Uninsured Drivers in Arizona: Why UM/UIM Coverage Is More Important Than You Think

Arizona has one of the higher rates of uninsured drivers in the United States — which means there's a real chance that if you're hit by another driver, they won't have insurance to cover your medical bills, lost wages, or vehicle damage. Uninsured and underinsured motorist coverage (UM/UIM) fills that gap, and it's one of the most cost-effective additions you can make to an Arizona auto policy. If you drive in Mesa, Gilbert, Chandler, Phoenix, or anywhere in the East Valley, this coverage deserves a closer look.

The Uninsured Driver Problem in Arizona

Arizona law requires drivers to carry auto liability insurance. The minimum requirement is 15/30/10 — meaning $15,000 per person for bodily injury, $30,000 per accident for bodily injury, and $10,000 for property damage.

The problem is that a meaningful percentage of Arizona drivers either don't carry insurance at all or carry only the bare minimum. Studies have consistently placed Arizona among the states with the highest rates of uninsured motorists — estimates generally range from 10 to 12 percent of drivers, though some analyses put it higher in certain metro areas.

In practical terms, that means roughly one in ten drivers you share the road with in Mesa, Tempe, Scottsdale, or anywhere in Maricopa County may have no insurance whatsoever. And the drivers who do carry insurance often carry only the minimum limits — which can be exhausted quickly in a serious accident.

That's the environment UM/UIM coverage is designed for.

What Uninsured Motorist Coverage Actually Pays For

Uninsured motorist (UM) coverage steps in when you're hit by a driver who has no insurance at all. It covers what their liability policy would have covered — if they'd had one.

Specifically, UM coverage can pay for:

Your medical bills and rehabilitation costs
Lost wages if your injuries keep you from working
Pain and suffering damages
Vehicle repair or replacement costs (under uninsured motorist property damage coverage, which is a separate component in Arizona)

Without UM coverage, your options after being hit by an uninsured driver are limited. You can pursue the driver personally, but if they have no insurance, there's a reasonable chance they don't have assets worth pursuing either. You're left filing against your own collision coverage for the vehicle damage — and paying your own medical bills out of pocket or through health insurance, which may have its own deductibles and limits.

UM coverage changes that picture entirely. It's your own policy responding on your behalf when the at-fault driver can't.

What Underinsured Motorist Coverage Adds

Underinsured motorist (UIM) coverage addresses a slightly different but equally common scenario — one where the at-fault driver has insurance, but not enough to cover the full cost of your damages.

Arizona's minimum liability limits are $15,000 per person for bodily injury. A serious accident involving emergency care, surgery, hospitalization, and follow-up treatment can easily exceed that amount several times over. Once the at-fault driver's policy limit is exhausted, UIM coverage picks up the remainder — up to your own UIM limit.

This matters because minimum-limit drivers are common on Arizona roads. A driver carrying the state minimum is technically insured, but their coverage may be nowhere near adequate if they cause a serious accident. UIM is what keeps that gap from becoming your problem.

How UM/UIM Is Priced — And Why It's Worth It

One of the reasons UM/UIM coverage is consistently recommended by independent agents is that it's inexpensive relative to the protection it provides.

Adding meaningful UM/UIM limits to an existing Arizona auto policy typically costs a fraction of what comprehensive or collision coverage costs. The exact premium depends on your limits, your driving history, your vehicle, and your carrier — but for most drivers in Mesa and the surrounding East Valley, the added cost is modest.

Consider what you're buying: if you're in a serious accident caused by an uninsured or underinsured driver — not a rare event in Arizona — UM/UIM can mean the difference between your medical bills being covered and paying them yourself. That's a significant amount of financial protection for a relatively small addition to your premium.

Stacked vs. Non-Stacked UM/UIM in Arizona

Arizona is one of the states that allows policyholders to stack UM/UIM coverage across multiple vehicles on the same policy. It's worth understanding what that means.

With stacked coverage, if you have two vehicles on your policy and each carries $100,000 in UM/UIM limits, you can stack those limits — giving you up to $200,000 of UM/UIM protection per accident. Non-stacked coverage keeps each vehicle's limit separate.

Stacked coverage typically costs more than non-stacked, but the increased protection can be meaningful for households with multiple vehicles. Whether stacking makes sense depends on your specific situation — your number of vehicles, your existing limits, and how much overall UM/UIM protection you want.

This is exactly the kind of decision where talking to an independent agent pays off. At Veros Insurance Group in Mesa, we walk through the stacking question with clients directly so they understand what they're choosing and why.

Why Rejecting UM/UIM Is a Risk Worth Thinking Twice About

In Arizona, insurers are required to offer UM/UIM coverage. Policyholders can reject it in writing. Some drivers do, usually to lower their premium.

That's a legitimate choice — but it's worth being clear-eyed about what you're giving up. In an environment where a significant share of drivers on Arizona roads are uninsured or minimally insured, declining UM/UIM means accepting full personal exposure to those drivers' actions.

A single serious accident involving an uninsured driver can result in medical bills, lost income, and vehicle losses that far exceed any premium savings over years of coverage. The math generally favors keeping UM/UIM — particularly at meaningful limits, not just the minimums.

Frequently Asked Questions

Am I required to have UM/UIM insurance in Arizona?
No. Arizona law requires insurers to offer UM/UIM coverage, but you can reject it in writing. However, rejecting it means you're personally responsible for losses caused by uninsured or underinsured drivers. Given Arizona's relatively high rate of uninsured motorists, declining this coverage carries real financial risk.

What if the at-fault driver has some insurance but not enough?
That's exactly what underinsured motorist (UIM) coverage handles. If the at-fault driver's liability limits are exhausted before your damages are fully covered, your UIM coverage picks up the remainder — up to your own UIM policy limit. You don't need to be hit by someone with zero insurance for UIM to apply.

Does UM/UIM cover hit-and-run accidents in Arizona?
Yes, in most cases. Hit-and-run accidents are generally treated similarly to uninsured motorist claims under Arizona law, because the at-fault driver effectively has no available coverage. Your UM coverage can respond to a hit-and-run claim, though specific policy language and reporting requirements vary by carrier. Reporting the accident to law enforcement promptly is important for any hit-and-run claim.

Talk to Veros Insurance Group About Your Auto Coverage

If you're driving in Mesa, Gilbert, Chandler, Tempe, Scottsdale, Queen Creek, or anywhere in the Phoenix metro area, your auto coverage deserves a straightforward review — especially the UM/UIM piece.

At Veros Insurance Group, we're an independent insurance agency based in Mesa, AZ. We've been helping Arizona drivers find the right auto coverage since 2009, and because we work with multiple carriers, we can compare options rather than defaulting to whatever one company offers.

If you're not sure what UM/UIM limits you're carrying, or whether they're adequate for how and where you drive, that's a five-minute conversation worth having.

Request a free auto insurance review at https://www.verosgroup.com/get-a-quote/ or call us directly. No pressure — just real answers from a local agent who knows the Arizona market.

Related pages: Auto Insurance| Personal Insurance