The most important coverage on your auto policy is the one you probably rejected

By Michael Gordy, INS. (In Noble Service)

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"I've got full coverage."

I hear it on almost every auto quote. It means comprehensive and collision. It means the car gets fixed.

It says nothing at all about who pays when a stranger runs a red light and puts your wife in surgery.

That answer lives on a different line of the policy, and on a lot of the declarations pages I read, the line says this:

UNINSURED MOTORISTS BODILY INJURY ..... REJECTED

Somebody signed that. Probably a checkbox during a phone quote, or an initial on a form during a signing that took 11 minutes. When I read it back to them, most people are surprised it's there.

I think that line is the most consequential thing on the page. Here's my case.

What this coverage actually does

Most of what's on your auto policy does one of two things.

Liability pays other people when you cause the wreck. Comprehensive and collision pay for your car.

Uninsured and underinsured motorist coverage does something neither of those does. It pays you and your family for injuries when the at-fault driver can't. Medical bills, lost income, future care, pain and suffering. The whole claim, the same way a liability policy would pay a stranger you hit.

Medical payments coverage helps, and you should carry it. It's commonly written between $1,000 and $10,000 and covers medical and funeral expenses. It won't replace your paycheck or compensate you for the injury itself.

UM/UIM is the only line on the policy that treats your family the way your liability coverage treats everybody else. And it's the first thing people cut when they want the premium down, because cutting it changes nothing they can see.

The driver next to you

In 2023, 15.4% of drivers countrywide had no insurance at all. Another 18.0% were underinsured, meaning they had a policy but not enough to cover what they'd do to you. Combined, about 1 in 3 drivers on the road can't pay for the damage they're capable of causing.

The uninsured rate jumped in 2020 and has climbed every year since, from 11.6% in 2019 to 15.4% in 2023.

All four states we write in are worse than the national average on the uninsured half of that:

State	Uninsured drivers, 2023	National rank
Tennessee	21.3%	5th highest
Georgia	19.0%	11th
Ohio	18.5%	12th
Alabama	16.8%	15th

Now look at what the ones who do carry insurance are carrying. Georgia, Alabama, Tennessee, and Ohio all set the legal minimum at 25/50/25. That's $25,000 of bodily injury coverage per person.

$25,000 covers an ambulance ride, an emergency room visit, and a set of images, with a little left over. It's gone the second anybody schedules a surgery.

Add-on and offset, and why the difference is worth thousands

This is the part almost nobody has heard, and it decides how much money actually shows up. There are two ways UM/UIM can be built.

Add-on, sometimes called excess. Your coverage pays on top of whatever the at-fault driver's policy pays. Their $25,000 plus your limit. Georgia caps the combined recovery at what your losses actually come to, so add-on never pays more than the injury is worth. It stops the at-fault driver's small policy from eating into yours.

Offset, sometimes called reduced-by or difference in limits. Your limit is the ceiling on the whole recovery. Whatever the at-fault driver pays comes out of your limit, and your policy pays only the gap underneath it.

Same limit on the dec page. Very different check.

Georgia gives you the good version by default. Since January 1, 2009, add-on is what a Georgia policy provides unless you sign something. Getting the reduced-by version instead requires selecting it in writing. Plenty of Georgia policies are sitting on reduced-by anyway, because somebody put a form in front of somebody and the difference never got explained.

Tennessee runs on offset. Your limit gets reduced by what's collectible from the at-fault driver, and Tennessee is generally anti-stacking.

Ohio worries me most. Ohio law says an insurer may, but is not required to, include UM/UIM at all. It's fully optional, so plenty of Ohio drivers are carrying policies with none of it. When you do buy the underinsured half in Ohio, it can't be written as excess, and it's reduced by the at-fault driver's available limits.

Alabama has its own wrinkle. UM has to be included unless you turn it down, and Alabama doesn't require that rejection to be in writing, so it's easier to end up without it there than in Georgia or Tennessee. Alabama does let you stack up to 3 coverages within one policy, which helps if you've got multiple cars on it.

One wreck, four outcomes

Here's the arithmetic. One driver, one surgery, no exaggeration anywhere in it.

You're stopped at a light. Someone hits you at 40 miles an hour and they carry the state minimum, 25/50/25. You have $100,000 of UM/UIM, which most people would call responsible limits.

What the injury costs:

Item	Cost
Ambulance, emergency room, CT and MRI	$14,000
Orthopedic surgery, hardware, 3 nights inpatient	$62,000
Physical therapy and follow-up over 7 months	$11,000
Lost income, 4 months out at $84,000 a year	$28,000
Hard costs	$115,000

Illustrative figures built from typical billed amounts. Yours will differ.

That's before a dollar for pain and suffering, and before anyone asks what the shoulder is going to need in six years.

The at-fault driver's carrier pays their $25,000 and closes the file. That's all there is over there. Now everything depends on how your own policy is built.

