How Much Car Insurance Do You Actually Need?

Most drivers buy whatever coverage their state requires, or whatever their agent defaults them into, and never think about it again. That's a mistake in both directions. Buying only the legal minimum can leave you personally on the hook for tens of thousands of dollars after a bad accident. Buying more than you need just pads an insurer's profit margin.

Here's how to actually figure out the right amount, instead of guessing.

What Car Insurance Actually Covers

A car insurance policy is really a bundle of separate coverages, and each one protects something different:

• Liability (bodily injury and property damage): Pays for the other person's injuries or car damage when you're at fault. It does not pay for your own injuries or your own car.
• Collision: Pays to repair or replace your car after an accident, regardless of fault.
• Comprehensive: Covers non-collision events like theft, vandalism, hail, or hitting a deer.
• Uninsured/underinsured motorist (UM/UIM): Pays your costs if the at-fault driver has no insurance or not enough.

"Full coverage" is a term used to describe a combination of collision and comprehensive insurance layered on top of liability, not a separate product.

State Minimums Are a Legal Floor, Not a Safety Net

Every state sets its own required liability limits, usually written as three numbers, like 25/50/25. A 25/50/25 policy pays up to $25,000 for injuries to one person, $50,000 total for all injuries in a single accident, and $25,000 for damage you cause to other vehicles or property. The most common minimum is 25/50/25, but limits range from Florida's $10,000 PIP-only structure to Alaska's 50/100/25.

Those numbers sound reasonable until you look at real accident costs. The average car accident involving injury costs $62,000 according to the National Safety Council, while the average property damage claim reaches $5,400. If you cause a serious crash and only carry the state minimum, the gap between what your policy pays and what you actually owe becomes your problem — and it can be pursued through wage garnishment or a lien on your assets.

State minimums set the legal floor, not the adequate protection level. A single serious accident can generate medical bills and property damage well exceeding typical minimum limits — leaving you personally liable for the difference.

The Simple Rule for How Much Liability to Carry

Skip the guesswork. A liability limit should be sized to what you have to lose, not to what the state requires. As a rule of thumb, you should have enough liability insurance to cover your net worth.

In practice, that means:

• If your net worth is modest (under roughly $50,000), a limit around 100/300/100 is a reasonable target once you can afford it.
• If your net worth is higher, or you have significant home equity, retirement savings, or investments, push toward 250/500/100 or higher.
• If you have a high net worth, an umbrella insurance policy can increase your liability coverage to $1 million or more for a relatively small added premium, once your auto and home policies are maxed out.

Do You Need Collision and Comprehensive?

This one comes down to math, not preference. If your car is financed or leased, your lender almost certainly requires it — if your vehicle is financed or leased, you are likely required to carry full coverage as a condition of your loan or lease agreement.

If you own the car outright, ask what it's actually worth. If your car is worth $4,000 and your collision deductible is $1,000, you're paying premiums year after year for a payout that's capped at $3,000. At some point it's cheaper to self-insure that risk and bank the premium difference instead.

What Coverage Actually Costs

The national average cost of car insurance in the United States as of July 2026 is $2,266 annually or $189 per month, with minimum coverage car insurance averaging $1,576 annually or $131 per month, and full coverage car insurance averaging $2,926 annually or $244 per month. Your actual price depends heavily on your state, age, driving record, and vehicle — the average cost of full coverage auto insurance ranges from a low of $1,581 in Vermont to a high of $4,182 in Maryland.

Lowering Your Premium Without Cutting Corners

• Raise your deductible on collision and comprehensive if you have the emergency fund to cover it — this lowers your premium without touching your liability protection, which is the part that protects your net worth.
• Shop your policy every year or two. Take the time to compare insurance quotes from several insurers before buying a policy.
• Ask about discounts for bundling, low mileage, defensive driving courses, and good credit, where allowed.
• Never cut liability limits to save money — cut collision/comprehensive deductibles or shop insurers instead.

Reviewing coverage like this is a good candidate for your next Grade My Finance check-in — insurance gaps rarely show up in a credit score or a bank balance, but they can wipe out years of savings in a single bad accident.

The Bottom Line

State minimum liability limits keep you legal. They don't keep you financially safe. Size your liability coverage to your net worth, keep collision and comprehensive only if the math on your car's value supports it, and revisit your policy at renewal instead of letting it auto-renew on autopilot.