Arizona Citizen's Guide to Auto Crash Insurance Calculations
This guide explains how an Arizona citizen should analyze a serious crash: identify the at-fault liability stack, separate bodily-injury and wrongful-death claims from property claims, measure the effect of Arizona's 25/50/15 minimum floor, apply Arizona's comparative-fault and several-liability structure, and then determine what uninsured, underinsured, rideshare, employer, household-exclusion, or umbrella coverages may change the real calculation.
On this page
- Arizona crash-calculation frame
- Coverage cues that matter immediately
- Coverage ladder: minimum through commercial
- Post-crash calculation roadmap
- Scenario 1: multi-fatality minimum-limits matrix
- Minimum-limits equal-share illustration
- Property damage, bicycles, pets, and gear
- Arizona UM/UIM structure
- Pedestrians and bicyclists
- Higher tiers, umbrella, work use, and TNC coverage
- Why disclosure still matters in Arizona
- Authorities and links
Arizona crash-calculation frame
Arizona's ordinary personal-auto floor is 25/50/15: twenty-five thousand dollars for bodily injury or death to one person, fifty thousand dollars for bodily injury or death to two or more persons in one accident, and fifteen thousand dollars for property damage in one accident. Arizona is an at-fault state, not a no-fault state. There is no Utah-style PIP threshold system standing between the crash and a liability claim.
Arizona also requires insurers to make UM and UIM available and to offer them by written notice up to the policy's bodily-injury liability limits. But that does not mean every Arizona household kept them. In Arizona, the declarations page is often the first real proof of whether the injured household has a meaningful backstop against an uninsured or underinsured driver.
Minimum liability
25k bodily injury to one person, 50k bodily injury per accident, 15k property damage.
UM offered
Insurers must make UM available and offer it by written notice up to the policy's bodily-injury liability limits.
UIM offered
Insurers must also make UIM available and offer it by written notice up to the policy's bodily-injury liability limits.
Several liability
Arizona generally allocates liability in direct proportion to each actor's percentage of fault rather than imposing broad joint-and-several liability.
Coverage cues that matter immediately after a crash
| Coverage item | Arizona cue | Why it matters |
|---|---|---|
| Liability BI | 25/50 minimum | All third-party human bodily-injury and wrongful-death claims start here unless higher limits, umbrella, employer, rideshare, or commercial coverage exists. |
| Property damage | 15k minimum | Vehicle destruction, bicycles, child seats, electronics, and other property claims compete inside one small property-damage coverage. |
| UM / UIM | Must be offered up to BI liability limits | The at-fault stack may be small, but the victim household may have a separate first-party backstop if it kept UM/UIM. |
| Household exclusion | Arizona permits insurers to limit family-member bodily-injury claims to the state minimum even when higher limits were purchased | Family passengers may not stand in the same coverage position as strangers in the other car. |
| Comparative fault | Arizona reduces damages proportionately and generally assigns several-only liability | Claim value depends not only on damages, but on percentage allocations across claimants, defendants, and nonparties at fault. |
| No PIP threshold | Arizona is not a no-fault state | The liability case is not filtered through a Utah-style medical-expense threshold before general damages can begin. |
Coverage ladder: minimum through commercial
| Tier | Typical stack | What the citizen should assume |
|---|---|---|
| Tier 0 | Uninsured / no liability policy | No liability coverage exists. The victim household must look to UM, UIM if relevant, health coverage, direct claims against the driver or estate, and any employer or owner theories. |
| Tier 1 | Arizona minimum PPA: 25/50/15 | This is the legal floor for current ordinary personal auto coverage. In a multi-death or major-trauma crash it is usually catastrophic and quickly exhausted. |
| Tier 2 | Common mid PPA: 50/100/25 or 50/100/50 | Still thin in a catastrophic case, but materially better than the floor. |
| Tier 3 | Common higher PPA: 100/300/100 or 100/300/300 | Often the first household-protection package that meaningfully changes settlement posture. |
| Tier 4 | High PPA plus umbrella | Primary auto may be followed by umbrella or excess layers. Identifying all declarations pages matters. |
| Tier 5 | Commercial auto / employer fleet / TNC stack | The whole claim changes if business use, employer coverage, or transportation-network coverage applies. |
Post-crash calculation roadmap
| Step | Question | Practical consequence |
|---|---|---|
