Equal Pay Laws in Illinois: Gender Pay Gap Protections

**Step 1: Document the Wage Disparity and Related Evidence.** Gather all pay stubs, employment contracts, offer letters, and compensation records for yourself and similarly situated coworkers of different genders or sexual orientations. Document the job duties you perform: create a detailed list of your daily responsibilities, skills required, effort involved (physical and mental), and working conditions. Take screenshots or photographs of internal job postings, job descriptions, and organizational charts. Record dates, amounts, and reasons given by management for any pay changes or denials of raises. Note communications (emails, texts, recorded conversations where legal) in which pay differences were discussed or justified. Save this documentation securely, preferably in duplicate copies stored separately.

**Step 2: File an Internal Complaint and Follow Company Procedures.** Locate your employee handbook and identify the grievance or complaint procedure; most Illinois employers are required to have one. Submit a written complaint to HR or your manager (or skip to HR if your manager is the source of discrimination), clearly stating that you believe you are being paid less than similarly situated employees of different gender or sexual orientation for comparable work. Keep a copy of your complaint. Request a written response acknowledging receipt and outlining the company's investigation timeline. Document any retaliation or adverse actions taken after filing the complaint, as retaliation is illegal under Illinois law. This step is important for the administrative record and may demonstrate good faith; however, pursuing an internal complaint does not waive your right to file with the Illinois Department of Labor.

**Step 3: File an Administrative Charge with the Illinois Department of Labor and/or EEOC.** You have the option to file with the Illinois Department of Labor's Equal Pay Enforcement Unit or with the federal EEOC (which has worksharing agreements with Illinois). The Illinois Department of Labor does not have a posted statute of limitations for filing; complaints may be filed at any time, though evidence is strongest when filed promptly. To file with the Illinois Department of Labor, visit www.cyberdriveillinois.com/departments/labor or call 217-782-9397. You will need to provide: your name, contact information, current and former employer name and address, job title, dates of employment, names and job titles of comparators (coworkers of different gender/sexual orientation earning more), specific wage amounts and dates, job duties description, and written narrative explaining the pay disparity and how your job is comparable. To file a federal EEOC charge, visit eeoc.gov, call 1-800-669-4000, or visit your nearest EEOC field office. The federal deadline is 180 days from the discriminatory action in non-deferral states or 300 days in deferral states like Illinois (which has an agency agreement with the EEOC). Illinois state employees and political subdivisions should file with the Illinois Department of Labor, while private sector employees may file with either agency. Filing with one agency may trigger automatic worksharing with the other.

**Step 4: Understand the Investigation Process and Timeline.** Once filed, the Illinois Department of Labor will assign an investigator who will contact you and your employer. The investigation typically takes 60-180 days but may be extended. The investigator will request documents: payroll records, job descriptions, performance evaluations, compensation history, and hiring/promotion records for you and your comparators. Both parties (you and the employer) will be asked to provide written statements and supporting evidence. The investigator may conduct interviews with you, your employer, HR personnel, coworkers, and supervisors. Your employer will be required to explain the legitimate, job-related reasons for any pay difference. Expect the employer to argue that jobs are not comparable, that other factors (seniority, individual performance, production) justify the difference, or that your pay was based on market data or negotiation. Once the investigation concludes, the Department of Labor will issue a determination letter stating whether probable cause exists that a violation occurred. If probable cause is found, the employer will be offered an opportunity to resolve the matter through conciliation (settlement negotiation). If conciliation fails, you may proceed to the civil litigation phase.

**Step 5: Consult an Attorney and Pursue Litigation or Settlement.** If the Department of Labor finds probable cause, consult an employment law attorney licensed in Illinois who specializes in wage and hour or discrimination law. Many employment attorneys work on contingency (no upfront fee; payment from settlement or judgment). Your attorney can negotiate settlement with the employer, negotiate with the Department of Labor's conciliation officer, or file a civil lawsuit in Illinois state court or federal court. Under Illinois law, you are entitled to recover unpaid wages for up to 5 years prior to filing, statutory damages, penalties up to $2,500 per violation, and attorney's fees and costs. The burden shifts to the employer to prove that pay differences are justified by seniority, merit, production, or other legitimate factors. Your attorney will advise whether to pursue a class or collective action (joining with other affected employees), which may increase leverage and recovery. Do not delay—while there is no administrative statute of limitations, civil litigation may be subject to discovery rule limitations depending on when the violation is discovered.