Definition
An injunction is an equitable court order that requires a party to do a specific act or to refrain from doing something. Unlike a money judgment, an injunction directs conduct. Courts grant injunctions only when monetary damages would be inadequate—typically when a party would otherwise suffer irreparable harm that cannot be undone or compensated after the fact.
Legal Meaning
An injunction is a classic form of equitable relief, a category of remedies developed to address situations where simply paying money cannot make the injured party whole. Because it is equitable, an injunction is considered an "extraordinary remedy" that courts do not grant lightly. The party seeking it bears the burden of justifying the court's intervention.
Injunctions can be prohibitory, ordering a party to stop a particular activity (such as halting construction on disputed land), or mandatory, ordering a party to take affirmative action (such as removing an encroaching structure). They are used across many areas of law, including contract disputes, intellectual property, employment, property, and constitutional litigation.
The defining feature of injunctive relief is the irreparable harm requirement: the moving party must show that, without the order, it will suffer an injury that money damages cannot adequately repair. Examples include the destruction of a one-of-a-kind property, ongoing disclosure of confidential trade secrets, or environmental damage that cannot be reversed. Injunctions are frequently sought alongside other remedies; understanding how courts decide these motions illustrates broader concepts of civil litigation, such as summary judgment and the court's jurisdiction.
Key Points
- An injunction orders a party to do something or to stop doing something
- It is equitable relief, used when money damages would be inadequate
- The moving party usually must show irreparable harm that money cannot fix
- There are three main types: temporary restraining orders, preliminary injunctions, and permanent injunctions
- Courts weigh likelihood of success, irreparable harm, the balance of hardships, and the public interest
- Injunctions can be prohibitory (stop an act) or mandatory (require an act)
- Courts may require the moving party to post a bond to protect the other side
- Violating an injunction can result in contempt of court, including fines or jail
Real-World Example
A technology company learns that a former engineer has taken its confidential source code and is about to share it with a competitor. Money damages later would be hard to calculate and could not undo the disclosure once the secret is out—classic irreparable harm.
The company asks the court for a temporary restraining order to immediately bar the former employee from disclosing the code, then for a preliminary injunction to keep that prohibition in place while the lawsuit proceeds. If the company ultimately wins on the merits, the court may issue a permanent injunction as part of the final judgment, permanently forbidding use or disclosure of the trade secret. At each stage the court weighs the likelihood of success, the harm to each side, and the public interest.
Types of Injunctions Compared
| Type | Timing & Duration | Key Features |
|---|---|---|
| Temporary Restraining Order (TRO) | Emergency, very short term (often days) | Can sometimes issue with limited or no notice; preserves the status quo |
| Preliminary Injunction | Lasts during the lawsuit | Requires notice and a hearing; uses the multi-factor test |
| Permanent Injunction | Part of the final judgment; can be indefinite | Granted after the case is decided on the merits |
| Prohibitory Injunction | Any stage | Orders a party to stop a specific activity |
| Mandatory Injunction | Any stage | Orders a party to take affirmative action; scrutinized more closely |
The Four-Factor Test
Before issuing a preliminary injunction, courts generally weigh four factors, though the precise wording differs between federal and state courts:
- Likelihood of success on the merits: Is the moving party likely to win the underlying case?
- Irreparable harm: Will the moving party suffer harm that money cannot remedy if the injunction is denied?
- Balance of hardships: Does the harm to the moving party outweigh the harm an injunction would impose on the opposing party?
- Public interest: Would granting the injunction serve, or disserve, the public?
Courts also frequently require the party requesting an injunction to post a bond or other security, so that the enjoined party can be compensated if it turns out the injunction was wrongly granted. State courts may apply these factors with different emphasis, and some use a "sliding scale" in which a stronger showing on one factor can offset a weaker showing on another.
Injunctions and Money Damages
An injunction and an award of damages are not mutually exclusive. A party may seek both: an injunction to stop ongoing or future harm and damages to compensate for harm already suffered. But because equitable relief is reserved for situations where legal remedies fall short, a court will deny an injunction if money alone would adequately make the party whole. This is why framing the irreparable-harm argument is so central to any request for injunctive relief. If you are dealing with a dispute that may call for an injunction, our guide on how to choose a lawyer can help you find counsel with the right litigation experience.
Related Terms
Need Emergency Court Relief?
An experienced litigator can move quickly to protect your rights with an injunction
Find a Lawyer Near YouWhen You Need a Lawyer
Seeking or opposing an injunction is time-sensitive and procedurally demanding. A litigation attorney can:
- Assess whether your situation qualifies for injunctive relief
- Build the irreparable-harm and likelihood-of-success arguments
- Prepare the motion, supporting declarations, and any required bond
- Move quickly to obtain a TRO in a genuine emergency
- Oppose an injunction sought against you and protect your interests at the hearing
- Advise you on compliance to avoid contempt if an order is entered
Because injunctions often arise on short timelines and carry serious consequences, prompt legal advice is essential.
Frequently Asked Questions
What is an injunction?
An injunction is a court order that requires a person or organization to either do a specific act or stop doing something. It is a form of equitable relief, meaning it is used when an award of money damages would not adequately protect the party seeking it. Courts grant injunctions sparingly, typically only when the moving party shows it would otherwise suffer irreparable harm that money cannot fix.
What is the difference between a TRO, a preliminary injunction, and a permanent injunction?
A temporary restraining order (TRO) is short-term emergency relief that can sometimes be issued very quickly, occasionally without full notice to the other side, to preserve the status quo. A preliminary injunction lasts during the lawsuit and is issued only after notice and a hearing. A permanent injunction is granted as part of the final judgment after the case is decided on the merits and can last indefinitely.
What is the irreparable harm requirement?
Irreparable harm means an injury that cannot be adequately remedied by money damages after the fact. Because injunctions are equitable remedies, a party generally must show that without the order it will suffer harm that is real, imminent, and not compensable through a later award of damages. Examples include the destruction of unique property, ongoing disclosure of trade secrets, or environmental damage that cannot be undone.
What factors do courts consider before granting an injunction?
For a preliminary injunction, courts typically weigh four factors: whether the moving party is likely to succeed on the merits, whether it will suffer irreparable harm without the injunction, whether the balance of hardships favors the moving party, and whether the injunction serves the public interest. The exact formulation varies between federal and state courts, but these core considerations are widely applied.
What happens if someone violates an injunction?
Violating an injunction can lead to a finding of contempt of court. Depending on the circumstances, a court may impose fines, order compliance, award the harmed party's losses, or in serious cases impose jail time until the violator complies. Because an injunction is a direct court order, disobeying it is treated as a defiance of the court's authority and carries real consequences.