The Illinois IWCC Application for Adjustment of Claim is the official document an injured worker files with the Illinois Workers’ Compensation Commission to start a formal claim for benefits under the Illinois Workers’ Compensation Act. The form (IC1, revised 1/2024) tells the Commission and your employer that you are demanding benefits for a work-related injury, occupational disease, or death, and missing the filing deadline under Section 6(d) permanently bars your right to recover.
According to the IWCC’s most recent Annual Report, more than 40,000 new Applications for Adjustment of Claim are filed each year in Illinois, and a meaningful share are dismissed for technical errors like a wrong respondent name, a missing proof of service, or a wage figure that does not match payroll records. This guide walks you through every box, page, and signature line so your claim survives those traps.
Here is what you will learn in this article:
- 📝 How to fill out every field on Form IC1 line by line, in plain English
- 📅 The exact deadlines under 820 ILCS 305/6(d) and what happens if you miss them
- 📬 Every filing channel (mail, in person at five IWCC offices, and limited e-filing) with addresses, fees, and proof-of-filing tips
- ⚖️ Three full named-person scenarios showing exactly what to write
- 🚫 The ten most common mistakes that get claims dismissed and how to dodge each one
What the Form Is and Who Must File It
Form IC1, the Application for Adjustment of Claim, is the charging document that opens a workers’ compensation case before the Illinois Workers’ Compensation Commission. The Commission is the state agency that decides disputes about medical bills, temporary total disability (TTD), permanent partial disability (PPD), permanent total disability (PTD), wage differential, vocational rehabilitation, and death benefits. Without a filed Application, the Commission has no jurisdiction over your claim, even if your employer has been paying benefits voluntarily.
Any worker injured on the job in Illinois may file the form, including full-time, part-time, seasonal, and most undocumented workers. A surviving spouse, child, or other dependent files the same form when the injury caused death, checking the death-claim boxes near the top. An attorney files on behalf of a client by signing the petitioner’s attorney block, and a parent or guardian files for a minor.
Employers do not file Form IC1. Employers respond to a filed Application by entering an appearance through their insurance carrier or third-party administrator. The form is only for the injured worker (the petitioner), the dependents of a deceased worker, or counsel representing them.
The current revision of the form is dated 1/2024 in the lower-left corner. Always confirm you have that version before filing because the IWCC rejects superseded versions during intake screening at busy offices like Chicago.
Before You Start: Documents and Information You Need
Gather everything below before you open the PDF. Filling the form with missing information leads to wrong answers, and wrong answers lead to motions to dismiss under 50 Ill. Adm. Code 9020.70.
- Your full legal name and current mailing address. The Commission mails every notice to the address on the Application, so an outdated address means missed hearings.
- Your Social Security number. The IWCC uses it to index your file and cross-check wage records; a wrong SSN delays case assignment for weeks.
- Your date of birth. Benefits like the death-benefit minimums and the 25-year PTD cap depend on age.
- The exact legal name of your employer (the respondent). Not the trade name, not the parking-lot sign — the legal entity, found on your W-2 or pay stub.
- The employer’s address and the address of the location where you were injured. These can differ, and both belong on the form.
- The date of accident or the date of manifestation for repetitive-trauma and occupational-disease claims. Pick the wrong date and you may miss the statute of limitations.
- A short, accurate description of how the injury happened. One or two sentences in plain language is enough at this stage.
- The body parts affected. Use ordinary words like low back, right shoulder, or both wrists.
- Your average weekly wage (AWW) for the 52 weeks before the injury. This drives every dollar of TTD, PPD, and PTD under Section 10.
- The name of the employer’s workers’ compensation insurance carrier, if you know it. Look on the IWCC Insurance Compliance search if your employer will not tell you.
- Proof you served a copy on the respondent. A certificate of service or certified mail green card is required by Commission rule.
If a single item on this list is missing, stop and find it before drafting the form. Filing with placeholder data and “fixing it later” is the fastest path to a dismissed claim.
