Buying car insurance is one of those decisions where the cheapest option and the right option are rarely the same thing. State minimums exist to keep you legal — not to keep you solvent after a multi-car pileup. This guide walks through every coverage type, what the numbers on your policy actually mean, and the limits most drivers should carry.
Disclaimer: This article is educational. It is not personalized advice, and we are not licensed agents. Your ideal coverage depends on your assets, your state, and your risk tolerance — confirm specifics with a licensed professional before you buy.
The Six Coverages on Almost Every Policy
A car insurance policy isn’t one product — it’s a bundle of separate coverages, each doing a different job. Understanding them individually is the key to not over- or under-buying.
- Bodily injury liability — pays for injuries you cause to other people.
- Property damage liability — pays for damage you cause to other people’s property (their car, a fence, a storefront).
- Collision — pays to repair or replace your car after a crash, regardless of fault.
- Comprehensive — pays for non-collision damage to your car: theft, hail, fire, flooding, a deer.
- Uninsured/underinsured motorist (UM/UIM) — pays when the at-fault driver has no insurance or not enough.
- Medical payments / PIP — pays medical bills for you and your passengers, often regardless of fault.
The first two are liability. The next two protect your own vehicle. The last two fill the gaps that the at-fault system leaves behind.
What “100/300/100” Actually Means
Liability limits are written as three numbers. They look cryptic but they’re simple once you decode them:
- The first number is the most your insurer pays for bodily injury to one person (in thousands).
- The second number is the most it pays for bodily injury per accident, across everyone hurt.
- The third number is the most it pays for property damage per accident.
So 100/300/100 means $100,000 per person, $300,000 per accident, and $100,000 in property damage. A state-minimum policy might read 25/50/25 — and a single ER visit plus a totaled late-model SUV can blow through those limits in an afternoon. Once your insurer’s limit is exhausted, the injured party can come after your assets and future wages.
How Much Liability Should You Carry?
A useful rule of thumb: your liability limits should at least cover your net worth. If a court awards damages above your policy limit, your savings, home equity, and garnishable wages are next in line.
- Modest assets, tight budget: 50/100/50 is a meaningful step up from minimums and usually costs only a little more.
- Typical homeowner or household: 100/300/100 is the most commonly recommended baseline.
- Significant assets: Max out auto liability, then add an umbrella policy for $1M+ of additional coverage — umbrellas are remarkably cheap per dollar of protection.
Raising liability limits is one of the best values in all of insurance: the marginal cost of going from minimum to 100/300/100 is often modest, while the protection multiplies several times over.
Do You Still Need Collision and Comprehensive?
Collision and comprehensive (together, “full coverage”) protect your car. Whether they’re worth it depends almost entirely on your car’s value.
- New or financed/leased car: Keep both — your lender will require them, and a total loss would otherwise come out of your pocket.
- Car worth $4,000+: Usually worth keeping, especially if you couldn’t comfortably replace it tomorrow.
- Older car worth a few thousand or less: Run the math. If your annual premium for collision + comprehensive approaches 10% of the car’s value, dropping them and self-insuring often makes sense.
Remember these coverages pay out only up to your car’s actual cash value, minus your deductible. A $500 claim on a car with a $500 deductible nets you nothing.
The Coverage Most People Forget: UM/UIM
Roughly one in seven drivers on the road is uninsured, and many more carry only the legal minimum. Uninsured/underinsured motorist coverage steps in when the at-fault driver can’t cover your injuries. It’s inexpensive, and it’s the coverage that protects you — not the other driver — when someone with a 25/50 policy puts you in the hospital. Match your UM/UIM limits to your liability limits whenever you can.
A Sensible Default for Most Drivers
If you want a starting point and you’ll fine-tune from there:
- 100/300/100 bodily injury and property damage liability.
- Matching UM/UIM at 100/300.
- Collision and comprehensive with a deductible you could pay tomorrow without flinching (often $500–$1,000).
- An umbrella policy if you own a home or have real savings to protect.
The Bottom Line
State minimums keep you legal; they don’t keep you protected. For most drivers, the smartest move is to raise liability to 100/300/100, keep full coverage while the car holds value, and never skip uninsured-motorist protection. Insurance is one of the few purchases where paying a little more up front is what makes it work when you finally need it.