Someone has suggested, or you have started to worry on your own, that you might share some of the blame for what happened. Maybe the police report mentions something about your driving. Maybe the other driver is claiming you did something that contributed to the collision. Maybe you yourself are not entirely sure that you were completely blameless, and you have been carrying that uncertainty while also dealing with real injuries and a claim you do not know whether you can still pursue. The question of whether you can recover anything when fault is shared is one of the most anxiety-producing uncertainties in the aftermath of an accident, and the answer depends significantly on which state the accident occurred in, because the rules are not uniform and the differences between them are large enough to change the outcome of your case entirely.
Missouri follows a rule called pure comparative fault, and it is one of the most plaintiff-friendly fault allocation systems in the country. Under pure comparative fault, you can recover damages even if you were more at fault for the accident than the other driver. Even if you were 90 percent responsible for what happened, you can still recover 10 percent of your total damages from the other party. The percentage of fault assigned to you reduces your recovery by that percentage, but it does not eliminate it. This is not the rule in every state. Some states use modified comparative fault, which cuts off your recovery entirely once your fault reaches 50 or 51 percent depending on the jurisdiction. Some states still use contributory negligence, a harsh older rule that bars any recovery at all if you were even one percent at fault. Missouri’s pure comparative fault standard is a meaningful legal protection, and if you are in Missouri and you have been told or have assumed that partial fault means no recovery, that assumption is wrong.
Understanding how fault is actually determined in a car accident claim is essential to understanding why the percentage assigned to you is not fixed, not certain, and not something you should accept passively from an adjuster who has a financial interest in assigning you as much of it as possible. Fault is determined through evidence: physical evidence at the scene, the police report, witness accounts, traffic camera or dashcam footage, the event data recorder from both vehicles, accident reconstruction analysis, and the testimony of the parties. None of those sources is automatically authoritative, and each of them can be challenged, supplemented, or reframed by additional evidence or expert analysis. The fault allocation that appears in a police report is one officer’s assessment based on limited information gathered under time pressure. It is not a judicial determination. It is not binding on the insurer, the claimant, or a court. It is a starting point, and starting points move.
The insurance company handling the at-fault driver’s claim has a specific incentive to assign you as much comparative fault as possible, because every percentage point of fault assigned to you is a percentage point by which your recovery is reduced, which is a percentage point of the claim they do not have to pay. This incentive is systematic, not personal, and it operates through the adjuster who calls you, through the recorded statement they ask you to give before you understand your rights, through the IME physician they retain to review your injuries, and through the accident reconstruction expert they hire to opine that your driving contributed to the collision. None of these processes are designed to arrive at a neutral assessment of what actually happened. They are designed to arrive at an assessment that favors the insurer’s financial position, and the fault allocation they produce reflects that purpose. Knowing this does not mean you should be combative or dishonest about your own conduct. It means you should not mistake their conclusion about your fault for an objective finding that binds you.
The specific ways in which your own conduct can become part of the fault picture are worth understanding concretely. If you were following too closely before the accident, that can be characterized as contributing to the severity of a rear-end collision. If you were changing lanes when struck, the lane change maneuver becomes a potential basis for assigning you partial fault. If you were speeding, even slightly, that fact will be extracted from the event data recorder and used. If you made a late or abrupt stop, that will be argued by the driver who hit you as a contributing cause. These arguments are not always legitimate, and they are often asserted without adequate factual support, but they cannot be dismissed without being specifically rebutted. The rebuttal requires evidence: the same physical documentation, witness accounts, and technical analysis that establishes the other driver’s fault. Your attorney’s job is to build that rebuttal, and the raw material for it is collected in the early days after the accident before it disappears.
There is a version of the shared fault situation that is not about percentages at all but about which driver’s conduct was the proximate cause of the accident versus a more remote contributing factor. Proximate cause in negligence law means the cause that was directly and substantially responsible for the harm that occurred. Two drivers can both behave imperfectly leading up to a collision, but the legal analysis asks which imperfect conduct was the proximate cause of the specific harm. A driver who ran a red light at speed is the proximate cause of the collision even if the other driver was technically exceeding the speed limit by five miles per hour when struck. The speeding may be a contributing factor but the proximate cause is the driver who ran the light. Proximate cause analysis is contested territory in complex accident cases, and an accident reconstructionist who can establish the specific sequence of events and their contribution to the collision is often the expert who defines how that territory is divided.
Your own insurer is a party whose position on fault allocation you also need to understand, because your own insurer’s assessment of your comparative fault affects your first-party claims in ways that are separate from the at-fault driver’s claim. If you are making a claim under your own collision coverage, your insurer may assess your fault in determining subrogation rights. If you are making an underinsured motorist claim under your own policy, your insurer steps into the position of the at-fault driver for purposes of the claim, which means they have the same incentive to assign you fault that the at-fault driver’s insurer does, even though they are your own insurance company. The conflict between your interests and your own insurer’s interests in a UIM claim is one of the more counterintuitive dynamics in personal injury practice, and it is a reason that attorney representation in UIM claims is as important as in third-party claims.
If you were found at fault to some degree in the police report or by the at-fault driver’s insurer, and you have been injured, there are specific things you should do that are different from the standard post-accident advice. First, do not make admissions about your fault to anyone beyond your attorney without considering the implications. What you say to the other driver’s adjuster, what you post about the accident, and what you say in any recorded statement becomes part of the record used to establish your fault percentage. Second, preserve every piece of evidence that bears on the conduct of both drivers, because evidence that establishes the other driver’s fault is also evidence that contextualizes yours. Third, get a thorough medical evaluation and document your injuries completely regardless of the fault question, because your damages are calculated before the fault percentage is applied, and undervalued damages combined with a fault reduction produce a compounded loss. Fourth, consult with a personal injury attorney before accepting any settlement that reflects a fault allocation you have not independently evaluated, because the percentage the insurer assigns you is the percentage they chose, not the percentage a court would necessarily find.
The scenario that surprises most people is being assigned a significant percentage of fault and discovering that recovery is still possible and still meaningful. A $300,000 damages case in which you are found 30 percent at fault produces a $210,000 recovery under Missouri’s pure comparative fault system. The same case under a contributory negligence rule produces nothing. The same case in a modified comparative fault state with a 50 percent bar produces nothing if you are found at 50 percent or above. The system you are in determines what the outcome of a given fault allocation actually means for what you take home, and the system you are in, if you are in Missouri, is among the most protective available.
Shared fault is not a closed door. It is a variable in an equation, and like every variable in a legal claim, it is subject to the quality of the evidence marshaled to define it. The insurer’s interest in maximizing your share of the fault is not the same as the legal system’s interest in accurately determining it. Knowing the difference between those two things, and understanding that the percentage being offered to you by a claims department is an opening position rather than a final verdict, is what keeps the door open long enough to find out what you are actually owed.
This article is intended for general informational purposes only and does not constitute legal advice. Comparative fault rules vary significantly by state, and the application of those rules to any specific accident depends on the facts, evidence, and applicable law in your jurisdiction. If you have been injured in an accident in which fault is disputed or shared, consult with a licensed personal injury attorney before accepting any settlement or making any admissions about your conduct.