What is the difference between liability and collision insurance?

Liability pays other people for damage and injuries you cause. Collision pays to repair your own vehicle after an impact. They never overlap: liability will not repair your car under any circumstances, and collision will not pay anyone else.

What does liability insurance actually cover?

Two things. Bodily injury liability pays other people's medical costs and related losses when you are at fault. Property damage liability pays to repair or replace their vehicle or property. Neither pays for you or your car.

Is comprehensive the same as full coverage?

No. Full coverage is a marketing phrase, not a product. It usually means liability plus collision plus comprehensive together. Comprehensive on its own is only the non-collision piece.

When should I drop to liability only?

When the annual cost of collision and comprehensive approaches roughly a tenth of what the car would actually pay out. At that point you are paying a meaningful fraction of the car's value each year to insure it, and self-insuring becomes reasonable.

Does comprehensive cover hitting a deer?

Yes. Animal strikes fall under comprehensive, not collision, which surprises people because it involves an impact. It is generally the better outcome, since comprehensive deductibles are often lower and some carriers treat these claims more favourably.

Does collision cover a single-vehicle crash?

Yes. Sliding into a guardrail on an icy road, hitting a kerb, or backing into a post are all collision claims. Fault does not matter for collision; it pays for impact damage to your car regardless.

Do I need collision on a financed car?

Your lender will require both collision and comprehensive for the life of the loan. That is a loan condition, not an Oregon law, but it is not negotiable and lapsing lets the lender buy force-placed coverage and bill you for it.

Liability vs Collision vs Comprehensive Coverage

Three coverages, three different jobs, and almost every coverage dispute comes from someone assuming one of them does another's work.

The clean mental model: liability protects other people from you. Collision and comprehensive protect your car from the world. Oregon only makes the first one mandatory.

Liability: pays other people, never you

Liability is the coverage the state actually requires, and it exists to make other people whole when you cause harm.

It splits into two parts:

Bodily injury liability pays other people's medical costs, lost income and related losses when you are at fault. Oregon requires $25,000 per person and $50,000 per crash.
Property damage liability pays to repair or replace their vehicle or property. Oregon requires $20,000 per crash.

Written together, that is the shorthand 25/50/20.

What liability does not do, ever, under any circumstances: pay to repair your car, or pay your own medical bills. People carrying liability only sometimes discover this after a crash they caused, and it is not a technicality or a loophole. It is the whole design.

Where Oregon's minimum leaves you. $20,000 of property damage is the entire legal requirement for damage you cause to someone else's vehicle. A single late-model SUV can exceed that before anyone is injured. Everything past your limit comes from you: your savings, your wages, your assets. Raising liability limits is comparatively cheap, because severe claims are rare, and it is the best value in the whole policy.

Collision: pays for impacts, regardless of fault

Collision repairs your own vehicle after an impact, minus your deductible, and it does not care who caused it.

It covers:

Hitting another vehicle, whoever was at fault
Being hit by another vehicle
Single-vehicle crashes: a guardrail, a kerb, a post, a tree
Rolling the vehicle
Potholes, in most policies

It is optional under Oregon law and mandatory under every car loan. Lenders require it because the vehicle is their security.

The deductible is the lever. Moving from $500 to $1,000 lowers the premium and raises what you pay when you claim. It is a genuine trade rather than a discount, and it only makes sense if you could write the larger cheque next week without difficulty.

Comprehensive: pays for everything that is not a collision

Comprehensive is the catch-all for damage that happens to a car without it running into something.

It covers:

Theft of the vehicle, and theft of parts
Vandalism and break-in damage
Fire
Flood and water damage
Hail and storm damage
Falling objects, including tree limbs in a winter windstorm
Animal strikes, including deer
Glass damage, often with a separate and lower deductible

Two of those matter disproportionately in Oregon. Catalytic converter theft has been a sustained problem across the Portland metro, and it is a comprehensive claim rather than a collision one. Winter windstorms bring branches down on parked cars across the whole valley, and that is comprehensive too.

The animal strike quirk. Hitting a deer feels like a collision and is classified as comprehensive. This generally works in your favour, because comprehensive deductibles are frequently lower. It matters on rural roads in Clackamas and Yamhill counties, where wildlife collisions are routine rather than exotic.

Side by side

Situation	Liability	Collision	Comprehensive
You rear-end someone	Pays their car and injuries	Pays your car	No
Someone rear-ends you	No	Pays your car, then subrogates	No
You slide into a guardrail on ice	No	Pays your car	No
Your car is stolen	No	No	Pays
A branch falls on your parked car	No	No	Pays
Your catalytic converter is cut off	No	No	Pays
You hit a deer on OR 224	No	No	Pays
Your car floods in winter rain	No	No	Pays
You are injured in a crash you caused	No	No	No, this is PIP

That last row catches people out. Neither collision nor comprehensive pays your medical bills. In Oregon that is personal injury protection, which is mandatory at $15,000 per person and pays regardless of fault.

"Full coverage" is not a product

There is no policy called full coverage. It is shorthand, usually meaning liability plus collision plus comprehensive, and it is not full in any meaningful sense. It does not include rental reimbursement, roadside assistance, or gap coverage unless you add them.

Be specific when you shop. Ask for limits and deductibles by name rather than asking for full coverage, because two "full coverage" quotes can be very different policies.

When to drop collision and comprehensive

The standard rule of thumb: when the combined annual premium for collision and comprehensive approaches roughly ten percent of the car's actual cash value, the coverage stops being good value.

Two refinements worth applying:

Drop collision before comprehensive. Collision is the more expensive of the two and covers the risk you have most control over. Comprehensive is cheap and covers theft and weather, which do not care how old your car is. In a metro with a real vehicle theft problem and real winter storms, keeping comprehensive on an older car often still makes sense.

Consider whether you could actually replace the car. The rule assumes a total loss is an inconvenience you can absorb. If losing the car would mean losing your ability to get to work, the arithmetic changes.

What to actually carry

For most Oregon drivers, a defensible position looks like:

Liability well above the state minimum. This is where the money should go first.
Uninsured motorist matching your liability limits, which Oregon defaults you into unless you sign an election to reduce it. With roughly one driver in seven estimated to be uninsured, this is not theoretical.
Collision and comprehensive while the car is financed or while it is worth enough to matter, with a deductible you could genuinely pay next week.
Gap coverage if you are underwater on the loan.

The instinct is to cut liability and buy a lower deductible. That is backwards. A lower deductible saves you a few hundred dollars in an event that is annoying. Higher liability limits save you from an event that is ruinous.

Liability vs collision vs comprehensive: what each one pays