Can You Sue for a Spinal Cord Injury if You Were Partly at Fault?

One of the most common questions injured parties ask after a spinal cord injury accident is whether they can still pursue a claim if they believe they were partly responsible for what happened. In California, the answer is almost always yes. The state's pure comparative fault doctrine means that shared responsibility reduces a plaintiff's recovery — it does not eliminate it. This article explains how that doctrine works, how fault is actually allocated in litigation, and what it means for the bottom-line value of a spinal cord injury claim.

California's Pure Comparative Fault Rule

California's comparative fault doctrine was established by the California Supreme Court in Li v. Yellow Cab Co., 13 Cal.3d 804 (1975), which expressly overruled the prior contributory negligence standard. Under the old contributory negligence rule, any fault on the plaintiff's part — even 1% — completely barred recovery. The court in Li held that this result was unjust and replaced it with a pure comparative fault system.

Under California's pure comparative fault rule:

• A plaintiff who is 10% at fault recovers 90% of their total damages.
• A plaintiff who is 50% at fault recovers 50% of their total damages.
• A plaintiff who is 80% at fault recovers 20% of their total damages.
• A plaintiff who is 99% at fault can still recover 1% of their total damages.

This is what distinguishes "pure" comparative fault from the "modified" comparative fault systems used in other states. Modified systems — used in states like Texas (51% bar) and Colorado (50% bar) — deny recovery entirely if the plaintiff's fault reaches or exceeds a threshold percentage. California has no such threshold: recovery is always proportionate, never barred by the plaintiff's fault alone.

How Fault Is Allocated in Practice

Fault allocation is a question of fact for the jury. The jury is instructed to assign a percentage of responsibility to each party — the plaintiff, each defendant, and potentially non-party tortfeasors (people or entities who contributed to the accident but were not sued). The percentages must total 100%.

California Civil Jury Instruction (CACI) 405 governs comparative fault in personal injury cases. The instruction tells the jury to consider each party's conduct in relation to the harm caused and to assign percentages based on the evidence presented at trial.

At mediation — where most California SCI cases resolve — fault allocation is negotiated rather than adjudicated. Both sides present their liability positions, and the mediator helps the parties arrive at a mutually acceptable view of fault that supports a settlement. A plaintiff's attorney who can demonstrate that the defendant bore substantial responsibility, even in cases where the plaintiff shares some blame, is in a strong negotiating position.

Defense insurers frequently open settlement negotiations by asserting high plaintiff fault percentages as a strategy to lower the offer. The strength of the plaintiff's liability evidence — not the insurer's opening argument — is what ultimately determines the realistic fault allocation at mediation or trial.

General practice observation — Spinal Injury Law editorial

Proposition 51 and Multiple Defendants

In cases involving multiple defendants — for example, a negligent driver and a negligent trucking company — California's Proposition 51 (codified at Civil Code § 1431.2, enacted by voters in 1986) creates an important distinction between economic and non-economic damages:

• Economic damages (medical bills, lost wages, future care costs): Each defendant is jointly and severally liable. This means the plaintiff can collect the full amount of economic damages from any single defendant who is at fault — even if that defendant's individual fault percentage is small. The paying defendant may then seek contribution from co-defendants.
• Non-economic damages (pain, suffering, loss of enjoyment of life): Each defendant is severally liable only for their proportionate share. If Defendant A is found 60% at fault and Defendant B is found 40% at fault, and the jury awards $1 million in non-economic damages, Defendant A pays $600,000 and Defendant B pays $400,000. The plaintiff cannot collect Defendant B's share from Defendant A.

This distinction is particularly significant in spinal cord injury cases, where non-economic damages can represent a large majority of the total award. If one defendant is insolvent or underinsured, the plaintiff may not be able to collect their full share of non-economic damages.

Pre-Existing Spinal Conditions and the Eggshell Plaintiff Rule

Many people involved in serious accidents have pre-existing spinal conditions — degenerative disc disease, prior surgeries, herniations, or stenosis — that made them more susceptible to serious injury. Defense insurers routinely attempt to attribute a portion of the plaintiff's current condition to these pre-existing conditions to reduce the damages attributable to the accident.

