An auto insurance policy is not one product. It is a bundle of separate coverages, each with its own job, its own limit, and sometimes its own deductible. When people say they have "full coverage", they usually mean they bought several of these at once. There is no policy actually called full coverage, and the phrase hides more than it explains.
Understanding what each piece does is the difference between assuming you are protected and knowing which coverage responds to a given situation. This guide walks through the standard set.
The two jobs a policy does
Every coverage on an auto policy falls into one of two categories.
Coverage for harm you cause to others. This is liability. It pays other people when you are at fault. It never pays you, and it never repairs your own car. Most states require you to carry some amount of it before you can legally drive.
Coverage for you, your passengers, and your own vehicle. This includes collision, comprehensive, uninsured motorist, personal injury protection, and medical payments. States generally do not require most of these, though there are exceptions, and a lender almost always requires some of them on a financed vehicle.
Keeping that split in mind makes the rest of the policy much easier to read.
Bodily injury and property damage liability
Bodily injury liability responds when you injure someone else. It can pay their medical treatment, their lost income, and in a lawsuit it typically pays your legal defense costs as well. Defense costs are usually paid in addition to your limit rather than out of it, though the policy language controls this and it varies.
Property damage liability responds when you damage someone else's property. That usually means their vehicle, but it also covers a fence, a mailbox, a storefront, or a utility pole.
Both are subject to the policy limits you selected, and neither carries a deductible. Once your limit is exhausted, anything above it is generally your personal responsibility, which is the main argument for carrying more than your state's minimum.
How to read split limits
Liability limits are usually written as three numbers separated by slashes, and the
notation confuses almost everyone the first time they see it. A policy written as
25/50/25 means:
| Number | What it caps | Amount |
|---|---|---|
| First | Bodily injury, per person | $25,000 |
| Second | Bodily injury, per accident, all people combined | $50,000 |
| Third | Property damage, per accident | $25,000 |
The figures are in thousands. So in that example, one injured person can recover up to $25,000, everyone injured in that one crash can recover up to $50,000 combined, and property damage caps at $25,000 for the accident.
Some policies instead use a combined single limit, which is one number covering bodily injury and property damage together, with no separate per-person cap. It is more flexible when a single claimant has severe injuries.
The example above is illustrative notation, not a recommendation, and it is not any particular state's requirement. Minimum required limits vary by state, and your state's Department of Insurance publishes the current figures.
Collision
Collision coverage pays to repair or replace your own vehicle after it hits another vehicle or an object, or after it rolls over. It applies regardless of who was at fault, which is the part people tend to miss. If another driver is responsible, you can still use your own collision coverage rather than waiting on their insurer, though you pay your deductible up front in that case.
Collision carries a deductible you choose. It is optional in every state, but a lender or lessor will normally require it for as long as there is a loan on the car.
Comprehensive
Comprehensive coverage is formally called "other than collision," which is a more accurate name for it. It responds to damage that is not a crash, including:
- Theft of the vehicle, and often theft of permanently attached parts
- Fire
- Hail, wind, flood and falling objects
- Vandalism
- Glass breakage
- Hitting an animal, including a deer
That last one catches people out every year. A deer strike is a comprehensive claim, not a collision claim, even though it certainly feels like a collision. Swerving and hitting a tree to avoid the deer, on the other hand, is usually collision.
Comprehensive carries its own deductible, separate from your collision deductible. Some states and some insurers offer glass coverage with a reduced or waived deductible, but availability varies.
Uninsured and underinsured motorist
This coverage steps in when the at-fault driver has no insurance, does not have enough of it, or cannot be identified after a hit and run. Because roughly one in seven drivers was uninsured nationally as of the Insurance Research Council's 2023 estimate, this is not an edge case.
It is mandatory in about twenty states plus the District of Columbia, and in many other states insurers are required to offer it and you must decline it in writing. The rules differ significantly from state to state.
Our guide to uninsured and underinsured motorist coverage covers how the two versions work and what to verify with your state.
Personal injury protection and medical payments
Both of these pay for injuries to you and your passengers, no matter who caused the crash. They differ in scope and in where they are available.
Personal injury protection (PIP) is the broader of the two. Depending on the state, it can cover medical treatment, a portion of lost wages, replacement services such as childcare or housekeeping while you recover, and funeral expenses. PIP is the centerpiece of no-fault systems, and which states are no-fault, along with the thresholds for stepping outside that system to sue, varies by state.
Medical payments (MedPay) is narrower. It generally covers medical and funeral expenses only, with no wage replacement, and it usually comes in smaller limits.
Whether you get PIP, MedPay, both, or neither depends heavily on where you live. Some states mandate PIP, some mandate MedPay, some require insurers to offer one or the other, and some leave it entirely optional. This is a question for your state's Department of Insurance or a licensed agent in your state.
Optional coverages worth knowing about
These are add-ons rather than core coverages, and availability varies by insurer.
- Gap coverage pays the difference between what you owe on a loan or lease and what the vehicle was actually worth when it was totaled. It matters most in the early years of a loan, when the balance can exceed the vehicle's value.
- Rental reimbursement pays toward a rental while your car is being repaired after a covered claim. It is usually a daily amount with an overall cap.
- Roadside assistance covers towing, jump starts, lockouts and flat tires. Check whether you already have this through an auto club or the vehicle manufacturer before buying it twice.
- Custom equipment coverage insures aftermarket additions that the standard policy limits or excludes.
Required, versus required by your lender
These are two different things and they are easy to conflate.
Your state sets minimum liability requirements, and may require PIP, MedPay, or uninsured motorist coverage depending on where you live. New Hampshire is the frequently cited exception to compulsory liability, and even there a driver has to meet financial responsibility rules another way.
Your lender or lessor requires physical damage coverage, meaning collision and comprehensive, because the vehicle is their collateral. They typically also set a maximum deductible. This requirement lasts as long as the loan does, and it exists whether or not your state cares.
If coverage lapses on a financed vehicle, the lender may buy force-placed coverage and bill you for it. That coverage protects their interest in the car, not yours.
What to do with this
Pull out your declarations page, which is the summary sheet your insurer sends at each renewal. Every coverage you actually have is listed there with its limit and deductible. Anything not on that page is not on your policy, regardless of what you assumed.
Then check two things: whether your liability limits still make sense for what you have to protect, and whether the coverages you are paying for still match the vehicles you actually own.
Related reading: how car insurance deductibles work, rental cars and borrowed cars, and how insurers set your rate.
Coverage terms, availability and exclusions vary by insurer, by policy and by state, and your policy documents control in every case. For guidance on your own situation, speak with a licensed agent or your state's Department of Insurance. If you want to start the process, you can request auto insurance quotes and get connected with licensed providers who cover your area.