In Illinois, there is no single law that defines part-time employment by a specific number of hours, so what counts as part time in Illinois depends on which rule you are asking about. Most employers draw the line somewhere between 30 and 35 hours per week, borrowing from the Affordable Care Act’s 30-hour threshold for health coverage. For wages, overtime, workers’ compensation, anti-discrimination protection, and most other core rights, your hour count does not change what you are owed.
The Hour Thresholds That Actually Matter
No Illinois statute picks a weekly hour count and labels everything below it part-time. The number you run into most often is the ACA’s: a full-time employee is someone averaging at least 30 hours of service per week or 130 hours per month. That definition drives employer health insurance obligations, not wages or workplace safety rules, but many employers extend it to their internal full-time/part-time labels because scheduling and benefits track together.
The Illinois Department of Employment Security uses a functional test rather than a fixed number. If you are working fewer hours than your normal full-time schedule and earning less than your weekly benefit amount, you may qualify for partial unemployment.1 So the honest answer to “how many hours is part-time” is that it depends on the benefit or protection at issue. For ACA health coverage, under 30 hours per week. For your employer’s internal policies, whatever the handbook says. For most legal rights, it does not matter at all.
Minimum Wage and Overtime Apply No Matter Your Hours
Part-time employees in Illinois must be paid at least the state minimum wage, which is $15.00 per hour for workers 18 and older as of January 1, 2026. Workers under 18 who log fewer than 650 hours in a calendar year earn a lower minimum of $13.00 per hour. Tipped employees may be paid 60 percent of the standard minimum wage, or $9.00 per hour, as long as tips bring total compensation up to at least $15.00 per hour. These rates apply to employers with four or more employees, excluding family members.
Overtime does not care whether you are classified as part-time or full-time. Any employee who works more than 40 hours in a single workweek must receive overtime pay at one and one-half times the regular hourly rate, under both Illinois law and the federal Fair Labor Standards Act. If you normally work 25 hours a week but pick up a few shifts and cross 40 in a given week, you are owed overtime for the hours above 40.
Paid Leave for All Workers Act
The Paid Leave for All Workers Act took effect January 1, 2024, and it changed the picture significantly for part-time employees. The law requires Illinois employers to provide paid leave that accrues at a rate of one hour for every 40 hours worked, up to a minimum of 40 hours in a 12-month period. You can use the leave for any reason: illness, a family obligation, a personal appointment, anything.
Employers can set a reasonable minimum increment for leave usage, but that increment cannot exceed two hours per day. If your scheduled shift is shorter than two hours, the employer must use your actual scheduled hours as the minimum. Unused leave carries over year to year, though employers are not required to let you use more than 40 hours in any single 12-month period unless they choose to offer more. Employers can also frontload the full 40 hours at the start of the leave year instead of tracking accrual.
The law covers nearly all workers in Illinois. Narrow exceptions apply to railroad employees, certain college students working at their own school, and short-term higher-education employees hired for fewer than two consecutive calendar quarters.
Where Part-Time Hours Can Cost You
Two important benefits depend on hitting hour thresholds, and this is where part-time status can genuinely cut you out.
FMLA Leave
The federal Family and Medical Leave Act provides up to 12 weeks of unpaid, job-protected leave per year for qualifying medical and family situations. Part-time employees are eligible, but they have to clear three bars: at least 12 months with the employer, at least 1,250 hours of actual work during those 12 months, and a worksite where the employer has 50 or more employees within 75 miles. The 12 months do not have to be consecutive, though generally only employment within the last seven years counts.
The 1,250-hour threshold is the hurdle most part-timers trip over. An employee averaging 24 hours per week lands at roughly 1,248 hours in a year, just short. If you are anywhere near that line and might need FMLA leave for the birth of a child, your own serious health condition, or caring for a spouse or parent, track your actual hours closely.
Health Insurance
The ACA requires businesses with 50 or more full-time equivalent employees to offer health coverage to workers averaging 30 or more hours per week. If you work under that consistently, your employer has no ACA obligation to offer you coverage. Some employers cap part-time schedules at 29 hours specifically to stay below the insurance trigger.
