How Much Auto Insurance Coverage Do You Need in Arizona?

The right amount of auto insurance depends on your vehicle, savings, income, household assets, and how much you're willing to pay out of pocket after an accident. Most Arizona drivers need more than the state minimum because minimum limits can fall short of covering a serious injury claim or the cost of replacing a newer vehicle.

The hard truth: Arizona requires only $25,000 in bodily injury coverage per person. A single trip to the emergency room can exceed that before a patient leaves the building. If your policy limit runs out, the difference comes from your bank account, your paycheck, or a lawsuit against your assets.

This guide explains every major coverage type, decodes what numbers like 100/300/100 actually mean, and gives you a simple framework for choosing limits that match your real financial exposure, not just the state's legal floor.

Key takeaway: The state minimum keeps you legal. The right coverage keeps you financially protected. Those are two different things.

How Much Auto Insurance Coverage Do Most Arizona Drivers Need?

Most Arizona drivers need at least 100/300/100 in liability coverage, plus collision, comprehensive, and uninsured motorist protection. The exact right answer depends on four variables specific to you.

The Four Variables That Determine Your Coverage Needs

• Vehicle value: If your car is worth more than $10,000, collision and comprehensive coverage make financial sense.
• Savings and liquid assets: The more you have, the more you stand to lose in a lawsuit.
• Income: Wages can be garnished if a judgment exceeds your policy limits.
• Household risk tolerance: How much out-of-pocket cost could you absorb without serious hardship?

A driver with a paid-off 2012 sedan, minimal savings, and a modest income has a different risk profile than someone with a 2024 truck, a home, and a retirement account. The state minimum might be technically sufficient for the first driver. It is almost certainly not enough for the second.

The common mistake: Most people set their limits when they first buy a policy and never revisit them. Life changes, assets grow, and the coverage that made sense at 25 often leaves a 40-year-old significantly underinsured.

The Main Types of Auto Insurance Coverage

Auto insurance is not a single product. It is a bundle of coverages, each protecting against a different type of loss. Understanding what each one does is the only way to know whether you have enough.

Bodily Injury and Property Damage Liability

Liability coverage is the foundation of every auto policy in Arizona and the only coverage the state legally requires. It pays for injuries and property damage you cause to others in an at-fault accident. It does not pay for your own injuries or vehicle damage.

Liability limits are expressed as three numbers, such as 25/50/15:

• First number: Maximum payout per injured person ($25,000)
• Second number: Maximum payout for all injuries in one accident ($50,000)
• Third number: Maximum payout for property damage in one accident ($15,000)

Why the minimum falls short: Arizona's minimum property damage limit is $15,000. The average new vehicle transaction price in the U.S. exceeded $48,000 in 2024. If you total someone's financed SUV, you could owe the difference out of pocket.

Collision and Comprehensive

These two coverages protect your own vehicle rather than the other party's.

• Collision pays to repair or replace your car after an accident, regardless of who caused it.
• Comprehensive covers non-collision losses: theft, vandalism, hail, flooding, and animal strikes.

Neither is required by Arizona law, but lenders and leasing companies almost always require both when you finance or lease a vehicle. Even without a lender requirement, both coverages make sense if your vehicle's value exceeds what you could comfortably replace out of pocket.

Uninsured and Underinsured Motorist Coverage

Arizona does not require uninsured motorist (UM) or underinsured motorist (UIM) coverage, but insurers must offer it. Drivers can decline in writing. That is a significant decision, given that roughly 1 in 9 Arizona drivers carries no insurance at all, according to industry estimates.

• UM coverage pays your medical bills and lost wages when an uninsured driver causes the accident.
• UIM coverage fills the gap when the at-fault driver has insurance but not enough to cover your damages.

Without this coverage, you are absorbing the financial risk of every uninsured driver on Arizona roads. That is a risk most drivers cannot afford to take.

What 100/300/100 Means in Car Insurance

The notation 100/300/100 is shorthand for liability coverage limits. Each number represents a dollar amount in thousands.

