There is no reliable average settlement for a mild traumatic brain injury. The ranges published across the internet vary by an order of magnitude between sources, because they pool cases with nothing in common — a concussion that resolved in three weeks and a permanent cognitive impairment sit in the same dataset. In a large share of these claims the ceiling is set by the at-fault party’s insurance policy rather than by the injury, which is why two people with similar injuries can end up in very different places.
What is worth understanding instead: why “mild” is a misleading label in a claim, why these cases are contested on the existence of the injury rather than its degree, and what actually determines the outcome.
Key Points
- Published ranges for mild TBI settlements disagree with each other so widely that none of them can be describing anything useful.
- Available insurance frequently caps what is collectible regardless of how the injury is valued.
- “Mild” describes how an injury presented initially. It is not a prediction about outcome, and it is not a statement about the claim.
- Normal imaging is the defence’s opening move, and it is not the end of the question.
- California limits past medical expenses to what was paid or incurred, so the billed total is not the number that counts.
- Settling before the picture is clear ends the claim for how things actually turn out.
Why the Published Ranges Are Worthless
Look at what is actually on offer if you search this. Different pages on the first page of results give ranges that overlap barely or not at all, each presented with equal confidence. Some add a severity table that assigns a bracket to each tier of symptom.
Three reasons none of it can help you.
The datasets are not comparable
“Mild traumatic brain injury” covers an enormous span of outcomes. A single label is applied to a concussion someone recovers from in weeks and to an injury that permanently changes how a person works and lives. Averaging across that describes a population, not a claim.
The tables reason backwards
The severity tables circulating on this topic assign a settlement bracket to a symptom picture — as though the outcome followed from the diagnosis. It does not. The outcome follows from what the medical record documents, how fault is apportioned, and what insurance exists. A tier chart skips all three.
The real constraint is usually coverage
This is the part almost nobody leads with, and it is what strangers on the internet tell people when they post an offer they think is too low: the first question is what the policy limit is.
Since January 1, 2025, California’s minimum liability limits have been $30,000 per person, $60,000 per accident, and $15,000 for property damage. Where the at-fault driver carries the minimum and has no meaningful assets, that policy is the practical ceiling however the injury is valued. It is why your own uninsured and underinsured motorist coverage is often the more important question than the strength of the claim, and why a settlement figure detached from a coverage picture tells you nothing.
What “Mild” Actually Means
The word does real damage here, in both directions.
In clinical use it describes how an injury presented at the outset — a classification of the initial event, not a forecast. It carries no promise about how someone will be in six months. Insurers nonetheless read it as a characterisation of severity, and so do claimants who assume a “mild” label means the claim is small.
The opposite error is just as common online, where law firm pages routinely imply that mild TBI is usually severe in disguise. That framing is self-serving, and it sets up an expectation that most claims will not meet. Whether symptoms persist in an individual case is a medical question, and the CDC and treating clinicians are the sources for it — not a law firm’s website.
These Claims Are Argued About Existence, Not Degree
Most injury claims are disputes about how bad something is. This category is frequently a dispute about whether there is anything there at all.
A milder brain injury often does not appear on standard imaging. Insurers know this, and the sequence is predictable: normal CT, normal MRI, subjective complaints, and an alternative explanation offered for the symptoms — stress, sleep, a pre-existing condition, ordinary life.
What answers that is not a scan. It is:
- Formal neuropsychological evaluation, where cognitive effects are in issue. This is often what moves a claim from assertion to evidence.
- Consistent symptom reporting across every provider, close in time, without contradictions in the record.
- Before-and-after evidence from other people. A spouse, a manager, a colleague describing what changed. In this injury category the injured person is frequently the least reliable reporter of their own condition, so observations from others carry unusual weight.
- Employment records showing changed duties, errors, reduced hours, or accommodations.
Our page on car accident head injuries covers the documentation problem in more detail.
What Actually Determines the Outcome
- What the record documents, and how early it was built. A gap between the incident and the first medical record is the most common causation argument in this category.
- Whether cognitive effects are objectively assessed rather than described.
- The documented effect on work and daily life — the categories California recognises are on our pain and suffering page.
- Economic loss, including future care and reduced earning capacity, which are projected with expert evidence rather than totalled from bills. Our economic damages page covers how, and why past medical expenses are limited to what was paid or incurred rather than billed.
- The apportionment of fault. California uses pure comparative fault, so every percentage point attributed to the injured person reduces the recovery.
