Connecticut Uninsured Motorist Statute: How UM Coverage Works in CT
Connecticut requires all auto insurance policies to include uninsured motorist (UM) coverage — and that requirement shapes what happens when a crash involves a driver who has no insurance, or whose coverage isn't enough to cover the full cost of someone's injuries.
Here's how the statute works, what it covers, and what variables determine how any individual claim plays out.
What Connecticut's Uninsured Motorist Law Requires
Under Connecticut General Statutes § 38a-336, insurers in the state must offer uninsured and underinsured motorist coverage as part of every private passenger auto policy. The coverage is mandatory to offer — but more specifically, the default UM/UIM limits must match your liability limits unless you affirmatively choose lower limits in writing.
That's a meaningful distinction. In many states, UM coverage defaults to minimum levels. In Connecticut, if you carry $100,000/$300,000 in liability coverage, your insurer must automatically match that with UM/UIM coverage unless you sign a written rejection or reduction form.
Uninsured motorist coverage applies when the at-fault driver has no insurance at all — or when a hit-and-run driver cannot be identified.
Underinsured motorist (UIM) coverage applies when the at-fault driver has insurance, but their policy limits are too low to fully compensate for your damages.
Both fall under the same statutory framework in Connecticut.
What UM/UIM Coverage Generally Pays For
Connecticut's UM/UIM coverage is designed to put the injured party in roughly the same position they would have been in if the at-fault driver had carried adequate insurance. In practice, that means it can cover:
- Medical expenses — hospital bills, surgery, rehabilitation, ongoing treatment
- Lost wages — income lost during recovery
- Pain and suffering — non-economic damages tied to the injury's impact on daily life
- Permanent disability or disfigurement — where applicable
Property damage is handled separately. Connecticut does allow UM property damage claims in certain circumstances, but the rules around this are more limited and policy-specific than the bodily injury side of UM coverage.
How a UM/UIM Claim Works in Connecticut
When you're injured by an uninsured or underinsured driver, you file a claim with your own insurance company — not the at-fault driver's insurer. This makes it a first-party claim, even though it arises from someone else's negligence.
That distinction matters because your insurer steps into the position of the at-fault driver for purposes of evaluating the claim. They'll investigate liability, review your medical records and treatment history, assess your documented losses, and negotiate toward a settlement figure — or dispute the claim.
⚖️ One important feature of Connecticut UM/UIM law: if you and your insurer can't agree on the value of the claim, the statute allows either party to demand arbitration. The arbitration process is governed by the policy terms and state law, and the outcome can significantly affect what a claimant ultimately receives.
The Role of the At-Fault Driver's Coverage in UIM Claims
For underinsured claims (as opposed to uninsured), the process involves an extra step. Before your UIM coverage kicks in, you typically must first exhaust the at-fault driver's liability policy — meaning you settle with or obtain a judgment against that driver's insurer up to their policy limit.
Connecticut law requires you to notify your own insurer before settling with the at-fault driver's insurer. Failing to do this can jeopardize your UIM claim. Insurers have a right to protect their subrogation interests — the ability to seek reimbursement from the at-fault driver after paying your claim.
Variables That Shape UM/UIM Outcomes 🔍
No two claims resolve the same way. Outcomes depend heavily on:
| Variable | Why It Matters |
|---|---|
| Coverage limits you purchased | Your UM/UIM payout is capped at your policy limits |
| Whether you signed a reduction form | Affects whether your UM/UIM limits match your liability limits |
| Severity and documentation of injuries | More serious, well-documented injuries typically produce larger claims |
| Treatment timeline and records | Gaps in care can be used to challenge the value of a claim |
| Whether the at-fault driver was identified | Hit-and-run claims have different procedural requirements |
| Arbitration vs. litigation | How disputes are resolved can affect timing and outcome |
| Other available coverage | Health insurance liens, MedPay, and PIP may interact with UM recovery |
Connecticut is an at-fault (tort) state, not a no-fault state, so there's no personal injury protection (PIP) requirement. Injured parties typically pursue the at-fault driver's liability insurance first — and turn to UM/UIM only when that coverage is absent or insufficient.
Stacking and Policy Structure
Some states allow stacking — combining UM/UIM limits across multiple vehicles or policies to increase available coverage. Connecticut's rules on stacking are policy- and fact-specific. Whether stacking is available in a given situation depends on how the policy is written and the specific circumstances of the claim.
Connecticut vs. Other States
Connecticut's mandatory matching-limits requirement makes it more protective than states where UM/UIM coverage defaults to minimum levels. But the coverage still has a ceiling — your limits — and the claims process still involves negotiation, documentation, and in many cases, arbitration. States with no-fault systems handle post-crash recovery very differently, which is why comparing what a friend received in another state often produces misleading expectations.
How a Connecticut UM/UIM claim actually resolves depends on the specific policy language, the documented injuries and losses, what the at-fault driver's coverage looked like, and how the claim is presented and pursued — factors that aren't visible from the outside.
