Uninsured Motorist Coverage Explained: State Rules and What It Covers

You can do everything right and still be wrecked by someone else's decision. You buy the coverage, you pay every month, you drive carefully, and then a driver with no insurance at all runs a stop sign and puts you in hospital. Your policy pays other people when you are at fault. It does not automatically pay you when the person at fault has nothing.

That is the job of uninsured motorist coverage, and it is one of the least understood lines on a car insurance policy. Twenty states and the District of Columbia require it. The rest leave it to you, and most drivers in those states have never been told what they are turning down.

Over twenty years of writing about money I have found that the fastest way to make an insurance decision clear is to put the actual numbers on the table. So this guide does something the big insurers' own pages do not: it publishes the full list of all 51 states and the District of Columbia, showing what share of drivers there carry no insurance and whether the state requires you to protect yourself from them. Put those two columns side by side and something uncomfortable falls out, which is the heart of this article.

1. What Uninsured Motorist Coverage Actually Is

Uninsured motorist coverage is the part of a car insurance policy that pays you when someone else causes a crash and has no insurance to pay for it. It sits on your own policy, you pay for it yourself, and it only does anything on the day another driver fails you.

That is a strange thing to buy, and it is why so many people decline it without thinking. The rest of your policy is easy to picture. Liability coverage pays other people when you are at fault. Collision coverage fixes your car. Uninsured motorist insurance is the one that covers a failure that is not yours and not your insurer's, but the other driver's.

Here is what it does in practice:

• It stands in for the other driver's missing policy. Your insurer pays what the at-fault driver's insurer should have paid, up to the limit you bought.
• It covers injuries first. Medical bills, lost wages, and in most states pain and suffering, for you and for everyone in your car.
• It can cover your car too, but only in some states, and that half is called uninsured motorist property damage.
• It follows the person, not just the car. In most states it protects you as a pedestrian, on a bicycle, or riding in someone else's vehicle.
• It does nothing when you are at fault. That is what your liability and collision coverage are for.

If the whole structure of a car insurance policy is still fuzzy, our guide to what car insurance covers walks through every coverage type from the beginning. This article goes deep on the one coverage that guide only had room to summarise.

2. Uninsured vs Underinsured: The Difference That Costs People Money

Almost every article on this subject mentions underinsured motorist coverage in a sentence and moves on. That sentence is where most of the real money is, so it is worth slowing down.

Uninsured means the other driver had no policy at all. Underinsured means they had one, it was legal, and it was far too small for the damage they caused. The second case is more common than the first, and people are far less prepared for it.

Think about the arithmetic. Many states set their minimum bodily injury requirement at $25,000 per person. A driver who buys exactly that has obeyed the law. Now suppose they run a red light and put you in hospital with a broken leg, surgery, and three months off work. A bill of $90,000 is ordinary for that. Their policy pays $25,000 and stops. The remaining $65,000 has to come from somewhere.

• With underinsured motorist coverage: your own policy steps in and covers the gap, up to your limit.
• Without it: you can sue the driver, and you will usually find that a person who bought the cheapest legal policy does not have $65,000 to take.

This is why the two are almost always sold together as uninsured and underinsured motorist coverage, on one line, at one price. Of the 51 places in the table further down, 15 require both and 6 require the uninsured half only.

There is one detail that catches people out. In many states, underinsured coverage does not simply add to the other driver's policy. It fills the gap up to your limit. If you carry $100,000 and the at-fault driver carried $25,000, you are not protected to $125,000. You are protected to $100,000, of which their insurer pays the first $25,000 and yours pays $75,000. Insurers call this a reducing or offset limit, and it is the single most common surprise in a claim.

3. The Four Types of Uninsured and Underinsured Motorist Coverage

What looks like one product on a quote is really up to four separate coverages. Some states sell them bundled, some split them apart, and some do not offer one of them at all.

Insurers almost never print these names in full. Your declarations page will carry abbreviations instead, and they are not standardised, which is a large part of why drivers do not know what they own. The same coverage appears as one set of initials on one quote and a different set on another. Here is the shorthand, matched to the full name, so you can read your own policy.