• 100 (first number): Bodily injury per person - $100,000
• 300 (second number): Bodily injury per accident (total) - $300,000
• 100 (third number): Property damage per accident - $100,000

So a 100/300/100 policy will pay up to $100,000 for any single person injured in an accident you cause, up to $300,000 total if multiple people are hurt in the same accident, and up to $100,000 for damage to the other party's vehicle or property.

Why 100/300/100 Is the Common Recommendation

Independent agents and financial planners frequently cite 100/300/100 as a reasonable starting point for drivers with meaningful assets. Here is why:

• Medical costs are unpredictable. A serious injury involving surgery, hospitalization, and rehabilitation can easily exceed $100,000 per person. The state minimum of $25,000 per person would be exhausted quickly.
• Multi-vehicle accidents happen. If you cause a collision involving two or three other vehicles, the $50,000 per-accident minimum could be split across multiple injured parties, leaving each one severely undercompensated and leaving you exposed to a lawsuit.
• Property damage is expensive. At $100,000 in property damage coverage, you have room to cover a newer vehicle or multiple damaged cars. The state's $15,000 minimum does not.

The step up in cost is smaller than most people expect. Increasing liability limits from 25/50/15 to 100/300/100 typically adds a modest amount to a monthly premium, often less than the cost of one meal out. The coverage difference, however, is substantial.

According to NAIC data, liability coverage represents only a fraction of total auto insurance costs, which means upgrading limits is one of the most cost-efficient ways to reduce financial exposure.

Arizona's Minimum Insurance Requirements Versus Recommended Limits

Arizona law requires every driver to carry liability insurance with the following minimums, as established by the Arizona Department of Transportation and enforced through the Motor Vehicle Division:

• Bodily injury (per person): Arizona minimum $25,000 - Recommended $100,000
• Bodily injury (per accident): Arizona minimum $50,000 - Recommended $300,000
• Property damage (per accident): Arizona minimum $15,000 - Recommended $100,000
• Uninsured motorist: Not required by Arizona law - Recommended at matching liability limits
• Collision: Not required by Arizona law - Required if financed; advised if vehicle value exceeds $10,000
• Comprehensive: Not required by Arizona law - Required if financed; advised for most vehicles

What the Minimums Actually Cover

Arizona is an at-fault state. When you cause an accident, your liability coverage pays for the other party's injuries and property damage. The state minimum covers a narrow range of outcomes. A two-car accident with one injured occupant and a newer vehicle on the other side can exceed the minimum limits entirely.

Real-world scenario: You run a red light and strike a vehicle carrying two passengers. One passenger requires surgery ($80,000) and the other has moderate injuries ($30,000). Their vehicle is a 2023 model worth $38,000 and is totaled. Your minimum-limit policy pays $25,000 toward the first injury, $25,000 toward the second (capped at the $50,000 per-accident limit), and $15,000 toward the vehicle. The remaining $73,000 in uncovered damages does not disappear. It becomes your personal liability.

The Uninsured Driver Problem in Arizona

About 1 in 9 Arizona drivers carries no auto insurance, according to industry estimates. Arizona is an at-fault state, which means if an uninsured driver hits you and causes injuries, you are left pursuing a driver who has no coverage and may have no assets. Without UM/UIM coverage on your own policy, your medical bills and lost wages become your problem.

Adding uninsured motorist coverage at limits matching your liability limits is one of the most practical coverage decisions an Arizona driver can make.

A Simple Coverage Calculation for Your Vehicle, Income, and Assets

There is no universal right answer, but there is a straightforward framework for arriving at limits that make sense for your situation. Work through these three questions.

Step 1: What Is Your Vehicle Worth?

Look up your vehicle's current market value using a source like Kelley Blue Book or Edmunds. Then ask: if this vehicle were totaled tomorrow, could I replace it without a loan?

• If no: Carry collision and comprehensive coverage. The deductible you choose (typically $500 to $1,000) affects your premium. A higher deductible lowers your premium but increases your out-of-pocket cost after a claim.
• If yes, and the vehicle is worth less than $4,000-$5,000: Collision and comprehensive may cost more over time than the payout would be worth. This is the threshold where dropping physical damage coverage sometimes makes financial sense.

Step 2: What Are Your Exposed Assets?