Your situation	Total available to you
Georgia, add-on UM/UIM at $100,000	$125,000
Georgia, elected reduced-by at $100,000	$100,000
Tennessee or Ohio, $100,000 offset	$100,000
Ohio, no UM/UIM purchased	$25,000

Same wreck. Same injury. Same $100,000 on the dec page. A $100,000 swing between the top row and the bottom, decided by a state statute and a signature.

And look at the top row, the good one. $125,000 against $115,000 of hard costs leaves $10,000 for a permanent shoulder limitation, for the second procedure, for all of it.

Your limit is the ceiling on your own recovery

This is the part that makes me rank UM/UIM above everything else.

When somebody hurts you and they have nothing, your recovery stops at your UM/UIM limit. Your injury can be worth $400,000 and a jury can agree, and you still collect the number you picked on a phone call years ago, probably while trying to get the premium under a certain figure.

Nobody raises that number for you after the wreck. Whatever you chose is the most you can ever collect from insurance for your own body. You can chase the at-fault driver personally for the rest, and if they were carrying 25/50 you already know how that collection effort tends to go.

That's the whole reason I rank it first. It's the sole limit on the worst financial outcome your family can have from a car, and you set it yourself.

The strongest argument against me, stated fairly

Liability has a better claim to "most important" by one measure, and I'd rather say it than have you notice I skipped it.

Liability is what stops a lawsuit from reaching your house, your savings, and your future wages. If you cause a wreck that seriously injures someone and you carry 25/50, the injured party's attorney can come after everything you own. UM/UIM protects your recovery. Liability protects your entire net worth. It's also the one the state actually makes you buy.

So if you only have money for one of them, buy liability. That's the honest answer.

Here's why I still rank UM/UIM first in practice. Everyone already carries liability, because the state makes them, and most people have at least thought about the number. Almost nobody has had a real conversation about UM/UIM. It gets rejected or left at the minimum by default. And the exposure it covers is the more likely of the two: roughly 1 in 3 drivers around you can't pay for what they'd do, which makes someone underinsured hurting you far more probable than you badly hurting someone else.

Liability carries the bigger dollar risk. UM/UIM is the one that gets neglected, and it's the one your family collects on.

What I put on my own policy

Get your bodily injury liability to 250/500, then match your UM/UIM to it.

That order matters, and it's the detail most people miss. In Georgia and Tennessee your UM/UIM legally can't exceed your bodily injury liability limits. Sitting on 100/300 liability, you aren't allowed to buy 250/500 UM/UIM. Raise the liability first. Where your state lets you choose the structure, choose add-on.

Get the actual quote before you decide. The number in your head is almost certainly higher than the number on the page, and I've yet to have a client see the real difference and tell me the lower limit was the right call.

Two related things while you're in there.

Property damage liability of $100,000 wherever your carrier offers it. The average new vehicle sold for $48,402 in 2025. More than 1 in 5 new vehicles now sells above $60,000. Rear-end a loaded pickup at a light and a $50,000 property damage limit is finished with one vehicle, before the guardrail or anyone else's car.

An umbrella is the next conversation, and it's a short one. A personal umbrella sits above your auto and home liability, and with some carriers in some states it can extend your UM/UIM as well. That extension is never automatic and it usually has to be asked for and priced separately, so don't assume you have it. Ask.

Check your own policy in 5 minutes

Pull your auto declarations page. Four things.

1. Is UM/UIM even on there? Look for "uninsured motorists bodily injury" or "UMBI." If it says rejected, declined, or shows no limit, you have none. If you're in Ohio, check this first, because it's optional there and plenty of policies simply don't have it.

2. What's the limit, and does it match your liability? Compare the UM/UIM line to the bodily injury liability line directly above or below it. They're often different, and the UM/UIM one is usually lower.

3. Add-on or reduced-by? Georgia policies especially. This one usually isn't printed on the dec page at all. It lives on the UM selection form in your policy packet, so look for "added on," "excess," "reduced by," or "difference in limits" there. If you can't find the form, that answer is in your agent's file and it takes them about two minutes to pull.

4. Property damage liability. Third number in the set. If it's $25,000 or $50,000, price the move to $100,000 before you assume you can't afford it.

If you did those four steps and everything checked out, you're in better shape than most of the dec pages that cross my desk, and you didn't need me for it.

Send it over

If you want a second set of eyes, send your dec page to michael@ins.insure or book 15 minutes. We'll read it line by line and tell you exactly what's on it.

Same two promises I make every time. If your policy is already good, you'll hear "this is a good policy, keep it," and I'll mean it. And if you're paying for something you don't need, we'll tell you that too, even when it costs us the sale.

We win clean or we don't win.

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If you own a home, the same audit is worth doing on that policy. I wrote about what your house actually costs to rebuild and what gets quietly removed when an agent beats your renewal.

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INS. (In Noble Service) is an insurance agency based in Alpharetta, Georgia, writing personal home and auto in Georgia, Alabama, Tennessee, and Ohio.