Where to Get the Form and How to Access It
The official PDF lives on the Commission’s forms page under the title IC1 — Application for Adjustment of Claim. Download it directly rather than using a third-party copy, because outdated PDFs from blogs and law-firm sites often lack the 1/2024 revision footer that intake clerks check. The file is fillable in Adobe Acrobat Reader, which is free.
You can also pick up paper copies at any of the five IWCC offices: Chicago (100 W. Randolph St., Suite 8-200), Springfield (4500 S. Sixth Street Frontage Road East), Peoria (401 Main Street, Suite 600), Collinsville (1803 Ramada Boulevard), and Rockford (200 S. Wyman Street). Mailing addresses match the office addresses, and front-desk staff will hand you a clean copy if you ask. The IWCC Handbook on Workers’ Compensation explains the form’s purpose in lay terms and is worth reading first.
For most filers, the right path is download, print, type or hand-print the answers, sign in ink, make at least three copies (one for the IWCC, one for the respondent, one for your records), and file by mail or in person. The Commission has been piloting limited electronic filing, but as of the 1/2024 revision, paper remains the primary channel for an opening Application.
If you cannot print, the IWCC’s customer-assistance line at 866-352-3033 will mail you a blank form. Plan for three to five business days for mail delivery.
Step-by-Step: How to Fill Out Form IC1 Line by Line
The form is one page front and back, but every box matters. Each H3 below covers a single field or block in the order it appears on the form.
Case Number Box (Top Right)
What it asks in plain English. The top-right corner has a “Case No.” line for the IWCC’s internal docket number.
How to answer it. Leave this blank. The Commission’s filing clerk stamps the case number on after you file.
Example. Maria Lopez leaves the Case No. line empty when she submits her form at the Chicago office.
Nuance. If you are filing an amended Application for an existing case, write the original case number here in the format 24WC012345.
Common mistake and consequence. Filers sometimes write a guessed number or a hospital account number, and intake staff have to white it out, delaying the file stamp.
Misconception. People believe they must obtain a case number from the Commission first. They do not — filing the form creates the case number.
Petitioner’s Name
What it asks in plain English. This is the injured worker’s full legal name.
How to answer it. Print last name, first name, then middle initial, exactly as it appears on your Social Security card. Use all caps if you are hand-printing for legibility.
Example. Maria Elena Lopez writes LOPEZ, MARIA E.
Nuance. If you have changed your name since the injury (marriage, divorce, court order), use your current legal name and attach a short cover letter noting the prior name.
Common mistake and consequence. Using a nickname like “Mary” instead of “Maria” creates SSA mismatches that hold up benefit checks once the case settles.
Misconception. Many filers think the form needs the name they “go by” at work. The Commission needs the legal name on file with the Social Security Administration.
Petitioner’s Address
What it asks in plain English. Your current mailing address where the IWCC will send all notices.
How to answer it. Write street, apartment number, city, state, and ZIP. A P.O. Box is fine if that is where you actually receive mail.
Example. Maria writes 4421 N. Sheridan Rd., Apt. 3B, Chicago, IL 60640.
Nuance. If you move during the case, you must file a Notice of Change of Address within seven days under Commission rule.
Common mistake and consequence. Listing a relative’s address “for now” leads to missed Notices of Hearing and dismissals for want of prosecution.
Misconception. People assume the IWCC will track them down through their employer if they move. It will not.
Petitioner’s Phone Number and Email
What it asks in plain English. Daytime phone and email where the Commission and the respondent can reach you.
How to answer it. Provide a number you actually answer. Email is optional but speeds settlement contracts.
Example. Maria enters 773-555-0142 and mlopez@email.com.
Nuance. If you have a court-ordered no-contact situation, you can list your attorney’s contact information instead and note “c/o counsel.”
Common mistake and consequence. Listing a disconnected number forces opposing counsel to file motions just to reach you, which arbitrators dislike.
Misconception. Filers sometimes think providing a phone number waives privacy. It does not — the number is for case communication only.
Respondent’s Legal Name
What it asks in plain English. The exact legal name of your employer.
How to answer it. Copy the name from your W-2 box (c) or your most recent pay stub. Include “Inc.,” “LLC,” or “Corp.” if shown.
Example. Maria’s W-2 says “Lakeside Logistics, LLC,” so she writes LAKESIDE LOGISTICS, LLC.
