Arizona Car Accident Laws: Fault + Deadlines

Arizona car accident law determines who pays, how much they pay, and how long you have to pursue a claim. These aren’t abstract legal concepts. They’re the rules that control whether an injured person gets compensated or walks away with nothing.

This guide covers the statutes that apply to every car crash case in Arizona. Each section cites the specific Arizona Revised Statute so you can verify the law yourself.

Arizona Follows Pure Comparative Negligence

Arizona Revised Statutes Section 12-2505 establishes pure comparative negligence as the state’s fault system. This is the single most important statute in any Arizona car crash case.

Under pure comparative negligence, a plaintiff’s recovery is reduced by their percentage of fault, but it’s never eliminated entirely. If a jury finds you 30% at fault and the other driver 70% at fault, you recover 70% of your total damages. If you’re 80% at fault and the other driver is 20% at fault, you still recover 20%.

That last part surprises most people. In many states, being more than 50% or 51% at fault bars recovery completely. Arizona doesn’t work that way. Even at 99% fault, you’re entitled to 1% of your proven damages.

ARS 12-2505(A) states it plainly: “The defense of contributory negligence or of assumption of risk is in all cases a question of fact and shall at all times be left to the jury.” The statute removed the old common-law rule that any contributory negligence by the plaintiff destroyed the entire claim.

How Fault Is Determined

Fault in Arizona car crash cases comes down to the legal standard of negligence. A driver is negligent when they fail to exercise reasonable care and that failure causes injury.

Arizona courts look at several categories of evidence to assign fault percentages. The police report and any traffic citations are the first two pieces. The responding officer’s crash report typically includes a fault determination or at least a contributing factors section. It’s not binding on a jury, but the officer’s assessment carries significant weight in settlement negotiations.

If the other driver received a citation for running a red light, speeding, or distracted driving, that citation is strong evidence of negligence. Arizona law treats certain traffic violations as negligence per se, meaning the violation itself establishes the duty-and-breach elements of negligence.

Physical evidence fills in the rest of the picture. Skid marks, vehicle damage patterns, debris fields, and final rest positions all help reconstruct what happened. Accident reconstructionists use this data to calculate speeds, angles of impact, and reaction times.

Witness testimony layers on top. Passengers, other drivers, and pedestrians who saw the crash can testify about what they observed, and consistent statements given shortly after the crash are more persuasive than memories reconstructed months later.

Both sides will present evidence supporting their fault allocation. The jury weighs all of it and assigns percentages. Those percentages directly control the dollar amount of the verdict.

Minimum Insurance Requirements in Arizona

Arizona Revised Statutes Title 28, Chapter 9 establishes mandatory liability insurance for all registered vehicles. The minimum coverage amounts are:

• $25,000 per person for bodily injury
• $50,000 per crash for bodily injury (when multiple people are injured)
• $15,000 per crash for property damage

These are referred to as 25/50/15 minimums. Every driver in Arizona must carry at least this much coverage or face penalties including license suspension, vehicle registration revocation, and fines.

Here’s the problem: $25,000 doesn’t cover much. A single ER visit with imaging can run $10,000 to $15,000. A surgery pushes medical bills past $25,000 easily. If the at-fault driver carries only the state minimum and the injured person’s medical bills exceed $25,000, the insurance policy maxes out. The remaining balance either comes from the injured person’s own coverage or goes unpaid.

Arizona doesn’t require drivers to carry uninsured or underinsured motorist coverage. That’s a gap in the law that hurts injured people every day.

Uninsured and Underinsured Motorist Coverage

While not legally required, uninsured motorist (UM) and underinsured motorist (UIM) coverage is available from every insurance carrier in Arizona. Under ARS 20-259.01, insurance companies must offer UM/UIM coverage to every policyholder. The policyholder can reject it in writing, but the carrier has to make the offer.

UM coverage applies when the at-fault driver has no insurance at all. ADOT estimates that roughly 12% of Arizona drivers are uninsured, one of the higher rates in the country.

UIM coverage applies when the at-fault driver’s insurance isn’t enough to cover the injured person’s damages. If the at-fault driver has a $25,000 policy and the injured person’s damages total $150,000, UIM coverage from the injured person’s own policy can fill the gap, up to the UIM policy limit.

If a crash involves a hit-and-run driver who’s never identified, UM coverage is typically the only available source of compensation. Arizona treats hit-and-run crashes as uninsured motorist events for coverage purposes.

