How Do Insurance Adjusters Determine Who is At Fault in a Car Accident?

How Do Insurance Adjusters Determine Who is At Fault in a Car Accident?

After a car crash, one of the most pressing questions is, "Who was at fault?" The answer to this question is central to any personal injury claim. Insurance adjusters are the individuals who investigate the collision to determine who is at fault in a car accident, but their process is often misunderstood. Adjusters gather and analyze various forms of evidence, apply state laws, and ultimately decide which driver—and which insurance policy—is responsible for covering the damages. 

A personal injury lawyer conducts their own investigation, however, and their analysis of the evidence often leads to a much different conclusion—one designed to protect your rights, not the insurance company's bottom line.


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Key Takeaways about How Insurance Adjusters Determine Fault in a Car Accident

  • An insurance adjuster's primary role is to investigate a car accident claim to determine liability on behalf of their employer, the insurance company.
  • The determination of fault is based on the legal concept of negligence, which means one party failed to act with reasonable care, causing the accident and subsequent injuries.
  • Adjusters analyze several key pieces of evidence, including the official police report, statements from all involved parties and witnesses, and physical evidence like vehicle damage and photos from the scene.
  • California operates under a "pure comparative negligence" system, meaning a person can still recover damages even if they are partially at fault, though their compensation will be reduced by their percentage of fault.
  • The findings of an insurance adjuster are not final; an experienced personal injury attorney can conduct an independent investigation to challenge an unfair fault determination.

The Role of the Insurance Adjuster in a Bakersfield Collision

When you report a car accident, the insurance company assigns an "adjuster" or "claims representative" to your case. Their job is to investigate the incident and decide how much, if anything, the insurance company should pay. While they may seem friendly and helpful, it’s important to remember their primary duty is to their employer. Their goal is to resolve the claim for the lowest possible amount, which often involves finding ways to place some or all of the blame on you.

This process revolves around the legal concept of liability, which is just a formal way of saying legal responsibility. To establish liability, the adjuster must find that one party was negligent. Negligence occurs when a person fails to use the same level of care that a reasonably careful person would in a similar situation, and this failure causes harm to someone else. For example, a driver who runs a red light on Coffee Road and causes a crash would likely be considered negligent.

Insurance professional selecting a digital car insurance icon, representing how insurance adjusters assess fault after a car accident in Bakersfield.

The Core Principle: Understanding Negligence in California

To determine who is at fault in a car accident, adjusters look for evidence of negligence. In California, proving negligence generally requires showing four things:

  1. Duty: The other driver had a legal duty to operate their vehicle with reasonable care to avoid harming others. Everyone on the road shares this duty.
  2. Breach: The driver "breached" or violated that duty through a specific action or inaction, like speeding, texting while driving, or failing to yield.
  3. Causation: The driver's breach of duty was the direct cause of the accident and your injuries.
  4. Damages: You suffered actual harm, such as medical bills, lost wages, and pain and suffering, as a result.

California also follows a legal rule called pure comparative negligence. This rule means that you can still be awarded compensation for your injuries even if you were partially to blame for the accident. However, your total compensation will be reduced by your percentage of fault. 

For instance, if an adjuster determines you were 20% at fault for a collision and your total damages are $100,000, you would be eligible to receive $80,000. Insurance adjusters are well aware of this rule and may try to assign you a higher percentage of fault to reduce the amount their company has to pay.

What Evidence Do Adjusters Use to Determine Who is At Fault in a Car Accident?

Insurance adjusters don't just guess who was at fault. They act as investigators, collecting and piecing together evidence to create a picture of what happened. A skilled adjuster will use multiple sources of information to make a liability decision.

The Official Police Report

One of the first documents an adjuster will request is the police report filed by the Bakersfield Police Department or the California Highway Patrol. This report is a critical piece of evidence because it is an official, third-party account of the incident.

