Illinois Workers’ Compensation Rules for Employers
Illinois requires workers’ compensation from the first employee. Who may opt out, where to buy a policy, poster duties, filing deadlines and penalties.
Illinois Workers’ Compensation
Coverage from the first employee, who may opt out, what the workplace notice has to say, and the clocks that start after an injury
The Illinois question I hear most often is not whether workers’ compensation is required. It is whether it is required at this size. Three employees, one of them part-time, nobody doing anything dangerous, and a founder who assumes a threshold sits somewhere above them.
There is no threshold. The Commission answers it in a single sentence on its own insurance page: if you have one employee, even a part-time employee, you must obtain coverage. Illinois then makes the real decision somewhere else, in a list of enterprises the Act calls extra hazardous and in a short set of elections that let owners take themselves out of their own policy.
This page covers one state. How the system works in general, what the exclusive remedy bargain buys you and how a premium is built all live in our guide to workers’ compensation insurance. Hiring, wages, leave and the rest of the Illinois picture belong to the Illinois HR compliance guide.
Who Has to Carry Coverage
Every Illinois employer with at least one employee must carry workers’ compensation, and the duty starts on the first day that person works. The Commission states on its insurance page that there is no waiting period, because employees are covered by the Act from the moment they are hired.
The route the statute takes to that result is worth understanding, because it explains the exceptions. Section 3 of the Act applies automatically to employers engaged in a long list of enterprises it declares extra hazardous. Construction, excavating and electrical work sit at the top of that list. So do warehousing, mining, food service where knives or hot grease are in play, and public beauty shops.
Two entries at the bottom of the list do the heavy lifting for ordinary businesses. Section 3(15) covers any enterprise using electric, gasoline or other power driven equipment. Section 3(17)(a) covers any business selling goods or rendering services to the public at large where the annual payroll in the year before the injury exceeded $1,000. Between them, a normal retailer, restaurant, clinic or office lands inside the Act without anyone electing anything.
Coverage follows Illinois work rather than an Illinois address. The Act reaches people whose employment results in injury inside the state, whose work is principally localized here, or whose contract of hire was made here. An out-of-state company doing any work in Illinois needs a policy that lists Illinois on its coverage, even where every worker lives elsewhere.
| Situation | Illinois rule | Citation |
|---|---|---|
| You hire an uninsured subcontractor for construction or structural work | The principal contractor is liable to pay compensation to that subcontractor’s employees, with a right to recover the amount from the subcontractor afterwards | 820 ILCS 305/1(a)3 |
| The accident happens away from the site you contracted for | The contractor liability rule does not apply where the accident occurs elsewhere than on or about the immediate premises the principal contracted to have the work done | 820 ILCS 305/1(a)3 |
| You loan an employee to another employer | If the borrowing employer does not pay, the loaning employer must, and liability is joint and several, with reimbursement running back to the borrowing employer | 820 ILCS 305/1(a)4 |
| An out-of-state company sends workers into Illinois | The company must provide a policy that includes Illinois coverage for those workers, even where all of them reside in the same state as the company, per the Commission. Only a policy naming Illinois is valid here | IWCC insurance page; 820 ILCS 305/1(b)2 |
| You use an employee leasing company | The leasing company must report to the Commission each client company named on the policy, the schedule identifying client name, FEIN and job location, and each certificate of insurance issued | 820 ILCS 305/4(a-2) |
| Your policy is cancelled or not renewed | Coverage does not terminate until at least 10 days after the Commission receives notice, unless replacement coverage takes effect sooner | 820 ILCS 305/4(b) |
| You are a building or construction employer working across the state | Premium payments must be based on the rates of the situs where the project is located in Illinois, with penalties up to $1,000 per day of work and $50,000 per project | 820 ILCS 305/4(a-1) |
The subcontractor row is the one that turns a clean company into a claim file. If you engage trades and one of them carries nothing, that crew’s injured worker becomes your compensation liability, and your recovery against the subcontractor is only as good as the subcontractor. A current certificate from every trade on site is not paperwork hygiene, it is the thing standing between you and someone else’s injury.
Who Sits Outside the Requirement
Illinois exclusions are mostly elective and mostly personal to owners. Rather than exempting job types, the Act lets specific individuals withdraw themselves, and it sets a small number of true carve-outs for agriculture, private households and commission-only real estate work. Everything else stays inside.