The Two-Year Statute of Limitations

Arizona Revised Statutes Section 12-542 sets a two-year statute of limitations for personal injury claims. The clock starts on the date of the crash. If the injured person doesn’t file a lawsuit within two years, the claim is barred.

Two years sounds like a long time. It isn’t. Medical treatment often takes months. Some injuries don’t stabilize for a year or more. Insurance negotiations can drag on. And preparation for litigation, including medical records collection, expert retention, and demand package assembly, takes time.

Filing the lawsuit means actually filing a complaint in court. Sending a demand letter to the insurance company doesn’t satisfy the statute. Starting negotiations doesn’t satisfy the statute. Only a filed complaint stops the clock.

If the crash caused property damage only (no personal injuries), the statute of limitations is also two years under ARS 12-542. Wrongful death claims have a separate two-year limitation under ARS 12-611, starting from the date of death, which may be different from the date of the crash.

Medical Treatment and the Discovery Rule

Arizona recognizes a limited discovery rule that can extend the statute of limitations in specific circumstances. Under the discovery rule, the clock doesn’t start until the injured person knew or reasonably should have known about the injury and its cause.

For most car crash cases, the discovery rule doesn’t change anything. You know you were in a crash. You know you’re injured. The clock starts on the crash date.

But in rare cases, an injury isn’t apparent until later. A person involved in a seemingly minor rear-end collision might not discover a herniated disc until an MRI six months later. If the injury couldn’t have been discovered earlier through reasonable diligence, the discovery rule might extend the filing deadline.

Courts apply this rule narrowly. It doesn’t excuse someone who simply waited too long to see a doctor. The standard is whether a reasonable person in the same situation would have discovered the injury sooner.

Government Entities and the 180-Day Notice of Claim

If the crash involves a government entity, a completely different set of rules applies. Arizona Revised Statutes Section 12-821.01 requires anyone filing a claim against a public entity or public employee to serve a formal notice of claim within 180 days of the incident.

That’s 180 calendar days. Not six months. Not 180 business days. Calendar days from the date of the crash.

This applies to crashes involving city vehicles, county vehicles, state vehicles, school buses, public transit, and any government-owned or government-operated vehicle. It also applies when road design, signage, or maintenance contributed to the crash, because the responsible government agency may be liable.

The notice of claim must include specific information under the statute. It identifies the claimant, describes the injury, states the facts supporting the claim, identifies the public entity or employee, and specifies the amount claimed. A vague or incomplete notice can be rejected.

The notice must be served on the right entity. A claim against a city goes to the city clerk. A claim against ADOT goes to the attorney general’s office. Serving the wrong entity doesn’t satisfy the requirement.

If the 180-day notice isn’t served, the claim is barred. Period. Courts have consistently enforced this deadline without exception. It doesn’t matter how severe the injuries are or how clear the government’s fault is. Miss the notice of claim deadline and the case is over before it starts.

Bad Faith Insurance Claims

Arizona Revised Statutes Section 20-461 defines unfair claim settlement practices by insurance companies. When an insurer unreasonably denies, delays, or undervalues a valid claim, the policyholder or claimant may have a bad faith claim separate from the underlying injury claim.

Bad faith isn’t just a disagreement about how much a claim is worth. It’s a pattern of conduct where the insurer fails to meet its legal obligations. Arizona courts have identified several categories of bad faith conduct.

Unreasonable delay is the pattern we see most often. Taking months to investigate a straightforward claim, or requiring excessive documentation for simple requests, can constitute bad faith when there’s no legitimate justification for the slow-walk. Insurers know that injured people have bills piling up and often settle cheap when the delay gets painful enough. That’s the strategy, and it’s actionable.

Lowball offers fall into the same category. Offering an amount the insurer knows is well below the claim’s reasonable value, hoping the claimant will accept out of financial desperation, is a recognized bad faith practice under Arizona law.

The remedy for bad faith can exceed the original claim amount. Arizona allows consequential damages (financial harm caused by the bad faith conduct itself) and, in egregious cases, punitive damages. A $50,000 injury claim that’s handled in bad faith can produce a verdict in the hundreds of thousands.

The Insurance Company’s First Call

Within days of a crash, the at-fault driver’s insurance company will contact the injured person. Sometimes it happens within hours. The adjuster will be polite and professional. They’ll express concern about the injured person’s wellbeing. They’ll ask questions.

Every word of that conversation serves one purpose: reducing the insurance company’s payout.

