What is Bodily Injury Liability Coverage?
Bodily injury liability (BI) is the foundation of every personal auto insurance policy in the United States. It pays for medical treatment, hospital stays, surgical procedures, lost wages, pain and suffering, and legal defense costs when you or an authorized driver cause an accident that harms another person.
Unlike collision or comprehensive coverage, bodily injury liability never pays for your own injuries. It is third-party protection designed to shield your personal savings, home equity, and future earnings from court judgments following an at-fault accident.
1. How Split Limits (e.g., 100/300/100) Work on Your Declaration Page
Most US insurance carriers display liability limits as three numbers separated by slashes. These represent thousands of dollars in coverage:
| Limit Tier | Per Person Limit | Per Accident Cap | Property Damage | Typical Risk Profile |
|---|---|---|---|---|
| 25/50/25 | $25,000 | $50,000 | $25,000 | State minimum in many states; high personal financial exposure. |
| 50/100/50 | $50,000 | $100,000 | $50,000 | Moderate baseline; covers minor to moderate injury claims. |
| 100/300/100 | $100,000 | $300,000 | $100,000 | Common industry benchmark for homeowners and middle-income drivers. |
| 250/500/100 | $250,000 | $500,000 | $100,000 | High asset protection; required threshold for Umbrella policy riders. |
2. What Happens When Bodily Injury Exceeds Your Policy Limit?
According to the National Association of Insurance Commissioners (NAIC), an insurer's legal obligation to pay settlements ends as soon as policy limits are exhausted.
If you carry a statutory minimum limit of $25,000 per person and cause an accident that results in $125,000 in emergency trauma surgery and rehabilitation for the other driver:
- Your insurer pays: $25,000 (the policy maximum).
- Remaining unpaid balance: $100,000.
- Personal Liability: The injured party's attorney can pursue a personal civil judgment against your personal bank accounts, liquid investments, and future wage garnishment.
3. Duty to Defend: How Legal Fees Are Handled
Under standard personal auto policies (ISO PP 00 01 Part A), insurers hold a Duty to Defend. When a claim leads to a lawsuit, the carrier must hire and pay for defense counsel to represent you in court.
In standard personal auto forms, defense costs are paid in addition to your liability limits, meaning attorney fees do not erode your available $100,000 or $250,000 settlement limit.
Comparing Bodily Injury on Competitor Quotes
When an online quote generator promises a rate that is $40/month cheaper, verify that they did not silently reduce your bodily injury coverage from 100/300 down to state minimums like 25/50.
Frequently Asked Questions
What is bodily injury liability on a car insurance declaration page?
Bodily injury liability (BI) pays for medical expenses, lost wages, rehabilitation, legal defense fees, and settlement costs of third parties who are injured or killed in a motor vehicle accident where you or a listed driver on your policy are legally at fault.
What do split limits like 100/300/100 mean?
In a 100/300/100 split limit structure, your insurer will pay up to $100,000 for bodily injury per person, up to $300,000 for bodily injury total per accident across all injured parties, and up to $100,000 for property damage per accident.
Are state minimum bodily injury liability limits enough protection?
State statutory minimums (such as 25/50/25 in many states or 30/60/15 in California) are rarely sufficient for multi-vehicle collisions or severe injuries. If medical damages exceed your policy limit, the at-fault driver is personally liable for the remaining balance through asset judgments and wage garnishment.
What is the difference between split limits and combined single limits (CSL)?
Split limits divide coverage into separate caps for per-person bodily injury, per-accident bodily injury, and property damage. A Combined Single Limit (e.g. $300,000 CSL) provides one lump-sum pool of money that pays for any combination of bodily injuries and property damage in an accident.
Related Guides & Interactive Audit Tools
Understanding Uninsured & Underinsured Motorist (UM/UIM) Coverage
Personal Injury Protection (PIP) vs MedPay: Key Differences Explained
Full Coverage vs Liability-Only: When to Drop Physical Damage
Look up statutory minimum bodily injury and property damage limits across all 50 states.
Verify that quotes provide adequate bodily injury protection beyond bare statutory minimums.