NJ uninsured motorist claim help: how UM and UIM coverage work after a car accident

Does uninsured motorist coverage pay if the other insurer denies fault?

No. DOBI treats a liability denial as a fault dispute, not missing coverage, so UM does not step in.

A coverage denial works the other way. Once an insurer denies coverage in writing, for example because the car was driven without the owner's permission, that driver can count as uninsured for your UM claim. Appeals, DOBI complaints and arbitration after any denial are in NJ car insurance claim denied.

Either way, your insurer "stands in the shoes" of the other driver. Under New Jersey's comparative negligence law you recover only if you are not more at fault, and your own share reduces the payment. See how New Jersey splits fault in real cases.²

How much does underinsured motorist coverage pay?

UIM pays up to the difference between your UIM limit and the other driver's liability limit. It does not stack on top. DOBI gives this example:

The at-fault policy's date sets the ceiling. With a $100,000 UIM limit, the most UIM can add is $65,000 against a 2026 policy at the $35,000 minimum, or $75,000 against a 2023 to 2025 policy at $25,000.

Which minimum applies to your accident date is covered in NJ minimum car insurance limits for 2026.³

Is uninsured motorist coverage mandatory in NJ?

Yes, on a Standard Policy, which must include a minimum amount of UM and UIM coverage. The Basic Policy and the Special Automobile Insurance Policy (SAIP) include none. What those cheaper policies do pay is in Basic Policy vs Standard Policy after a crash.

How much UM/UIM coverage should you carry in New Jersey?

A Standard Policy must carry at least the required minimum, and you can buy more up to, but not above, your own liability limits. The minimum itself is listed on our NJ car insurance minimum limits for 2026 page.

DOBI's 2026 options chart shows UM/UIM choices of $95,000 / $100,000, $300,000 and $500,000, with $300,000 the most common. A Basic Policy has no UM or UIM at any level.⁵

What does uninsured motorist coverage not cover?

It does not pay when the other driver was not legally at fault, and it leaves out these losses:

• The uninsured driver. UM pays you, not the driver who had no insurance. What that driver can still claim after being hit is on hurt driving your own uninsured car in NJ.
• Vehicle damage from a car that fled without touching you. That property damage claim needs the vehicle identified; see the New Jersey hit-and-run guide.
• Your first medical bills. PIP pays those whoever was at fault; see PIP coverage limits and medical bills.
• A release you sign without reserving UIM rights. It can end the UIM claim; see the release ruling on appeal.

An injury claim can also fail on the permanent-injury question. How that played out in UM and UIM appeals is on our page about UM claims and the permanent-injury rule.⁶

Can your insurer cut your UM/UIM limit for a different driver?

Not in the appeals we coded: both step-down rulings kept the limit on the declarations page.

The clauses, the dollar amounts and the commercial truck exception are set out in NJ uninsured and underinsured motorist appeals: what 13 decisions show. Five of those 13 came from Middlesex County, whose local numbers are on Middlesex County car accident help.⁷

How do you sue an underinsured driver?

Claim the driver's own policy first, then claim the rest as UIM from your insurer, with its permission before any release.

1. Keep every letter in full. Save the other insurer's denial or limits letter with its date, claim number and stated reason.
2. Pull the policy for the accident date. Use the declarations page and endorsements in force that day, not a later renewal.
3. Get permission before you sign a release. Most insurers require it. Read the questions to ask before accepting a settlement offer.
4. Tell your own insurer early and send it only what the other insurer leaves unpaid.

Step 3 is where claims die: a release signed without reserving rights can end the UIM claim, as the release ruling on appeal shows.⁸

What is the phone number for an NJ uninsured motorist claim?

Call your own insurance company's claims line, not the MVC: UM and UIM are claims on your own policy.

If it refuses or delays, your policy's arbitration comes first, then the insurer's internal appeal, then DOBI's Insurance Claims Ombudsman at 1-800-446-7467. A bad-faith claim usually waits until the UIM claim is decided; see suing a UIM carrier for bad faith.

More guides are on the New Jersey car accident hub.⁹