Auto Insurance: Read the Coverage, Limits and Deductibles Before You Buy

Auto insurance is a collection of coverages, not one promise to pay every car-related bill. Liability protects you against covered claims for harm you cause to others. Collision and comprehensive address different kinds of damage to your own vehicle. Other coverages can help with injuries, uninsured drivers or temporary transportation.

When comparing quotes, first match what is covered, the payment limits and your share of a claim. Then compare price. “Full coverage” is not a standardized policy: the National Association of Insurance Commissioners (NAIC) warns that policies consist of separate coverages.

This guide concerns U.S. personal auto insurance. State requirements and the policy’s wording control the details.

Match each coverage to the bill it could pay

Coverage	What it generally addresses	What to check in a quote
Bodily injury and property damage liability	Injuries to other people and damage to their property for which you are legally responsible	Per-person, per-accident and property damage limits
Collision	Damage to your vehicle from a collision	Deductible and vehicle valuation terms
Comprehensive, also called “other than collision”	Theft and damage from events such as hail, flood, fire or vandalism	Separate deductible, including any special glass terms
Medical payments or personal injury protection (PIP)	Eligible injury expenses for you and passengers; PIP can also cover items such as lost wages	Who qualifies, covered expenses and benefit limits
Uninsured/underinsured motorist	Eligible losses caused by an at-fault driver with no insurance or insufficient coverage	Whether injuries, vehicle damage or both are covered; limits and state-specific conditions
Rental reimbursement	Temporary rental expenses after a covered loss	Daily allowance, total allowance and time limit

These are general descriptions from the NAIC’s auto insurance shopping tool, not a substitute for the policy’s exclusions and conditions. Not every coverage is available or required in every state.

Liability alone does not pay to fix your own car. Comprehensive is not a substitute for collision. For more on non-collision losses, see what comprehensive insurance covers.

Read limits separately from deductibles

A limit caps what the insurer pays under a coverage. A deductible is the portion of a covered claim that remains your responsibility.

For example, liability limits written as 100/300/100 mean:

• $100,000 maximum for bodily injury to one person.
• $300,000 maximum for bodily injury to all people in one accident.
• $100,000 maximum for property damage in one accident.

The per-person limit still applies within the bodily injury total. A large per-accident limit does not eliminate that smaller cap. The NAIC explains this split-limit structure and notes that you can remain responsible for damages above your coverage.

Collision and comprehensive usually have their own deductibles. For a total loss, standard coverage generally pays the vehicle’s actual cash value, subject to the deductible—not automatically the price of a new car or your outstanding loan balance. The Texas Department of Insurance’s auto guide explains how depreciation and a remaining loan can affect the settlement. Ask whether the quote includes any different valuation endorsement or loan-shortfall coverage.

Labeled example: deductible, limit and exclusion

Illustrative assumptions: You cause a covered crash during ordinary personal driving. Your policy has collision with a $1,000 deductible and a $50,000 property damage liability limit with no liability deductible. Your own car has $6,000 in approved covered repairs, below its actual cash value. You owe $58,000 for damage to someone else’s property.

• Your car: Collision would pay $5,000 after the $1,000 deductible.
• The other property: Property damage liability would pay up to $50,000. The remaining $8,000 would be your responsibility, assuming no other applicable coverage.
• Exclusion: Now suppose the crash occurred during paid delivery and this hypothetical policy excludes that activity for both coverages, with no endorsement restoring it. Those calculations would not establish a payable claim. A deductible does not turn an excluded loss into a covered one.

The Texas Department of Insurance’s auto guide illustrates deductible subtraction and warns that many personal policies exclude paid delivery or ride-hailing accidents. Your state and policy may differ. Disclose the actual use and ask for written confirmation of coverage; see personal versus commercial auto insurance.

Put quotes on equal terms

Prepare one coverage specification and use it for each insurer:

1. Keep the inputs consistent. Use the same drivers, vehicles, garaging address, annual mileage and vehicle use. Disclose household drivers and business or delivery activity.
2. Match the coverage numbers. Align liability, medical and uninsured/underinsured motorist limits, plus collision and comprehensive deductibles. Compare rental benefits separately.
3. Compare the same policy period and payment method. A six-month premium is not an annual premium. Ask about installment charges and conditions attached to discounts.
4. Price deductible changes separately. If raising a deductible from $500 to $1,000 saves an illustrative $90 a year, you accept $500 more exposure per applicable claim for that saving. Check whether you could fund it now.
5. Ask what the summary leaves out. Request the relevant exclusions and endorsements, total-loss valuation terms, and repair-parts provisions.

The NAIC shopping tool provides a side-by-side worksheet and recommends obtaining at least three quotes. Three is a practical starting point, not proof that you found the lowest available price.

Before buying, verify your state’s required coverages and any lender or lease requirements. When the policy arrives, compare its declarations page with the quote—but keep the policy form and endorsements with it. The declarations summarize the numbers; the rest of the contract determines when those numbers apply.