How much liability coverage do you need?

Carry enough liability coverage to protect what you could lose in a lawsuit: your savings, home equity, other assets and future wages. For most drivers with any assets or steady income, that means well above the state minimum; 100/300/100 is a common starting point, and people with more to protect often go to 250/500/100 plus an umbrella policy. The right number for you comes from a short inventory and three quotes, not a rule of thumb.

Why the minimum is a floor, not an answer

State minimums tell you what is legal, not what is safe. A minimum such as 25/50/25 pays at most $25,000 to one injured person. A single emergency room visit, surgery and a few months of lost wages can exceed that, and anything above your liability limits can be pursued against you personally. Check your state's figure in minimum car insurance requirements by state.

Higher limits also change how claims get resolved. When damages clearly exceed your limits, the injured person's lawyer may send a policy limits demand, offering to settle for your full limit. With low limits, there may be nothing left to protect you once that money is paid.

A five-step method

1. Add up what a judgment could reach. List savings and investment accounts outside retirement plans, home equity, other real estate, vehicles and valuables. Retirement accounts and a portion of home equity are protected from creditors in many states, but the rules vary, so treat them conservatively.
2. Consider your income. If a judgment exceeds your assets, many states allow part of your wages to be garnished. A high or growing income is a reason to carry more even if you have few assets today.
3. Look at your risk factors. A teen or newly licensed driver in the household, long daily commutes, frequent highway driving, or regularly carrying passengers all raise the chance of a serious claim.
4. Price three levels. Ask for quotes with the same deductibles and coverages at three liability levels, for example your state minimum, 100/300/100, and 250/500/100. The car insurance quote comparison worksheet keeps them side by side.
5. Decide on an umbrella. If your total exposure is above what the auto policy can reasonably reach, an umbrella policy adds $1 million or more above your auto limits. See umbrella insurance: liability protection above your auto policy.

The How much car insurance do I need? walks through the same steps with your numbers.

Starting points by situation

These are starting points for discussion with an agent, not rules.

A worked example

This example is hypothetical. Dana owns a condo with $90,000 of equity, has $40,000 in a brokerage account and earns $85,000 a year. She currently carries her state's 25/50/25 minimum.

She runs a stop sign and seriously injures a cyclist. The cyclist's medical bills, lost income and pain and suffering are valued at $180,000.

• With 25/50/25, her insurer pays $25,000. $155,000 is uncovered, enough to consume her brokerage account and much of her condo equity, with the rest potentially collected from her wages.
• With 100/300/100, her insurer pays $100,000. $80,000 is uncovered. Better, but still a real loss.
• With 250/500/100, her insurer pays the full $180,000.

When Dana prices the three options, the cost difference between the minimum and 250/500/100 is the number she weighs against that exposure. For many drivers it is a smaller share of the total premium than they expect, because collision, comprehensive and the driver's own risk profile often drive most of the bill.

Do not forget the other side of the policy

Your liability limits protect other people from you. Underinsured motorist coverage protects you from drivers who carry only the minimum. If you raise your liability limits, consider raising uninsured and underinsured motorist limits to match; some states require insurers to offer matching limits. See uninsured and underinsured motorist coverage explained.

Property damage limits deserve a second look too. A $25,000 limit can be used up by one newer vehicle with sensors in the bumpers, and a multi-car crash or damage to a building can go far higher. A $100,000 property damage limit is a common choice when people raise their bodily injury limits.

Why higher limits cost less than you might expect

Insurers price liability coverage in layers. Most claims are small, so the first $25,000 or $50,000 of coverage is the layer most likely to be used and carries most of the cost. Each additional layer above it is used less often, so raising limits from 25/50/25 to 100/300/100 usually adds far less than four times the price. The exact difference depends on your insurer, state and driving record, which is why step 4 above asks for real quotes rather than estimates.

The same logic explains why an umbrella policy can add $1 million of protection for a fraction of the cost of the underlying auto policy: the umbrella only pays after your auto limits are exhausted, which is rare.

Signs your limits are too low

• Your liability limits are lower than the value of what you own.
• You added a teen driver and did not change your limits. See adding a teen driver to your car insurance.
• You bought a home, got a raise or received an inheritance since you last reviewed your policy.
• Your uninsured motorist limits are lower than your liability limits.
• An umbrella insurer told you your auto limits are below its required underlying limits.

Key takeaways

• Choose liability limits to protect your assets and income, not to meet the legal minimum.
• 100/300/100 is a common starting point; 250/500/100 plus an umbrella suits people with significant assets.
• Get quotes at three liability levels with everything else held constant to see the real price of more protection.
• Match uninsured and underinsured motorist limits to your liability limits when you can.
• Review limits after any big life change: a home purchase, a raise or a new teen driver.