Part C Uninsured/Underinsured Motorists

Part C - Uninsured/Underinsured Motorists Coverage

Part C (UM/UIM) protects the insured when the at-fault driver cannot pay. It pays compensatory damages - principally bodily injury, and in some states property damage (UMPD) - that an insured is legally entitled to recover from the owner or operator of an uninsured or underinsured vehicle.

The purpose is to put the insured in the financial position the at-fault driver's liability coverage should have provided. Importantly, fault still matters here: unlike Med Pay, Part C only pays when the other driver is legally liable. If the insured is the at-fault party, Part C does not respond.

Uninsured vs. underinsured

• An uninsured motor vehicle (UM) is one with no liability insurance, one whose insurer denies coverage or is insolvent, or a hit-and-run vehicle whose owner/driver cannot be identified.
• An underinsured motor vehicle (UIM) has liability insurance, but its limits are insufficient to cover the insured's full damages. UIM fills the gap between what the at-fault driver's policy pays and the insured's own UIM limit.

A hit-and-run driver is treated as uninsured. To curb 'phantom vehicle' fraud, most states require either physical contact between the vehicles or independent corroborating evidence that the unidentified vehicle existed.

How UIM offsets work

States use one of two offset models, and the exam wants you to know the 'difference' (limits-offset) model:

• Limits-offset (most common): UIM available = insured's UIM limit minus the at-fault driver's liability limit.
• Damages-offset: UIM available = insured's UIM limit minus the amount actually recovered from the at-fault driver.

Worked example (limits-offset): The insured has $100,000 UIM. The at-fault driver carries only $25,000 in liability limits and pays that $25,000. The insured's total damages are $90,000. The at-fault driver's $25,000 leaves $65,000 unpaid. UIM pays up to $100,000 - $25,000 = $75,000 of additional coverage, so the full remaining $65,000 is paid. The insured is made whole at $90,000 total ($25,000 from the other driver + $65,000 from UIM).

Who is an insured and the limit rules

The Part C definition of insured mirrors the rest of the PAP:

• You and family members for BI sustained in any auto accident caused by an uninsured/underinsured motorist.
• Any other person occupying your covered auto.
• Anyone entitled to recover damages because of the BI to a covered person (e.g., a spouse's loss-of-consortium claim).

Key limit rules:

• UM/UIM limits generally cannot exceed the insured's own liability (Part A) limits.
• The insured must usually notify the insurer and obtain consent before settling with the at-fault party, so the insurer can protect its subrogation rights against that party.
• Many states require carriers to offer UM/UIM equal to liability limits; the insured may reject it only in writing.

UM property damage (UMPD)

In many states a separate Uninsured Motorists Property Damage (UMPD) coverage pays for physical damage to the insured's vehicle caused by an uninsured at-fault driver. UMPD is useful for an insured who carries no collision coverage: instead of paying a collision deductible and pursuing the uninsured driver personally, the insured recovers the vehicle damage through UMPD.

Some states impose a small UMPD deductible (commonly $200-$250) and cap recovery at the actual cash value of the vehicle. Where collision coverage is also carried, the insured typically uses collision first because UMPD often will not apply to a hit-and-run with no identified vehicle. Note that standard UM/UIM as written in the ISO PAP covers bodily injury; property damage under UM is a state-by-state add-on.

Common Part C traps

• Stacking: Some states allow the insured to stack (add together) UM/UIM limits across multiple vehicles or policies; others prohibit anti-stacking clauses. Know your state's rule.
• Settlement without consent can void UM/UIM coverage by destroying the insurer's subrogation right - never let an insured cash the at-fault driver's settlement before notifying the carrier.
• UM does not pay for the insured's own at-fault accidents - it is a third-party-fault coverage even though the insured collects it first-party.
• The at-fault driver's limit, not the amount paid, governs in limits-offset states - a frequent numeric trap.
• Phantom-vehicle hit-and-run claims fail without contact or corroboration in most states.
• UM/UIM is rejected only in writing - if no signed rejection is on file, many states deem UM/UIM included at limits equal to liability.

Uninsured vs. Underinsured — The Core Distinction

Uninsured Motorist (UM) pays the insured's bodily injury (and, where available, property damage) when the at-fault driver has no liability insurance, is a hit-and-run, or whose insurer is insolvent. Underinsured Motorist (UIM) applies when the at-fault driver has insurance but not enough to cover the full injury. UM steps in for the no-coverage driver; UIM steps in for the not-enough-coverage driver. A hit-and-run with no contact (a phantom vehicle) is typically covered under UM only if there is corroborating evidence, depending on state law.

How UIM Offsets Work — Worked Example

UIM is usually written on a difference (offset) basis. The insured carries $100,000 UIM. The at-fault driver carries $25,000 in liability. The insured's injuries are valued at $90,000.

1. Collect the at-fault driver's liability: $25,000.
2. UIM pays the difference up to the UIM limit: $90,000 − $25,000 = $65,000 (within the $100,000 UIM limit).
3. Total recovery = $90,000, fully indemnified.

If the injury were $130,000, UIM would pay $100,000 minus the $25,000 already collected = $75,000, leaving a gap above combined limits. Some states instead use add-on (excess) UIM that stacks on top of the liability rather than offsetting — know which model the question states.

Who Is an Insured and Limit Rules

UM/UIM insures you and family members in any auto and as pedestrians, plus any other person occupying your covered auto. Limits commonly mirror the liability limit but can be lower or rejected in writing where state law permits. Stacking — combining limits across multiple vehicles or policies — is allowed in some states and barred by anti-stacking language in others.

Common Part C Traps

UM/UIM does not pay punitive damages in many states, does not apply to the named insured's own uninsured vehicle (you cannot be your own uninsured motorist), and an insured who settles with the at-fault driver without the insurer's consent can forfeit UIM by destroying the carrier's subrogation rights. The consent-to-settle requirement is a favorite exam trap.