The list below is the working version for a small business. The statutory text sits in Sections 1(b)3, 3(17) through 3(20) of the Workers’ Compensation Act, and the Commission summarizes the same ground in its employer FAQ.
| Worker or setting | How Illinois treats it |
|---|---|
| Sole proprietor | May elect to be covered under Section 1(b)3, or may elect not to provide compensation for injuries to himself or herself under Section 3(20) |
| Business partner | Same election as a sole proprietor. The choice covers the individual partner, not the partnership’s employees |
| Corporate officer | A bona fide President, Vice President, Secretary or Treasurer employed by the corporation may withdraw as an individual by written notice to the insurance carrier, effective on receipt |
| Member of a limited liability company | May elect not to provide compensation for injuries to himself or herself under Section 3(20) |
| Family members on the payroll | Covered like anyone else, unless they are bona fide corporate officers or the business meets the agricultural exception |
| Agricultural and aquacultural enterprises | Outside the Act where the operation employs less than 400 working days of labor per quarter during the preceding calendar year, excluding hours worked by the employer’s spouse and immediate family living with them |
| Domestic workers in a private home | A household becomes a covered employer only where domestic workers are employed a total of 40 or more hours per week for 13 or more weeks during a calendar year |
| Real estate broker, broker-salesman or salesman | Not an employee under the Act when paid by commission only |
| Work outside your usual trade or business | Not automatically covered. An employer may elect to provide compensation to such a person by complying with Sections 2 and 4 |
| Independent contractors | Outside the Act where genuine. In construction the Employee Classification Act presumes employment, and the Commission points to Roberson for the rule that a written lease calling a trucker a contractor does not end the duty to insure |
| Employees of an excluded owner | Covered. An owner election is personal and never reaches the workforce |
| Railroad employees under federal law | Outside the Act where the federal statute governing employer liability is exclusive |
One limit matters more than any other. The Department of Insurance states that the owner elections do not apply to employers in extra hazardous occupations, and it names construction, trucking and businesses operating at construction sites. If that is your trade, treat the opt-out as unavailable and insure.
Misclassification is where the rest of the exposure sits. The Illinois Department of Labor enforces the Employee Classification Act, which presumes that an individual performing services for a construction contractor is an employee unless the criteria in Section 10 are met, and which requires the department to notify the Commission when it finds misclassification. Our explainer on what an independent contractor is covers the general distinction.
Where the Policy Comes From
Illinois employers buy workers’ compensation from private insurance carriers, normally through a licensed agent. The Commission says it directly: in Illinois, this insurance is sold in the private sector, and roughly 90 percent of employers buy a policy rather than self-insure.
There is no state fund here, which is worth naming because a few states run one and sell nothing else. In a monopolistic state the government fund is the only seller and employer’s liability protection has to be arranged separately. Illinois has the opposite problem, an abundance of sellers, and the Commission notes that more companies write this line here than in any other state, with the Department of Insurance publishing an annual market share report listing them. Carriers have set their own rates since 1983, with the National Council on Compensation Insurance publishing advisory rates rather than binding ones.
If nobody will write you, the market of last resort exists for exactly that. An agent can enroll you in the Illinois assigned risk plan, which the Commission notes is administered by the National Council on Compensation Insurance and prices premiums at roughly 50 percent above the open market. It is a residual market rather than a state fund, and it exists so that no employer is forced to operate uninsured.
Self-insurance is the third route, and Illinois splits the approval. The Commission oversees individual private self-insurers. The Department of Insurance evaluates group self-insurance pools formed under Article V 3/4 of the Illinois Insurance Code. Public employers may self-insure without approval at all.
| Self-insurance requirement | What Illinois asks for | Source |
|---|---|---|
| Who approves | The chairman of the Commission, on the recommendation of the Self-Insurers Advisory Board, after a review of financial condition, hazard, payroll and claim experience | IWCC self-insurance program |
| Timing | The application must reach the Commission at least 60 days before the requested effective date of self-insurance | 820 ILCS 305/4(a)(1) |
| Financial test | Points from zero to six on each of three ratios, current assets to current liabilities, capital and retained earnings to sales, and capital and retained earnings to long-term debt. A total of 9 or above creates a rebuttable presumption of approval | IWCC self-insurance program |
| Size test | None. There is no required minimum number of employees or amount of payroll to qualify | IWCC self-insurance program |
| Security | A minimum of $200,000, set by the Board and reassessed at each renewal, in the form of a surety bond, letter of credit or escrow deposit | IWCC self-insurance program |
| Security waiver | Available only after three consecutive years of self-insurance with a perfect score of 18 on the financial ratios for three consecutive audited years | IWCC self-insurance program |
| Fees | A nonrefundable application fee of $500 for each employer, and the same for each subsidiary included, on both initial and renewal applications | IWCC self-insurance program |
| Ongoing | Annual renewal, interim financial statements, prompt payment of benefits, accident reporting, and assessments to the Self-Insurers Security Fund, Rate Adjustment Fund, Second Injury Fund and Commission Operations Fund | IWCC self-insurance program |
| While the application is pending | The applicant must keep its insurance policy in force until the certificate of self-insurance issues, with the last day of coverage timed to the effective date so no gap opens | IWCC self-insurance program |
The Commission sets out the whole package on its self-insurance page, including the electronic filing portal and the renewal cycle. For a company of five to fifty people this is background rather than a live option. The working choice is a private policy, with the assigned risk plan behind it.
