How Long Does an Illinois EEOC Investigation Take

If you filed a charge with the EEOC or the Illinois Department of Human Rights (IDHR), you already know the hardest part isn’t the paperwork. It’s the waiting. Months go by. You check your email. You hear nothing. You start wondering if anything is actually happening.

This is normal, but it’s frustrating. The timeline varies a lot depending on which agency is handling your charge and what type of discrimination claim you filed.

If you’re also evaluating a severance agreement while your charge is pending, you need a severance agreement lawyer who understands how these two tracks interact. Getting that sequence wrong can cost you.

Filing With the EEOC vs. the IDHR

Most Illinois employees can file with either the EEOC or the IDHR. The two agencies have a worksharing agreement, which means filing with one is generally treated as a filing with both.

But they don’t operate the same way, and the timelines are different.

EEOC basics:

• Covers employers with 15 or more employees (20 for age discrimination under the ADEA)
• You have 300 days from the discriminatory act to file in Illinois
• The EEOC can investigate, attempt mediation, or issue a “right to sue” letter
• Governing federal law: Title VII of the Civil Rights Act of 1964, the ADEA, and the ADA

IDHR basics:

• Covers employers with one or more employees under the Illinois Human Rights Act (IHRA), 775 ILCS 5
• As of January 1, 2025, you now have two years from the discriminatory act to file, extended from the former 300-day deadline
• Charges go through an intake process, then a formal investigation
• The IDHR has its own adjudicatory body, the Illinois Human Rights Commission (IHRC), where cases proceed if not resolved earlier

For employees at small Illinois companies, the IDHR is often the more practical route since Title VII doesn’t apply to companies with fewer than 15 employees.

And with the extended two-year window under Illinois law, employees who miss the federal deadline may still have a viable state claim.

How Long Does the EEOC Actually Take?

Realistically, EEOC investigations take anywhere from 6 months to over 2 years. The agency processes a high volume of charges with limited staff, and complex cases involving multiple witnesses or substantial document review take longer.

Here’s how the EEOC process generally unfolds after you file:

1. Intake and charge assignment: Your charge is reviewed, assigned a charge number, and sent to the respondent (your employer), who is given the opportunity to respond
2. Mediation: The EEOC may offer both sides the chance to resolve the charge through voluntary mediation; this can wrap up in weeks if both parties agree
3. Investigation: If mediation doesn’t happen or fails, an investigator reviews documents, interviews witnesses, and may request additional information from both sides
4. Determination: The EEOC issues either a “cause” finding (evidence supports the charge) or a “no cause” finding (insufficient evidence), or it may issue a right to sue letter without a finding
5. Conciliation: If cause is found, the EEOC attempts to resolve the matter before authorizing a lawsuit

If the EEOC closes your charge without resolution, you receive a right-to-sue letter, and you have 90 days to file a lawsuit in federal court. That deadline is strict.

How Long Does the IDHR Investigation Take?

The IDHR process has its own structure and a significant procedural change took effect on January 1, 2026.

After you file, here’s the general sequence:

1. Intake review: IDHR confirms it has jurisdiction and that the charge was timely filed
2. Fact-finding: The assigned investigator contacts both parties, requests position statements and documents, and may conduct interviews. As of 2026, fact-finding conferences are no longer automatic. Either party can request one, but doing so extends the investigation period by 120 days
3. Investigative report: The investigator prepares a report and recommendation
4. Director’s determination: The IDHR Director issues a finding of “substantial evidence” or “no substantial evidence”

If substantial evidence is found, your case moves to the Illinois Human Rights Commission for a formal hearing.

If the IDHR finds no substantial evidence, you can request a review before the IHRC or file a lawsuit in state court. The IDHR targets a 365-day window to complete investigations, though complex cases routinely run longer.

What Happens After the Investigation Ends?

An investigation closing is not the end of your legal options. It’s often the beginning of the next phase.

If the EEOC issues a right-to-sue letter:

• You have 90 days to file in federal court. This deadline is not flexible.
• The letter doesn’t mean the EEOC found your claim weak; it often just means the agency couldn’t resolve it administratively
• Have an attorney reviewing your options before that clock runs out

If the IDHR finds substantial evidence:

• Your case moves to the Illinois Human Rights Commission
• The IHRC assigns an Administrative Law Judge and schedules a hearing
• Both sides present evidence, call witnesses, and submit legal arguments
• The ALJ issues a recommended order; the full Commission then issues a final ruling
• Beginning in 2026, the IHRC also has expanded authority to impose civil penalties to vindicate the public interest, in addition to ordering traditional remedies like back pay and reinstatement

If the IDHR finds no substantial evidence:

• You can request a review before the Illinois Human Rights Commission
• You can also file a complaint directly in the Illinois Circuit Court within the applicable deadline stated in your dismissal notice

What You Should Do While the Investigation Is Pending

The months you spend waiting aren’t wasted time. They’re an opportunity to build a stronger case.

Here’s what matters during the pendency period:

• Keep documenting. If retaliation or new discriminatory acts occur after you file, document them immediately. They may give rise to a separate charge or strengthen your existing one.
• Preserve all evidence. Text messages, emails, performance reviews, pay stubs. Save everything. Don’t rely on your employer’s systems.
• Watch severance deadlines. If your employer offers severance while your charge is pending, that package comes with signing deadlines and release language. Signing away your rights without legal review is a serious mistake.
• Respond promptly to your investigator. Delays on your end can slow the process and affect your credibility with the agency.
• Get an attorney involved. If you haven’t already, now is the time. The investigative record being built right now is the foundation for anything that follows.

How a Pending Charge Affects a Severance Agreement

If you’re sitting on a severance offer while your EEOC or IDHR charge is open, you’re in a legally significant situation. Most severance agreements include a release of claims, language that extinguishes your right to sue your employer for the discrimination you just reported.

Under the Older Workers Benefit Protection Act, employees over 40 have specific protections: they must be given 21 days to consider the agreement and 7 days to revoke after signing. But those protections don’t automatically cover every type of claim in every situation.

A severance agreement lawyer can tell you what claims you’d be releasing, whether the amount offered is reasonable given your pending charge, and whether there’s room to negotiate.

Signing without that analysis is one of the most common ways employees leave money and rights on the table.

Get Legal Help Today

Whether you’re at the beginning of an investigation or waiting on a final determination, the decisions you make right now matter. Missed deadlines, premature settlements, and unreviewed releases are the most common ways employees lose leverage they didn’t know they had.

If you’re facing a pending charge or trying to decide whether to accept a severance offer, contact 1818 for a free consultation. We’ll give you a straight read on where things stand and what your options are.