Nuance. If you worked for a staffing agency placed at a host employer, list both as separate respondents on attached pages, because both can be liable under the loaned-employee doctrine.
Common mistake and consequence. Naming the trade name (e.g., “Lakeside Trucking”) instead of the legal entity is the single most common reason claims need to be amended, costing weeks of delay.
Misconception. Filers think suing the wrong name “doesn’t matter because everyone knows who I mean.” The Commission disagrees, and so does the insurance carrier’s defense counsel.
Respondent’s Address
What it asks in plain English. Where to mail the Application to the employer.
How to answer it. Use the address listed on the Illinois Secretary of State’s business entity search for the registered agent, not the warehouse address.
Example. Maria enters c/o CT Corporation System, 208 S. LaSalle St., Suite 814, Chicago, IL 60604.
Nuance. Sole proprietors do not have registered agents. For them, use the owner’s home or principal business address.
Common mistake and consequence. Mailing to the job-site address instead of the registered agent leads to claims that service was improper, which can stall the case for months.
Misconception. People think the IWCC serves the respondent. It does not — petitioners must serve respondents and prove it.
Date of Accident
What it asks in plain English. The date the injury happened.
How to answer it. Write it in MM/DD/YYYY format.
Example. Maria enters 03/14/2025 because that is the day she slipped on ice in the loading dock.
Nuance. For repetitive-trauma claims, use the date of manifestation — the day a doctor first connected the condition to work — not the day symptoms started. For occupational-disease claims under the Occupational Diseases Act, use the date of disablement.
Common mistake and consequence. Putting the date of surgery or the date you stopped working starts the clock at the wrong point and may make the claim look untimely.
Misconception. Filers think any date in the right ballpark works. Arbitrators routinely dismiss claims when payroll and medical records contradict the listed date.
Place of Accident
What it asks in plain English. The physical location where you were hurt.
How to answer it. Give the street address and a short descriptor like “loading dock 4” or “third-floor stockroom.”
Example. Maria writes 1500 S. Western Ave., Chicago, IL 60608 — loading dock 4.
Nuance. If the injury happened on the road (truck driver, home health aide), write the city and a brief description like “I-294 southbound near Hinsdale Oasis.”
Common mistake and consequence. Vague answers like “the warehouse” force you to amend the form when the respondent operates multiple locations.
Misconception. Filers worry that the Place of Accident must match the employer’s headquarters. It does not.
How Did the Accident Occur (Description)
What it asks in plain English. A short narrative of what happened.
How to answer it. One to three plain sentences. State the act, the body part, and the immediate result.
Example. Maria writes: “While loading a pallet, I slipped on ice and fell onto my left side. I felt immediate pain in my low back and left shoulder.”
Nuance. For repetitive trauma, describe the work activity over time, not a single incident: “Repeated lifting and reaching for ten years caused gradual onset of bilateral wrist pain.”
Common mistake and consequence. Writing a long story with blame (“my supervisor never salted the dock”) opens the door to discovery disputes you do not need at the pleading stage.
Misconception. People think this section is where they argue the case. It is not — keep it neutral and short.
Parts of Body Affected
What it asks in plain English. Which body parts the injury affected.
How to answer it. List in plain words: low back, left shoulder, left hip.
Example. Maria writes LOW BACK, LEFT SHOULDER.
Nuance. Add “and body as a whole” if you have systemic symptoms like radiating nerve pain or psychological injury, because PPD for spinal injuries is paid as a percentage of the person as a whole under Section 8(d)(2).
Common mistake and consequence. Listing only the most painful part and leaving out a secondary injury (the left shoulder, for example) can bar later medical bills for that part under the doctrine of res judicata.
Misconception. Filers think they can add body parts at trial. Some arbitrators allow amendments freely, but others do not, so list everything now.
Nature of Injury
What it asks in plain English. The medical category — fracture, sprain/strain, herniated disc, repetitive trauma, occupational disease.
How to answer it. Use the most specific term a doctor has used in your records.
Example. Maria writes LUMBAR DISC HERNIATION; LEFT SHOULDER ROTATOR CUFF TEAR.
