Published 2026-09-19 · Last updated 2026-09-19.
What liability covers
Liability limits are often written as three numbers — for example, a per-person bodily injury limit, a per-accident bodily injury limit, and a property damage limit. Higher limits protect your assets better if you cause a serious accident, because anything above your limit can fall to you personally. Choosing only the state minimum keeps cost down in a quote, but it also caps the protection liability gives others — and therefore the protection it gives you against a large claim.
What full coverage adds
Full coverage adds collision and comprehensive to liability. Collision pays for damage to your own car after a crash, regardless of fault, minus your deductible. Comprehensive pays for non-crash damage to your own car — theft, vandalism, fire, weather, hitting an animal — also minus a deductible. Together they mean your own car is covered in many more situations than liability-only allows.
What full coverage does not automatically add matters just as much. It does not automatically include uninsured/underinsured motorist cover, medical payments or personal injury protection, rental reimbursement, or roadside assistance. If you want those, you must select them. Read your declarations page, not the label "full coverage", to know what you actually bought.
Which fits which driver
Liability-only fits best, in general, when your car is worth little enough that you could replace or repair it yourself without hardship, and when no lender or lessor requires collision and comprehensive. If you finance or lease, that choice is usually not yours to make: the lender will require those coverages.
Full coverage fits best, in general, when your car is newer or more valuable, when you could not comfortably absorb a repair or replacement, or when a loan or lease requires it. It also fits when you want protection against theft and weather, not only crashes. Neither choice is "better" in the abstract — the right one depends on car value, loan status, savings, and risk tolerance.
Cost trade-off (general)
Full coverage costs more in a quote than liability-only, because the insurer takes on your car's repair and replacement risk as well as your liability risk. How much more depends on your car, your state, your record, and your deductible, and no figure is stated here. A higher deductible lowers the quote for the physical-damage part but raises what you pay first after a claim, so the cheapest quote is not always the cheapest outcome if you crash.
A useful test: compare the extra quote cost of full coverage against what you would pay yourself to repair or replace your car, and against your savings. If you could not pay that repair without hardship, the extra quote cost buys real protection. If you could, liability-only may be a deliberate, informed choice — not a gamble you took by accident.
ILLUSTRATIVE EXAMPLE — not a policy fact
Two illustrative drivers own identical cars outright. Driver A chooses liability-only and accepts that a crash damaging only their own car would be paid from savings. Driver B chooses full coverage and accepts a higher quote in exchange for collision and comprehensive cover. Neither driver is declared "right" — the example shows the trade-off, not a price — and both drivers check whether uninsured motorist cover is included, since neither liability nor full coverage guarantees it.