Uninsured Motorist Coverage Rules in Ohio

Ohio does not require uninsured or underinsured motorist coverage, and since 2001 insurers have not even had to offer it. Here is what that means for your claim, plus the setoff, deadlines, and exceptions unique to Ohio.

ThatCarHitMe.com Editorial
May 27, 2026
6 min read

Uninsured motorist coverage rules in Ohio

Getting hit is bad enough. Finding out afterward that the driver who caused it had no insurance, or nowhere near enough to cover your injuries, is a second problem that lands squarely on you. In Ohio, whether you can still be made whole often comes down to one coverage sitting on your own auto policy: uninsured and underinsured motorist (UM/UIM) coverage. The catch is that Ohio does not require it, and the rules that govern it are specific enough that plenty of drivers misunderstand what they actually bought.

Ohio's roads produce a steady supply of these situations. There were 264,954 reported crashes statewide in 2025, and 26,533 in December alone.12 Any one of them can put you in front of a driver carrying the bare legal minimum, or nothing.

Ohio does not require it, and insurers do not have to offer it

This is the rule to understand first. Under Ohio Revised Code 3937.18(A), an auto policy "may, but is not required to, include uninsured motorist coverage, underinsured motorist coverage, or both."3 The coverage is optional for you, and it is optional for the insurer to even put it in front of you.

It was not always this way. Before October 31, 2001, an Ohio insurer had to make a written offer of UM/UIM coverage, and if it failed to do so, courts read the coverage into the policy by operation of law. Senate Bill 97 of the 124th General Assembly ended that. Effective October 31, 2001, it eliminated the mandatory-offer requirement and shut off coverage arising as a matter of law.4 The statute has been amended since, most recently by Senate Bill 56 effective March 14, 2023, and the optional framework has held.5

So the practical first step is simple. Pull your declarations page. If a line for uninsured or underinsured motorist coverage shows a dollar limit, you have it. If it is not there, you do not, and no argument about what an agent should have offered will put it back.

Why the gap matters here

Ohio's mandatory liability minimums are low. Under R.C. 4509.51, a driver only has to carry $25,000 for bodily injury to one person, $50,000 per accident, and $25,000 for property damage, the familiar "25/50/25" limits.6 Many drivers carry exactly that and nothing more. If your medical bills pass $25,000, which a single hospital stay or surgery can do, the at-fault driver's policy is tapped out and the rest falls on you unless you carry UIM.

Then there are the drivers with no policy at all. The Insurance Research Council estimated that in 2023, more than one in seven drivers nationally (15.4 percent) were uninsured, and more than one in six (18.0 percent) were underinsured.7 UM coverage answers the first group. UIM answers the second.

How underinsured coverage actually pays

Here is where Ohio surprises people. UIM does not stack neatly on top of the other driver's insurance. Under R.C. 3937.18(C), the limits of your underinsured motorist coverage are reduced by the amounts available under the liability policies covering the person who hit you.3

An example makes it concrete. Say you carry $100,000 in UIM and the driver who hit you had the $25,000 minimum. Your UIM does not pay $100,000 on top of that $25,000. It fills the gap up to your limit, so UIM pays at most $75,000, and your total recovery lands around $100,000. UIM also only applies when the at-fault driver's liability limit is lower than your UIM limit; if theirs matches or beats yours, there is nothing left for UIM to add. The statute further caps UIM at what your UM coverage would have paid had the other driver been completely uninsured.3 Understanding this before you choose limits is the difference between buying real protection and buying a number that looks larger than it pays.

Hit-and-run and unidentified drivers

If the car that hit you drove off, UM coverage can still apply. Ohio will not let you collect on a phantom vehicle on your say-so, though. When the operator or owner of the other vehicle cannot be identified, R.C. 3937.18 requires independent corroborative evidence to support the claim, meaning something beyond your own testimony, such as an independent witness or physical evidence at the scene.3 Reporting the crash right away and securing the official Ohio crash report is one way that evidence gets created.

The deadlines are not the ones you expect

A claim against the driver who hit you is a tort claim, and R.C. 2305.10 gives you two years from the crash to file it.8 A UM/UIM claim runs on a different track. You are making a claim against your own insurer under your contract, so the contract's timing rules control.

R.C. 3937.18(H) lets an Ohio policy require that any UM/UIM suit be brought within three years of the accident, or within one year after the at-fault driver's insurer becomes insolvent, whichever is later.3 That is the floor the legislature set, and your policy can add its own notice requirements on top. Two habits protect you. Tell your own insurer about the crash early, and get its written consent before you settle with the at-fault driver, because settling can destroy your insurer's subrogation rights and, with them, your UM/UIM claim.

What could change

There is real pressure to make this coverage mandatory again. House Bill 596 of the 136th General Assembly, referred to the House Insurance Committee on November 19, 2025, would require every Ohio auto policy to include uninsured motorist coverage and would raise the minimum bodily injury limits from 25/50 to 50/100.9 For now it sits in committee and is not law. Until a bill like it passes, the rule holds: if you want the protection, you have to buy it yourself.

If an uninsured or underinsured driver injured you, it is worth having someone read your policy against the facts before you sign anything, and you can start with the legal directory. For the official report of your wreck, see Ohio crash reports. If your vehicle itself lost market value, that is a separate claim; see diminished value in Ohio.

This article is general information about Ohio law, not legal advice.

Sources

  1. thatcarhitme.com, Ohio (Statewide) Crash Report, 2025 Annual. https://thatcarhitme.com/crash-data/ohio/statewide/2025-annual-report

  2. thatcarhitme.com, Ohio (Statewide) Crash Report, December 2025. https://thatcarhitme.com/crash-data/ohio/statewide/december-2025-report

  3. Ohio Revised Code § 3937.18, Uninsured and underinsured motorist coverage. https://codes.ohio.gov/ohio-revised-code/section-3937.18

  4. Ohio General Assembly, Am. Sub. S.B. 97, 124th General Assembly (effective Oct. 31, 2001). https://www.legislature.ohio.gov/legislation/124/sb97

  5. Ohio General Assembly, S.B. 56, 134th General Assembly (effective Mar. 14, 2023). https://www.legislature.ohio.gov/legislation/134/sb56

  6. Ohio Revised Code § 4509.51, Required minimum liability coverage amounts. https://codes.ohio.gov/ohio-revised-code/section-4509.51

  7. Insurance Research Council, Uninsured and Underinsured Motorists: 2017-2023. https://insurance-research.org/uninsured-motorists/uninsured-and-underinsured-motorists-2017-2023

  8. Ohio Revised Code § 2305.10, Two-year limitation for bodily injury. https://codes.ohio.gov/ohio-revised-code/section-2305.10

  9. Ohio General Assembly, H.B. 596, 136th General Assembly (introduced 2025; referred to House Insurance Committee Nov. 19, 2025). https://www.legislature.ohio.gov/legislation/136/hb596

About This Guide

Written by: ThatCarHitMe.com Editorial

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