Nuance. If a final diagnosis is pending, write “to be determined per ongoing treatment” and update at trial.
Common mistake and consequence. Self-diagnosing (“I think it’s a slipped disc”) when the medical record says “lumbar strain” creates impeachment material for defense counsel.
Misconception. People think this field locks them into a diagnosis. It does not, but it does set the carrier’s reserves and shapes settlement offers.
Average Weekly Wage (AWW)
What it asks in plain English. Your average gross weekly pay over the 52 weeks before the injury.
How to answer it. Add up all gross wages, overtime, and bonuses from the 52 weeks, divide by the number of weeks actually worked, and write the result.
Example. Maria earned $48,360 in the 52 weeks before March 14, 2025, and writes AWW = $930.00.
Nuance. Under Section 10, if you worked fewer than 52 weeks, divide by weeks actually worked. Overtime is included only if it was mandatory or regular.
Common mistake and consequence. Listing take-home pay instead of gross under-counts your AWW and shrinks every benefit check by roughly 25 percent.
Misconception. Filers think the carrier will calculate AWW for them. The carrier will, but it will calculate low, and the figure on the Application anchors negotiations.
Compensation Rate
What it asks in plain English. The TTD rate, which is two-thirds of AWW, subject to statutory caps.
How to answer it. Multiply AWW by 0.6667. Compare to the current state minimum and maximum rates and use whichever applies.
Example. Maria’s AWW of $930 yields a TTD rate of $620.00 per week.
Nuance. If you are married or have children, use the augmented dependency table for higher caps.
Common mistake and consequence. Forgetting dependents costs filers real money when they are at the maximum cap.
Misconception. People think the rate is automatic. It is — but only if you put accurate AWW and dependency data on the form.
Marital Status and Number of Children Under 18
What it asks in plain English. Whether you are married and how many children depend on you.
How to answer it. Check married/single/divorced/widowed and write the count of children under 18 (or under 25 if a full-time student, or any age if disabled).
Example. Maria checks MARRIED and writes 2.
Nuance. Stepchildren count if you support them. A child en ventre sa mère (in utero) at the time of a fatal accident counts for death benefits.
Common mistake and consequence. Under-reporting dependents lowers death-benefit minimums and TTD caps.
Misconception. Filers think only biological children count. The statute is broader.
Wages Paid After Injury / Date Last Worked
What it asks in plain English. Whether the employer kept paying and when you last worked.
How to answer it. Enter the last day you actually worked in MM/DD/YYYY and check whether wages continued.
Example. Maria enters 03/14/2025 and checks NO wages paid after injury.
Nuance. If you returned to light duty at reduced pay, write the date you started light duty and the new wage rate.
Common mistake and consequence. Listing the date your doctor wrote a note instead of the actual last day worked creates a TTD calculation gap.
Misconception. People think this field is about leave time. It is about wage continuation.
Compensation Paid (TTD/Medical)
What it asks in plain English. Whether the employer or carrier has paid TTD checks or medical bills.
How to answer it. Check yes or no and list dollar amounts paid to date if known.
Example. Maria checks YES, $4,960 in TTD and approximately $18,300 in medical paid to date.
Nuance. If you do not know the medical total, write “approximate, subject to verification” — that is acceptable.
Common mistake and consequence. Saying “no” when the carrier has paid creates a credibility problem and lets defense counsel impeach you at trial.
Misconception. Filers think paid benefits mean they cannot file. They can — voluntary payments do not waive the right to file.
Insurance Carrier and Policy Number
What it asks in plain English. The employer’s workers’ comp insurance company.
How to answer it. List the carrier’s name. Add the policy number if you know it.
Example. Maria writes TRAVELERS INDEMNITY CO., policy unknown.
Nuance. If the employer is self-insured, write SELF-INSURED. If the employer has no coverage, file a separate claim with the Injured Workers’ Benefit Fund.
Common mistake and consequence. Leaving this blank when the insurance compliance search would have shown the carrier looks careless to arbitrators.
Misconception. People think they need the policy number. They do not — the carrier name is enough.
