Traumatic brain injury — TBI — is the highest-stakes category in personal injury litigation. CDC reports approximately 2.5 million TBI-related emergency visits, 290,000 hospitalizations, and 60,000 deaths annually in the United States. Settlement values reflect the catastrophic nature: severe TBI cases routinely exceed $5 million, and the very largest verdicts top $50 million. But the per-case variance is enormous because TBI severity ranges from a 30-minute concussion with full recovery to lifelong dependency requiring 24-hour skilled care. This guide breaks down the medical classification, the legal damages framework, and the math behind 2026 TBI settlement valuation.
The Glasgow Coma Scale (GCS) scores three domains on a 3-15 scale:
| TBI Severity | GCS Score | LOC Duration | PTA Duration | Imaging |
|---|---|---|---|---|
| Mild (concussion) | 13-15 | 0-30 min | 0-24 hrs | Usually normal |
| Moderate | 9-12 | 30 min - 24 hrs | 1-7 days | Often abnormal |
| Severe | 3-8 | >24 hrs | >7 days | Abnormal |
| Severity | Median Settlement | Mean Settlement | Notes |
|---|---|---|---|
| Mild TBI (full recovery) | $25,000-$80,000 | $60,000 | Often disputed by defense |
| Mild TBI (persistent symptoms) | $80,000-$300,000 | $190,000 | Requires neuropsych evidence |
| Moderate TBI | $300,000-$1,500,000 | $850,000 | Surgical or rehab dependency |
| Severe TBI (functional) | $1,500,000-$5,000,000 | $3,200,000 | Permanent cognitive deficit |
| Severe TBI (catastrophic) | $5,000,000-$25,000,000+ | $12,000,000 | Lifetime care required |
| Wrongful death (TBI) | $1,500,000-$5,000,000+ | $3,500,000 | Beneficiary-state dependent |
| State | Cap on Non-Economic Damages | Affects TBI? |
|---|---|---|
| California | $350K-$750K (medical malpractice only, MICRA) | Only in med mal cases |
| Texas | $250K-$500K medical malpractice | Only in med mal |
| Florida | None (caps held unconstitutional) | No cap |
| Ohio | $250K/$500K cap on non-econ (non-catastrophic) in most PI | Affects mild/moderate; exemption for catastrophic |
| Tennessee | $750K cap (most cases); $1M catastrophic | Affects most TBI cases |
| Maryland | $890,000 (2024 adjustment for new cases) | Affects severe TBI |
| Other states | No general cap or specific cap structure | Varies |
A typical life care plan for moderate-to-severe TBI includes:
Facts: 32-year-old professional rear-ended at low speed. GCS 15 on arrival, brief LOC reported, CT normal. Neuropsych testing 6 months post shows impaired executive function and processing speed. Persistent headaches and sleep disturbance. Demoted at work, ~25% earnings reduction.
Facts: 24-year-old construction worker struck by drunk driver. Severe TBI (GCS 5 at arrival). Coma 18 days. Survives but with cognitive impairment, partial right-side hemiparesis, expressive aphasia. Can perform basic ADLs with supervision; cannot work; will require attendant care for life.
TBI settlements range widely by severity. Mild TBI (concussion): $50,000-$300,000. Moderate TBI: $300,000-$1,500,000. Severe TBI (with cognitive impairment): $1,500,000-$10,000,000+. Catastrophic TBI requiring lifelong care: $5,000,000-$25,000,000+. State law, insurance limits, and venue dramatically affect realized settlement amounts.
The Glasgow Coma Scale (GCS) is the most common classification: Mild TBI = GCS 13-15; Moderate TBI = GCS 9-12; Severe TBI = GCS 3-8. Other criteria include loss of consciousness duration, post-traumatic amnesia duration, and imaging findings. Mild TBI accounts for 75-80% of all TBIs and is sometimes called 'concussion' but can still cause permanent symptoms.
Neurological exam, CT or MRI imaging, neuropsychological testing battery (3-6 hours measuring cognition), neuropsychiatric assessment for mood/behavior changes, EEG, and sometimes specialized imaging (DTI, SPECT). Defense often challenges mild TBI cases as 'malingering' — strong objective evidence is critical.
A life care plan is a comprehensive document prepared by a certified life care planner (CLCP) projecting future medical, rehabilitation, equipment, attendant care, and modification costs over the plaintiff's expected lifespan. Plans are used by economists to compute present value of future damages. Life care plans for severe TBI often exceed $10 million in projected costs.
Vocational rehabilitation expert compares plaintiff's pre-injury earning trajectory with post-injury capacity. Forensic economist computes present value of the difference using earnings tables, work-life expectancy, and discount rate (typically 2-4% net real). A 35-year-old earning $75,000/year reduced to $20,000/year capacity could lose $1.5M+ in lifetime earnings.
Second impact syndrome is a rare but often fatal condition where a person who has not fully recovered from a prior concussion suffers a second head impact. Brain swelling is rapid and catastrophic. Particularly relevant in sports-related TBI cases involving inadequate concussion protocols, return-to-play decisions, and supervisory liability.
Yes. Persistent post-concussive symptoms affect 10-15% of mild TBI patients and can include cognitive deficits, headaches, mood disorders, sleep disorders, and dizziness lasting months or years. Even mild TBI can affect employment, relationships, and daily functioning. Settlement valuation must account for documented persistent symptoms.
Sources include at-fault driver's auto liability and umbrella, premises liability, workers' compensation (if work-related), homeowner's liability (if at residence), commercial general liability, product liability (if defective product caused injury), and the plaintiff's own UIM/UM and health insurance. TBI cases typically require maximum policy stacking — including umbrella coverage.