A traumatic brain injury lawsuit is a civil case where you seek money damages from the person or organisation whose negligence or wrongdoing caused your injury.
The lawsuit covers medical costs you've already paid, ongoing treatment and rehabilitation, lost wages, and compensation for pain, cognitive changes, and reduced quality of life. You do not need to prove criminal intent — only that someone failed to act with reasonable care and that failure directly caused your brain injury. This is different from a criminal case, which the government pursues separately.
Most TBI lawsuits settle before trial. Your lawyer and the defendant's insurance company negotiate a lump sum or structured payment plan. If you cannot reach agreement, the case goes to court, where a judge or jury decides whether the defendant is liable and how much you should receive. The entire process typically takes one to three years, though complex cases take longer.
Key Takeaways
- You have a limited window to file — usually two to three years from the date of injury, depending on your state, so contact a lawyer early even if you are still in treatment.
- Your lawyer works on contingency in most TBI cases, meaning they take a percentage of your settlement or judgment and you pay nothing upfront.
- The defendant's insurance company will investigate your injury and may argue your symptoms are not as severe as you claim, so detailed medical records and ongoing treatment matter.
- Settlement amounts vary widely based on age, earning capacity, severity of cognitive or physical changes, and whether liability is clear or disputed.
- You can pursue a lawsuit even while receiving workers' compensation or disability benefits, though the rules about what you can recover differ by state.
Types of cases where a TBI lawsuit makes sense
A lawsuit is most straightforward when someone else's negligence directly caused your injury and liability is clear. Car accidents where another driver ran a red light, falls caused by a property owner's failure to fix a hazard, or a workplace injury where your employer ignored safety rules are common examples. In these cases, the defendant's insurance company usually knows they will lose and focuses on negotiating the amount rather than denying fault.
Medical malpractice cases are more complex. If a doctor's error during surgery or treatment worsened your brain injury, you have grounds to sue, but you will need an informed witness — another doctor — to testify that the defendant's care fell below the standard expected in that field. These cases take longer and cost more to pursue because the informed testimony is expensive.
Product liability cases arise when a defective helmet, vehicle safety system, or other product failed to protect you as designed. Assault cases, where someone intentionally harmed you, also support lawsuits, though collecting money from an individual attacker is often difficult; you may recover more from a business that failed to provide adequate security.
The statute of limitations: why timing matters
The statute of limitations is the important date for filing a lawsuit. In most states, you have two to three years from the date of your injury to file in civil court. A few states allow longer — up to six years — and some allow less. If you miss the important date, you lose the right to sue, with rare exceptions.
This important date matters even if you are still in acute treatment or rehabilitation. Brain injuries often reveal their full impact over months or years, so you may not know the extent of your cognitive or physical changes when the injury first happens. Contact a lawyer within the first year anyway. They can file a case before the important date and then continue investigating and negotiating while you heal. You do not have to go to trial when ready.
One exception: if you were a minor when injured, the clock usually does not start until you turn 18. If you were declared legally incompetent, the important date may be extended. Ask a lawyer in your state about these exceptions — they vary.
How contingency fees work and what they cost you
Most TBI lawyers work on contingency, meaning they take a percentage of your settlement or judgment and you pay nothing upfront. The percentage is usually 25 to 40 percent, depending on the complexity of the case and whether it settles or goes to trial. If you lose, you owe the lawyer nothing.
You will still pay certain costs out of pocket or from your settlement: court filing fees, informed witness fees, medical record requests, and costs to depose the defendant or their witnesses. These are called case costs or litigation expenses. Some lawyers advance these costs and deduct them from your settlement; others ask you to pay them as they arise. Ask about this in your first conversation.
If your settlement is $100,000 and your lawyer's fee is 33 percent, you receive $67,000 minus case costs. If case costs were $5,000, your net is $62,000. The lawyer receives $33,000. This is why lawyers are motivated to settle for the highest amount possible — their fee grows with yours.
What the defendant's insurance company will investigate
Once you file a lawsuit or notify the defendant's insurance company of your claim, they will investigate your injury thoroughly. They will request your medical records, imaging (CT scans, MRIs), neuropsychological test results, and rehabilitation records. They will interview witnesses, review police reports, and sometimes hire their own doctor to examine you or review your medical file.
Insurance companies often challenge the severity of TBI claims because brain injuries are invisible and symptoms can overlap with other conditions like depression or anxiety. They may argue that your cognitive problems existed before the injury, that you are exaggerating your symptoms, or that your current problems are not caused by the accident. This is why consistent, detailed medical documentation matters. If you stop treatment or miss appointments, the insurance company will use that against you, arguing your injury was not serious enough to require ongoing care.
