After a car accident, one question drives everything: who was at fault? Fault determination is the legal and insurance process of deciding which driver caused the crash — and who is responsible for paying damages. In California, an at-fault state, the driver who caused the accident is on the hook for medical bills, property damage, and lost wages. But fault is rarely handed to you. It’s decided through a review of evidence, and insurance companies don’t always get it right.
At Big Chad Law, we help California accident victims fight back when fault is disputed, miscalculated, or unfairly placed on them. Here’s exactly how the process works — and what you can do to protect yourself.
Fault determination is the process of identifying which party acted negligently and caused the accident. In legal terms, negligence means a driver failed to act with reasonable care — running a red light, speeding, texting, or driving under the influence.
California follows an at-fault insurance system. That means the driver who caused the crash is responsible for paying the other party for their losses. This is different from no-fault states, where each driver’s own insurance pays regardless of who caused the crash.
Fault can fall entirely on one driver, or it can be split between two or more parties. The outcome directly affects how much compensation you can recover — which is why getting fault right matters so much.
To prove fault, you generally need to show four things: the other driver had a duty to drive safely, they broke that duty, their actions caused the crash, and you suffered real harm as a result. This is the foundation of every car accident claim in California.
Insurance adjusters make fault decisions — but those decisions can be wrong, biased, or incomplete. Their job is to protect their company’s money, not yours. If you disagree with their finding, you have the right to challenge it with the help of a personal injury attorney.
Once you file a claim, the insurance company opens an investigation. An adjuster is assigned to review the facts, gather evidence, and reach a fault conclusion. This process typically takes days to weeks, depending on how complex the crash was.
Adjusters review the police report, photos of the scene, damage to both vehicles, medical records, and statements from both drivers. They may also check traffic laws to see if any violations occurred.
According to the National Highway Traffic Safety Administration (NHTSA), driver error is a factor in about 94% of serious crashes — which is why insurer investigations focus heavily on driver behavior.
Adjusters work for the insurance company — not for you. They may accept a police report at face value, overlook key evidence, or push you to settle before the full picture emerges. If you give a recorded statement too early, your own words can be used to shift blame onto you.
This is exactly why having legal help early makes a big difference. An attorney controls the narrative, preserves evidence, and challenges any unfair fault finding before it’s locked in.
If you’ve been in a crash, get legal help before you give any statements. Big Chad Law offers free consultations — no fee unless you win.
Strong evidence is the backbone of any fault determination. The more evidence you have, the harder it is for an insurer to pin blame on you — or downplay the other driver’s responsibility.
A police report is often the first document an insurer reviews. It includes the officer’s observations, any citations issued, and sometimes a preliminary fault opinion. While it carries weight, it is not legally binding — and errors are common.
You can request your report through the California DMV or the local law enforcement agency. If it contains mistakes, your attorney can dispute it with supporting evidence.
Independent witnesses — people with no connection to either driver — carry significant weight in a dispute. Their accounts can confirm your version of events or contradict a false story. Get contact information from witnesses at the scene whenever possible.
Scene photos, dashcam footage, traffic camera recordings, skid marks, and vehicle damage patterns all help reconstruct what happened. In serious cases, attorneys work with accident reconstruction experts who use physics and engineering to build a precise picture of the crash.
If the other driver received a citation — for running a red light, speeding, or failing to yield — that is powerful evidence of fault. A traffic conviction related to the crash can be used directly in your personal injury claim to prove liability.
California uses a rule called pure comparative negligence. This means fault can be shared between drivers, and your payout is reduced by whatever percentage of fault is assigned to you.
For example: if your total damages are $80,000 and you are found 25% at fault, you can still recover $60,000. Unlike some states that block recovery if you are more than 50% at fault, California lets you recover even if you are 99% at fault — though your payout drops the higher your fault percentage goes.
This makes fault percentage battles very important. Even a small shift — from 30% down to 10% — can mean tens of thousands of dollars more in your pocket.
Insurers know comparative negligence rules well. They use them to push your fault percentage up so they pay less. An experienced attorney pushes back — arguing the evidence, disputing estimates, and fighting for the outcome you deserve.
Our California car accident lawyers understand exactly how fault percentages are negotiated and how to fight for the best result.
Fault is not always obvious — but certain crash types follow clear patterns. Here’s how fault is typically assigned:
Even in cases that look straightforward, insurers may dispute fault. Our personal injury team investigates every detail to build the strongest case possible.
A disputed fault claim doesn’t mean you’re out of options — it means you need a stronger strategy. Here’s what to do:
Fault disputes can drag on — but the right legal team resolves them faster and with better outcomes than going it alone.
Insurance companies have entire teams working to minimize what they pay you. Big Chad Law fights back — aggressively, and at no cost unless you win. Contact us today for a free consultation.
Fault is determined using evidence like police reports, witness statements, photos, and traffic camera footage. California is an at-fault state, so the driver who caused the crash is responsible for paying damages. Insurance companies review all available evidence and may use accident reconstruction experts in complex cases. A personal injury attorney can help ensure fault is assessed fairly.
A police report is an important piece of evidence, but it does not legally determine fault on its own. Insurance companies and courts review it along with other evidence. If the report is inaccurate, an attorney can challenge it using witness statements, photos, and independent investigation. Never assume the police report tells the full story.
If drivers dispute fault, each insurance company will investigate the accident and may reach a different conclusion. You may need to go through arbitration or file a lawsuit to resolve the dispute. An experienced personal injury attorney gathers evidence, works with accident reconstruction experts, and builds a strong case to prove the other driver was at fault.
Yes. Under California’s pure comparative negligence rule, you can recover compensation even if you were partly at fault. The court reduces your award by your percentage of fault. For example, if you are 30% at fault and your damages total $100,000, you can still recover $70,000. A lawyer helps minimize your fault percentage to maximize your payout.
Big Chad is a personal injury attorney and founder of Big Chad Law, a California-based firm known for aggressive representation and a focus on client results. With deep experience handling serious car accident claims across Los Angeles and statewide California, Chad fights insurance companies that try to underpay or misdirect fault. He offers free consultations and works on a contingency basis — you pay nothing unless he wins your case.