Whichever route you take, keep the carrier name, policy number and effective dates somewhere you can reach in under a minute. A general contractor will ask before you set foot on a site, your own workplace notice has to carry the same details, and coverage is publicly searchable through the Commission. If you operate in more than one state, our rundown of requirements by state shows where the thresholds differ.
Posters and What a Worker Receives
Illinois requires one workers’ compensation poster and no hiring packet. Section 6(a) of the Act requires every covered employer to post the Commission’s printed notice at its places of employment, and to post in a conspicuous place a notice stating whether it is insured or operating as a self-insured employer.
The insured version has to name the carrier with its address, the policy number, the effective date and the termination date. If the policy ends before that posted termination date for any reason, the statute says the posted notice must promptly be corrected. The self-insured version names the company servicing compensation payments and the person in charge of making them.
The Commission publishes this as form ICPN, the workplace notice, currently revised 1/2025, in English, Spanish, Polish and Mandarin Chinese. It carries a printed instruction that employers must display it in a prominent place in each workplace and complete the blocks underneath: party handling claims, business address, business phone, effective date, termination date, policy number and employer FEIN.
Now the part employers reverse. Illinois does not require a workers’ compensation booklet at hire. The Commission publishes its handbook on workers’ compensation under Section 15a and keeps it free on its website, and the workplace notice tells employees that once an accident is reported they should receive a handbook explaining the law, benefits and procedures. The trigger is the injury report, not the start date.
One document does have to be handed over, and only some employers have it. If you use a preferred provider program approved by the Department of Insurance, Section 8(a)(4)(A) requires you to inform the employee of that program in writing, on a form the Commission promulgates. The Commission publishes two: an advisory notice written to explain the program before anything happens, and a mandatory notice that opens by acknowledging a reported injury. Both exist in English and Spanish.
The reason it matters is the two-choice rule. Under Section 8(a) an injured employee may choose two providers and the chain of referrals from them. Where an approved program exists, declining it in writing counts as one of those two choices, and non-emergency treatment outside the network before the injury is reported counts as one as well. Wage and hour notices are a separate wall, covered on the Illinois minimum wage page.
Injury Reporting Deadlines
Illinois runs two main clocks after an injury, and they are different lengths. The employee has 45 days to tell you. You have 2 working days to report a death to the Commission and until the following month to report an injury that costs more than three scheduled workdays. The Commission collects these reports on the Employer’s First Report of Injury, known as Form 45.
| Who acts | Deadline | Detail and citation |
|---|---|---|
| Employee to employer | 45 days | Notice as soon as practicable and no later than 45 days after the accident, orally or in writing, giving the approximate date and place if known (6(c)) |
| Employee to employer, radiological exposure | 90 days | Running from the time the employee knows or suspects that he or she received an excessive dose of radiation (6(c)(2)) |
| Employee to employer, occupational disease | As soon as practicable | Running from the point the employee becomes aware of the condition, per the Commission’s handbook |
| Defective or inaccurate employee notice | Not automatically fatal | No defect or inaccuracy bars the proceeding unless the employer proves it was unduly prejudiced by it (6(c)) |
| Employer to its carrier | Promptly | Inform the insurance carrier or claims administrator even where you dispute the claim, per the Commission’s handbook |
| Employer to the Commission, death | 2 working days | A written report of every job-related death, filed no later than 2 working days after it (6(b)) |
| Employer to the Commission, lost time | Within the month | Required for injuries and illnesses causing the loss of more than 3 scheduled workdays. The statute directs that these reports be made between the 15th and the 25th of each month (6(b)) |
| Employer to the Commission, permanent disability | As soon as determined | A further report once it is determined that permanent disability has resulted or will result from the injury (6(b)) |
| Filing format | IAIABC 3.1 XML | All accident reports have been required in that electronic standard since June 14, 2019, and in practice the carrier transmits them |
| Employer to employee, if off work more than 3 days | Immediately | Begin temporary total disability payments, or give a written explanation of the further information you need, or a written explanation of why benefits are denied, per the Commission’s handbook |
| Employer to employee, rehabilitation | On the grant of compensation | Notify the employee of the right to rehabilitation services and the locations of available public rehabilitation centers (6(d)) |
| Employee filing a claim | 3 years or 2 years | An application for adjustment of claim must be filed within 3 years of the accident, or within 2 years of the last compensation payment, whichever is later (6(d)) |
| Failure to file a required report | Petty offense | Any of the reports required by Section 6 (6(b)) |
The reporting threshold trips people up because the trigger is lost time rather than severity. Section 6(b) requires the report only where the death, injury or illness costs more than three scheduled workdays, so a cut that heals over a long weekend usually produces no Form 45 at all. That does not switch off the records duty, which the same subsection writes as an exclusion: accurate records are required for everything beyond minor injuries needing only first aid and involving no further medical treatment, loss of consciousness, restriction of work or motion, or transfer to another job.