Two more labels are worth knowing. Some insurers group the underinsured pair together and call the whole thing UIM coverage. And a handful of quote sites sell UMPD insurance as a standalone item in states where the property half is optional, which is why a driver can end up covered for their injuries but not for their car. From here on this guide uses the full names, so nothing is ambiguous.

The confusion runs the other way too, and it is worth clearing up because it sends people to the wrong page. Most drivers who search for car insurance for uninsured drivers, or for auto insurance for uninsured drivers, mean exactly what this guide covers: protection from somebody else who has none. A smaller group mean the opposite, a policy for a person who is currently driving with no cover, which is just an ordinary car insurance policy bought late. Some insurers also print it as uninsured driver coverage on a quote, and once you file, the paperwork on the underinsured half is often headed a UIM claim. Every one of those names points at the same part of your policy.

Every one of these is separate from collision coverage, and separate from the liability coverage the law makes you buy. If you are still weighing whether to carry the optional coverages at all, our comparison of full coverage against liability only sets out that decision in detail.

4. How Many Drivers Are Uninsured: Past, Present, and Outlook

The value of this coverage depends entirely on one number: how likely the next driver who hits you is to have nothing. That number is measured, it is published every year by the Insurance Research Council through the Insurance Information Institute, and it has moved sharply.

Read that table twice. Between 2017 and 2019 the share of uninsured drivers was falling. Then in 2020 it jumped by 2.7 points in a single year, and it has climbed every year since. It has never returned to where it was. By 2023, the most recent year published, 15.4% of drivers had no insurance at all. That is more than one driver in seven, and it is a 3.0 point rise across the seven years shown.

• The past. The 2020 jump is not mysterious. Household budgets came under strain, several states paused enforcement and licence suspensions during the pandemic, and many people let a policy lapse because it was the easiest bill to stop paying. What is striking is that the recovery never came. Enforcement returned and the rate kept rising, which suggests the cause is now cost rather than opportunity.
• The present. Car insurance premiums rose steeply through 2023 and 2024, driven by repair costs, vehicle values, and medical inflation. When premiums rise faster than wages, the drivers at the edge of affordability drop out first. Those are also, on average, the drivers with the least ability to pay you back after a crash. So the risk and the inability to recover arrive together.
• The outlook. Nobody can forecast this reliably, and any figure for 2026 would be a guess. What can be said is that the direction has been one way for four straight readings, and that the pressures behind it, premium costs and enforcement gaps, have not reversed. Industry observers generally expect the rate to stay well above its pre-2020 level rather than fall back to it. Treat that as an expectation, not a promise, and check the current figure when you renew.

The 2023 reading and the state figures below come from the Insurance Research Council, published through the Insurance Information Institute, and were read on 12 August 2026. The requirement data is dated December 2023. Both are the latest published at the time of writing. State law changes, so confirm your own state before you buy.

5. State by State: Uninsured Driver Rates and What Each State Requires

This is the table that sent me looking for this topic in the first place. Progressive, GEICO, State Farm and Liberty Mutual all tell you that requirements vary by state and that you should check your own. None of them publishes the list. So here it is, all 51 rows, with the thing that actually matters set beside it: how many drivers in that state carry nothing.

Uninsured driver share is the 2023 figure from the Insurance Research Council. The requirement column is as of December 2023. "Both required" means the state requires uninsured and underinsured motorist coverage. "Uninsured motorist only" means the underinsured half is optional. Sixteen states also require the property damage half in some form, so read your own state's rules rather than assuming the bodily injury answer covers both.

Across the 51 rows, 21 require some form of the coverage, which matches the Insurance Information Institute's own description of twenty states and the District of Columbia. The other 30 leave it entirely to the driver. Now put your own state into the calculator and see what those two columns mean for you.

6. The Mismatch: Required Least Where It Is Needed Most

Two published tables sit side by side above, and as far as I can find, nobody has joined them. When you do, the result is uncomfortable.

Two of the ten worst states require the coverage. Eight leave it optional. Now the other end of the scale.

Six of the ten safest states require it.

Mississippi makes the point on its own. More than one driver in four there carries no insurance, the worst rate in the country, and the coverage that protects you from those drivers is entirely optional. New Mexico at 24.1%, Michigan at 22.3%, Tennessee at 21.3%, Florida at 20.6% and California at 20.4% are all in the same position.

