Updated July 2026
What Is Liability Insurance Insurance?
Liability insurance is the only coverage Arizona law requires you to carry. It pays when you cause an accident and someone else gets hurt or their property gets damaged. The coverage has two parts: bodily injury liability covers medical bills, lost wages, and legal costs for people you injure, while property damage liability pays to repair or replace vehicles and other property you damage. Your policy pays up to your selected limits, and anything beyond those limits comes out of your pocket.
- You're texting at a red light and rear-end the car in front of you. The other driver has a concussion and misses three weeks of work, racking up $18,000 in medical bills and $6,000 in lost wages. Their car needs $9,000 in repairs. Your bodily injury liability pays the full $24,000 in medical and wage costs because it's under your $25,000 per-person limit, and your property damage liability pays the $9,000 repair bill. Your own car damage and any injuries you sustain are not covered — you'd need collision coverage and medical payments coverage for that.
- You lose control on wet pavement and cause a three-car pileup. Two people in the first car suffer injuries totaling $30,000 each, and one person in the second car has $15,000 in medical bills. Your $50,000 per-accident bodily injury limit covers the total $75,000, but because you only carry Arizona's minimum, each injured person receives a reduced payout proportional to your limit. The first two victims each get $20,000 instead of $30,000, and the third gets $10,000 instead of $15,000. You're personally liable for the remaining $25,000, and the injured parties can sue you for it.
- You back into a parked Tesla in a grocery store lot, causing $12,000 in damage to the rear bumper and sensors. Your property damage liability pays the full repair cost because it's under your $15,000 limit. The Tesla owner's insurance company processes the claim through your carrier, and your rates increase at renewal. If the damage had been $18,000, you'd owe the Tesla owner $3,000 out of pocket for the amount exceeding your coverage limit.
Who Needs Liability Insurance Insurance?
Every driver in Arizona must carry liability insurance to register a vehicle and avoid license suspension. If you finance or lease your car, your lender requires you to carry liability limits higher than the state minimum — typically 100/300/100 — to protect their collateral. If you own assets like a home, retirement accounts, or significant savings, you need liability limits high enough to cover those assets in a lawsuit, because injury victims can pursue your personal wealth beyond your policy limits.
Start with Arizona's required 25/50/15 minimum, then calculate your total assets — home equity, savings, retirement accounts, and future earnings. If your assets exceed $50,000, increase your per-accident bodily injury limit to match. If you own a home or have significant retirement savings, carry at least 100/300/100 and consider a $1 million umbrella policy, which costs $15–$25 per month and covers liability beyond your auto policy limits. The cost difference between minimum and 100/300/100 is typically $20–$35 per month — far less than the financial risk of a serious at-fault accident.
How Much Does Liability Insurance Insurance Cost?
Arizona minimum liability coverage typically costs $45–$75 per month, or $540–$900 annually, for drivers with clean records.
- Your at-fault accident history in the past three years — one accident can increase liability premiums by 30–50 percent.
- Your ZIP code's claim frequency and average settlement costs — Phoenix metro rates run 15–25 percent higher than rural Arizona due to congestion and higher repair costs.
- The liability limits you select — increasing from state minimum 25/50/15 to 100/300/100 typically adds $20–$35 per month.
- Your credit-based insurance score in Arizona — poor credit can double your liability premium compared to excellent credit.
- Whether you bundle liability with comprehensive and collision coverage — standalone liability policies cost 10–20 percent more per dollar of coverage than bundled full-coverage policies.