Chicago / Illinois Workers Compensation Process
How does Illinois workers compensation work?
Illinois law requires most employers to carry workers compensation insurance. Key features:
- Covers medical expenses for work-related injuries/illnesses
- Provides wage replacement benefits during recovery
- No-fault system (employee does not need to prove employer negligence)
- Exclusive remedy (generally cannot sue employer for workplace injuries)
- Managed by Illinois Workers' Compensation Commission (IWCC)
When must I report my workplace injury?
| Who | Deadline | Action |
|---|---|---|
| Employee | 45 days | Notify employer of injury (820 ILCS 305/6(c)); may be oral or written |
| Employee (to file claim) | 3 years from injury OR 2 years from last payment | File Application for Adjustment of Claim with IWCC (820 ILCS 305/6(d)) |
| Employer | Between 15th and 25th of each month | File First Report of Injury with IWCC for injuries resulting in loss of more than 3 scheduled work days (per 820 ILCS 305/6(b)) |
Important: You must notify your employer within 45 days of the injury or when you reasonably discover the work-related condition (notice can be oral or written). To preserve your legal claim, file an Application for Adjustment of Claim with the Illinois Workers' Compensation Commission within 3 years from the date of injury or 2 years from the last payment of compensation, whichever is later.
How do I get medical treatment?
Under 820 ILCS 305/8(a):
- Employee chooses up to two doctors: You select your initial treating physician and may select a second physician if you wish to change; all treatment by these doctors and their referrals is covered
- Referrals fully covered: Any physician, specialist, or medical provider to whom your two chosen doctors refer you is covered at employer expense
- Emergency care anywhere: First aid and emergency treatment do not count toward your two doctor choices
- After two choices exhausted: If you wish to change doctors beyond your two selections, employer selects and pays for all subsequent treatment (unless employer agrees to your choice or IWCC approves change)
- Preferred Provider Programs: Some employers maintain IWCC-approved panels; choosing outside the panel counts as one of your two choices
All reasonable and necessary medical expenses related to your work injury are covered with no co-pays or deductibles.
What should my return-to-work note contain?
Illinois return-to-work documentation should include:
- Physician's name, credentials, and signature
- Date of examination
- Work status: full duty, light duty with restrictions, or off work
- Specific physical restrictions (weight limits, positioning, etc.)
- Duration of restrictions or date of next evaluation
- Diagnosis code (ICD-10) if required by insurer
What benefits can I receive for my injury?
Illinois workers compensation provides four main types of benefits depending on injury severity and work capacity:
| Benefit Type | When Applicable | Typical Rate |
|---|---|---|
| Temporary Total Disability (TTD) | Unable to work at all during recovery | 66⅔% of average weekly wage (subject to state maximum) |
| Temporary Partial Disability (TPD) | Working light duty at reduced wages | 66⅔% of difference between pre-injury and light-duty wages |
| Permanent Partial Disability (PPD) | Permanent impairment after reaching MMI | Based on impairment rating × weekly rate (calculated differently for specific vs. non-specific body parts) |
| Permanent Total Disability (PTD) | Permanently unable to work in any capacity | Lifetime benefits at TTD rate |
How are temporary disability benefits calculated?
Illinois calculates your average weekly wage (AWW) by examining your earnings in the 52 weeks before the injury. For temporary total disability, you receive 66⅔% of your AWW, subject to the state maximum weekly benefit (which changes annually based on state average weekly wage).
Example: If your AWW is $900, you would receive $600/week in TTD benefits (66⅔% × $900 = $600). As of July 15, 2026, the state maximum TTD rate is $2,045.63/week; higher earners are capped at this maximum.
What is permanent partial disability?
After you reach maximum medical improvement (MMI), your physician assigns a permanent impairment rating if you have lasting limitations. Illinois PPD is paid at 60% of your average weekly wage (lower than the 66⅔% TTD rate) per 820 ILCS 305/8(b)(2.1). Illinois uses different calculation methods depending on the body part:
- Scheduled members (specific body parts): Arms, legs, hands, feet, fingers, toes, eyes, hearing—each has a statutory number of weeks assigned. Example: complete loss of a hand is 205 weeks; 20% permanent impairment = 41 weeks (20% × 205) of compensation at your PPD rate (60% AWW).
- Non-scheduled injuries (general body): Back, neck, internal organs, head injuries, multiple body parts—rated as percentage of "person as a whole." A 20% whole-person impairment might result in 100 weeks of compensation at 60% AWW (formula varies based on impairment level and wage).
- Amputations get higher rate: Actual amputations, enucleations, and certain specific losses use the higher TTD maximum cap instead of the lower PPD cap.
Example PPD calculation: If your AWW is $1,000 and you have a 15% permanent impairment to your back (non-scheduled), you'd receive 60% × $1,000 = $600/week for 75 weeks (15% × 500 weeks maximum for body-as-a-whole), totaling $45,000 in PPD benefits.
Illinois PPD calculations are complex and often generate the largest disputes in workers compensation cases. Consult an attorney to evaluate whether an impairment rating is accurate and whether the calculation is correct.
Who pays my medical bills?
All reasonable and necessary medical expenses related to your workplace injury should be paid by the workers compensation insurer at no cost to you—no co-pays, no deductibles. This includes:
- Doctor visits and specialist consultations
- Diagnostic testing (X-rays, MRIs, CT scans)
- Surgery and hospitalization
- Physical therapy and rehabilitation
- Prescription medications
- Durable medical equipment (crutches, braces, wheelchairs)
- Mileage reimbursement for medical appointments (current IRS rate)
If you paid out-of-pocket for authorized medical treatment, you can seek reimbursement from the insurer. If treatment is disputed, the insurer may seek utilization review or require an independent medical examination (IME) before authorizing further care.
What happens if I can only do light duty?
When physician releases worker to light duty:
- Employer should offer light-duty work within restrictions if available
- Employee should accept reasonable light-duty offers
- Refusing suitable light duty may affect benefit eligibility
- Light duty must be within medical restrictions
- Wage differential may entitle worker to TPD benefits
When have I reached maximum medical improvement?
MMI is reached when:
- Condition has stabilized and further improvement is unlikely
- Physician determines permanent restrictions, if any
- Permanent impairment rating may be assigned
- Transition from temporary to permanent benefits
Should I hire a workers compensation attorney?
Consider legal representation if:
- Claim is denied by employer or insurance carrier
- Benefits are delayed or terminated
- Employer disputes injury occurred at work
- Permanent disability or disfigurement results
- Medical treatment is denied or insufficient
- You're pressured to return before medical clearance
- Settlement offer seems inadequate
Verify attorney licenses at iardc.org (Illinois Attorney Registration and Disciplinary Commission). Most workers comp attorneys work on contingency.
What does the Illinois Workers' Compensation Commission do?
The IWCC provides:
- Arbitration hearings for disputed claims
- Forms and resources on their website
- Chicago and Springfield office locations
- Free ombudsman services for unrepresented workers
Are there specific considerations for Chicago workers?
Workers in Chicago should be aware:
- IWCC has offices in downtown Chicago
- Many specialized workers comp attorneys practice in Chicago
- Union workers may have additional protections through collective bargaining
- Cook County has numerous authorized medical providers
Where can I find official forms and more information?
- Illinois Workers' Compensation Commission: iwcc.il.gov (official forms and resources)
- Illinois ARDC Attorney Search: iardc.org (verify attorney licenses)
- Chicago Workers' Compensation Lawyers Association: Professional organization
- Legal Aid Organizations: May provide free assistance if you qualify