Why does this happen? Not because anyone designed it that way. State insurance requirements are set by legislatures at different moments for different reasons, and they are rarely revisited when the underlying risk moves. A rule written in a decade when 8% of drivers were uninsured stays on the books when the figure reaches 20%. The requirement reflects the politics of when it passed, not the road you drive on today.

The practical conclusion is the part that matters. In the states where this coverage is optional, it is usually more valuable, not less. If you live in one of the eight optional states in that first table, the absence of a legal requirement is telling you nothing about whether you need it. If anything it is telling you the opposite.

7. Hit-and-Run Accidents: When Uninsured Motorist Coverage Pays and When It Does Not

A hit-and-run is the purest case for this coverage. There is no other driver to claim against, because there is no other driver to find. In most states an unidentified driver counts as an uninsured driver, and uninsured motorist bodily injury coverage pays your medical bills.

The property half is where it gets complicated, and this is the detail buried deepest on competitor pages:

• Injuries are usually covered. Uninsured motorist bodily injury insurance normally treats a hit-and-run driver as uninsured, so your medical costs and lost wages are paid.
• Your car may not be. Several states will not let uninsured motorist property damage pay for a hit-and-run, precisely because the driver cannot be identified. The concern is fraud: without a named driver, any parking lot dent could become a claim.
• Collision coverage fills that hole. In those states, damage to your car from a hit-and-run is paid by collision coverage instead, subject to your deductible.
• Some states require a police report, or physical contact between the vehicles, before either coverage will pay. A driver who swerves to avoid a car that never touches them may find the claim denied.

This produces a specific trap. A driver who buys uninsured motorist coverage, declines collision to save money, and is then hit by a car that drives away can find their injuries covered and their vehicle not covered at all. If you carry no collision coverage, ask your insurer directly whether uninsured motorist property damage pays on a hit-and-run in your state. It is a one sentence question and the answer changes what you should buy.

8. Uninsured Motorist Property Damage vs Collision Coverage

These two overlap enough that people buy both without meaning to, or drop the wrong one. They are not the same thing.

The practical rule is simple. If you already carry collision coverage, uninsured motorist property damage is close to redundant for your vehicle. Its remaining value is that it often carries no deductible where collision carries $500, so the same repair costs you less. If you carry no collision coverage, on an older car for example, then uninsured motorist property damage is the only thing standing between you and the full repair bill when an uninsured driver hits you.

One more point that only shows up in a claim. Using collision coverage means paying your deductible and then waiting for your insurer to recover the money from the other driver, which is difficult when that driver has no insurer. Using uninsured motorist property damage skips that step. On the same crash, the second route often puts you several hundred dollars ahead.

9. Uninsured Motorist Coverage vs Health Insurance: Do You Need Both?

This is the most common reason people decline the coverage, and it is the reason with the biggest hole in it. Health insurance and uninsured motorist bodily injury coverage pay for overlapping things, but they are not substitutes.

What health insurance does not do:. The NAIC is the National Association of Insurance Commissioners, the body through which the state insurance regulators coordinate their rules.

• It does not pay lost wages. If you cannot work for three months, health insurance pays the hospital and nothing else. Uninsured motorist coverage can pay the income you lost.
• It does not pay for pain and suffering. In most states this is a real, claimable amount, and it is often the largest single component of a serious injury claim.
• It leaves you the deductible and the coinsurance. A $3,000 deductible plus 20% coinsurance on a $60,000 hospital stay is real money out of your pocket. Uninsured motorist coverage commonly has no deductible.
• It does not cover your passengers. Your friend in the passenger seat is on their own health plan with their own deductible. Your uninsured motorist coverage extends to them.
• Public programmes may pay last. Medicare and Medicaid can require other sources to be exhausted before they pay, and may seek repayment from a later settlement.

Set against that, health insurance does one thing this coverage cannot: it has no per accident limit in the way a $100,000 uninsured motorist limit does. The honest answer is that they cover different failures, and the overlap is smaller than it looks. The NAIC consumer material on auto insurance explains how the coverages on an auto policy relate to each other, and is a neutral place to check the terms your insurer uses.

