Your limits should cover what you could lose if you cause an accident

Car insurance limits are the maximum amount your policy will pay out for a claim. You choose these limits when you buy a policy, and they directly affect your monthly premium — higher limits cost more. The question is not what the law requires (though most states set minimums), but what would actually protect your finances if you caused a serious accident.

Most people underestimate how much damage a single accident can cause. A crash that injures multiple people, damages property, or totals an expensive vehicle can easily exceed $100,000 in liability costs. If your limits are lower than the actual damages, you are personally responsible for the difference — which can mean wage garnishment, asset seizure, or a judgment against you for years.

The right limits depend on your assets, your income, and the risk you pose on the road. A 19-year-old driving a used sedan in a city has different exposure than a 45-year-old with a house and savings driving on highways. This section explains how to think about that trade-off.

Key Takeaways

  • Liability limits should be high enough to cover your assets plus several years of income, because anything above your policy limit comes out of your own pocket.
  • Most states require minimum liability limits between $15,000 and $30,000 per person, but these minimums leave you exposed to personal liability for serious accidents.
  • Collision and comprehensive coverage protect your own vehicle and are optional, but required by lenders if you have a car loan or lease.
  • Uninsured and underinsured motorist coverage protects you when the other driver cannot pay, and should match or exceed your liability limits.
  • Increasing your deductible (the amount you pay out of pocket) lowers your premium, but only if you can actually afford to pay it after an accident.

Liability limits: the most important number on your policy

Liability coverage pays for injuries and property damage you cause to other people. It has two parts: per-person limits and per-accident limits. A policy labeled "100/300/100" means $100,000 per person for injuries, $300,000 total per accident for injuries, and $100,000 for property damage.

Your state sets a legal minimum, but that minimum is almost always too low. If you live in a state with a $25,000 minimum and you cause an accident that injures three people with $50,000 in medical bills each, your policy pays $25,000 per person ($75,000 total), and you owe the remaining $75,000 out of your own money. That debt does not disappear — creditors can garnish your wages or place a lien on your home.

A practical rule: your liability limits should be at least equal to your net worth plus three to five years of income. If you own a $300,000 home, have $50,000 in savings, and earn $60,000 a year, you should carry at least $500,000 in liability coverage. If you have little to no assets, $100,000 to $150,000 is a reasonable floor. If you have substantial wealth, $500,000 to $1,000,000 is more appropriate.

The cost difference between a $100,000 limit and a $300,000 limit is usually $10 to $20 per month. Between $300,000 and $500,000, the increase is often $5 to $10 more. That small premium difference can save you from financial ruin.

Collision and comprehensive: protecting your own vehicle

Collision coverage pays to repair or replace your car if you hit something or something hits you — another vehicle, a tree, a guardrail. Comprehensive coverage pays for damage from events you did not cause: theft, vandalism, weather, hitting an animal, or a falling object.

If you own your car outright, these are optional. If you have a loan or lease, your lender requires them. When you do carry them, you choose a deductible — typically $250, $500, $1,000, or higher. You pay the deductible out of pocket; your insurance pays the rest.

The math is straightforward: if your car is worth $8,000 and you carry a $1,000 deductible, the most collision coverage will ever pay you is $7,000. If your car is worth $3,000, paying for collision coverage at all may not make financial sense — the premium over several years could exceed what the coverage would pay out. Many people drop collision and comprehensive once their car is old enough that the value is low.

One exception: if you live in an area with high theft, severe weather, or vandalism, comprehensive coverage is worth keeping even on an older car. If you live somewhere with frequent hail or you park on the street in a city with high break-in rates, the risk is real.

Uninsured and underinsured motorist coverage: when the other driver cannot pay

Uninsured motorist (UM) coverage pays your medical bills and lost wages if you are hit by a driver with no insurance. Underinsured motorist (UIM) coverage covers you when the other driver has insurance, but their limits are too low to pay your full damages.

About 13% of drivers nationwide carry no insurance, and that percentage is higher in some states and regions. If an uninsured driver causes an accident that injures you, your own UM coverage is what pays your medical bills — not the other driver's policy, because they do not have one. Without UM coverage, you would have to sue the driver personally, which is often fruitless because they have no assets.

Your UM and UIM limits should match your liability limits. If you carry $300,000 in liability, carry $300,000 in UM/UIM. The premium difference is small, and it protects you against the same financial exposure you are protecting others against.

Some states allow you to reject UM/UIM coverage, but most require you to actively opt out in writing. Do not let this coverage lapse by accident.

