The two words tell you almost nothing about what they do, which is why people buy the wrong combination or claim under the wrong one. The actual dividing line is simple once stated plainly.
Collision pays when your car hits something — another vehicle, a wall, a pothole — or rolls over. Comprehensive is legally "other than collision" and covers theft, fire, hail, flood, vandalism, falling objects and animal strikes. Neither pays for your injuries or the other party's car. Both cap out at your car's actual cash value, which is what makes them poor value on an old vehicle.
The dividing line
| Event | Which coverage | Note |
|---|---|---|
| Hitting another car | Collision | Regardless of fault |
| Hitting a wall, kerb or pothole | Collision | |
| Rolling the car over | Collision | Even with nothing else involved |
| Hitting a deer or other animal | Comprehensive | The classic surprise |
| Theft of the car | Comprehensive | |
| Fire | Comprehensive | |
| Hail, flood, storm damage | Comprehensive | |
| Falling tree or object | Comprehensive | |
| Vandalism, broken windows | Comprehensive | |
| Cracked windscreen | Comprehensive | Often a reduced or zero deductible |
| Someone hits you and is at fault | Their liability cover | Yours only if they are uninsured |
| Your injuries | Neither | MedPay, PIP, or health insurance |
| The other car you damaged | Neither | Your liability coverage |
That last pair matters most. People carrying "full coverage" often assume it means everything. It does not — comprehensive and collision only ever pay for your own vehicle.
Why an animal strike is comprehensive
It is the single most common point of confusion, and the reason is historical rather than logical: comprehensive is defined in policy language as loss "other than by collision," and insurers have long classified animal strikes there.
It works in your favour. Comprehensive claims are usually treated more gently in rating than at-fault collision claims, because they are not read as a signal about your driving.
Both coverages pay actual cash value minus your deductible — what the car is worth today, not what you paid or what a replacement costs. Take a car worth about $3,000 with a $1,000 deductible: the most any claim can ever return is roughly $2,000. If comprehensive and collision cost $600 a year, you are spending $1,200 over two years to protect a maximum $2,000 payout that may never happen. There is no universal cutoff — but the calculation is yours to do, and it is the honest way to decide rather than a rule of thumb about car age.
What "full coverage" actually means
Nothing. It is not a legal or industry term, and no policy is titled that.
In common use it means liability plus comprehensive plus collision. It does not imply:
- Medical coverage for you or your passengers
- Rental car reimbursement while yours is repaired
- Roadside assistance
- Gap coverage, which pays the difference when you owe more on a loan than the car is worth
- Coverage for personal items stolen from inside the car — that is usually renters or home insurance
Each of those is a separate line on the policy. If a seller says "you're fully covered," ask which of those are actually on it.
Deductibles apply separately
Comprehensive and collision usually carry their own deductibles, and they can be set at different amounts. Many people run a lower comprehensive deductible than collision, on the reasoning that hail, theft and glass are largely outside their control while collisions are partly within it.
Whether that suits you is arithmetic again — see what a deductible really costs you.
When to claim and when not to
A claim below or near your deductible returns little and can still affect your rating. Before filing:
- Get a repair estimate first. If it is close to the deductible, paying directly is often better.
- Check how your insurer treats comprehensive claims. Many rate them more leniently than collision.
- Ask about glass specifically. Several states require a reduced or waived deductible for windscreen repair, which can make a chip repair free.
This is general information, not financial advice — see our disclaimer.
Frequently asked questions
What is the difference in one sentence?
Collision covers your car when it hits something or rolls over; comprehensive covers almost everything else that can happen to it — theft, fire, hail, flood, vandalism, falling objects and animal strikes.
Which one covers hitting a deer?
Comprehensive, not collision, in almost every policy. It surprises people because it feels like a collision, but insurers classify animal strikes as an "other than collision" loss.
Do either of them pay for my injuries?
No. Injuries come from medical payments coverage, personal injury protection, or health insurance depending on your state and policy. Comprehensive and collision only ever pay for the vehicle.
Do I need them if my car is old?
The payout is capped at the car's actual cash value minus the deductible, so on a low-value car the coverage can cost more over a few years than it could ever pay out. That is arithmetic you can do yourself.
Is a cracked windscreen comprehensive?
Yes, glass damage falls under comprehensive. Several states require insurers to offer glass coverage with no deductible or a reduced one, so it is worth asking rather than assuming.
Sources
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