| 1 | Who is claiming? | Separate the at-fault driver, family passengers, other vehicle occupants, pedestrians, bicyclists, and each item of damaged property. They do not stand in the same coverage position. |
| 2 | What kind of claim is it? | Human death or bodily injury goes to bodily-injury / wrongful-death analysis. Vehicle loss, bicycles, pets, electronics, and gear go to property-damage analysis unless separate first-party coverage applies. |
| 3 | What is the at-fault stack? | Identify personal auto, umbrella, employer, permissive-use, rideshare, commercial, or governmental layers before assuming the case is only minimum-limits. |
| 4 | Does a household exclusion change the result? | Arizona consumer guidance warns that some policies limit family-member bodily-injury coverage to the state minimum even where higher liability limits were purchased. |
| 5 | What does the victim household carry? | Read the declarations page for UM, UIM, collision, comprehensive, rental, and any medical-payments coverage. Arizona does not guarantee a first-party rescue unless the household bought it. |
| 6 | How is fault allocated? | Arizona generally allocates damages in direct proportion to each defendant's percentage of fault and considers nonparties at fault as part of the apportionment exercise. |
| 7 | Is wrongful death involved? | Wrongful-death actions may be brought by statutory survivors or the personal representative for those survivors. |
Scenario 1: multi-fatality minimum-limits matrix
Hypothetical catastrophe: a drunk driver, traveling with a spouse, infant child, and family dog, crashes into another passenger car carrying two adults, one child, and that family's bicycle rack and gear. All humans are killed. These tables are educational illustrations, not litigation predictions.
| Claimant group | Claim type | Primary coverage to examine | Main threshold issue | Citizen takeaway |
|---|---|---|---|---|
| At-fault driver | Own bodily injury / death | Not a third-party liability claim against the driver's own liability policy | Liability insurance is not first-party death coverage for the at-fault driver. | Look to life insurance, health coverage, MedPay if purchased, or estate planning—not liability. |
| At-fault driver's spouse | Wrongful death / bodily injury claim against driver or estate | Possible liability claim inside the bodily-injury coverage | At minimum limits, the entire policy is already at the legal floor. On higher-limit policies, a household exclusion may still reduce the available family-member bodily-injury coverage back down to the state minimum. | Family passengers do not necessarily occupy the same coverage position as strangers in the other vehicle. |
| At-fault driver's child | Wrongful death / bodily injury claim against driver or estate | Same bodily-injury coverage | No separate child coverage category exists. | Children compete inside the same aggregate as adults. |
| Other car: adult 1 | Wrongful death | Classic third-party bodily-injury / wrongful-death claim | Competes with every other covered human claimant in the 50k accident aggregate. | The per-accident aggregate can matter more than the 25k per-person figure. |
| Other car: adult 2 | Wrongful death | Same bodily-injury coverage | Same aggregate competition | Clear fault still leaves a very small shared coverage. |
| Other car: child | Wrongful death | Same bodily-injury coverage | Same aggregate competition | No separate child lane exists inside liability coverage. |
Property damage, bicycles, pets, and gear
| Item or loss | Usual coverage lane | What changes the analysis |
|---|---|---|
| Other family's vehicle | 15k property-damage coverage | Collision coverage on the victim side may pay first, but the PD limit still matters for reimbursement and total-loss pressure. |
| At-fault vehicle | Usually not a third-party property-damage claim against the at-fault driver's own liability policy | Look to collision or other first-party property coverages, not liability. |
| Bicycles, racks, helmets, child seats, electronics, luggage | 15k property-damage coverage | These items compete with the vehicle loss unless other first-party property coverage exists. |
| Pets | Property / economic-damage analysis, not wrongful-death analysis | The page should treat pets as property-damage items unless some other policy language changes the first-party side. |
| Property owned by, rented to, in charge of, or transported by the insured | May be excluded from liability coverage | Arizona's financial-responsibility statute permits those exclusions. |
Arizona UM/UIM structure
Arizona does not mandate that every household keep UM or UIM, but it does require insurers to offer both by written notice up to the policy's bodily-injury liability limits. The policy declarations page is treated by statute as the final expression of the named insured's decision to purchase, lower, or reject the coverage.