The eggshell plaintiff doctrine, well-established in California, directly addresses this defense. The doctrine provides that a defendant takes the plaintiff as they find them: if the plaintiff's pre-existing condition made them more vulnerable to serious injury, that does not reduce the defendant's liability for the harm the defendant actually caused. The defendant is responsible for all harm caused or aggravated by their negligence, even if a person without the pre-existing condition would have suffered a lesser injury.

The key distinction is between aggravation and pre-existing damage. If the accident aggravated a pre-existing spinal condition — converting a manageable degenerative condition into a catastrophic injury — the defendant is liable for the full aggravation. The plaintiff is not required to prove that the defendant caused a spinal condition from scratch; only that the defendant's negligence caused or accelerated the harm that actually occurred.

A pre-existing condition is different from comparative fault. Comparative fault addresses the plaintiff's own conduct contributing to the accident. The eggshell doctrine addresses the plaintiff's physical vulnerability. Both doctrines can apply in the same case, but they operate independently.

Common Fault Arguments Used Against SCI Plaintiffs

Defense counsel and insurers commonly argue that the plaintiff bears a portion of responsibility for the accident or their injuries. In spinal cord injury cases, the most frequently raised fault arguments include:

• Traffic violations: Speeding, failure to yield, running a red light, or failing to signal are the most common fault allocations in motor vehicle accident cases. Accident reconstruction experts and electronic data recorder (EDR) data are frequently used to support or counter these arguments.
• Distracted driving or walking: Cell phone records, dashcam footage, and eyewitness accounts may be introduced to argue that the plaintiff was not paying attention at the moment of impact.
• Failure to use safety equipment: Seatbelts in vehicle cases; helmets in motorcycle and bicycle cases; harnesses in fall cases. Failure to use available safety equipment can result in fault allocation to the plaintiff for the incremental harm caused by that failure.
• Assumption of risk: In recreational activities (contact sports, extreme sports, horseback riding), the defense may argue that the plaintiff assumed the inherent risks of the activity, reducing or eliminating liability. California has modified assumption of risk doctrine established in Knight v. Jewett, 3 Cal.4th 296 (1992).
• Premises liability cases — plaintiff's own knowledge of the hazard: If the plaintiff was aware of the dangerous condition and voluntarily encountered it anyway, their knowledge can be used to argue contributory negligence.

The Seatbelt Defense in Spinal Injury Cases

The seatbelt defense deserves specific attention in spinal cord injury cases because it is commonly raised and can affect the damages allocation in meaningful ways. California Vehicle Code § 27315 requires all vehicle occupants to wear seatbelts. Evidence that a plaintiff was not wearing a seatbelt at the time of a crash that caused a spinal cord injury is admissible under Evidence Code § 1151.5 to argue that the plaintiff's failure to belt increased the severity of the injury.

Critically, California's seatbelt statute does not bar recovery for an unbelted plaintiff — it only allows the jury to consider the failure as a factor in assigning comparative fault. The jury may reduce the plaintiff's non-economic damages by whatever percentage they attribute to the seatbelt failure. This determination requires expert biomechanical testimony about whether and to what extent seatbelt use would have reduced the injury.

How Fault Percentage Affects Net Recovery: The Math

Concrete numbers illustrate why the comparative fault dispute is often the most financially consequential issue in an SCI settlement negotiation. Consider a plaintiff with a complete thoracic spinal cord injury and the following damages:

• Past medical expenses: $800,000
• Future medical and care expenses: $4,200,000
• Lost earning capacity: $1,500,000
• Non-economic damages: $5,500,000
• Total damages: $12,000,000

The net recovery at various plaintiff fault percentages:

In a $12 million case, the difference between a 10% fault finding and a 25% fault finding is $1.8 million. This is why the liability dispute — not just the damages evidence — is frequently the central strategic battleground in a catastrophic SCI case. Strong liability evidence that keeps the plaintiff's fault allocation low can be worth millions in net recovery.