The 30-Second Answer
The Family and Medical Leave Act (FMLA) gives eligible Illinois workers up to 12 weeks of unpaid, job-protected leave per year — but the threshold to qualify is strict, and many workers discover too late that they do not meet it. You must work for an employer with 50 or more employees within 75 miles, have worked there for at least 12 months, and have logged at least 1,250 hours in the past year. Illinois also supplements FMLA with the Illinois Family Military Leave Act (820 ILCS 151/) and, as of January 1, 2024, the Paid Leave for All Workers Act (820 ILCS 192/), which provides up to 40 hours of paid leave regardless of employer size.
The Story
Josephine Park had been a billing coordinator at a medical group in Naperville for three years. When her mother was diagnosed with stage-three cancer, Josephine needed time — to drive her to chemotherapy in Chicago, to manage medications, to be present. She told her supervisor she needed to take leave to care for her mother. Her supervisor said, “We can’t really hold your position, but we’ll try.”
That was not the law. That was a supervisor guessing.
Josephine’s employer had 62 employees. She had worked there for three years and logged well over 1,250 hours in the past twelve months. She was FMLA-eligible. Her employer was required — not encouraged, required — to hold her position. When she returned from six weeks of leave, her job had been given to someone else. Her employer had committed two violations: interference and retaliation.
Josephine did not know she had rights until she called an attorney. By then, she had 180 days left on the FMLA clock.
The Details
The Family and Medical Leave Act of 1993 is administered by the U.S. Department of Labor and enforced through both agency complaints and private lawsuits. In Illinois, most FMLA cases are heard in the Northern District of Illinois (Chicago) under Seventh Circuit precedent.
The three eligibility requirements:
First, the employer must have 50 or more employees within a 75-mile radius of the employee’s worksite. Remote workers who report to or are assigned from a specific location use that location for the 75-mile count. Second, the employee must have worked for that employer for at least 12 months — though those months need not be consecutive. A worker who left and returned to the same employer can count prior service in some circumstances. Third, the employee must have worked at least 1,250 hours during the 12-month period immediately preceding the leave — roughly 24 hours per week. Part-time workers often fall short of this threshold.
What qualifies as a serious health condition: Under 29 CFR § 825.113, a serious health condition involves inpatient care or continuing treatment by a healthcare provider. Continuing treatment generally means incapacity for more than three consecutive calendar days plus at least two visits to a healthcare provider, or incapacity plus a regimen of continuing treatment. Chronic conditions — diabetes, asthma, migraines, PTSD — that cause episodic incapacity also qualify.
Qualifying reasons for FMLA leave: (1) Your own serious health condition. (2) Care for a spouse, child, or parent with a serious health condition. Note: in-laws, siblings, and domestic partners do not qualify under federal FMLA — though Illinois law may provide additional rights. (3) Birth, adoption, or foster placement of a child within 12 months of the event. (4) Qualifying military exigencies related to a family member’s active duty.
The Illinois add-ons: The Illinois Family Military Leave Act (820 ILCS 151/) fills a critical gap — it covers employers with 15 to 49 employees, a group entirely excluded from federal FMLA, providing up to 30 days of unpaid leave for family members of deployed service members. And the Paid Leave for All Workers Act (820 ILCS 192/), effective January 1, 2024, provides up to 40 hours of paid leave annually to virtually all Illinois workers regardless of employer size or reason for leave.
What the employer must do: When an employee requests FMLA leave or when the employer has enough information to recognize an FMLA-qualifying need, the employer must: (1) notify the employee of their FMLA eligibility within 5 business days; (2) provide a Rights and Responsibilities notice; (3) designate the leave as FMLA-qualifying; and (4) restore the employee to the same or an equivalent position upon return. Failure to do any of these is an interference violation under 29 U.S.C. § 2615.