Petitioner’s Signature and Date
What it asks in plain English. Your sworn signature confirming the contents are true to the best of your knowledge.
How to answer it. Sign in ink and date in MM/DD/YYYY. Electronic signatures are accepted only when filed through the IWCC’s e-filing pilot.
Example. Maria signs “Maria E. Lopez” and dates 04/02/2025.
Nuance. A signature by a guardian or estate representative requires attached letters of office or power of attorney.
Common mistake and consequence. An unsigned form is treated as no filing — and the statute of limitations keeps running.
Misconception. Filers think a typed name counts. On a paper Application, it does not.
Attorney Information Block
What it asks in plain English. If a lawyer represents you, the lawyer’s name, firm, address, ARDC number, phone, and email.
How to answer it. The attorney completes this block and signs separately.
Example. Maria’s attorney enters JANE PARK, ARDC 6312987, Park & Park LLC, 200 W. Madison St., Chicago, IL 60606.
Nuance. Pro se filers leave this block empty.
Common mistake and consequence. Listing an attorney who has not yet been retained creates an unauthorized appearance, which the ARDC takes seriously.
Misconception. Filers think hiring an attorney later requires re-filing. It does not — the attorney files a separate appearance.
Proof of Service
What it asks in plain English. A statement that you mailed or hand-delivered a copy of the Application to the respondent.
How to answer it. Complete the certificate-of-service block at the bottom: who you served, where, when, and how.
Example. Maria writes that she served Lakeside Logistics, LLC c/o CT Corporation by certified mail, return receipt requested, on 04/02/2025.
Nuance. Email service is allowed only by agreement. Default to certified mail.
Common mistake and consequence. Skipping the certificate of service is a top reason cases are dismissed at the first status call.
Misconception. People assume the IWCC serves respondents. It does not — service is on you.
Three Filled-Out Examples Using Real Scenarios
Scenario 1: Maria Lopez — Warehouse Slip and Fall
| Form Section | What Maria Enters |
|---|---|
| Petitioner’s Name | LOPEZ, MARIA E. |
| Petitioner’s Address | 4421 N. Sheridan Rd., Apt. 3B, Chicago, IL 60640 |
| Respondent’s Legal Name | LAKESIDE LOGISTICS, LLC |
| Respondent’s Address | c/o CT Corporation System, 208 S. LaSalle St., Suite 814, Chicago, IL 60604 |
| Date of Accident | 03/14/2025 |
| Place of Accident | 1500 S. Western Ave., Chicago, IL — loading dock 4 |
| Description | Slipped on ice while loading a pallet; fell onto left side |
| Parts of Body | LOW BACK, LEFT SHOULDER |
| AWW / TTD Rate | $930.00 / $620.00 |
| Insurance Carrier | TRAVELERS INDEMNITY CO. |
| Signature / Date | Maria E. Lopez / 04/02/2025 |
Scenario 2: David Chen — Repetitive-Trauma Carpal Tunnel
| Form Section | What David Enters |
|---|---|
| Petitioner’s Name | CHEN, DAVID K. |
| Petitioner’s Address | 712 Maple Ave., Naperville, IL 60540 |
| Respondent’s Legal Name | PRECISION ASSEMBLY CORP. |
| Respondent’s Address | c/o Illinois Corporation Service Co., 801 Adlai Stevenson Dr., Springfield, IL 62703 |
| Date of Accident (Manifestation) | 11/08/2025 |
| Place of Accident | 2800 Diehl Rd., Naperville, IL — assembly line 2 |
| Description | Repeated gripping and torquing over 12 years caused gradual onset of bilateral wrist pain |
| Parts of Body | BOTH WRISTS, BOTH HANDS |
| AWW / TTD Rate | $1,140.00 / $760.00 |
| Insurance Carrier | LIBERTY MUTUAL INSURANCE |
| Signature / Date | David K. Chen / 12/15/2025 |
Scenario 3: Janet Williams — Surviving Spouse Death Claim
| Form Section | What Janet Enters |
|---|---|
| Petitioner’s Name | WILLIAMS, JANET R. (surviving spouse of Robert Williams, deceased) |
| Petitioner’s Address | 318 W. Elm St., Rockford, IL 61101 |
| Respondent’s Legal Name | NORTHERN STEEL FABRICATORS, INC. |
| Respondent’s Address | 1900 Harrison Ave., Rockford, IL 61104 |
| Date of Accident | 09/22/2025 |
| Place of Accident | 1900 Harrison Ave., Rockford, IL — bay 3 crane area |
| Description | Decedent struck by falling steel beam during overhead crane operation; pronounced dead at scene |
| Nature of Injury | FATAL CRUSH INJURY |
| Dependents | Surviving spouse + 1 child age 14 |
| Insurance Carrier | ZURICH AMERICAN INSURANCE CO. |
| Signature / Date | Janet R. Williams / 10/30/2025 |
How to File the Completed Form
You may file Form IC1 by mail, in person at any of the five IWCC offices, or, in limited cases, through the IWCC e-filing portal. Filing is free — there is no fee for opening a workers’ comp case in Illinois, which is one of the few good pieces of news in this process.