10. How Much Uninsured Motorist Coverage to Buy

There is a default answer here that is right for most people: match your uninsured motorist limits to your liability limits. Several states require exactly that, and where they do not, it is still the sensible starting point. The logic is that you have already decided how much harm you want covered when you cause it. The harm does not get smaller when someone else causes it.

The pattern in that last column is the useful part. Coverage limits do not cost proportionally. Doubling your limit rarely doubles your premium, because most claims are small and the extra layer is rarely reached. That is why raising uninsured motorist limits is usually one of the cheapest improvements available on a car insurance policy. Get a quote at two levels and compare the actual figures before deciding.

11. A Real Example: What an Uninsured Driver Costs You

Numbers make this concrete. Elena drives to work in Tennessee, where 21.3% of drivers carry no insurance and the coverage is not required. A driver runs a stop sign and hits her. He has no policy at all. Elena breaks her wrist, needs surgery, and is off work for eleven weeks. Her car needs $7,400 of repairs.

Here is her actual bill, run two ways. In the first she declined uninsured motorist coverage. In the second she carried $100,000 of uninsured motorist bodily injury and uninsured motorist property damage, and she carries collision with a $500 deductible in both cases.

The gap is $20,350, and none of it is exotic. It is a health plan deductible, eleven weeks of missing salary, and one collision deductible. Elena did nothing wrong on the road and nothing wrong with her insurance. She simply declined an optional coverage in a state that does not require it, and the driver who hit her had nothing to take.

Elena could sue him. She would win, and she would collect very little, because a person driving with no insurance in Tennessee rarely has $20,000 in reachable assets. That is the quiet truth behind this whole coverage: a legal right to be paid is worth nothing if the person who owes you is broke.

12. How to Add Uninsured Motorist Coverage to Your Policy

Adding it is genuinely easy. Getting the right version of it takes five minutes of asking. Most quote tools list uninsured motorist insurance coverage as an optional add-on part way down a long form, which is exactly how so many drivers end up without it: not by deciding against it, but by scrolling past it.

• Find your declarations page. It is the summary sheet your insurer sends at renewal. Look for the abbreviations in the shorthand table above.
• Check whether you already declined it. Several states require insurers to offer the coverage and require your refusal in writing, so if you declined it there is a signed form on file.
• Ask for both halves by name. Request uninsured and underinsured motorist coverage together, and ask separately about the property damage portion, which is often left off.
• Match the limits to your liability limits, then price one level higher and compare.
• Ask the three questions that are never on the summary: is there a deductible on the property damage half, does it pay on a hit-and-run in this state, and does the underinsured half add to the other driver's policy or offset against it.
• Get the change in writing and check it appears on the next declarations page.

If your insurer's answers are vague, your state insurance department regulates them and publishes plain consumer information. The NAIC directory of state insurance departments will take you to the right office. For licence, registration and financial responsibility rules, which sit with a different agency, the USA.gov guide to state motor vehicle services is the starting point.

One last piece of timing. This coverage cannot be added after a crash, and it will not apply to a crash that has already happened. It is worth exactly nothing on the day you need it if you bought it the day after.

Frequently Asked Questions

Final Thoughts

Uninsured motorist coverage protects you from other people's decisions, which is why it feels optional and why it so often is not. The data in this guide points one way. More than one driver in seven now carries nothing, that share has risen every year since 2020, and the states where the problem is worst are mostly the states that leave the coverage up to you.

If you take one action after reading this, pull out your declarations page and look for the uninsured motorist line. If it is missing, or if the limit is lower than your liability limit, get a quote for raising it. It is usually one of the least expensive changes on the whole policy, and unlike most insurance decisions, this one protects you from a risk that is measurably growing.

This article is for general information only and is not financial, insurance, or legal advice. Uninsured motorist coverage rules, limits, deductibles, and availability are set state by state and change over time, and every insurance policy has its own wording, so confirm the details with a licensed insurance agent or your state insurance department before you buy or decline any coverage. The uninsured driver figures are 2023 data from the Insurance Research Council published through the Insurance Information Institute, and the state requirements are as of December 2023; both were the latest published when this guide was written and were last checked in July 2026. All dollar amounts are illustrative examples used to show how the coverage works, not quotes and not a promise of any payout. Always read your own policy.Disclaimer.