Add up your liquid savings, home equity, retirement accounts, and any other assets that could be reached in a lawsuit judgment. In Arizona, some assets have legal protections, but wages, bank accounts, and non-exempt property are generally reachable.

Rule of thumb: Your liability limits should be at least as high as your total exposed net worth. If you have $200,000 in combined assets, carrying 25/50/15 leaves $185,000 in bodily injury exposure uncovered. If a judgment exceeds your limits, you pay the difference.

For drivers with significant assets, an umbrella policy (typically $1 million in additional liability coverage) is worth considering as an additional layer of protection.

Step 3: What Can You Absorb Out of Pocket?

Your deductible on collision and comprehensive is the amount you pay before insurance covers the rest. Choose a deductible you could genuinely write a check for today without financial hardship. Choosing a $2,000 deductible to save $15 a month is only a good deal if you have $2,000 available when you need it.

Coverage Decision Summary

• Financed or leased vehicle: Collision and comprehensive required; 100/300/100 liability.
• Vehicle worth $10,000+ and paid off: Collision and comprehensive strongly advised.
• Significant savings or home equity: 100/300/100 or higher; consider an umbrella policy.
• Vehicle worth under $5,000, minimal assets: State minimum may be adequate; add UM/UIM.
• Any driver on Arizona roads: Uninsured motorist coverage at matching liability limits.

When to Review Your Limits

Coverage that fit your life three years ago may not fit it today. Most people review their policy only when the renewal arrives, and even then, they tend to accept whatever renews automatically. That is how coverage gaps develop quietly.

Review your auto insurance limits when any of the following apply:

• You bought or financed a new or newer vehicle
• Your income increased significantly
• You purchased a home or increased your home equity
• You added a teen or young adult driver to your household
• You paid off your vehicle and your lender no longer requires collision or comprehensive
• You had a claim and want to understand what your policy actually paid versus what you owed
• You have not reviewed your policy in more than two years

The Annual Review Habit

An annual review does not have to be complicated. The goal is to confirm that your limits still reflect your financial situation and that you are not paying for coverage you no longer need or missing coverage you now do.

For Arizona drivers, the review is also an opportunity to compare rates across carriers. Because vehicle values, driving records, and credit profiles change over time, the carrier that offered the best rate three years ago may not be the best option today. An independent agent can compare options across multiple carriers in a single conversation, rather than requiring you to request quotes one at a time.

If you have not reviewed your auto coverage recently, or if you are unsure whether your current limits are adequate, Riseson Insurance can walk through your policy, explain what you have, identify any gaps, and compare options across 20+ carriers to find coverage that fits both your needs and your budget.

Frequently Asked Questions

Is Arizona minimum liability coverage enough?

For many drivers, no. Arizona's minimum of 25/50/15 covers a narrow range of accident outcomes. A single serious injury can exceed the $25,000 per-person limit, and the $15,000 property damage limit falls short of the cost of most newer vehicles. Drivers with savings, a home, or other assets face meaningful financial exposure if a claim exceeds their limits.

What does 100/300/100 mean in car insurance?

It means your policy will pay up to $100,000 for bodily injury to any one person, up to $300,000 total for all bodily injuries in a single accident, and up to $100,000 for property damage in a single accident. These are liability limits, covering damages you cause to others. They do not cover your own injuries or vehicle.

Do I need comprehensive and collision coverage in Arizona?

Arizona law does not require either, but your lender or leasing company almost certainly does if you finance or lease your vehicle. Even without a lender requirement, both coverages make sense if your vehicle is worth more than you could comfortably replace out of pocket. Once a vehicle's value drops below roughly $4,000 to $5,000, the math on carrying physical damage coverage becomes less favorable.

What is uninsured motorist coverage and do I need it in Arizona?

Uninsured motorist (UM) coverage pays your medical expenses and lost wages when a driver with no insurance causes an accident that injures you. Underinsured motorist (UIM) coverage fills the gap when the at-fault driver has insurance but not enough to cover your damages. Arizona does not require either, but given that approximately 1 in 9 Arizona drivers is uninsured, carrying UM/UIM coverage at limits matching your liability coverage is a practical and often affordable protection.