By mail, send the original and one copy to the IWCC Chicago office at 100 W. Randolph St., Suite 8-200, Chicago, IL 60601 (the central docketing office for all five regions). Use certified mail, return receipt requested, and keep the green card as your proof of filing. Allow seven to ten business days for the file-stamped copy to come back to you. In person, walk into any IWCC office during business hours (8:30 a.m. to 5:00 p.m., Monday through Friday), present three copies, and the intake clerk will stamp two and keep the original. Bring a photo ID, although it is not technically required.
For e-filing under the current pilot, follow the instructions on the e-filing page, upload the completed PDF, and save the confirmation email — that email is your proof of filing. E-filing is currently limited to represented parties in selected case types, so most pro se filers should default to mail or in-person filing.
Whichever channel you pick, separately serve the respondent by certified mail and complete the certificate of service block on the form. Without proof of service, the Commission cannot move your case to a status call.
What Happens After You File
Within roughly 30 days, the Commission mails you a Notice of Case Assignment showing your case number (formatted 25WC######), your assigned arbitrator, and your home venue. You will appear at a status call about every three months until trial or settlement, and the arbitrator’s docket controls scheduling.
The respondent files an Appearance and Answer through its insurance carrier or defense counsel, usually within 30 to 60 days. Discovery — medical records, depositions, vocational evaluations — proceeds informally, and motions are heard at status calls. Most cases resolve by Settlement Contract on Form IC4, but contested cases proceed to arbitration on Form IC2 (Request for Hearing) or Form IC2A (Petition for Immediate Hearing under Section 19(b) for urgent medical or TTD disputes).
If you settle, the arbitrator reviews the contract for fairness and issues an order. If you try the case, the arbitrator issues a written Decision within 60 days of the close of proofs. Either side may appeal to a three-commissioner panel, then to the Circuit Court, then to the Appellate Court Workers’ Compensation Division, then by petition for leave to the Illinois Supreme Court.
Mistakes to Avoid When Filling Out the Form
- Naming the wrong respondent. Suing “Lakeside Trucking” instead of “Lakeside Logistics, LLC” can force you to amend and serve again, costing months.
- Using the wrong date of accident. Listing surgery date or first-symptom date instead of the legal accident or manifestation date can make the claim look time-barred under Section 6(d).
- Forgetting body parts. Leaving off a secondary injury can bar later treatment for that part.
- Listing net wages instead of gross. This shrinks every benefit check by roughly 25 percent.
- Ignoring dependents. Under-reporting children means lower TTD caps and lower death-benefit minimums.
- Skipping the certificate of service. No service equals dismissal at the first status call.
- Mailing service to the job site. Service must go to the registered agent or owner, not the warehouse.
- Forgetting to sign in ink. Unsigned forms are treated as no filing.
- Using a superseded form version. Anything older than the 1/2024 revision is rejected at intake.
- Filing without keeping copies. If the IWCC loses your form, you have no proof of timely filing.
- Putting an attorney’s name without authorization. That is an unauthorized appearance and can trigger ARDC review.
Do’s and Don’ts
Do’s
- Do download the form fresh from the official IWCC site every time, because revisions update silently.
