The short answer
Liability car insurance pays for injuries and property damage you cause to others — never your own car. The three numbers (like 100/300/100) are limits in thousands: bodily injury per person, bodily injury per accident, and property damage per accident. The Insurance Information Institute recommends 100/300/100 as a baseline, well above typical 25/50/25 state minimums.
What does liability car insurance cover?
Liability car insurance covers the injuries and property damage you cause to other people in an at-fault crash — their medical bills, lost wages, and vehicle repairs. It pays nothing toward your own car or injuries. It splits into bodily injury and property damage liability, written as limits like 100/300/100 by the Insurance Information Institute.
- Bodily injury (BI): the other party's medical costs, lost income, and pain-and-suffering claims when you're at fault.
- Property damage (PD): their vehicle, plus fences, mailboxes, buildings, or poles you hit.
- Not your car: repairing your own vehicle requires collision and comprehensive coverage, and your own injuries need medical payments or PIP.
The Insurance Information Institute describes liability as the coverage that pays for others' losses when you're legally responsible. For how it fits with the rest of a policy, see the types of car insurance explained.
What do the three liability numbers mean?
The three numbers — for example 100/300/100 — are liability limits expressed in thousands of dollars. The first is bodily injury per person, the second is bodily injury per accident, and the third is property damage per accident. So 100/300/100 means $100,000 per injured person, $300,000 total per accident, and $100,000 for property damage.
| Number | What it covers | Example: 100/300/100 |
|---|---|---|
| 1st — BI per person | Max paid for any one injured person | $100,000 |
| 2nd — BI per accident | Max paid for all injuries in one accident | $300,000 |
| 3rd — PD per accident | Max paid for others' property damage | $100,000 |
A 25/50/25 policy means $25,000 per person, $50,000 per accident, and $25,000 in property damage. The Insurance Information Institute uses this same three-number shorthand across its coverage guides.
How much liability insurance do you need?
Carry liability limits at least equal to your net worth, because an at-fault crash that exceeds your limits exposes your savings and assets to a lawsuit. The Insurance Information Institute recommends 100/300/100 as a baseline for most drivers — far above typical 25/50/25 state minimums. Drivers with more assets often add an umbrella policy on top.
- Match your net worth: set BI and PD limits high enough that a serious claim won't reach your home, savings, or wages.
- Start at 100/300/100: the III's recommended baseline shields most households from a single severe crash.
- Add an umbrella policy for $1 million or more of extra liability if you have significant assets to protect.
- Budget alongside the rest: compare quotes and see how much car insurance costs before settling on limits.
Is the state-minimum liability limit enough?
Usually not. Many state minimums are just 25/50/25, and some allow as little as 15/30/5 — limits a single serious injury or a totaled luxury vehicle can blow past in one crash. The minimum keeps you legal, but it often leaves you personally exposed once medical bills and repair costs add up. Confirm your own state's floor with its DMV.
| Typical state minimum | III recommended baseline | |
|---|---|---|
| Bodily injury per person | $15,000–$25,000 | $100,000 |
| Bodily injury per accident | $30,000–$50,000 | $300,000 |
| Property damage per accident | $5,000–$25,000 | $100,000 |
| Shorthand | 15/30/5 to 25/50/25 | 100/300/100 |
State minimums vary widely and change over time, so confirm the current figures with your state's department of motor vehicles or insurance. The Insurance Information Institute notes that minimums are often well below what a serious accident actually costs.
What happens if your liability limits are too low?
If an at-fault accident costs more than your liability limits, your insurer pays up to the limit and you owe the rest out of pocket. The injured party can sue you for the difference, and a court can pursue your savings, wages, and other assets. This is exactly why carrying limits near your net worth — and the III's 100/300/100 baseline — matters.
- Insurer pays to the cap. A 25/50/25 policy stops at $25,000 per injured person, no matter the actual bills.
- You owe the excess. Damages above your limit become your personal responsibility.
- You can be sued. The other party can take you to court for the unpaid balance.
- Assets are at risk. A judgment can reach your home equity, savings, and future wages.
Higher limits and an umbrella policy exist to close this gap. For the bigger picture on what a policy should include, see the types of car insurance explained.
Frequently asked questions
Does liability insurance cover my own car?
No. Liability insurance only pays for injuries and property damage you cause to other people. It pays nothing toward repairing or replacing your own car or treating your own injuries. For that you need collision and comprehensive coverage, plus medical payments or PIP.
What does 100/300/100 mean in car insurance?
The numbers are liability limits in thousands of dollars: $100,000 in bodily injury per person, $300,000 in bodily injury per accident, and $100,000 in property damage per accident. The Insurance Information Institute recommends 100/300/100 as a sensible baseline for most drivers.
Is the state minimum liability limit enough?
Usually not. Many state minimums are just 25/50/25, and some allow as little as 15/30/5. A single serious injury or a totaled luxury vehicle can blow past those caps, leaving you personally responsible for the rest. Most advisors suggest carrying more than the legal floor.
How much liability car insurance do I need?
A common rule is to carry liability limits at least equal to your net worth, since an at-fault crash that exceeds your limits exposes your savings and assets to a lawsuit. The Insurance Information Institute recommends 100/300/100 as a baseline for most drivers.
What happens if an accident exceeds my liability limits?
Your insurer pays up to your limit, and you are personally responsible for the difference. The injured party can sue you for the excess, and a court can pursue your savings, wages, and other assets. Higher limits and umbrella coverage exist to prevent exactly this gap.
Sources
CarsLens is editorial guidance, not individualized advice. State minimums change and should be confirmed with your state DMV or insurance department. This page draws on the Insurance Information Institute.