Benefit timing follows a different rule again, and employees ask about it on day two. Under Section 8(b) temporary total disability is payable from the fourth day where incapacity lasts more than three working days. Where the incapacity runs 14 days or more from the day of the accident, compensation commences on the day after the accident instead.
The forms, the reporting instructions and the electronic filing details all sit on the Commission’s forms page. Read it once before you need it, because the day you need it you will be doing three other things.
What Going Uninsured Costs
Illinois assesses up to $500 for every day an employer lacked coverage, with a minimum penalty of $10,000. Both the Commission and the Department of Insurance publish that figure, and the Department adds that an employer found noncompliant with Section 4(a) more than once may face up to $1,000 per day with a minimum of $20,000.
The operational penalty is the work-stop order. Where a panel of three Commissioners finds, after a hearing, that an employer knowingly failed to provide coverage, the failure is deemed an immediate serious danger to public health, safety and welfare, which justifies an order requiring the cessation of all business operations at the place of employment or job site. Law enforcement assists on request. The order lifts on proof of insurance. The Department of Insurance states that for a business declared extra hazardous, the Commission may issue the order even before holding a hearing.
| Exposure | Amount or consequence | Citation |
|---|---|---|
| Civil penalty for being uninsured | Up to $500 per day of noncompliance, minimum $10,000, deposited into the Injured Workers’ Benefit Fund | 820 ILCS 305/4(d) |
| Repeat noncompliance | Up to $1,000 per day, minimum $20,000, per the Illinois Department of Insurance | IDOI compliance guidance |
| Citation by an investigator | A fine of no less than $500 and no more than $2,500, payable with proof of insurance within 10 days of issue | 820 ILCS 305/4(d) |
| Work-stop order | Cessation of all business operations at the place of employment or job site until proof of insurance is produced | 820 ILCS 305/4(d) |
| Criminal, knowing failure | Class 4 felony for the individual employer, corporate officer or director, partner or LLC member. Each day is a separate offense | 820 ILCS 305/4(d) |
| Criminal, negligent failure | Class A misdemeanor on the same personal basis, each day a separate offense. Publicly owned corporations are excluded from both | 820 ILCS 305/4(d) |
| Good faith dispute | The criminal penalties do not apply where a good faith dispute exists over the employment relationship, with IRS employee definitions as evidence of good faith | 820 ILCS 305/4(d) |
| Loss of the Act’s protections | The employee may sue in civil court with unlimited damages. Assumption of risk, negligence and co-employee defenses are unavailable, proof of injury is prima facie evidence of employer negligence, and the employer may not join another defendant | 820 ILCS 305/4(d) |
| Personal liability for the penalty | Assessed against officers, directors, partners and members after a finding of knowing and willful failure. It attaches to them once the employer has not paid within 30 days of the final order | 820 ILCS 305/4(d) |
| Hiding assets to avoid paying benefits | Class 4 felony for the individual who transfers, conceals or destroys employer property with intent to avoid compensation | 820 ILCS 305/4(d) |
| Benefits paid in your place | The Injured Workers’ Benefit Fund pays the worker, and the Commission has the right to obtain reimbursement from the employer | 820 ILCS 305/4(d) |
Read the personal liability row twice if you run a corporation or an LLC. Liability for the assessed penalty runs against the named employer first, but where the Commission has found a knowing and willful failure by a named officer, director, partner or member, and the employer does not pay within 30 days of the final order, that individual owes the unpaid balance. The corporate shell does not absorb it.
