Arizona Car Insurance Requirements: Minimums, Penalties, and UM/UIM Rules
Arizona requires every driver to carry auto liability insurance with minimum limits of $25,000 per person and $50,000 per accident for bodily injury, plus $15,000 for property damage, commonly written as 25/50/15 (ARS 28-4009). Insurers must offer uninsured and underinsured motorist (UM/UIM) coverage in writing, though Arizona does not require you to buy it. Below is what the law requires, what happens if you drive without coverage, and where Arizona's monsoon and snowbird seasons add risk that liability insurance alone won't cover, subject to the policy's terms, exclusions, and any applicable endorsements. Review our auto insurance coverage options for Arizona drivers.
Arizona Minimum Car Insurance at a Glance
| Requirement | Arizona rule | Source |
|---|---|---|
| Bodily injury liability, per person | $25,000 | ARS 28-4009 |
| Bodily injury liability, per accident | $50,000 | ARS 28-4009 |
| Property damage liability | $15,000 | ARS 28-4009 |
| Uninsured/underinsured motorist (UM/UIM) | Insurers must offer it in writing; you are not required to buy it | ARS 20-259.01 |
| Fault rule | Pure comparative fault: your recovery is reduced by your own share of fault | ARS 12-2505 |
| Driving without insurance | Civil penalty of at least $500 and a three-month license suspension or restriction for a first violation, rising to at least $750 and $1,000 with longer suspensions for repeat violations within 36 months | ARS 28-4135 |
| Uninsured at the time of an accident | License and registration suspended 15 days after a suspension notice is mailed, for a minimum of one year | ARS 28-4143, ARS 28-4144 |
Sources: ARS 28-4009, ARS 20-259.01, ARS 12-2505, ARS 28-4135, ARS 28-4143, and ARS 28-4144. Figures reflect the statutes as published in 2026; a policy's actual benefits are subject to its terms, exclusions, and any applicable endorsements.
Arizona's Minimum Auto Insurance Requirements
The 25/50/15 minimum has applied since July 1, 2020. Before that date, Arizona's minimums were lower, at 15/30/10 (ARS 28-4009). The $25,000/$50,000 bodily injury limits cap what your liability coverage pays for one person's injuries and for all injuries combined in a single accident; the $15,000 property damage limit caps what it pays for damage you cause to someone else's vehicle, fence, or other property. These limits are the legal floor, not a recommendation, and whether they are enough for you depends on your assets and risk tolerance.
Beyond the Minimum
Arizona's 25/50/15 minimum satisfies the law, but medical bills and today's vehicle repair costs can exceed those limits quickly, leaving you personally responsible for the difference. Discounts for bundling policies, a clean driving record, or a higher deductible can help offset the cost of carrying higher limits. Our auto insurance page walks through coverage options and how carriers price them; actual rates and available discounts vary by carrier and individual circumstances.
Arizona-Specific Considerations
Uninsured Motorist Coverage
Arizona law requires insurers to offer UM/UIM coverage to you in writing, but it does not require you to purchase it (ARS 20-259.01). An estimated 10.6% of Arizona motorists were uninsured in 2023, according to Insurance Research Council data published by the Insurance Information Institute. Because a meaningful share of drivers on Arizona roads carry no coverage, many drivers choose to keep UM/UIM on their policy so they have a source of recovery if an uninsured driver injures them, subject to the policy's terms, exclusions, and any applicable endorsements.
Extreme Heat Effects
Arizona's intense heat affects vehicles: tire blowouts are more common in summer, and battery failures increase. Comprehensive coverage, which is optional, may help with heat-related damage such as a vehicle fire, subject to the policy's terms, exclusions, and any applicable endorsements. Routine mechanical wear from heat is generally not something a standard auto policy covers.
Monsoon Season
Arizona's summer monsoons bring flash flooding and dust storms that reduce visibility with little warning. If you encounter a dust storm while driving, ADOT's "Pull Aside, Stay Alive" guidance is to not drive into it: pull off the roadway as soon as it's safe to do so, turn off all your lights including your hazards, keep your foot off the brake, and wait it out. Comprehensive coverage may help with flood or storm damage to your own vehicle, subject to the policy's terms, exclusions, and any applicable endorsements; it does not change how you should drive through one.
High Snowbird Season
Winter brings many seasonal residents and visitors who may be unfamiliar with local roads and driving conditions, which can increase accident risk in areas with heavy seasonal traffic. This is one more reason drivers weigh keeping UM/UIM coverage on their policy year-round rather than only during the summer monsoon months.
Optional but Recommended Coverages
None of the coverages below are required by Arizona law, but each addresses a gap that the state's 25/50/15 liability minimum leaves open, since liability coverage only pays for injuries and property damage you cause to others.
Fault and Your Claim
Arizona uses a pure comparative fault rule: if you are partly at fault for an accident, your recovery from the other driver is reduced in proportion to your own share of fault, rather than barred outright (ARS 12-2505). This affects how a claim between two drivers is valued and is separate from the no-fault or fault-based nature of your own policy's coverages, which is set by the policy's terms, exclusions, and any applicable endorsements.
Penalties for Driving Without Insurance
Arizona requires every vehicle driven on its highways to carry financial responsibility, generally auto liability insurance meeting the 25/50/15 minimums. Driving without it is a civil violation under ARS 28-4135: a first violation carries a civil penalty of at least $500 and a three-month suspension or restriction of your driving privileges; a second violation within 36 months carries at least $750 and a six-month suspension of your license, registration, and plates; and a third or later violation within 36 months carries at least $1,000 and a one-year suspension.
Arizona can also check insurance after an accident. If the state finds the vehicle was uninsured on the date of the accident, it mails a suspension notice, and the owner's driver license and vehicle registration are suspended 15 days after that notice is mailed unless the owner proves coverage or requests a hearing (ARS 28-4143 and 28-4144). That suspension lasts a minimum of one year, and ending it requires filing proof of financial responsibility and paying reinstatement fees of $10 for the driver license and $25 for the registration. Beyond the legal penalties, if you cause an accident while uninsured, you can be held personally responsible for the other driver's injuries and property damage.
Get Arizona Auto Coverage
Arizona's minimum requirements set a legal floor, not a recommendation, and drivers in Phoenix, Tucson, and communities across the state carry very different risks and assets. Through our Arizona insurance services, we help you compare coverage options against your situation, whether that means confirming the state minimum is enough or building a policy with higher liability limits, UM/UIM coverage, and comprehensive protection.
Coverage options and rates vary by carrier and circumstances. This information is educational only.
Ready for a quote? Contact us or call (208) 880-5598.