- The insurance available, which frequently matters more than all of the above combined.
What to Avoid
- Settling before the picture is clear. A release ends the claim permanently, including for consequences nobody knew about at signing. In an injury category where the trajectory is uncertain for months, that is the most expensive mistake available. Our car accident settlements page covers what a release does.
- Gaps in treatment. Stopping when the acute phase passes, or not following through on referrals, gives the insurer its causation argument.
- Recorded statements early. Describing your symptoms to an adjuster before you understand them yourself produces a transcript you will be held to.
- Downplaying it. “I’m fine” is quoted back later, and in this category people often say it because they genuinely cannot perceive what has changed.
- Settlement calculators. A figure generated from a form has no relationship to your evidence, your fault picture, or the coverage available.
What a Fair Offer Looks Like
Not a number, because there is no benchmark to hold one against. What can be assessed is whether an offer reflects the inputs: the treatment documented to date, the care reasonably anticipated, the income loss established, the fault apportionment the insurer is applying, and the coverage actually available.
An offer that looks low against a published range may be reasonable against a minimum-limits policy. An offer that looks generous may be poor against a well-insured defendant and an unresolved medical picture. The range is the wrong comparator in both directions.
Brain Injury Claims on the Peninsula
Our office at 15 North Ellsworth Avenue, Suite 105, San Mateo, CA 94401 handles injury claims across San Mateo County, and civil matters for this area are generally heard in the San Mateo County Superior Court. These injuries arise in collisions involving cars, motorcycles, bicycles, and pedestrians, and in falls. More about the office is on our San Mateo page.
How Vaksman Khalfin Can Help
Our brain injury practice handles these claims where they are actually decided: making sure the right assessments happen and reach the record, gathering the before-and-after evidence from people who knew the person, establishing future care and earning capacity with the evidence those require, identifying every policy that may apply, and advising on timing rather than taking the first offer that arrives.
The practice is led by Alan D. Khalfin, admitted in California. We handle injury matters on a contingency-fee basis: there is no upfront attorney’s fee, and attorney’s fees are owed only if we recover compensation for you. Case costs are a separate category from attorney’s fees, and how both are handled is set out in the written fee agreement we go through with you before anything is signed. Initial consultations are free.
To speak with a California personal injury attorney, call 650-250-0705 or schedule a free consultation. Related reading: our California personal injury guides.
Reviewed by Alan D. Khalfin, Partner and Managing Attorney, Vaksman Khalfin, PC (admitted in California). Last reviewed: 09/08/2026
Frequently Asked Questions
There is no reliable average. The ranges published on this topic disagree with each other by an order of magnitude, because they pool cases with different injuries, different evidence, different fault apportionment, and different insurance limits. What determines an outcome is the documented injury and its effect on work and daily life, the share of fault assigned, and the coverage available to pay — and in many claims the coverage is the binding constraint.
Because they are describing different populations and none of them is describing yours. A label that covers both a concussion resolved in weeks and a permanent cognitive change cannot produce a meaningful average. Severity tables that assign a bracket to a symptom picture also reason backwards: they skip the evidence, the fault apportionment, and the available insurance, which are what actually decide the result.
No. "Mild" describes how the injury presented initially — it is a classification of the event, not a forecast about outcome and not a statement about the claim. The opposite assumption is also wrong: mild TBI is not usually severe in disguise. Which way an individual case goes is a medical question with a medical answer.
Possibly. Milder brain injuries frequently do not show on standard imaging, which is why these claims rest on clinical assessment, neuropsychological evaluation, consistent symptom reporting, and evidence of changed function. Normal imaging is the insurer's opening argument, not the end of the question.
There is no dependable average. The main drivers are how long it takes for the medical picture to stabilise, whether liability is contested, how contested the injury itself becomes, how many parties and policies are involved, and the court's calendar if a case is filed.
No. A figure produced from a form has no relationship to the evidence in your record, the fault apportionment being applied, or the insurance actually available — and those are the three things that decide the outcome.
Settling before the medical picture is clear, gaps in treatment, giving a recorded statement before you understand your own symptoms, and downplaying what has changed. Each of those is used later, and a signed release cannot be undone.
Less than the gross figure. Attorney's fees and case costs come out under the written fee agreement, and then hospital liens, health plan or public program reimbursement rights, and unpaid provider balances are resolved. Because liens are often negotiable, the net is not simple arithmetic.