Arizona's statute also states that UIM applies when the sum of all applicable bodily-injury liability limits is less than the injured person's total damages, and that UIM is applicable to the difference between those total damages and the total applicable liability limits. Arizona also allows policy language to limit multiple policies or coverages purchased by one insured on different vehicles so that only one policy or coverage, selected by the insured, applies to a single accident.
| Your own coverage position | What happens after a severe crash | Citizen takeaway |
|---|---|---|
| UM/UIM kept at full BI limits | Your household may have a strong first-party backstop when the at-fault driver carries too little or no meaningful liability insurance. | Arizona's offer statute matters only if the household actually kept the protection. |
| UM/UIM rejected in whole or in part | Your own first-party backstop may be missing or materially smaller than your liability limits. | The declarations page matters immediately after the crash. |
| Multiple policies or vehicles | Arizona allows the insurer to limit multiple coverages so that only one policy or coverage selected by the insured applies to one accident. | Do not assume easy stacking just because multiple premiums were paid. |
| Uninsured or phantom-vehicle scenario | UM may become the main bodily-injury recovery source if it was retained. | A claimant with weak UM protection may discover that the legal minimum system offers no meaningful substitute. |
| Underinsured scenario | UIM may apply only to the gap between total damages and total applicable liability limits. | The claimant must know both the at-fault stack and the victim household's actual UIM election. |
Pedestrians and bicyclists
| Victim type | Human injury or death coverage | Property coverage | What changes the analysis |
|---|---|---|---|
| Pedestrian adult | Third-party bodily-injury / wrongful-death claim | Clothing, carried items, devices | Competes with all other human BI claimants in the same accident aggregate. |
| Pedestrian child | Third-party bodily-injury / wrongful-death claim | Stroller or carried items | No separate child coverage category exists. |
| Bicyclist adult | Third-party bodily-injury / wrongful-death claim | Bicycle, helmet, electronics, rack or cargo | The rider's bodily injury is a BI claim; the bicycle and gear are property-damage claims. |
| Bicyclist child | Third-party bodily-injury / wrongful-death claim | Bicycle and gear | The bodily-injury and property claims still sit in different coverage lanes. |
| Pedestrian or bicyclist with own UM/UIM | Possible first-party backstop after the liability analysis | No automatic cure for ordinary property loss | The victim must know both the at-fault stack and the victim household's own declarations page. |
Higher tiers, umbrella, work use, and transportation-network coverage
| Scenario | What changes | Why the calculation changes |
|---|---|---|
| Higher personal-auto tier (50/100/25, 50/100/50, 100/300/100) | Larger bodily-injury and property-damage coverages | A severe crash may still overwhelm the policy, but the collapse is less severe than at 25/50/15. |
| High personal-auto limits plus umbrella | Excess liability may sit above the primary auto policy | If umbrella exists, settlement posture, release strategy, and UIM evaluation may change substantially. |
| Driver on the job | Employer auto, workers' compensation, or fleet questions may arise | The case may shift from a household policy to an employer / commercial stack. |
| TNC driver logged in but not on a ride | Arizona requires 25/50/20 primary liability during the logged-in waiting period | The waiting-period rideshare case may already differ from the ordinary household policy. |
| TNC driver on a ride | Arizona requires primary commercial liability of 250k per incident, increasing to 1M when the passenger is occupying the vehicle, plus specified UM coverage | The claim may be radically different from an ordinary 25/50/15 crash. |
| Personal auto during TNC activity | A personal-auto policy is not required to cover the vehicle, driver, owner, or third parties while the driver is logged in or providing transportation-network services unless the policy expressly says so | The ordinary personal-auto policy may disappear at exactly the moment a citizen assumes it still applies. |
Why disclosure still matters in Arizona
Arizona does not give claimants a simple Colorado-style presuit disclosure statute with a thirty-day deadline and daily penalties. Your earlier presuit-disclosure materials classify Arizona as a state with no general presuit duty, which means claimants are often pushed to negotiate, sign releases, or file suit without knowing whether the real case is minimum-limits, higher-tier, household-exclusion-limited, rideshare, employer, or umbrella.
That problem is even sharper in Arizona because the household may have separate UM/UIM protection but not know whether it was kept or rejected until the declarations page is obtained. The at-fault side and the injured household's own policy both matter.
Authorities and links
- A.R.S. § 28-4009 Arizona motor vehicle liability policy requirements and current 25/50/15 minimum limits.
- A.R.S. § 20-259.01 Arizona UM and UIM offer statute, declarations-page rule, UIM gap language, and one-policy selection language.
- A.R.S. § 12-2505 Comparative negligence; damages reduced in proportion to claimant fault.
- A.R.S. § 12-2506 Several-only liability and nonparty-at-fault allocation.
- A.R.S. § 12-611 Wrongful-death liability.
- A.R.S. § 12-612 Wrongful-death plaintiffs and distribution of recovery.
- A.R.S. § 12-613 Wrongful-death measure of damages.
- A.R.S. § 28-4038