ground and provide sufficient evidence to support the application.
What Happens to Property and Children Following an Annulment?
An annulment does not mean that you automatically lose rights relating to property, finances, maintenance or parenting. Australian family law can continue to apply to a void marriage for these purposes.
The Federal Circuit and Family Court of Australia confirms that it can make financial and property orders in relation to a marriage, including a void marriage. There can also be time limits for making financial or property applications after a decree of nullity, so obtaining advice promptly can be important.
Here is what that can mean in practice:
- Property and finances: the Court can make financial or property orders arising from a void marriage, subject to the requirements of the Family Law Act 1975.
- Spousal maintenance: a party to a void marriage may still be able to seek spousal maintenance where the legal requirements are satisfied.
- Children: the validity of the parents’ marriage does not determine the child’s entitlement to appropriate parenting arrangements or other legal protections.
- Parenting arrangements: parenting matters are determined according to the applicable family law principles, including the best interests of the child.
Financial and property applications arising from a marriage that has been declared a nullity generally need to be commenced within 12 months of the decree of nullity, unless the Court grants leave to proceed out of time or another applicable exception applies.
So while an annulment changes the legal status of the marriage itself, it does not remove your ability to address the practical financial and parenting issues arising from the relationship. If this applies to you, our team can help you work through property division in separation and any parenting matters.
Is a Religious Annulment the Same as a Legal Annulment?
No. A religious annulment and a legal annulment are entirely separate.
A religious annulment is granted by a church or religious authority and affects your standing within that faith. It has no effect on your legal marital status under Australian law.
This is a common point of confusion. You can obtain a religious annulment and still be legally married in the eyes of Australian law. You can also be legally divorced and still be considered married by your religion.
If you need your marital status changed legally, whether for remarriage, property or other reasons, you must go through the appropriate legal process. A religious annulment does not replace a court order for a decree of nullity, and a legal decree of nullity does not determine your religious status.
Need Advice About an Annulment?
An annulment is only available in limited circumstances, and the distinction between a void marriage and a valid marriage that has broken down is legally important.
If you are unsure whether you may be eligible for an annulment, contact Leda Lawyers today to discuss your circumstances. Our experienced family lawyers can explain your options and help you determine whether an annulment or divorce is the right pathway for you.
Frequently Asked Questions About Annulment in Australia
How long does an annulment take in Australia?
There is no fixed timeframe for an annulment in Australia. The time required can depend on the circumstances of the case, the evidence available and whether the application is contested.
Unlike divorce, there is no 12-month separation period that must pass before an application for a decree of nullity can be made. However, you still need to prepare the application and supporting evidence and comply with the Court’s procedural requirements.
Can I get an annulment if my marriage was very short?
Not on the basis of length alone. A short marriage is not a ground for annulment in Australia.
You must show that the marriage was legally void, such as because of bigamy, a prohibited relationship, lack of real consent, a failure to comply with applicable legal requirements, or a party not being of marriageable age in circumstances where the marriage was void.
If none of those grounds apply, divorce is generally the correct process if the marriage has broken down. You will generally need to have been separated for at least 12 months before applying for divorce.
Do I need to be separated for 12 months to apply for an annulment?
No. The 12-month separation requirement applies to divorce, not annulment.
Because an annulment application is based on the marriage being void, rather than on the breakdown of a valid marriage, there is no 12-month separation requirement. However, you must have a recognised legal ground and evidence capable of supporting an application for a decree of nullity.
Is an annulment cheaper or easier than a divorce?
Not necessarily. While an annulment does not require a 12-month separation period, it can be more difficult to obtain because you must establish a specific legal basis for saying that the marriage was void.
Divorce is a no-fault process and does not require you to prove that either spouse was responsible for the breakdown of the marriage. For most people whose marriage was legally valid, divorce is the more appropriate pathway.
Can I still claim property or maintenance after an annulment?
Yes. Even where a marriage is declared void, Australian family law can allow the Court to make financial, property and maintenance orders arising from the void marriage, provided the relevant legal requirements are met.
There are important time limits that can apply. For example, financial or property proceedings arising from a void marriage generally need to be commenced within 12 months of the decree of nullity unless the Court grants leave or another applicable exception applies.
An annulment changes the legal status of the marriage, but it does not necessarily prevent you from resolving financial or parenting matters arising from the relationship.