Findlay Personal Injury Lawyers | May 21, 2026 | Personal Injury
A car accident concussion is a commonly underestimated injury that often arises from motor vehicle collisions. Many people assume that a concussion is a minor bump to the head and will resolve on its own, but a concussion is a traumatic brain injury (TBI) that can cause lasting cognitive, emotional, and physical effects. In Ontario, you can sue someone for giving you a concussion in an accident, and in serious cases, you may also be entitled to significant accident benefits and tort compensation.
Key Takeaways
- A concussion is a traumatic brain injury that can result from even a minor car accident, including low-speed collisions.
- You can sue the at-fault driver for a car accident concussion in Ontario under the tort system, provided your injury meets the verbal threshold under the Insurance Act.
- Concussion symptoms, including cognitive impairment, chronic headaches, mood changes, and sleep disruption, can affect your quality of life and earning capacity.
- Statutory Accident Benefits (SABs) are available immediately after a car accident concussion, regardless of fault, to cover medical and rehabilitation expenses.
- A traumatic brain injury lawyer can help you access all available compensation streams and fight insurer attempts to minimize the seriousness of your concussion.
- Automobile accident concussion settlements vary widely depending on the duration and severity of symptoms, your age, occupation, and whether you suffer from persistent post-concussion syndrome.
Can You Get a Concussion from a Minor Car Accident?
Can you get a concussion from a minor car accident? This is one of the most common questions asked after a low-speed collision. The brain does not require a dramatic impact to sustain a concussion. Any rapid acceleration or deceleration of the head, even without direct contact with a hard surface, can cause the brain to shift inside the skull and sustain a concussion after a car accident. In rear-end collisions at speeds as low as 10 to 20 km/h, the whipping motion of the head can be sufficient to cause a car accident concussion.
The absence of external head trauma, such as a cut, bruise, or bump, does not mean a concussion did not occur. Many car accident concussions happen with no visible signs of injury to the head. This is why a thorough medical assessment by a doctor experienced in brain injury, including neuropsychological testing if indicated, is so important after any collision where your head was jarred or moved suddenly.
Symptoms of a Car Accident Concussion
Symptom
Common Symptoms
When They Appear
Duration (Typical)
Physical
Headaches, dizziness, nausea, light sensitivity
Immediate to 48 hours
Days to months
Cognitive
Memory problems, difficulty concentrating, brain fog
Hours to days
Weeks to years
Emotional
Irritability, anxiety, depression, mood swings
Days to weeks
Months to years
Sleep
Insomnia, excessive sleepiness, disrupted patterns
Days to weeks
Months to years
Neurological
Ringing in ears, blurred vision, coordination problems
Immediate to days
Weeks to permanent
How Ontario Law Treats Concussion Claims
Statutory Accident Benefits for a Brain Injury
Regardless of who caused your accident, you are entitled to Statutory Accident Benefits (SABs) through your own automobile insurer. For a car accident concussion, SABs can cover neurological assessments and specialist consultations, physiotherapy, occupational therapy, and cognitive rehabilitation, psychological treatment, income replacement if you are unable to work, and attendant care if your concussion prevents you from managing daily activities. The standard SABs medical and rehabilitation limit for non-catastrophic injuries is $65,000, which can be exhausted in serious concussion cases.
If your car accident concussion qualifies as a catastrophic impairment, the available medical and rehabilitation benefits increase to $1,000,000. A traumatic brain injury lawyer can help you determine whether you may qualify for catastrophic designation.
Tort Claims and Concussion Lawsuits in Ontario
Beyond SABs, you can sue the at-fault driver in a concussion lawsuit. Ontario’s Insurance Act requires that your injury be permanent and serious to recover general damages for pain and suffering. A concussion that resolves within weeks typically does not meet this threshold. However, persistent post-concussion syndrome, which affects a meaningful portion of accident victims, may constitute a permanent and serious impairment of an important bodily function, qualifying you to sue someone for giving you a concussion.
Your concussion lawsuit can claim general damages for pain and suffering and loss of enjoyment of life, past income loss if your concussion prevented you from working, future income loss if you have long-term cognitive or functional impairments, future health care costs including specialist care, therapy, and medication, and loss of housekeeping capacity if your concussion affects your ability to perform domestic tasks.
What Affects the Value of an Automobile Accident Concussion Settlement?
Automobile accident concussion settlements vary based on several factors. The severity and duration of your concussion symptoms are the most important factors; a concussion that resolves in a month is valued very differently from persistent post-concussion syndrome lasting years. Your age and occupation matter because a younger professional with cognitive demands may suffer greater income loss from cognitive impairment than someone in a physically oriented role. Pre-existing conditions are also relevant; a prior history of concussion can affect how your current injury is assessed, though it does not bar your claim.
Medical documentation is central to the value of any automobile accident concussion settlement. Neuropsychological testing, specialist assessments, and functional evaluations provide objective evidence of your deficits. The strength of fault evidence (dashcam footage, police reports, witness statements) also affects settlement outcomes, as clear liability cases settle for more than disputed ones.
Working with a Traumatic Brain Injury Lawyer
Concussion and brain injury cases are among the most medically complex personal injury claims. Insurers frequently attempt to classify car accident concussions as minor injuries subject to the Minor Injury Guideline (MIG) and its much lower benefit limits. A traumatic brain injury lawyer understands the medical evidence needed to challenge MIG classification, the specialists who can provide the most persuasive assessments, and the legal strategies for building a strong concussion lawsuit.
If you have been injured in a car accident with a concussion or brain injury, understanding your legal options can make a real difference in the outcome of your case. Findlay Personal Injury Lawyers represents brain injury clients on a contingency fee basis, so you pay nothing unless we recover compensation for you. Contact us to get started.
FAQ
Can You Sue Someone for Giving You a Concussion in a Minor Crash?
Yes, if the concussion results in a permanent and serious impairment of an important bodily function. Minor crashes can and do cause concussions, and the law does not set a minimum speed or impact threshold for a concussion lawsuit. The key is whether your resulting injury meets Ontario’s verbal threshold for general damages and whether you have strong medical evidence of the injury and its effects. A traumatic brain injury lawyer can assess your situation.
How Long Does a Concussion Last After a Car Accident?
Most concussions resolve within a few days to four weeks. However, approximately 10–30% of concussion sufferers develop persistent post-concussion syndrome, with symptoms lasting months or even years. The risk of prolonged recovery is higher if you have had a prior concussion, are older, experience severe acute symptoms, or return to activity too quickly. For legal purposes, the duration of symptoms is central to whether your car accident concussion meets the threshold for a tort claim and what your automobile accident concussion settlement may be worth.
What Is the Difference Between a Concussion and a Traumatic Brain Injury?
A concussion is a type of traumatic brain injury, specifically a mild TBI. The TBI spectrum runs from mild (concussion) through moderate to severe (such as diffuse axonal injury or penetrating brain trauma). While a concussion is the mildest form of TBI, its effects can still be disabling, particularly in the context of persistent post-concussion syndrome. For legal purposes, the SABS uses specific medical criteria to assess brain injury severity and determine benefit entitlement.
What Documentation Do I Need for a Concussion Lawsuit?
A successful concussion lawsuit requires comprehensive medical documentation. This includes emergency room or urgent care records from the date of the accident, family doctor notes documenting your ongoing symptoms, specialist assessments from a neurologist or physiatrist, neuropsychological testing results that objectively measure cognitive deficits, occupational therapy reports that assess your functional limitations, and employment records showing income loss. Your traumatic brain injury lawyer will work with you to gather and organize this documentation.