  • Officer's Narrative: The report includes the responding officer’s summary of the accident, often based on their observations at the scene and initial statements from drivers and witnesses.
  • Citations Issued: If one driver received a traffic ticket for a violation like speeding or an illegal lane change, it serves as strong evidence of fault.
  • Accident Diagram: The officer will usually draw a diagram of the accident scene, showing the position of the vehicles, points of impact, and other relevant details.

While the police report is highly influential, the officer's opinion on fault is not the final word. An adjuster will consider it alongside all other available evidence.

Statements from Drivers and Witnesses

What you and the other driver say happened matters a great deal. An adjuster will want to hear each driver’s side of the story. They will almost certainly ask you for a recorded statement. It is often wise to be cautious when providing a statement to the other driver’s insurance company, as they may try to use your words against you later. They are trained to ask questions designed to elicit responses that can be interpreted as an admission of fault.

Independent witness statements can be extremely valuable. A witness has no financial stake in the outcome and can provide an unbiased account of events. If someone saw the crash, their testimony about which driver had the green light or who swerved into the other lane can help clarify who was responsible.

Physical Evidence from the Scene

The physical evidence left at a crash site can tell a story that words cannot. Adjusters rely heavily on tangible proof to reconstruct the accident.

  • Photographs and Videos: Pictures of the vehicle damage, skid marks on the pavement, debris in the road, and the overall scene are powerful tools. Photos can show the force of the impact and the angle of the collision.
  • Road and Weather Conditions: Was the sun in a driver's eyes? Was the road wet from rain? Were there potholes or unclear lane markings on a stretch of the Westside Parkway? These factors can contribute to an accident and may be considered.
  • Local Camera Footage: Sometimes, traffic cameras, security cameras from nearby businesses, or even a bystander’s cell phone may have captured the accident. This footage can provide indisputable proof of what occurred.

Gathering this evidence quickly is important, as it can disappear over time. Skid marks fade, and businesses may overwrite their security footage.

Vehicle Damage Analysis

The location and severity of the damage to the vehicles involved can offer clear clues about how the accident happened. For example, in a classic rear-end collision, the car that did the rear-ending is almost always found to be at fault. Damage to the front of one car and the rear of another is a clear indicator. 

Similarly, T-bone accidents, where the front of one vehicle hits the side of another, often point to a failure to yield the right-of-way at an intersection. Experts can analyze the crush damage to estimate the speed of the vehicles at impact.

Traffic Laws and the California Vehicle Code

Ultimately, fault is determined by who violated a traffic law, or a "rule of the road." Adjusters are very familiar with the California Vehicle Code and will apply its statutes to the facts of the case. Common violations that lead to a finding of fault include:

  • Failing to yield the right-of-way
  • Making an unsafe lane change
  • Following too closely (tailgating)
  • Driving above the speed limit
  • Disregarding traffic signals or signs

For example, if an accident happens because one driver made a left turn in front of an oncoming vehicle that had the right-of-way, the adjuster will likely place 100% of the fault on the turning driver, as this is a clear violation of traffic laws.

Common Challenges and Pitfalls in Fault Determination

The process to determine who is at fault in a car accident is not always straightforward. Insurance companies may use certain tactics to minimize their payout, and some accident scenarios are inherently complex.

An adjuster for the other driver might call you soon after the accident. They may sound concerned and supportive, but their objective is to get information that helps their case. Be aware of these common tactics:

  • Offering a Quick, Low Settlement: They may offer a small amount of money right away to get you to sign a release, which prevents you from seeking further compensation, even if your injuries turn out to be more serious than you first thought.
  • Asking for a Recorded Statement: They will try to get you on record. They may ask leading questions or try to get you to speculate about what happened. A simple "I'm not sure" can be twisted to mean you don't remember, casting doubt on your entire account.
  • Shifting the Blame: They will look for any opportunity to apply California’s comparative negligence rule. They might ask, "Were you in a hurry?" or "Were you listening to the radio?" to suggest you were distracted and partially responsible.