They will also investigate your background: your work history, income, education, and any prior injuries or mental health conditions. This is not personal — it is how they calculate what your future earning capacity would have been if you had not been injured, which affects the damages you can claim.
Settlement negotiation and what affects the amount
Most cases settle through negotiation. Your lawyer sends a demand letter to the defendant's insurance company, outlining the injury, your medical treatment, lost wages, and the amount you are seeking. The insurance company makes a counteroffer. You and your lawyer discuss whether to accept, reject, or counter again. This back-and-forth can take weeks or months.
Settlement amounts depend on several factors. Age and earning capacity matter significantly — a 35-year-old who can no longer work earns more in damages than a 70-year-old. Severity of cognitive or physical changes affects the amount; permanent memory loss or inability to return to your profession is worth more than temporary symptoms that resolve. Clarity of liability also matters; if the defendant is obviously at fault, the settlement is usually higher than if liability is disputed. Quality of medical evidence — whether you have clear imaging, consistent doctor notes, and informed testimony — strengthens your claim.
There is no standard formula. Two similar-sounding injuries can settle for very different amounts depending on the specific facts, the jurisdiction, and the insurance company's assessment of trial risk. Your lawyer will research comparable cases in your area and advise you on a reasonable range.
Going to trial if settlement fails
If you and the defendant cannot agree on a settlement, your case goes to trial. A judge or jury hears evidence from both sides, including your testimony, medical informed testimony, and testimony from the defendant or their witnesses. Your lawyer presents your case; the defendant's lawyer argues theirs. The judge or jury then decides whether the defendant is liable and, if so, how much you should receive.
Trial is public, time-consuming, and unpredictable. You will testify about your injury and how it has affected your life — your work, relationships, daily activities, and emotional state. This is difficult and personal. The defendant's lawyer will cross-examine you, sometimes aggressively, to challenge your account or suggest your symptoms are not as severe as you claim. Medical experts on both sides will present conflicting opinions about the cause and severity of your injury.
Trials are expensive. Your lawyer's fees may increase if the case goes to trial rather than settling, and case costs rise as well. However, if you win, the judgment can be higher than a settlement offer because the jury may award more than the insurance company was willing to pay. If you lose, you receive nothing and still owe your lawyer's costs.
Interaction with workers' compensation and disability benefits
If your TBI happened at work, you likely received workers' compensation benefits — medical treatment and a portion of lost wages paid by your employer's insurance. You can still sue a third party (someone other than your employer) whose negligence contributed to your injury. For example, if a delivery driver hit you while you were working, you can sue the delivery company even though workers' compensation covered your initial treatment.
However, some states require you to repay workers' compensation from your lawsuit settlement — a process called a lien. The workers' compensation insurer takes a portion of your settlement to recover what they paid for your medical care and lost wages. The amount varies by state and by what benefits you received. Your lawyer will handle this; it does not prevent you from suing, but it reduces your net recovery.
If you receive Social Security Disability Insurance (SSDI) or Supplemental Security Income (SSI), a lawsuit settlement can affect your benefits. Large lump-sum settlements may disqualify you from SSI, which has strict asset limits. Structured settlements — where you receive payments over time rather than a lump sum — can preserve your may be able to access. Discuss this with your lawyer and your benefits counselor before accepting any settlement.
Frequently Asked Questions
How long does a TBI lawsuit usually take?
Most cases settle within one to two years. Cases that go to trial take longer — sometimes three to five years from injury to final judgment. The timeline depends on how quickly you receive medical records, how complex the liability question is, and how busy the court is in your area.
What if I cannot afford a lawyer?
Contingency representation means you do not pay upfront. If no lawyer will take your case on contingency, you may find a lawyer who charges an hourly rate but allows you to pay from your settlement. Legal aid organisations sometimes help with TBI cases, though they typically focus on low-income individuals. Contact your state bar association for referrals.
Can I sue if the accident was partly my fault?
Yes, in most states. If you were partly negligent — for example, you were not wearing a seatbelt — you can still recover, but your settlement is reduced by your percentage of fault. Some states bar recovery if you were more than 50 percent at fault. Ask your lawyer how your state's comparative negligence rule applies to your situation.
What if the person who caused my injury has no insurance or no money?
You can still sue, but collecting is difficult. If the defendant has no assets and no insurance, a judgment against them may be uncollectible. Some states allow you to sue the defendant's employer or a business that hired them. Uninsured motorist coverage on your own auto insurance may also cover you if you were hit by an uninsured driver. Ask your lawyer whether these options exist in your case.
Do I have to testify in court?
If your case goes to trial, yes — you will likely testify. If your case settles, you will not go to court, though you may give a recorded statement or deposition to the insurance company. Your lawyer will prepare you for either scenario.