How Much Car Insurance Do I Need? A Plain-English Guide to Setting Your Coverage

Every state sets a floor for how much car insurance you must carry, but that floor was never designed to cover a serious accident. The right amount for you depends on what you own and earn, what you drive, and how much financial risk you are willing to carry yourself.

What "enough" car insurance means

A car insurance policy is a bundle of separate coverages, each with its own limit or deductible. Some pay other people when you cause a crash. Some repair or replace your own car. Some pay your own medical bills or step in when the other driver has too little insurance. Deciding how much you need means deciding each layer.

Enough coverage meets two goals. A single bad accident should not be able to reach your savings, your home, or your future paycheck. And losing your car should not leave you stranded or still paying off a loan on a vehicle you no longer have.

Start with your state's minimum

Nearly every state requires drivers to carry liability insurance, and each one sets its own minimum limits, usually written as three numbers in thousands of dollars. A policy listed as 25/50/25 pays up to $25,000 for one injured person, $50,000 for all injuries in one accident, and $25,000 for property damage you cause. Texas, for example, sets its minimums at 30/60/25, according to the Texas Department of Insurance.

Some states require more than liability. No-fault states require personal injury protection, and some states also require uninsured motorist coverage. Your state insurance department or DMV publishes the exact rules, and the state minimum guide explains what a minimum policy leaves out. Treat the minimum as the legal starting point, not a recommendation. Liability coverage pays nothing toward your own car.

Size liability to what you could lose

Liability is the most important decision on the policy, because it protects everything you already have. If you cause an accident that costs more than your limits, your insurer pays up to the limit and you are personally responsible for the rest. The injured person can sue for the difference, and a court judgment can reach savings, property, and, in many states, future wages. State exemption laws shield some assets, but not all.

That is why many advisers suggest liability limits at least equal to your net worth. A common recommendation for drivers with savings, a home, or steady income is 100/300/100: $100,000 per injured person, $300,000 per accident for injuries, and $100,000 for property damage. The liability cheat sheet matches limits to net worth tier by tier, and what 100/300 means breaks the numbers down further.

If your net worth is higher than the most liability your auto policy offers, consider a personal umbrella policy, which adds a layer of liability protection above your auto and home limits. Insurers generally require certain underlying auto liability limits before they will issue one, so the two decisions go together.

Decide on comprehensive and collision

Collision pays to repair your car after a crash, whoever caused it. Comprehensive covers most other damage, such as theft, fire, hail, flooding, vandalism, and hitting an animal. Together they are often called full coverage, a nickname rather than a defined policy.

If your car is financed or leased, the decision is usually made for you, because lenders and lessors almost always require both. If you owe more than the car is worth, gap insurance covers the difference after a total loss.

If you own the car outright, it becomes simple arithmetic. The most these coverages can ever pay is the car's actual cash value minus your deductible. Weigh that against what they cost each year. As the car ages, the two numbers move closer, and at some point dropping the coverage makes sense, provided you could repair or replace the car yourself. See dropping full coverage on an old car, and choosing a deductible for the middle ground of keeping the coverage with a higher deductible.

Protect yourself from other drivers

Plenty of drivers carry too little insurance or none. Uninsured and underinsured motorist coverage pays for your injuries, and in some states damage to your car, when the at-fault driver cannot. It is usually inexpensive for what it does, and many advisers suggest matching it to your liability limits. The guide on whether you need uninsured motorist coverage explains how the rules differ by state.

Medical payments coverage or personal injury protection, depending on your state, pays medical bills for you and your passengers regardless of fault. If your health plan has a high deductible, this layer can fill a real gap.

Optional extras worth a look

• Rental reimbursement pays for a rental while your car is repaired after a covered claim. It matters most in a one-car household.
• Roadside assistance covers towing, jump starts, lockouts, and flat tires.
• Gap insurance protects a financed or leased car worth less than its loan balance.

A worked example

Consider a driver who owns a home with some equity, has retirement savings, earns a steady salary, and drives a paid-off car about eight years old. She carries her state's minimum liability limits plus comprehensive and collision.

Liability is the first thing to fix. A serious accident could easily exceed minimum limits, and her equity, savings, and wages are all within reach of a judgment. She raises liability to at least 100/300/100 and asks what an umbrella policy would require.

Next, she checks her car's current market value, subtracts her deductible, and compares the result with what comprehensive and collision cost her each year. The car still has meaningful value and she could not easily replace it from savings, so she keeps both but raises the deductible to an amount she could pay without strain.

Finally, she sets uninsured and underinsured motorist coverage to match her new liability limits and skips rental reimbursement because her household has a second car. Her policy now protects her assets first and her car second.

Common mistakes

• Treating the state minimum as a recommendation rather than a legal floor.
• Setting liability by the car's value. Liability protects your assets, so an inexpensive car can still need high limits.
• Keeping comprehensive and collision on a low-value car out of habit, or dropping them on a car you could not afford to replace.
• Declining uninsured motorist coverage to save a little, then being hit by a driver with no insurance.
• Never revisiting limits after buying a home, getting a raise, or adding a teen driver.

What to ask your insurer

Before your next renewal, read your declarations page, then ask:

• What are my liability limits, and what would the next tier up cost?
• What does my state require, and does my policy include anything beyond that?
• Do my uninsured and underinsured motorist limits match my liability limits?
• What is my comprehensive and collision deductible, and how would a higher one change the price?
• What underlying limits would an umbrella policy need?

It is also reasonable to price the same coverage with your current insurer and one or two others yourself. The coverage calculator can help you organize your answers before the call.

Unsure where your own numbers should land? Lanewise Auto offers plain-English guidance on coverage and limits. Tell us what you want help with, call (888) 905-2130, or email contact@lanewiseauto.com, and we will walk you through it. Nothing to buy, no obligation.

The bottom line

How much car insurance you need comes down to protecting what a bad accident could take. Meet your state's minimum because you must, raise liability to match your assets and income, add an umbrella if your net worth outgrows your auto limits, keep comprehensive and collision while the car is financed or worth more than they cost, and carry uninsured motorist coverage. Review the policy whenever your life changes, and confirm the details with your insurer and your state insurance department.