How Much Liability Coverage Do You Need?

Liability coverage pays for injuries and property damage you cause to other people when you're at fault in an accident. Every state sets a minimum amount you must carry to drive legally, but that minimum is a legal floor set to let you register a car — it isn't a considered estimate of what a serious accident actually costs. Sizing your liability limits well means starting from your own exposure, not from the number your state happens to require.

How liability limits are structured

Liability coverage is typically written as three numbers, often shown as something like 100/300/100:

• Bodily injury per person — the maximum paid for one person's injuries in an accident you cause.
• Bodily injury per accident — the maximum paid in total for everyone injured in one accident, regardless of how many people.
• Property damage per accident — the maximum paid for damage to other people's vehicles or property.

State minimums for each of these vary widely and are set by state law — check your own state's department of insurance for the exact figures, since they differ substantially from state to state and some states have raised theirs in recent years.

Why the minimum is often not enough

State minimum limits were generally set decades ago and, in many states, haven't kept pace with the cost of vehicle repairs or medical care. A single serious injury claim, or an accident involving multiple vehicles, can easily exceed low state minimums in medical costs and vehicle damage alone. If a judgment against you exceeds your liability limits, you are personally responsible for the difference — a court can pursue your other assets and future income to satisfy it, which is the real financial exposure liability coverage is meant to protect against.

A framework for sizing your limits

Rather than picking a number that feels reasonable, work from what you actually have to lose and what a realistic serious accident could cost:

• Add up your assets — savings, home equity, investments — since those are what's at risk in a lawsuit beyond your policy limits.
• Consider your income and career stage, since a judgment can also attach to future wages in many states.
• Think about where and how much you drive — more time on the road, denser traffic, and higher-value vehicles around you all raise the odds and cost of a severe accident.
• If you carry an umbrella policy or are considering one, your auto liability limits typically need to meet a minimum underlying threshold — our guide on umbrella insurance covers how that works.

A common approach among people who've thought this through is to carry limits at least equal to their net worth, on the logic that a limit lower than what you could lose in a lawsuit leaves the difference exposed regardless of what the state requires.

Don't forget uninsured/underinsured motorist coverage

Liability coverage protects other people from you; it does nothing for you if someone else hits you and doesn't carry enough coverage of their own. Uninsured/underinsured motorist coverage is the piece that protects you in that scenario, and many people size it to match their own liability limits on the reasoning that the risk of being seriously underinsured by someone else is just as real as the risk of causing serious harm yourself.

Putting it into practice

Bumping liability limits up a tier — say from state minimum to 100/300/100 or higher — is usually one of the least expensive ways to add meaningful protection, since liability increases are typically much cheaper per additional dollar of coverage than the base minimum limits. It's worth comparing that cost directly: get a free quote and look at how much a jump in liability limits actually adds to the premium before assuming it's out of reach.

The bottom line: state minimums exist to let you legally drive, not to protect your finances in a serious accident. Size your bodily injury, property damage, and uninsured motorist limits against your actual assets and income, not against the smallest number your state allows.