An injunction in Illinois is a court order that forces a person or business to do something or stop doing something, and Illinois courts issue them in three forms: a temporary restraining order for immediate short-term relief, a preliminary injunction to hold things in place during a lawsuit, and a permanent injunction entered as part of a final judgment. Each type has its own timing, standard, and appeal path, and each carries the same downside for anyone who ignores it: contempt, which can mean fines, jail, or both.
The Three Types and How Long They Last
A temporary restraining order (TRO) is the emergency tool. Under 735 ILCS 5/11-101, a judge can enter a TRO without notifying the other side if the petitioner shows through an affidavit or verified complaint that immediate and irreparable injury will occur before a hearing can be held. A TRO issued without notice expires no later than 10 days after signing, with one possible 10-day extension for good cause. The court must then set the preliminary injunction hearing at the earliest possible time; if the petitioner doesn’t pursue it, the TRO dissolves. The restrained party can move to dissolve or modify the TRO on two days’ notice.1Illinois General Assembly. Illinois Code 735 ILCS 5/11-101 – Temporary Restraining Order
A preliminary injunction comes next. It requires notice and an evidentiary hearing where both sides put on their case, and once granted it can remain in place for the full length of the lawsuit. Because that can mean months or years, courts examine these requests more carefully than TROs.
A permanent injunction is entered as part of the final judgment after trial or a dispositive ruling. It stays in force indefinitely unless a court later modifies or dissolves it, and courts issue one only when money damages wouldn’t adequately fix the harm.
What You Have to Prove
To get a preliminary injunction, the petitioner has to establish four things by a preponderance of the evidence:
- A protectable right — a legally recognized interest such as a property right, contract right, or statutory entitlement.
- Irreparable harm — harm money can’t adequately fix. Ordinary financial losses usually don’t count unless they threaten to destroy the business.
- No adequate remedy at law — a damages award after trial won’t make the petitioner whole.
- Likelihood of success on the merits — the underlying claims are strong enough to probably prevail at trial.
Even when all four are met, the judge weighs the balance of hardships between the parties. This is where many injunction requests quietly fail. A petitioner with a solid legal case can still lose if the order would shut down the other side’s livelihood over a comparatively small dispute.
Mandatory Injunctions Face a Higher Bar
Most injunctions are prohibitory: stop doing X. A mandatory injunction orders someone to take affirmative action, like tearing down an encroaching structure or restoring a diverted waterway. Illinois courts are more reluctant to issue these because they require ongoing supervision and impose heavier burdens on the restrained party. A mandatory preliminary injunction is granted only on the clearest equitable grounds, where the need is established beyond reasonable doubt.
How the Case Moves Through Court
The petitioner starts by filing a verified complaint and a motion for injunctive relief in circuit court. The complaint has to lay out the factual basis, supported by affidavits, exhibits, or sworn testimony. If the request is for a TRO without notice, the papers must specifically explain why waiting for a hearing would cause irreparable harm.
For a preliminary injunction, the respondent gets time to file a written response, and the court then holds an evidentiary hearing. Both sides argue, submit evidence, and may call witnesses. The petitioner carries the burden on all four factors, and courts require strict compliance with the procedural rules. Deficient motion papers can be denied before anyone reaches the merits.
If the court grants the injunction, the written order has to describe the acts being enjoined in reasonable detail and state the reasons for entry.1Illinois General Assembly. Illinois Code 735 ILCS 5/11-101 – Temporary Restraining Order Orders that are vague or overbroad are vulnerable on appeal, and they can’t support a contempt finding either, because a person can’t be punished for violating a command they couldn’t reasonably understand.
The Bond
Before entering a TRO or preliminary injunction, the court may require the petitioner to post a bond. If the injunction is later found to have been wrongfully granted, the bond covers costs and damages the restrained party suffered. The amount is whatever the court thinks appropriate.2Illinois General Assembly. Illinois Code 735 ILCS 5/11-103 – Bond
Two things to know. The bond is discretionary, not automatic — the statute says “may,” and some judges skip it in low-stakes cases. Government agencies are explicitly exempt from posting one.2Illinois General Assembly. Illinois Code 735 ILCS 5/11-103 – Bond If you’re the restrained party and the bond looks too small to cover what an improper injunction would cost you, that’s worth raising early, because an inadequate bond can leave you undercompensated even after you win.
Getting an Injunction Dissolved or Modified
Being subject to an injunction isn’t necessarily permanent. Under 735 ILCS 5/11-108, a motion to dissolve can be filed at any time, before or after an answer is filed. The court holds a hearing where both sides can present evidence and affidavits.
Typical grounds include changed circumstances that make the order unnecessary, new evidence undermining the original basis, or a weakening of the petitioner’s underlying claims. Courts have broad discretion, and the party seeking dissolution has to show why the order should no longer stand.
When a TRO or preliminary injunction is dissolved, the restrained party can move for a judgment awarding damages caused by the injunction. Under 735 ILCS 5/11-110, the court determines those damages before the case is fully resolved, and recovery can come through the pending action or in a separate action against the bond. If an injunction cost you money and shouldn’t have been granted, there is a path to get compensated.
What Happens If You Violate an Injunction
Ignoring an injunction is one of the riskier moves in Illinois litigation. The other side files a motion for contempt, and the consequences split in two depending on what the court is trying to accomplish.
Civil Contempt
Civil contempt is coercive. Sanctions continue until the contemnor complies with the order, and they can include ongoing fines, incarceration, and the other side’s attorney’s fees and costs. There is no fixed maximum, because the point isn’t punishment but compliance. Someone who refuses to obey can stay in jail indefinitely until they purge the contempt by doing what the order requires.
Criminal Contempt
Criminal contempt punishes past defiance and the sanctions are fixed at sentencing. Without a jury, the maximum is a $500 fine, six months in jail, or both. With a jury and a guilty finding, there is no statutory cap on the fine or the sentence. Because the stakes are higher, procedural protections are stronger: proof beyond a reasonable doubt, the right to counsel, and, where serious penalties are possible, the right to a jury trial.
Appealing an Injunction
Illinois provides two appeal routes depending on whether the order is final or interlocutory.
A permanent injunction is a final judgment, so the standard appeal rules apply. The notice of appeal must be filed with the circuit court clerk within 30 days after judgment is entered, or within 30 days of the ruling on a post-trial motion if one is filed.3Illinois Courts. Illinois Supreme Court Rule 303 – Appeals from Final Judgments of the Circuit Court in Civil Cases Miss it and the right to appeal can be lost. Pure legal questions are reviewed fresh; factual findings and equitable balancing are reviewed for abuse of discretion.
TROs and preliminary injunctions take effect before the case is over, so Illinois Supreme Court Rule 307 allows immediate appellate review as a matter of right, with no need for the appellate court’s permission. This covers orders granting, refusing, modifying, or dissolving an injunction.4Illinois Courts. Illinois Supreme Court Rule 307 – Interlocutory Appeals as of Right For TROs, review is by petition filed directly in the appellate court. The appellate court may stay enforcement during the appeal if the appellant can show a likelihood of success, and if the injunction is ultimately overturned, damages can be sought against the bond.2Illinois General Assembly. Illinois Code 735 ILCS 5/11-103 – Bond