The adjuster may ask for a recorded statement. You’re not required to give one to the other driver’s insurer. Arizona law doesn’t compel it. The adjuster might imply it’s required or that the claim can’t proceed without it. That’s not accurate.

The adjuster may ask about your medical history. They’re looking for pre-existing conditions they can use to argue that your injuries aren’t from the crash. A prior back injury from five years ago becomes “your current symptoms are related to your pre-existing condition, not the crash.”

The adjuster may offer a quick settlement. It’ll sound reasonable until you realize it doesn’t account for future medical treatment, lost earning capacity, or the full scope of your pain and suffering. Once you sign a release and accept a settlement, you can’t go back and ask for more. The case is closed.

Your own insurance company is a different situation. Your policy likely includes a cooperation clause requiring you to report the crash and cooperate with their investigation. But even with your own insurer, it’s wise to have an attorney involved before giving detailed statements about injuries or accepting any settlement offer.

Wrongful Death from a Car Crash

Arizona Revised Statutes Sections 12-611 through 12-613 govern wrongful death claims. When a car crash kills someone, the surviving family members have the right to file a civil lawsuit for damages.

ARS 12-612 identifies who can bring a wrongful death claim.

The surviving spouse and children (or legal guardian on behalf of minor children) have first priority. If there’s no surviving spouse or children, the claim passes to the deceased person’s parents. If there are no surviving parents, the personal representative of the estate can bring the claim on behalf of the estate’s beneficiaries.

Wrongful death damages in Arizona fall into four categories. The biggest in most cases is loss of the deceased person’s expected income, calculated based on earning history, age, health, and life expectancy. Economists project future earnings and reduce them to present value. For a 40-year-old primary earner, that number can run into the millions before any other category gets added.

The next category is non-economic: loss of companionship, guidance, and consortium. A spouse loses a partner. Children lose a parent’s guidance. These damages are real, and Arizona juries award substantial amounts for them because they reflect the actual shape of the loss.

There’s no statutory cap. Arizona voters rejected damages caps constitutionally, and Maricopa County Superior Court judges won’t reduce a jury award for this category unless it clearly exceeds the evidence.

The statute of limitations for wrongful death is two years from the date of death under ARS 12-611. If the injured person survived for weeks or months after the crash before dying, the wrongful death clock starts at the date of death, not the date of the crash. But the personal injury statute of limitations for the survival claim may still run from the crash date. This timing distinction can be critical.

If the at-fault driver was working at the time of the crash, the employer may also be liable under the doctrine of respondeat superior. If the crash involved a commercial truck, a government vehicle, or a rideshare driver, additional parties and additional insurance policies may apply. Multi-defendant wrongful death cases are common and significantly increase the potential recovery.

Damages Available in Arizona Car Crash Cases

Arizona law allows two broad categories of damages in personal injury cases: economic and non-economic.

Economic damages include medical bills (past and future), lost wages, lost earning capacity, property damage, and out-of-pocket expenses related to the injury. These are calculated from documentation: bills, pay stubs, tax returns, and expert projections.

Non-economic damages include pain and suffering, loss of enjoyment of life, emotional distress, disfigurement, and loss of consortium (the impact on a spouse’s relationship). Arizona doesn’t cap non-economic damages in personal injury cases. There’s no statutory maximum. The jury decides the amount based on the evidence.

Arizona doesn’t allow punitive damages in most car crash cases. Punitive damages require proof of something beyond ordinary negligence, typically an “evil mind” or conscious disregard for others’ safety. A drunk driving crash with a BAC well over the legal limit might support punitive damages. A routine lane-change crash won’t.

When to Contact an Attorney

Not every car crash requires a lawyer. If the damage is minor, nobody’s injured, and the insurance claim settles fairly, an attorney may not add value.

But certain situations demand legal representation from the start.

Any crash involving serious injuries, hospitalization, or surgery. Any crash where fault is disputed. Any crash involving a commercial vehicle or government entity. Any crash where the at-fault driver is uninsured or underinsured. Any crash that resulted in a fatality. And any situation where the insurance company is delaying, lowballing, or denying a claim.

Arizona personal injury attorneys typically work on contingency, meaning no fee unless they recover money for the client. The standard contingency rate in Arizona ranges from 33% to 40%, depending on whether the case settles or goes to trial.

AZ Law Now takes intake by phone at (602) 654-0202 or through the contact form. The initial call is to understand what happened, identify the applicable rules, and explain the options.