Oklahoma Does Not Mandate Underinsured Motorist Coverage
Oklahoma law does not require you to carry underinsured motorist (UIM) coverage on your auto policy. The state's mandatory insurance requirements are limited to liability coverage: $25,000 per person for bodily injury, $50,000 per accident for bodily injury, and $25,000 for property damage. Underinsured motorist protection is optional.
However, every carrier writing auto insurance in Oklahoma must offer UIM coverage to you at the time you purchase or renew your policy. If you do not want it, you must decline it in writing. Most households with multiple vehicles accept the default offer without realizing they made an active choice — the coverage appears on every vehicle on the policy unless you explicitly opt out.
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Get Your Free QuoteOklahoma Uninsured Motorist Rate
12%
One in eight drivers on Oklahoma roads carries no insurance. Underinsured motorist coverage protects you when an at-fault driver's liability limits are too low to cover your damages, a scenario that becomes more likely as the number of vehicles and drivers in your household increases.
Insurance Research Council, 2023
The Offer-and-Decline Rule
Oklahoma insurance law requires every carrier to offer UIM coverage in amounts equal to your liability limits. If you carry $50,000 per person in liability, the carrier must offer you $50,000 per person in UIM. You can accept the offer, decline it, or select a lower limit — but the carrier cannot skip the offer.
Declining UIM requires a signed waiver. The waiver must be part of your application or renewal paperwork, and it must clearly state that you understand you are rejecting coverage. Without a signed waiver on file, the carrier must include UIM on your policy by default.
When you insure multiple vehicles on one policy, the waiver applies to the entire policy, not to individual vehicles. You cannot decline UIM on one car and accept it on another. The coverage decision is policy-wide.
If you never signed a waiver, UIM is already on your policy. Check your declarations page — the coverage appears as a separate line item with its own premium.
What Underinsured Motorist Coverage Actually Pays
Underinsured motorist coverage pays the difference between what the at-fault driver's liability policy pays and your actual damages, up to your UIM limit. If you carry $50,000 in UIM, you have room for larger claims.
The coverage applies to every driver and passenger in your household vehicles. When you insure three cars on one policy, every person in any of those three vehicles is covered under the same UIM limit. This makes the coverage particularly valuable for multi-vehicle households, where multiple family members drive different cars at different times.
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How the Waiver Process Works When You Add or Remove a Vehicle
Adding a vehicle to an existing policy does not trigger a new UIM offer if you already have coverage in place. The new vehicle is covered under the existing policy's UIM limit automatically. If you previously declined UIM and signed a waiver, the waiver remains in effect — the new vehicle is added without UIM, and you do not need to sign a new waiver.
Removing a vehicle from the policy does not change your UIM status. If you drop from three cars to two, the remaining vehicles retain the same UIM coverage or waiver that was in place before. The only time you revisit the UIM decision is at renewal, when the carrier must offer the coverage again.
If you want to add UIM to a policy that currently has none, contact your carrier mid-term. You do not need to wait for renewal. The carrier will add the coverage and adjust your premium for the remaining term. If you want to drop UIM mid-term, you must sign a new waiver — verbal requests are not sufficient.
Oklahoma Minimum Liability Per Person
$25,000
Oklahoma's minimum bodily injury liability limit is $25,000 per person. A serious injury claim can exceed that amount quickly, leaving you to cover the gap out of pocket unless you carry UIM. Households with multiple vehicles face higher exposure because more drivers and passengers are on the road under the same policy.
Oklahoma Insurance Department
Stacking and Non-Stacking UIM Policies
Oklahoma allows stacking of UIM coverage unless your policy explicitly prohibits it. Stacking means you can combine the UIM limits from multiple vehicles on the same policy to cover a single claim.
Not all carriers offer stacking, and those that do often charge a higher premium for stacked policies. Non-stacked policies limit you to the per-vehicle UIM amount regardless of how many cars you insure. Check your declarations page — it will state whether your UIM coverage is stacked or non-stacked. If it does not say, ask your carrier in writing and request written confirmation of the answer.
Compare Carriers That Write Multi-Vehicle Policies in Oklahoma
Twenty-one carriers write auto insurance in Oklahoma, and UIM pricing varies widely. Some carriers price UIM as a small add-on to liability; others charge a larger percentage of your base premium. When you insure multiple vehicles, the difference compounds across every car on the policy.
Request quotes from at least three carriers, and ask each one to price the policy both with and without UIM. Compare the premium difference against your household's exposure — the number of drivers, the number of vehicles, and the likelihood that you will encounter an underinsured driver. Twelve percent of Oklahoma drivers carry no insurance, and many more carry only the state minimum. Use the comparison tool on this site to request quotes from carriers writing in your county.