These tactics are designed to save the insurance company money by either denying the claim or reducing the amount they have to pay.

How a Bakersfield Car Accident Lawyer Can Help

When an insurance company's investigation is focused on protecting its own interests, having someone on your side who is focused on protecting yours can make all the difference. An experienced car accident lawyer challenges the insurance company's narrative by conducting a separate and thorough investigation. Their goal is to gather the evidence needed to show exactly what happened and who is truly responsible for your injuries.

An attorney can assist by:

  1. Conducting an Independent Investigation: They can go to the accident scene, take their own photographs, measure skid marks, and talk to witnesses the police may have missed.
  2. Gathering and Preserving Crucial Evidence: They can send formal preservation letters to secure evidence like surveillance footage or trucking company logs before it is destroyed.
  3. Handling All Communications: A lawyer will take over all conversations and correspondence with the insurance adjusters. This protects you from saying something that could be misinterpreted and allows you to focus on your recovery.
  4. Hiring Accident Reconstruction Professionals: In complex cases, such as those involving major collisions on Highway 99, an attorney can bring in engineers and other professionals to analyze the evidence and provide a scientific opinion on how the crash occurred.
  5. Building a Strong Case: They will compile all the evidence—the police report, witness statements, medical records, and expert opinions—into a persuasive argument that clearly demonstrates the other party’s fault and the full extent of your damages.

By presenting a well-documented and compelling case, a lawyer can counter an unfair fault determination and fight for the full compensation you need to cover your medical bills, lost income, and other losses. An attorney works to hold negligent drivers accountable for the harm they cause.

Illustration of a car resting in a person’s hand, symbolizing how insurance adjusters determine fault in a Bakersfield car accident claim.

Determining Who is At Fault in a Car Accident FAQs

What if I think I was partially at fault for the accident?

You should never admit fault at the scene of the accident or to an insurance adjuster. California's pure comparative negligence rule means you may still be able to recover compensation even if you were partly to blame. It is the adjuster's job to investigate and assign percentages of fault, and an attorney can help ensure that the assessment is fair and based on the evidence.

Should I talk to the other driver's insurance adjuster?

It is generally best to be very careful when speaking with the other party's insurance company. You are not legally required to provide them with a recorded statement. You can politely decline and state that you will have your attorney contact them. Their goal is to find reasons to deny or devalue your claim, and anything you say can be used to assign you a greater share of fault.

How long does it take for an insurance adjuster to determine fault?

The timeline can vary greatly depending on the complexity of the accident. For a simple rear-end collision where liability is clear, an adjuster might make a determination in a week or two. For more complicated cases involving serious injuries or conflicting evidence, the investigation could take several weeks or even months.

What happens if the police report says I was at fault, but I disagree?

A police report is an important piece of evidence, but it is not the final word on liability. The officer's conclusion is their opinion based on the evidence available at the scene. If there is other evidence that contradicts the report, such as a credible witness or video footage, an attorney can use it to challenge the officer's finding and argue for a different outcome with the insurance company.

Can an insurance company change its mind about who is at fault?

Yes, an insurance company can change its liability decision if new, compelling evidence comes to light. For example, if an adjuster initially accepts liability but later discovers a key witness who provides a different account of the accident, they may re-evaluate their position. This is why having a thorough, independent investigation done on your behalf is so important.

Contact the Law Offices of Mickey Fine

A tiny blue car stands before a judge, who holds a gavel in hand.


Determining who is at fault in a car accident is a complex process, and the stakes are high. An unfair decision can leave you with unpaid medical bills and financial stress. You do not have to go through this process on your own. At the Law Offices of Mickey Fine, we are committed to standing up for the rights of injured people in Bakersfield and throughout Kern County.

With more than 30 years of experience, Mickey Fine knows how to build a strong case and hold negligent parties accountable. We will personally oversee every aspect of your case and fight for the full and fair compensation you deserve. It costs nothing to see if we can help. Contact us today for a free, no-obligation consultation to discuss your case.


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