Medical payments coverage: a small safety net

Medical payments coverage (sometimes called MedPay) pays your medical bills up to a chosen limit — typically $1,000 to $5,000 — regardless of who caused the accident. You do not have to prove fault; the coverage pays automatically.

This is optional in most states and relatively inexpensive — often $5 to $15 per month for $5,000 in coverage. It covers you, your passengers, and anyone else in your vehicle. It pays for ambulance, emergency room, surgery, dental work from the accident, and sometimes physical therapy.

The main value is speed: MedPay pays quickly while you are still in treatment, whereas a liability claim (yours or the other driver's) can take months to settle. If you have good health insurance with a low deductible, MedPay is less critical. If you have a high-deductible health plan or no health insurance, it is worth adding.

How your deductible affects your premium

Your deductible is the amount you pay out of pocket before your insurance kicks in. It applies to collision, comprehensive, and sometimes other coverages — not to liability.

A higher deductible lowers your premium. Moving from a $250 deductible to a $1,000 deductible might save you $15 to $30 per month. Over a year, that is $180 to $360. But if you cause an accident and file a claim, you will pay $1,000 instead of $250.

Choose a deductible you can actually afford to pay if you need to. If you have $500 in savings and choose a $1,000 deductible, you cannot pay it if an accident happens — you would have to go into debt or let the car sit unrepaired. A $250 or $500 deductible makes more sense. If you have an emergency fund of $5,000 or more, a $1,000 deductible is reasonable and saves money over time.

State minimums versus what you actually need

Every state sets a legal minimum for liability coverage. These minimums vary widely: some states require as little as $15,000 per person, while others require $30,000 or more. A few states allow drivers to post a bond or prove financial responsibility instead of buying insurance.

State minimums exist to ensure that hit-and-run victims and accident victims have some recourse. They do not exist to protect you from financial ruin — they protect other people from you. If you cause an accident that exceeds your state's minimum limits, you are personally liable for the rest.

Insurance companies often sell policies at or near the state minimum because that is what the law requires. But carrying only the minimum is a financial risk most people should not take. The premium difference between minimum coverage and reasonable coverage is usually $20 to $40 per month — less than the cost of a single accident's consequences.

Special situations: rideshare, commercial use, and high-risk drivers

If you drive for Uber, Lyft, or another rideshare service, your personal auto policy does not cover you while you are working. Rideshare companies provide some coverage, but it has gaps. You need a rideshare endorsement or a commercial auto policy to be fully covered. Your personal liability limits should be higher than for personal driving — $500,000 or more is reasonable.

If you use your car for business (deliveries, client visits, anything beyond commuting), you need commercial auto coverage or a business endorsement. Personal policies explicitly exclude business use.

If you have a poor driving record, multiple accidents, or violations, insurers may require higher limits or refuse to cover you at all. Some will offer coverage only at higher premiums. In these cases, carrying higher limits is both required and wise — you pose a higher risk, and the financial consequences of an accident are more likely.

Frequently Asked Questions

What is the difference between per-person and per-accident liability limits?

Per-person limits cap what your insurance pays to any single injured person. Per-accident limits cap the total payout for all injuries in one accident. If you have 100/300 limits and injure three people with $150,000 in damages each, your policy pays $100,000 to each person (the per-person cap) for a total of $300,000 (the per-accident cap). You owe the remaining $150,000.

Do I need collision coverage if I have an older car?

If you own the car outright and it is worth less than $5,000, collision coverage often costs more over time than the damage it would pay. Calculate: if your premium is $80 per month and your car is worth $3,000, you would need to go 37 months without a claim just to break even. If your car is newer or you cannot afford to replace it out of pocket, keep collision coverage.

What happens if I cause an accident and my limits are too low?

Your insurance pays up to your policy limit, and you are personally responsible for the rest. The injured party can sue you, obtain a judgment, and garnish your wages or place a lien on your home. This debt can follow you for years. That is why carrying limits higher than your state's minimum is important.

Should I carry the same UM/UIM limits as my liability limits?

Yes. You are protecting yourself against the same financial exposure — serious injury or property damage. If you carry $300,000 in liability, carry $300,000 in UM/UIM. The premium difference is small, and it ensures you are protected whether you cause an accident or someone else does.

Can I lower my premium by choosing higher deductibles?

Yes, but only if you can afford to pay the deductible. A $1,000 deductible saves money each month, but if you cannot pay $1,000 after an accident, you cannot use your coverage. Choose a deductible equal to what you have in an emergency fund or savings.