The Toolkit
| Concept | What It Means | Why It Matters to You |
|---|---|---|
| 50-Employee Threshold | Your employer must have 50+ employees within 75 miles | Many DuPage County and suburban Cook County employers meet this — check before assuming you don’t qualify |
| 1,250-Hour Requirement | Must have worked ~24 hrs/week for the past year | Part-time, seasonal, and gig workers often fall short — verify your hours carefully |
| Intermittent Leave | FMLA can be taken in blocks, days, or hours | Chronic conditions like migraines or diabetes can qualify for leave taken an hour at a time |
| Illinois FMLA (820 ILCS 151/) | Covers employers with 15-49 employees for military family leave | Smaller employers not covered by federal FMLA still have Illinois obligations |
| Paid Leave for All Workers Act | Up to 40 hours paid leave/year, effective Jan. 1, 2024 | Covers virtually all Illinois workers regardless of employer size or reason for leave |
| Interference vs. Retaliation | Two separate FMLA violations with different legal elements | Even if your employer is not hostile, failing to restore your job is actionable interference |
The Algorithmic Shadow
Across Illinois in 2026, workforce management platforms are being used to flag employees who take “excessive” leave — and FMLA leave is increasingly showing up in these algorithms as a negative signal. Shift-scheduling software in retail, healthcare, and logistics automatically reassigns workers with frequent leave patterns to less desirable shifts or reduces their available hours. In some systems, repeated FMLA use triggers an automated review flag that lands in a supervisor’s dashboard labeled “attendance concern.” The supervisor sees a flag, not a federal protection.
This is FMLA interference, whether a human decided to do it or a machine did. Ahmad Sulaiman and Atlas Law Center are tracking how algorithmic workforce management creates systematic interference with FMLA rights — particularly for workers in hourly and shift-based jobs across Cook County and DuPage County. If your schedule changed, your hours dropped, or your status shifted after you took FMLA leave, that pattern is worth examining — even if nobody said a word to you about your leave.
Frequently Asked Questions
Does FMLA cover me if I work for a company with fewer than 50 employees in Illinois?
Federal FMLA does not. But the Illinois Family Military Leave Act (820 ILCS 151/) covers employers with 15 to 49 employees for military family leave. The Paid Leave for All Workers Act (820 ILCS 192/) covers virtually all Illinois employers regardless of size. And if you have a disability, the ADA and IHRA may require your employer to provide leave as a reasonable accommodation — regardless of employer size.
Can my employer deny my FMLA leave request?
If you are FMLA-eligible and the reason qualifies, your employer cannot deny the leave. They can require certification from a healthcare provider, and they can require you to use accrued paid leave concurrently. But they cannot refuse to grant the leave. Doing so is interference under 29 U.S.C. § 2615 — a federal violation subject to damages including lost wages and benefits.
What notice do I need to give before taking FMLA leave?
For foreseeable leave, you must give at least 30 days’ advance notice. For unforeseeable leave — a sudden hospitalization, an unexpected medical crisis — you must notify as soon as practicable, typically within one or two business days. You do not need to use the word “FMLA.” You just need to give your employer enough information to recognize the potential FMLA nature of the need.
Can I be fired while on FMLA leave?
Not because of your FMLA leave. However, an employer can terminate you during FMLA for a legitimate reason entirely unrelated to the leave — a pre-existing performance issue, a company-wide layoff, or documented misconduct. If you are fired during or shortly after FMLA leave, consult an attorney immediately. The timing alone is often enough to raise a retaliation claim.
What is the difference between FMLA interference and FMLA retaliation?
Interference means the employer denied, discouraged, or impeded your exercise of FMLA rights — including failing to restore your job. Retaliation means the employer punished you for using FMLA. The distinction matters because interference does not require proof of bad intent — if the employer failed to restore your position, that is interference regardless of their reason. Retaliation requires showing the leave was a motivating factor in the adverse action.
Does FMLA apply to mental health conditions in Illinois?
Yes. Depression, anxiety disorders, PTSD, and other mental health conditions qualify as serious health conditions under FMLA if they require continuing treatment by a healthcare provider and cause incapacity. A therapist, psychiatrist, or psychologist qualifies as a healthcare provider. Stigma around mental health conditions has caused many Illinois workers to not claim FMLA rights they are fully entitled to use.
Ahmad Sulaiman and Atlas Law Center represent Illinois workers whose FMLA rights have been interfered with or who have faced retaliation for taking protected leave. Whether you are in Chicago, Naperville, Lombard, or anywhere in Cook County or DuPage County, your leave rights are real — and we are here to enforce them.
Contact Atlas Law Center for a free consultation — Employment Law: (630) 394-6350 | Consumer Law: (331) 321-4748. Care first. Justice always.