How much car insurance do I need?
Buy liability limits well above your state minimum, then add collision and comprehensive only if you couldn't replace the car yourself.
New to this?
Car insurance pays for damage and injuries from a crash. The required part, liability, pays for harm you cause to other people and their property. Optional parts pay to fix your own car. Almost every state requires drivers to carry some coverage, and lenders require more if you have a car loan or lease.
Read first
Myth
The state minimum is all I need. That's what the law says.
Truth
The minimum is the least you can legally carry. In the example, a crash with $92,000 in damage leaves Sam owing $42,000 above his low limits. Higher limits often cost little more.
Worth memorizing
- 1
Liability pays for harm you cause.
Anything above your limits can be your bill. In the example, low limits leave Sam owing $42,000 after one crash.
- 2
Collision and comprehensive fix your car.
Collision covers crashes. Comprehensive covers theft, fire, weather and vandalism. A lender usually requires both until the loan is paid.
- 3
State minimums vary and are often low.
Each state sets its own required coverage. Check your state insurance department, then buy more liability than the minimum.
Here's where I'd spend and where I'd save. I'd buy high liability limits and uninsured motorist coverage, because those protect against the bills I could never pay. I'd save by raising my collision deductible to what my emergency fund can cover.
Do this today
Find your policy's declarations page and write down your liability limits and deductibles. Then ask your insurer for a quote at 100/300/100 liability with a deductible your emergency fund can cover, and compare the yearly difference.
Practice
1 of 3
Which coverage pays for the other driver's injuries when you cause a crash?
Bodily injury liability pays for injuries you cause to other people. Collision and comprehensive cover your own car.
2 of 3
Your property damage limit is $25,000. You total a car worth $40,000. How much might you owe yourself?
$40,000 − $25,000 = $15,000. Anything above your limit can be your bill.
3 of 3
Which coverage pays when hail damages your parked car?
Comprehensive covers damage that isn't a collision, including weather, fire, theft and vandalism.
Tips
Raise liability before anything else
Ask for a quote at higher limits, such as 100/300/100. The price difference over the minimum is often small compared with the protection.
Match deductibles to your savings
A higher collision deductible lowers your premium. Pick one you could pay from your emergency fund tomorrow.
Drop collision on an old car
If the car is worth only a few thousand dollars, collision may cost more than it could ever pay out. Compare a year of collision premium with the car's value.
Shop every year or two
Get at least three quotes for the same limits and deductibles. Prices for the same driver and car can differ a lot between insurers.
A worked example: when the state minimum runs out
Sam carries an example 25/50/25 policy. He runs a red light and hits one driver. Her medical bills come to $60,000 and her car costs $32,000 to replace.
- For one injured person, the policy pays at most $25,000. $60,000 − $25,000 = $35,000 is left over.
- For property, it pays at most $25,000. $32,000 − $25,000 = $7,000 is left over. Together, $35,000 + $7,000 = $42,000 could be Sam's bill.
- With 100/300/100 limits, the policy would cover both the $60,000 and the $32,000, and Sam would owe nothing above his limits.
- Her medical bills$60,000
- Policy pays (per person limit)−$25,000
- Injury bill left=$35,000
- Her car$32,000
- Policy pays (property limit)−$25,000
- Car bill left=$7,000
- Injury bill left$35,000
- Car bill left+$7,000
- Sam could owe=$42,000
Common mistakes
Buying only the state minimum
Minimum limits can be used up by one hospital stay or one newer car. The extra premium for higher limits is usually small next to what you could owe.
Choosing a deductible you can't pay
A $2,000 deductible saves premium only if you have $2,000 ready. Otherwise the car sits in the shop or the repair goes on a credit card.
Letting coverage lapse
A gap in coverage can mean fines or a suspended license, and insurers often charge more when you buy again. Set premiums on autopay.
Going deeper
Carry at least your state's required liability coverage, and usually much more, because you owe anything above your limits after a crash you cause. Add collision and comprehensive if you couldn't pay to repair or replace your car yourself.