The civil exposure is the one that ends businesses, though. Losing the protections of the Act converts a capped compensation claim into an ordinary lawsuit where damages are unlimited, and it strips the defenses you would otherwise raise while treating proof of the injury as prima facie evidence that you were negligent. The Department of Insurance sets out the same warning on its workers’ compensation compliance page, which is also where a worker goes to report an employer with no coverage.
What to Do When Someone Gets Hurt
Work the same sequence every time. The first three steps happen the same day, and the rest run on the clocks in the table above. Deciding whether the claim is legitimate is not on the list, because that call belongs to the carrier.
Then keep the file. Accident reports, restrictions, written explanations and the dates each was sent are exactly what gets requested later, and our walkthrough of the workers’ compensation audit shows how payroll classification and claim history feed next year’s premium.
Most of this is documentation discipline rather than legal judgment. FirstHR keeps injury paperwork, acknowledgments and policy documents attached to the employee record, so the notice you handed someone in March is still findable in November without anyone reconstructing it from memory.
Safety work sits next door and reduces how often you run the sequence at all. Illinois delegates private sector enforcement to federal inspectors while running its own public sector program, and the federal baseline is covered in our guide to OSHA requirements for employers.
Frequently Asked Questions
Does an Illinois business with one part-time employee need workers’ compensation?
Yes. The Commission states that one employee, even a part-time employee, obliges you to obtain coverage, and the Department of Insurance repeats the rule. There is no headcount minimum and no waiting period, because employees are covered from the moment they are hired. The Act arrives there through Section 3, which sweeps in any business selling goods or rendering services to the public at large with an annual payroll above $1,000, and any business using power driven equipment.
Can I leave myself out of the policy as the owner of an Illinois company?
Usually. Sections 3(17)(b) and 3(20) let sole proprietors, partners, bona fide corporate officers and LLC members withdraw themselves as individuals. An officer opts out by written notice to the insurance carrier, effective on receipt, and the Commission has no form for it. The exclusion is personal and never reaches your employees, and the Department of Insurance says it does not help employers in extra hazardous occupations such as construction or trucking.
Where does an Illinois employer buy a workers’ compensation policy?
From a private carrier, usually through a licensed agent. Illinois runs no state fund, insurance is sold in the private sector, and about 90 percent of employers buy a policy. Carriers have set their own rates since 1983. If nobody will write you, an agent can enroll you in the assigned risk plan administered by the National Council on Compensation Insurance, priced roughly 50 percent above the open market. Self-insurance requires Commission approval and at least $200,000 of security.
What must an Illinois employer post about workers’ compensation?
The Commission’s ICPN workplace notice, in a prominent place in each workplace. Section 6(a) requires it to state whether you are insured or self-insured, and the insured version must carry the carrier name and address, the policy number and the effective and termination dates. The Commission’s form adds a business phone block and your FEIN. If the policy ends early, the posted notice must promptly be corrected. The form is free in English, Spanish, Polish and Mandarin Chinese.
How fast does a work injury have to be reported in Illinois?
The employee gives notice as soon as practicable and no later than 45 days after the accident, orally or in writing, with 90 days allowed for radiological exposure. You report a job-related death to the Commission within 2 working days, and any injury costing more than three scheduled workdays within the month, in the IAIABC 3.1 XML standard that your carrier normally transmits. A further report follows once permanent disability is determined, and failing to file is a petty offense.
What happens if I have no coverage and someone gets hurt?
The Injured Workers’ Benefit Fund can pay the worker, and the Commission may recover from you. A knowing and willful failure to insure carries up to $500 per day with a $10,000 minimum, rising to $1,000 per day with a $20,000 minimum on a repeat finding. A three-Commissioner panel may order all business operations stopped. Knowing failure is a Class 4 felony for officers, partners and members, and negligent failure is a Class A misdemeanor. You also lose the defenses the Act would have given you.
Are independent contractors and household workers covered in Illinois?
Genuine contractors sit outside the Act, but the label is policed. The Employee Classification Act presumes that anyone performing services for a construction contractor is an employee unless Section 10 is satisfied, and the Department of Labor must notify the Commission when it finds misclassification. A private household becomes a covered employer only where domestic workers are employed 40 or more hours per week for 13 or more weeks in a calendar year, and agricultural operations fall outside where they use less than 400 working days of labor per quarter.
Illinois amends this Act more often than most employers check it. Our Illinois hiring guide covers what has to be in place before a first employee starts, and a policy in force on day one is on that list rather than something you arrange in the second month.