Choosing liability limits for vehicle insurance

Learn what liability limits mean and how to choose BI/PD and UM/UIM coverage with practical rules and examples.

Last updated February 12, 2026

What liability limits are

Liability coverage helps pay for injuries and property damage you cause to others. Your limits are typically shown as three numbers (for example 100/300/100). The first two are bodily injury per person and per accident, and the third is property damage per accident (format varies by state and company).

How to choose limits

Simple guidance
Many people start at 100/300/100 as a baseline, then go higher if they have more to protect. State minimums are often too low for real-world costs.
Step 1: Know what you are protecting
Add up savings and investments, home equity, and potential wage exposure. Higher assets usually means higher limits.
Step 2: Consider local costs
Medical costs, repair costs, and legal settlements vary by region. Higher-cost areas generally justify higher limits.
Step 3: Avoid “bare minimum” thinking
One serious injury can exceed low limits quickly. The goal is reducing the chance you pay out of pocket after coverage runs out.
Step 4: Consider an umbrella policy
If you want more protection, umbrella coverage may add extra liability on top of auto, often with required minimum auto limits.

UM/UIM basics

Uninsured and underinsured motorist coverage (UM/UIM) can help if you are hit by a driver with no insurance or not enough insurance. Availability and rules vary by state. When possible, many people match UM/UIM to their liability limits.

What to ask
  • Is UM/UIM available in my state and included by default or optional?
  • Can I match UM/UIM limits to my liability limits?
  • Are there stacking rules or exclusions I should know about?

Example limit choices

  • Budget baseline: 50/100/50 (still above many minimums, but can be low in high-cost areas).
  • Common practical baseline: 100/300/100.
  • Higher protection: 250/500/250 (or the closest option your insurer offers).
These are general examples, not financial advice. Your best choice depends on assets, risk tolerance, and your state’s available options.

Putting it together: three simple profiles

One way to sanity-check your limits is to compare yourself loosely to simple example profiles. These are not recommendations, but they show how people sometimes think through tradeoffs.

Profile A: Renter with modest assets
Early-career renter, some savings, no home yet. They might look at something like 50/100/50 or 100/300/100 depending on local costs and budget, then revisit limits as their savings and income grow.
Profile B: Homeowner with family
A household with home equity, retirement accounts, and dependents to support often prefers higher limits such as 100/300/100 or above, and may match UM/UIM to those limits to protect themselves from underinsured drivers.
Profile C: Higher net worth / umbrella user
Someone with significant assets might combine higher auto limits (for example 250/500/250 or similar) with an umbrella policy. Insurers often require certain minimum auto limits before an umbrella will sit on top.

Whatever profile you feel closest to, the key is consistency: pick limits, write them down, and use the same numbers when you request quotes from different companies so the price comparison is meaningful.

Next steps
Use the estimator for a quick range, then get real quotes from 3 to 5 providers using identical settings. If you want us to add a guide topic, contact us.