If you did have employer-sponsored coverage and your hours drop enough to lose eligibility, that reduction counts as a qualifying event under COBRA, which lets you continue the same group health plan for a limited period (typically 18 months) at the full premium plus a small administrative fee. COBRA applies to employers with 20 or more employees.
Retirement Plan Access After SECURE 2.0
Federal law used to let employers exclude part-time workers from 401(k) plans if they worked fewer than 1,000 hours in a year. The SECURE Act and SECURE 2.0 Act changed that. Starting with plan years after December 31, 2024, employers must allow long-term part-time employees to participate in 401(k) plans if they have worked at least 500 hours in each of two consecutive 12-month periods and have reached age 21. The same rule extends to 403(b) retirement plans.
For vesting purposes, each 12-month period in which a long-term part-time employee works at least 500 hours counts as a year of vesting service, though periods before January 1, 2021, do not count. Employers are not required to match contributions for these employees unless their plan documents say otherwise, but the ability to make elective deferrals is now guaranteed.
Protections That Do Not Depend on Hours
Several core protections apply the same way whether you work 10 hours a week or 50.
Anti-Discrimination
The Illinois Human Rights Act protects part-time employees from workplace discrimination on the same terms as full-time employees. The protected categories are broad: race, color, religion, sex, national origin, ancestry, age (40 and older), marital status, disability, military status, sexual orientation, gender identity, pregnancy, arrest record, conviction record, citizenship status, order of protection status, family responsibilities, reproductive health decisions, and work authorization status. Employers cannot use part-time status as cover for decisions actually driven by any of these characteristics. The Act also prohibits harassment based on any protected category and defines “working environment” broadly enough that it is not limited to a physical office or job site. Charges go to the Illinois Department of Human Rights.
Workers’ Compensation
Workers’ compensation coverage in Illinois does not depend on full-time or part-time status. If you suffer a work-related injury or illness, the Illinois Workers’ Compensation Act entitles you to medical treatment, rehabilitation, and partial wage replacement while you recover, regardless of fault. Even a single shift can give rise to a valid claim. Report any work-related injury to your employer as soon as possible, because delays can complicate the claim.
Wage Payment and Pay Stubs
The Illinois Wage Payment and Collection Act applies to all employers and employees in the state, including part-timers, except state and federal government employees. Employers must pay every employee at least semi-monthly, and all wages earned during a pay period must be delivered no later than 13 days after that pay period ends. Pay stubs must itemize hours worked, rate of pay, overtime hours, gross wages, deductions, and year-to-date totals. The Act also covers commissions, bonuses, and vacation pay earned under an employment agreement. Complaints go to the Illinois Department of Labor.
Partial Unemployment
Part-time workers can qualify for unemployment benefits, including partial benefits when hours are reduced. You must have earned at least $1,600 during your base period and at least $440 outside your highest-earning quarter, and you must be able to work, available for work, and actively searching. If you are still working part-time but earning less than your weekly benefit amount, earnings up to 50 percent of that amount are disregarded, and earnings above the 50 percent threshold are deducted dollar-for-dollar. Working full-time hours in a given week disqualifies you for that week regardless of how little you earned.
Watch for Contractor Misclassification
Part-time work and independent contracting can look similar, but the legal consequences are not. An employee gets minimum wage, overtime, unemployment, and workers’ compensation. An independent contractor gets none of those. The federal economic reality test asks whether a worker is genuinely in business for themselves or economically dependent on the employer, with the most weight on how much control the employer exercises and whether the worker has a real chance at profit or loss based on their own initiative and investment. Skill required, permanence of the relationship, and whether the work is part of the employer’s core operations also matter.
If a business labels you a contractor but you work set hours, use company equipment, and have no other clients, you are likely an employee under the law. Misclassified workers can recover back wages and an equal amount in liquidated damages, plus attorney’s fees. The statute of limitations is two years for standard violations and three years for willful ones. Both the Illinois Department of Labor and the U.S. Department of Labor accept complaints.
Hour Limits for Workers Under 18
Teenagers working part-time face their own set of rules. Federal child labor law bars 14- and 15-year-olds from working more than 3 hours on a school day or more than 18 hours total in a week when school is in session. Illinois sets a lower minimum wage of $13.00 per hour for workers under 18 who log fewer than 650 hours in a calendar year, so crossing 650 hours in a year moves a teenage worker to the full adult minimum wage.