A trial court decides what happened. An appellate court decides whether the law was applied correctly to what happened. That one distinction explains the rest: why appeals have no witnesses, no jury, and no new evidence, and why winning an appeal rarely means walking out with a check.
In Illinois these are levels of one system. Cases begin in the circuit court, appeals go to the Appellate Court, and a few reach the Illinois Supreme Court.
What an Illinois Trial Court Does
Illinois circuit courts are the trial courts, and the state constitution gives them original jurisdiction over all justiciable matters. There are 25 judicial circuits, each sitting inside one of five appellate districts. An injury lawsuit filed in Illinois starts here.
This is where the factual record gets built. Both sides present evidence and cross-examine witnesses, the judge rules on what comes in and instructs the jury, and the jury (or the judge in a bench trial) decides whose account to believe. Medical records, accident reports, and text messages as evidence are all tested here. Most cases never reach trial, resolving in negotiation or personal injury mediation first, which is part of why how long a car accident case takes varies so much.
What an Illinois Appellate Court Does
The Appellate Court reviews what the circuit court did. It does not retry the case, hear new evidence, or listen to witnesses, and there is no jury. Its judges work from the record on appeal, the parties’ briefs, and, where the court decides it would help, oral argument.
The court has five districts and 54 judgeships, and appeals are heard by panels of three judges. The Illinois Constitution requires each division to have at least three judges and a majority to concur before a decision issues. Appealing a final circuit court judgment is a matter of right; getting the Illinois Supreme Court to take the case afterward is not, since review there is generally discretionary.
Trial Court vs. Appellate Court at a Glance
| Circuit court (trial) | Appellate Court | |
|---|---|---|
| Main question | What happened, and who is liable | Whether the law was applied correctly |
| Who decides | One judge, with a jury in most civil trials | A panel of three judges, majority controls |
| Evidence | Testimony, exhibits, expert opinion | The existing record only, no new evidence |
| Possible outcome | Verdict, judgment, damages award | Affirm, reverse, modify, or remand |
| Reach | Binds the parties in that case | Published opinions guide later cases |
Illinois Appeal Deadlines
Appeal deadlines are short and unforgiving. Miss the first one and the appellate court cannot hear the case at all.
- 30 days to file the notice of appeal with the circuit court clerk after entry of a final order
- 30 days from the last post-judgment motion, since under Rule 303(a)(3) the clock can instead run from the order disposing of that motion
- 2 days for a temporary restraining order and 14 days for certain pre-judgment orders on the custody or care of children
- 63 days for the circuit court to send up the record, then 35 days for the appellant’s brief
- 21 days to ask the Appellate Court to rehear the case after its written decision
- 35 days to petition the Illinois Supreme Court for leave to appeal
Weekends and holidays count, though a deadline landing on one moves to the next business day. Rule 303(d) allows a late notice of appeal on a showing of reasonable excuse, but only within 30 days after the original deadline passed. The circuit court’s judgment also stays in effect during an appeal unless you obtain a stay.
Why This Matters Before You Reach Court
Appellate courts work from the record, and the record is made at trial. Objections never raised are usually gone by the time anyone considers an appeal, which is why trial lawyers build a record with review in mind. Front-end deadlines matter as much. Most Illinois injury suits must be filed within two years of the injury (735 ILCS 5/13-202), and the Illinois statute of limitations is strict. Claims against a city, park district, or other local public entity generally carry a shorter one-year deadline (745 ILCS 10/8-101). As for your own share of the blame, Illinois bars recovery only when a plaintiff is more than 50% at fault; at 50% or less, damages are reduced in proportion (735 ILCS 5/2-1116).
Frequently Asked Questions
What is the difference between a trial court and an appellate court?
A trial court hears evidence and decides the facts, then applies the law to reach a verdict or judgment. An appellate court reviews that proceeding for legal error. It takes no new evidence, hears no witnesses, and uses no jury.
How long do I have to appeal in Illinois?
Generally 30 days from entry of the final order, filed with the circuit court clerk. If a post-judgment motion was filed, the 30 days can instead run from the order disposing of the last one. Some matters are far shorter, including two days for a temporary restraining order.
Does an appellate court hear new evidence?
No. Illinois appellate judges review the record on appeal, the briefs, and sometimes oral argument. Evidence never introduced at trial cannot be added later, which is why what happens in the circuit court is so hard to undo.
How many judges decide an appeal in Illinois?
Three. The Illinois Appellate Court sits in five districts with 54 judgeships, and appeals are assigned to panels of three judges. The state constitution requires a majority of the panel to concur before a decision is issued.
Can I appeal just because I lost?
Losing alone is not a basis for appeal. You need a legal error that could have affected the outcome, such as improperly admitted evidence, a wrong jury instruction, or a misapplied statute. Even then, a panel may find the error harmless and affirm anyway.
What happens if the appellate court reverses the trial court?
The panel may reverse the judgment outright, modify it, or remand the case to the circuit court for a new trial or further proceedings. A reversal is not the same as a payout, and a remand frequently means parts of the case are litigated again.
If you are working out where your case stands or what a deadline means for you, talk it through with someone in Illinois courts every week. Contact 844-SEE-MIKE for a free, no-pressure consultation, or read how we help Chicago personal injury clients.
This article is general information about Illinois court procedure, not legal advice about your case.
