According to the Insurance Information Institute, roughly 18.5% of Ohio drivers carried no auto insurance in 2023, ranking the state 12th highest in the country. 

For motorcyclists, that ratio hits harder than it does for someone in a sedan. Close to one in five drivers on I-71, I-75, or any Columbus intersection may have no coverage at all, and when one of them causes your crash, there is no insurance company on their side to pay for your broken femur, your spinal surgery, or your months of physical therapy. You are left covering those costs yourself unless your own policy is set up to fill the gap.

That gap is where uninsured and underinsured motorist coverage comes in. Most Ohio riders either skip this part of their policy or carry it at limits too low to cover a serious motorcycle injury. Understanding how UM/UIM works under Ohio law, what traps to avoid after an uninsured motorist motorcycle accident, and why your coverage limits matter more than you think can make the difference between full financial recovery and absorbing tens of thousands of dollars in costs that were never your fault.

How Does UM/UIM Coverage Work in Ohio?

Uninsured motorist (UM) and underinsured motorist (UIM) coverage are parts of your own motorcycle insurance policy. They pay your medical bills, lost income, and other costs when the driver who caused your crash either has no insurance or does not have enough. 

Under ORC § 3937.18, Ohio does not require you to carry UM/UIM coverage, but your insurer must offer it to you. If you turned it down when you bought your policy (or never noticed it was offered), you may have no safety net when an uninsured driver causes your crash.

UM coverage

UM coverage kicks in when the driver who hit you has zero insurance. As a result, you file a claim with your own insurance company instead of theirs. Your insurer evaluates your costs, including medical bills, lost wages, and pain and suffering, and pays you up to the UM limit on your policy. 

UM coverage also applies in hit-and-run crashes where the other driver cannot be identified, though Ohio law requires some form of outside evidence (a witness, surveillance footage, physical evidence at the scene) beyond just your account of what happened.

UIM coverage

UIM coverage applies when the other driver has insurance, but not enough to cover the cost of your injuries. This is the more common scenario in motorcycle crashes because the injuries tend to be severe enough to exceed Ohio’s low required minimums. 

For example, if the driver who caused your crash carries the state-required $25,000 in bodily injury coverage and your medical bills alone reach $120,000, UIM coverage bridges that gap.

However, one detail often catches motorcyclists off guard. In Ohio, your UIM payout is reduced by whatever the other driver’s insurance already paid you. So, if you carry $100,000 in UIM and the other driver’s insurer pays their full $25,000, your UIM coverage provides up to $75,000 more, not $100,000 on top of what you already received. 

Can You Stack UM/UIM Coverage in Ohio?

Stacking means combining coverage from more than one vehicle on your policy to increase the total amount available after a crash. If you insure three vehicles with $100,000 in UIM each, stacking would give you access to $300,000 in total UIM coverage.

Ohio law under ORC § 3937.18 allows insurance companies to block stacking in their policies, and most Ohio insurers do. That means your policy probably limits your UIM payout to the coverage on one vehicle, no matter how many vehicles you insure. However, Ohio courts have ruled that if the policy language blocking stacking is vague or unclear, stacking may still be allowed.

So, make sure to read the stacking language in your policy before you need it. If that language is missing or poorly worded, you may have access to more coverage than you realize after a motorcycle crash. Your attorney can review the specific wording and tell you whether stacking applies in your case.

What Deadlines Apply After an Uninsured Motorist Motorcycle Accident in Ohio?

Ohio gives you two years from the date of the crash to file a personal injury lawsuit. But most Ohio motorcycle insurance policies set their own deadlines for reporting a crash and submitting a claim. Missing those deadlines can give your own insurer a reason to deny coverage, even when the underlying case is strong.

UIM claims come with an additional trap: before you accept any money from the other driver’s insurance company, you must get written permission from your own insurer. If you settle with the other driver’s insurer without that approval, Ohio law may treat that settlement as you giving up your UIM claim entirely. 

This is one of the most common and costly mistakes riders make after a crash, and it happens because the other driver’s insurer moves fast with a low offer that seems reasonable before the full scope of your injuries and costs becomes clear.

Does Comparative Negligence Still Apply in UM/UIM Claims?

Yes. Ohio’s shared-fault rule under ORC § 2315.33 applies to UM/UIM claims the same way it applies to any accident claim. If you are found more than 50% responsible for the crash, you recover nothing. If you are found partially at fault but at 50% or below, your payout is reduced by your share of fault.

As a result, your own insurance company has a financial reason to pin as much fault on you as possible, because every percentage point they assign to you reduces what they owe. You are filing a claim on your own policy, but your insurer is not acting in your interest during this process. They will look at your speed, your lane position, whether you were wearing a helmet, and your licensing status, all to build a case that you share blame for the crash.

Why Do Uninsured Motorist Claims Hit Ohio Motorcyclists Harder?

The financial math for motorcyclists is different from the math for someone driving a sedan. The injuries from a motorcycle crash involving an uninsured or underinsured driver tend to be more severe: traumatic brain injuries, spinal cord damage, multiple fractures, and road rash requiring surgery and long-term rehabilitation.

That injury severity means motorcycle crashes burn through policy limits faster than car accidents. Ohio’s state minimum of $25,000 in bodily injury liability can disappear inside a single emergency room visit. A rider carrying only $25,000 in UIM coverage on their own policy will find, after the offset, that their UIM pays nothing if the at-fault driver also carried $25,000. The coverage cancels itself out.

What Should You Do After an Uninsured Motorist Motorcycle Accident in Ohio?

Review your motorcycle policy immediately

Check whether you have UM/UIM coverage, what the dollar limits are, and whether your policy blocks stacking. If you do not have UM/UIM coverage, your only option may be suing the uninsured driver directly, and most uninsured drivers do not have the money or assets to pay a judgment.

Get medical care and document everything

Emergency medical records create a direct link between the crash and your injuries. Gaps in treatment give your insurer an opening to argue your injuries are not as serious as you claim. Keep records of every medical visit, prescription, therapy appointment, and out-of-pocket cost.

Talk to a motorcycle accident attorney

UM/UIM claims require a different approach than a standard accident case, because the insurance company you are negotiating with is your own. Their financial interest runs against yours: they profit by paying you less. 

Our motorcycle accident attorneys at Slater & Zurz know how Ohio UM/UIM law works inside and out. We’ll review your insurance policies, including auto, motorcycle, and umbrella coverage, to find every available source of UM/UIM money. We manage the relationship with both the other driver’s insurer and yours, making sure one settlement does not undercut the other. If your insurer lowballs or denies your claim, we are prepared to take them to court.

If an uninsured or underinsured driver caused your motorcycle crash in Ohio, call Slater & Zurz at 330-762-0700 for a free consultation. There is no fee unless we win your case.