- Do verify the respondent’s legal name through the Secretary of State business search before printing.
- Do calculate AWW from gross wages over the full 52 weeks, including overtime and bonuses where required.
- Do serve the respondent by certified mail, return receipt requested, and staple the green card to your file copy.
- Do file within three years of the accident or two years from the last payment of compensation, whichever is later, under Section 6(d).
- Do keep at least three copies — one for the IWCC, one for the respondent, and one for your records.
Don’ts
- Don’t guess the respondent’s address; use the registered agent on file.
- Don’t write a long story in the description box — keep it neutral and brief.
- Don’t leave the AWW or compensation rate fields blank, even if the carrier has not yet calculated them.
- Don’t sign electronically on a paper filing; the IWCC requires ink.
- Don’t list a P.O. Box for the respondent unless that is the registered agent’s address.
- Don’t wait until the last week before the statute of limitations runs — mail delays kill claims.
Pros and Cons of Filing on Your Own vs. With an Attorney
Pros of Pro Se Filing
- No attorney fee (though Illinois caps fees at 20 percent of the recovery under Section 16a, so the savings are modest).
- Full control over communications and decisions.
- Direct access to your file at the IWCC.
- Faster initial filing if you are organized.
- Useful for clear, low-value cases with cooperative employers.
Cons of Pro Se Filing
- You must learn the Commission Rules and the Workers’ Compensation Act on the fly.
- Defense counsel is experienced and represents the carrier’s interests, not yours.
- Mistakes on AWW, body parts, and respondent name can cost more than an attorney’s 20 percent fee.
- Settlements without counsel are routinely lower than with counsel, even after fees.
- Pro se filers often miss third-party claims (against negligent non-employers) entirely.
FAQs
Is there a fee to file the Application for Adjustment of Claim?
No. Illinois charges no filing fee to open a workers’ compensation case, and the IWCC bars charging injured workers for the form itself.
How long do I have to file?
No later than three years from the date of accident, or two years from the last payment of compensation, whichever is later, under Section 6(d).
Do I file at my local IWCC office?
No. All Applications are docketed centrally in Chicago, but you may hand-file at any of the five IWCC offices and venue is set later.
Do I need an attorney to file?
No. Pro se filing is allowed, although attorney fees are capped at 20 percent and most filers benefit from counsel.
Do I write my employer’s trade name or legal name in the Respondent box?
No. Use the legal entity name from your W-2 or the Secretary of State search, not the trade name.
Should I list every body part hurt or just the main one?
No, do not list only the main one. List every part affected to preserve your right to benefits for each.
Do I need to know the insurance policy number?
No. The carrier name is enough; the policy number can be added later.
Is a typed signature okay on a paper Application?
No. Paper filings require an ink signature. Electronic signatures are accepted only through the e-filing pilot.
Do I serve the employer myself?
Yes. Petitioners must serve respondents, usually by certified mail, and complete the certificate of service.
Can I amend the form after filing?
Yes. The Commission allows amendments under 50 Ill. Adm. Code 9020, but motions to amend at trial are sometimes denied.
Does filing waive my right to sue a third party?
No. Workers’ comp is your exclusive remedy against your employer, but third-party claims against non-employers remain available.
Do undocumented workers have the right to file?
Yes. Illinois courts have repeatedly held that immigration status does not bar workers’ compensation benefits.
What if my employer has no insurance?
Yes, you still have a remedy — file a claim against the Injured Workers’ Benefit Fund and pursue the employer personally.
Do I include medical records with the Application?
No. The Application is a pleading, not evidence. Records are exchanged later in discovery.
Related reading
- How to Fill Out California WCAB Application for Adjudication of Claim + FAQs
- How to Fill Out California WCAB DWC-AD 1 (w/Examples) + FAQs
- How to Fill Out Illinois IWCC Form 45 (w/Examples) + FAQs
- How to Fill Out Illinois IWCC Form IC1 (w/Examples) + FAQs
- How to Fill Out Illinois IWCC Petition to Reinstate (w/Examples) + FAQs
- How to Fill Out Illinois IWCC Subpoena (Workers’ Comp Illinois) (w/Examples) + FAQs