Mild TBI / Concussion Settlements in Illinois (2026)

For a moderate mild TBI or concussion case with clear liability in Illinois, reported settlements typically range from $54,000 to $126,000, with a midpoint around $90,000. This is not legal advice, and it's not your number — it's a calibration benchmark based on reported outcomes across similar cases. Your actual result depends on factors covered below.

What Moves the Number

Five factors do most of the work in separating the low end from the high end of that range.

1. Medical specials. Specials are your documented medical bills. A concussion case with $8,000 in ER and imaging costs sits in a very different place than one with $30,000 in neurologist visits, cognitive testing, and vestibular therapy. Adjusters and plaintiff attorneys both anchor to specials when calculating demand. More specials, higher range.

2. Objective findings vs. subjective complaints. A concussion that shows up on a neuropsychological evaluation or produces documented post-concussion syndrome — headaches, cognitive fog, sleep disruption recorded in medical notes over months — is worth materially more than one that resolves in two weeks with a clean follow-up. If your treating physician documented ongoing symptoms at 90 days, that matters. If there's a gap in treatment, adjusters will argue you recovered.

3. Lost wages and earning capacity. If you missed two weeks of work, that's one thing. If you're a 38-year-old project manager who couldn't work for three months and has documented cognitive deficits affecting your job performance, the lost-income component alone can add $20,000 to $50,000 to a demand. Self-employed plaintiffs have a harder time proving this without strong documentation.

4. Liability clarity. A rear-end collision where the other driver was cited and there's dashcam footage is not the same case as a multi-vehicle accident where your own fault is disputed. Illinois uses a modified comparative negligence rule — you can recover if you're 50% or less at fault, but your award is reduced by your percentage. At 30% fault, a $90,000 case becomes a $63,000 recovery. At 51%, you get nothing. Contested liability compresses settlement values because both sides are pricing in trial risk.

5. Where the case is filed. Cook County (Chicago) juries have a well-documented history of above-average plaintiff verdicts. A mild TBI case that might settle for $65,000 in a downstate venue could draw a $110,000 offer in Cook County simply because the defense is pricing in jury exposure. If you were injured in Chicago or the collar counties, that geography is working in your favor at the negotiating table.

The Math: How Demand Numbers Get Built

Plaintiff attorneys typically calculate opening demand by multiplying medical specials by a factor that reflects pain, suffering, and non-economic harm. For mild TBI cases, that multiplier generally runs 6x to 9x of specials — higher than soft-tissue-only cases because of the cognitive and neurological component.

Here's a worked example. Say your documented medical bills are $14,000: ER visit, CT scan, two neurology follow-ups, and a neuropsychological evaluation. You also lost $6,000 in wages during recovery. Total specials: $20,000.

At a 6x multiplier on medical bills alone, that's $84,000 in non-economic damages. Add $6,000 in lost wages, and the opening demand sits around $90,000 to $132,000 depending on how aggressively the attorney builds the file. Settlements typically land at 60–70% of opening demand after negotiation, which puts actual resolution somewhere in the $54,000 to $92,000 range for that fact pattern. That's squarely inside the typical range for a reason — the math is designed to produce outcomes in that zone.

If your specials crossed $25,000 and you had documented ongoing symptoms, the multiplier alone moves you toward the high end. A 9x multiplier on $25,000 in medical bills is $225,000 in non-economic damages before specials are even added. That's a $250,000+ demand. Settlements on cases like that can clear $126,000 without being outliers.

Why the Range Is Wide

A $72,000 spread between typical low and typical high isn't a flaw in the data. It reflects real variation in how these cases resolve.

Mild TBI is, by definition, a diagnosis with a wide clinical spectrum. Two people can both be diagnosed with a concussion after a car accident and have completely different trajectories — one recovers in three weeks, the other develops post-concussion syndrome lasting eight months. Insurers know this and they price accordingly. A case with a short treatment arc and no objective findings gets treated closer to a soft-tissue case. One with documented cognitive impairment and a neuropsychologist's report gets treated as a neurological injury.

Treatment gaps hurt. If you stopped treating for six weeks and then resumed, the defense will argue you recovered and then something else happened. That argument compresses the offer.

Surgical intervention, even if rare in concussion cases, dramatically changes the calculus. Any procedure — even a minor one related to a concurrent injury — signals severity and tends to push adjusters toward higher authority.

And jury venue, as noted above, is not a small factor. The same case can draw meaningfully different offers depending on whether the defense thinks it's heading to a Chicago courtroom or a rural downstate one.

Outliers: What Pushes Cases to the Extremes

Some mild TBI cases settle for $10,000 to $20,000. Some settle for $500,000 or more. Both happen, and neither is the norm.

Cases that land at the low end usually have one or more of these problems: minimal documented treatment, a significant gap between the accident and when the plaintiff first sought care, a liability dispute where the plaintiff carries substantial fault, or a policy limits problem where the at-fault driver carried only $25,000 in coverage and had no collectible assets. Policy limits are a ceiling. If the defendant is underinsured and you don't have underinsured motorist coverage, the math stops at their policy no matter what the case is worth on paper.

Cases that reach $500,000 or more on a mild TBI diagnosis typically involve a high-income plaintiff with documented cognitive impairment affecting their career, a well-funded defendant (a trucking company, a municipality, a commercial property), strong expert testimony, and a plaintiff-friendly venue. Those cases exist. They're not the benchmark.

Attorneys do materially change outcomes on cases with real injuries and real specials. Not because of magic, but because they know how to build a demand package, they have relationships with the right medical experts, and they understand what a particular venue's juries actually do. On a $90,000 case, the difference between a well-prepared file and a disorganized one can be $30,000 to $40,000 in the final offer.