Liability is the core coverage
Bodily injury liability pays for other people's injuries when you are at fault. Property damage liability pays for their car or property. Limits are written as three numbers, like 50/100/50, in thousands of dollars.
You owe what the policy doesn't pay
If a crash you cause costs more than your limits, the injured person can come after you for the rest. Higher limits protect your savings and your future paychecks.
Your own car needs separate coverage
Collision pays when your car hits something. Comprehensive pays for almost everything else, including theft, fire, severe weather, floods and vandalism. Both have a deductible.
Uninsured motorist coverage protects you
It pays for your injuries when a driver with no insurance, or a hit-and-run driver, hits you. Some states require it. Underinsured coverage helps when the other driver's limits are too low.
The main parts of a policy
Liability coverage pays other people when you cause a crash. Collision pays to repair your car after it hits a car, a pole or a tree. Comprehensive pays for damage that isn't a collision, such as hail, a falling branch, theft or a flood.
Uninsured and underinsured motorist coverage pays your medical bills when someone else causes the crash and can't pay. Some states also require personal injury protection, often called PIP, or medical payments coverage, which pay your own medical costs no matter who was at fault.
How to read liability limits
A policy written 25/50/25 pays up to $25,000 for each injured person, $50,000 for all injuries in one crash and $25,000 for property damage. A 100/300/100 policy pays four to six times as much in each slot.
Medical bills and new cars add up fast. One emergency room visit plus surgery can pass $25,000, and many newer cars cost more than that to replace. When damages pass your limits, the other driver or their insurer can sue you for the difference, and a court can order your wages garnished.
What the law requires
Almost every state requires liability coverage, and each state sets its own minimum limits. A few also require uninsured motorist coverage or PIP. Your state insurance department lists the rules, and those rules change, so check them rather than trusting an old number.
If you have a car loan or lease, the lender will also require collision and comprehensive until the loan is paid off. Driving without required coverage can bring fines, a suspended license and full personal liability for any crash.
When to keep or drop collision
Collision makes sense when the car is worth more than you could replace from savings. On a car worth $3,000, a year of collision premium plus a $1,000 deductible may be close to what the insurer would ever pay you.
A simple test: if a year of collision and comprehensive costs more than about 10% of the car's value, and you have savings to replace it, dropping them is reasonable. Keep liability no matter how old the car is.
What sets your price
NAIC lists the main factors: your driving record, where you live, your age, gender and marital status, how much you drive, your past insurance and the car's make and model. States limit which factors insurers may use, so the list varies.
To pay less without cutting protection, raise your deductibles, ask about discounts for a clean record, bundling with renters insurance or a safe driving course, and compare quotes. Adding a teen to a family policy is generally cheaper than a separate policy, NAIC notes.
Questions people ask
What does full coverage car insurance mean?
It isn't an official term. It usually means liability plus collision and comprehensive. Ask what limits and deductibles a full coverage quote includes, since two quotes with the same name can differ a lot.
Does my car insurance cover a rental car?
Often your liability coverage carries over to a rental, and collision may too. Coverage depends on your policy and state. Call your insurer before you rent so you know whether to buy the rental counter's coverage.
Does car insurance follow the car or the driver?
In general, coverage follows the car, so your policy is usually first in line if a friend borrows it with permission. Rules vary by state and policy, so check before you lend your car.
Should I file a claim for a small accident?
If the damage is only a little above your deductible, paying it yourself can be cheaper, since claims can raise your premium at renewal. Always report injuries or damage to another person's car to your insurer.
Printable worksheet with answer key, free for classrooms. Lesson plan for this unit.
Sources
- NAIC: Auto insurance
- NAIC: Is it time to review your policies?
- NAIC: Insurance departments are your trusted source
Updated October 4, 2026. General education, not personalized financial, tax or legal advice. Figures are examples. Check current rates and limits before you act.
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