Arizona doesn't just suggest you carry car insurance. Every registered vehicle needs continuous proof of financial responsibility, and the state runs an electronic system that checks for it whether or not you ever get pulled over. The general concepts, why states require liability coverage, what an at-fault state means, how comparative negligence works, are covered on our national guide. Here's what's actually true if your car is registered in Arizona: the exact dollar amounts, the paperwork rules, and what happens when someone skips it.
The numbers Arizona requires
Since July 1, 2020, Arizona's minimum liability limits have been $25,000 per person and $50,000 per accident for bodily injury, plus $15,000 for property damage, usually written as 25/50/15.1 That's an increase from the prior floor of 15/30/10, which still governs policies that haven't been issued or renewed since the change took effect.1 The Department of Insurance and Financial Institutions (DIFI), Arizona's insurance regulator, confirms 25/50/15 as the current statewide floor on its consumer site.2
These are floors, not targets. A hospital stay after a moderate-speed collision routinely runs past $25,000 before you've left the ICU, and Arizona places no cap on what you can recover in a personal injury or wrongful death case.3 If the driver who hit you is carrying the state minimum and your damages are worse than that, the gap between what their policy pays and what you actually lost is yours to close, usually through your own coverage.
No PIP, no no-fault, just liability
Arizona is a pure tort, at-fault state. There's no personal injury protection (PIP) mandate and no no-fault system layered on top of the liability requirement. Fault gets assigned, and under Arizona's pure comparative negligence rule, a driver found partly responsible can still recover damages reduced by their own share of fault, even at 99%.4 Medical payments coverage (med-pay) exists as an optional add-on that pays your own medical bills regardless of fault, but nothing in Arizona law requires an insurer to offer it or a driver to buy it. If your insurer covers your medical bills through med-pay and later recovers from the at-fault driver, its reimbursement lien is capped at whatever it paid above $5,000.5
UM and UIM aren't mandatory, but insurers have to offer them
Nothing in Arizona law forces you to buy uninsured motorist (UM) or underinsured motorist (UIM) coverage. What the law does require is that every insurer selling auto liability policies here make a written offer of both, at limits equal to whatever bodily injury liability limits you're carrying.5 If you want to turn it down, you have to do it in writing, and your policy's declarations page stands as the final record of that decision.5 DIFI puts it plainly for consumers: if you do elect UM or UIM, 25/50 is the least you can carry.2
This matters more in Arizona than in states with tighter mandatory floors, precisely because the liability minimum here is thin. A driver carrying exactly $25,000 in bodily injury coverage who causes a serious wreck leaves you looking at your own UM/UIM policy, if you kept it, to cover anything beyond that.
Carrying proof, and how the state checks
Arizona requires evidence of financial responsibility inside the vehicle itself, and it doesn't have to be paper. A.R.S. § 28-4133 lets you show either a physical insurance ID card or an image of that card displayed on a wireless device; either one satisfies an officer's request to verify coverage.6 Insurers are required to issue at least two ID cards per policy.6
Behind the scenes, Arizona doesn't wait for a traffic stop to find out you've let coverage lapse. Insurers licensed to sell auto liability policies in the state must electronically report every cancellation, nonrenewal, and new policy issuance to the Arizona Department of Transportation within seven days of processing it.7 When a cancellation comes through, the insurer also has to notify the policyholder that ADOT has been told and that the registration may be suspended as a result.7 That reporting requirement is what lets Arizona flag lapsed coverage without an officer ever seeing your car.
What driving without it actually costs
Get caught without proof of financial responsibility and Arizona runs a graduated penalty schedule under A.R.S. § 28-4135. A first violation carries a minimum $500 fine and a three-month restriction on driving privileges.8 A second violation within 36 months steps up to a minimum $750 fine plus a six-month suspension of license, registration, and plates.8 A third violation in that same 36-month window brings a minimum $1,000 fine, a full year of suspension across license, registration, and plates, and a requirement to file proof of financial responsibility with the department before reinstatement.8 There's an out for a genuine paperwork gap: a citation can be dismissed if you actually had coverage at the time and produce proof before your court date.8
Alternatives to buying a policy
Most individual drivers just buy liability insurance, but it isn't the only route to compliance. Arizona lets fleet owners and other qualifying entities apply for a certificate of self-insurance instead, provided they can show the department's director they're financially able to cover the same amounts a policy would.9 This route is built for companies with large fleets, not individual drivers, and it requires the department's approval before it satisfies the law.9
Why the state minimum rarely covers a real crash
Arizona's constitution bars any law that caps damages for wrongful death or personal injury, with one narrow exception for a felon hurt while committing the felony.3 That protection means a jury verdict or settlement in a serious crash case can run far past what a 25/50/15 policy will ever pay out. The property damage side is just as thin: $15,000 doesn't go far against a newer vehicle, and if your car's value took a hit even after repairs, that's a separate claim worth understanding on its own (see our Arizona diminished value guide).
You generally have two years from the date of the crash to file a personal injury or property damage lawsuit in Arizona, so the clock is shorter than people expect.10 If you're dealing with an insurer that's lowballing a claim, disputing fault, or slow-walking a UM claim toward that deadline, an attorney who works Arizona crash cases can push back before it matters. Our legal directory lists firms that handle these claims across the state. And if you still need the official record of what happened, our Arizona crash reports guide can help.
This is general information about Arizona law, not legal advice for your specific situation.
Sources
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A.R.S. § 28-4009, Arizona State Legislature. https://www.azleg.gov/ars/28/04009.htm
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Automobile Insurance, Arizona Department of Insurance and Financial Institutions (DIFI). https://difi.az.gov/consumer/i/auto/minimum-coverage
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Ariz. Const. art. 2, § 31, Arizona State Legislature. https://www.azleg.gov/const/2/31.htm
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A.R.S. § 12-2505, Arizona State Legislature. https://www.azleg.gov/ars/12/02505.htm
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A.R.S. § 20-259.01, Arizona State Legislature. https://www.azleg.gov/ars/20/00259-01.htm
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A.R.S. § 28-4133, Arizona State Legislature. https://www.azleg.gov/ars/28/04133.htm
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A.R.S. § 28-4148, Arizona State Legislature. https://www.azleg.gov/ars/28/04148.htm
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A.R.S. § 28-4135, Arizona State Legislature. https://www.azleg.gov/ars/28/04135.htm
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A.R.S. § 28-4007, Arizona State Legislature. https://www.azleg.gov/ars/28/04007.htm
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A.R.S. § 12-542, Arizona State Legislature. https://www.azleg.gov/ars/12/00542.htm