In this guide
What UM and UIM Coverage Is
Uninsured motorist (UM) coverage pays when the at-fault driver has no liability insurance at all. Underinsured motorist (UIM) coverage pays when the at-fault driver has insurance, but their policy limits are too low to fully compensate you. Both coverages are part of your own auto insurance policy — you are making a claim against yourself, not the other driver.
That distinction matters. In a UM/UIM claim, your own insurer has a financial interest in minimizing your recovery. The friendly insurer you’ve paid premiums to for years is now on the other side of the table. Understanding that dynamic is the first step toward handling a UM/UIM claim effectively.
NC Minimum Coverage Requirements
North Carolina requires every driver to carry liability insurance with minimum limits of $30,000 per person / $60,000 per occurrence / $25,000 for property damage. NC also requires insurers to offer uninsured and underinsured motorist coverage at the same limits.
However, drivers can waive UM/UIM coverage in writing. Many do, to lower their premiums. If you have not reviewed your policy recently, you may not know whether you have this coverage or what the limits are. Check before you need it — after a crash is too late to buy it.
The NC minimum limits are low by any standard. A serious crash — one involving surgery, hospitalization, lost wages, and long-term impairment — can easily generate damages of $200,000 or more. A $30,000 UM policy does not come close to making you whole in that scenario.
When UM Coverage Applies
Your UM coverage applies in three main situations:
- Hit and run: The at-fault driver flees and cannot be identified. NC requires physical contact between vehicles for UM hit-and-run coverage — a phantom vehicle that cuts you off without contact typically does not trigger UM coverage.
- Uninsured driver: The at-fault driver is identified but carries no liability insurance, or their policy is void at the time of the crash.
- Insolvent insurer: The at-fault driver’s insurer becomes insolvent before paying the claim. NC has a guaranty fund, but UM coverage provides an additional layer.
For hit-and-run claims, prompt police reporting and medical treatment are essential. Your insurer will scrutinize these claims for evidence of the crash and your injuries.
How UIM Fills the Gap
UIM coverage fills the gap between the at-fault driver’s liability limits and your actual damages. The calculation is straightforward in concept but frequently disputed in practice.
Example: The at-fault driver carries $30,000 in liability coverage. Your damages are $120,000. Your UIM limits are $100,000. The at-fault driver’s insurer pays $30,000. Your UIM insurer pays the next $70,000 (up to your $100,000 limit, offset by the $30,000 already paid), for a total recovery of $100,000. You remain $20,000 short of full compensation.
NC uses an "offset" method — UIM limits are reduced by the amount recovered from the at-fault driver. Some states use an "excess" method where UIM pays the full limits minus the at-fault driver’s payment. NC’s offset method makes UIM coverage less valuable than it appears on paper.
Before accepting the at-fault driver’s policy limits, you must notify your UIM insurer and give them an opportunity to consent to the settlement or advance the liability amount themselves. Failing to do this can waive your UIM claim. This is a trap that catches even experienced claimants.
Stacking Your Policies
Stacking means combining UM/UIM limits across multiple vehicles or multiple policies to increase the coverage available. NC permits inter-policy stacking (combining limits from separate policies) but restricts intra-policy stacking (multiplying limits by the number of vehicles on one policy).
If you have three vehicles insured under the same policy with $100,000 UIM limits each, you generally cannot stack them to get $300,000. But if you have a personal auto policy with $100,000 UIM limits and a separate umbrella policy with additional UM/UIM, stacking those may be possible.
The stacking rules are technical and depend on specific policy language. If your damages exceed your primary UM/UIM limits, a careful review of all applicable policies is essential before settling.
Suing Your Own Insurer
UM/UIM claims are governed by your policy contract. If your insurer disputes liability, denies coverage, or disputes the value of your claim, your remedies are contractual. In NC, you can arbitrate UM/UIM disputes if your policy contains an arbitration clause — many do. If not, you can sue your own insurer for breach of contract.
NC also recognizes bad-faith claims against insurers who unreasonably deny or delay valid UM/UIM claims. The NC Unfair Trade Practices Act provides additional remedies, including treble damages and attorney fees, for insurer misconduct. These claims are fact-intensive and require documentation of the insurer’s handling of your claim from the first notice.
What to Document
The same documentation that supports a liability claim also supports a UM/UIM claim: police reports, medical records, photos, witness statements, and evidence of the at-fault driver’s insurance status. Additionally, for UM/UIM claims, document your own policy carefully — declaration pages, any written waivers, and correspondence with your insurer.
For UIM claims, the at-fault driver’s policy declaration page is critical. You need to know their exact limits before structuring a settlement. Request it early and in writing.
Maximizing a UM/UIM Claim
The most common mistake in UM/UIM claims is settling the liability case without first securing your right to pursue UIM. Once you accept the at-fault driver’s limits and release them, you lose leverage over your own insurer unless you followed the consent procedures required by your policy.
The second most common mistake is accepting your insurer’s first valuation of the UIM claim. Your insurer has the same incentive to minimize your damages that a liability insurer does. Build and document your damages the same way you would for a liability claim. The process is adversarial even though you’re dealing with your own company.