Boston Car Accident Lawyer Blog
In 2025, Massachusetts raised its minimum compulsory auto insurance limits, a meaningful change that affects many claims in 2026. The state’s guidance explains that, for policies written or renewed on or after July 1, 2025, mandatory minimums increased for key coverages, such as Bodily Injury to Others and Property Damage.
This was a positive development. But it didn’t solve the biggest problem in serious car crashes: minimum limits are still minimums, and severe injuries routinely cost far more than any minimum policy can pay. That is why underinsured motorist coverage, often called UIM (and closely related to uninsured motorist coverage, UM), becomes the difference between a partial recovery and a recovery that actually matches the harm.
The uncomfortable truth is that the legal minimum does not mean it is enough.
When a crash causes minor injuries, the at-fault driver’s policy may cover the damage without much friction. But once injuries involve surgery, long rehabilitation, permanent impairment, extended time off work, or any future care, it’s common for the claim value to outgrow the at-fault driver’s liability limits.
The 2025 reform increased minimums, but catastrophic losses can exceed those numbers almost immediately. Even a moderate injury can result in medical bills and wage loss that far exceed what many drivers carry. In 2026 claims, you can expect insurers to cite the updated minimums as if they resolve the problem. In reality, the updated minimums raise the floor; they do not eliminate underinsurance.
What UM/UIM actually is, and why it’s often the most important coverage you own
UM and UIM are often described as protection for when the other driver can’t pay.” That’s directionally correct, but it understates how the coverage works in practice.
UM coverage is designed for situations where the at-fault driver has no applicable insurance. UIM is designed for situations where the at-fault driver has insurance, but not enough to cover what you suffered. Mass.gov’s auto insurance overview discusses uninsured auto bodily injury coverage as part of the required framework and explains the basic function of these coverages in Massachusetts.
In a serious crash, UM/UIM is not an extra. It’s the layer that determines whether you can pay medical bills without sacrificing your future, whether you can replace lost income, and whether the compensation reflects the permanent consequences of the injuries.
Why UIM claims feel strange: you’re fighting your own insurer
One of the biggest emotional shocks for injured people is that a UIM claim is often asserted against the policy you pay for. Even though UIM is your coverage, your insurer still has the right to dispute liability and damages because it is the party paying benefits.
That dynamic drives certain predictable strategies. Adjusters often demand recorded statements early. They may argue you were partially at fault. They may question treatment choices. They may insist you could return to work sooner. None of this means you don’t have a claim; it means you need to approach UIM the way you’d approach litigation, with evidence, discipline, and consistency.
The 2025 limit change: what shifted and what didn’t
The Massachusetts government’s published materials make clear that mandatory minimum amounts increased for policies written or renewed on or after July 1, 2025.
What changed is the baseline amount that many insured drivers now carry. What did not change is the reality that many drivers still carry only the minimum, and many serious injury cases exceed those minimums by multiples. In other words, the need for UIM remains, and in 2026, it remains a common make-or-break factor in injury recovery.
The math of underinsurance and how a strong case can become a weak payment
Imagine a crash that causes a spinal injury requiring surgery and months off work. The injury may be worth hundreds of thousands of dollars when you account for medical treatment, wage loss, and future limitations.
If the at-fault driver has low limits, the liability carrier may tender its policy limit quickly, not because the case is only worth that, but because it’s the maximum the policy can pay. Without UIM, the claim simply stops there, regardless of the true harm.
With UIM, there is at least a path to pursue the gap, up to the amount you purchased. But that path has rules, and failing to follow them can create avoidable obstacles.
A key 2026 issue that offsets the real value of your UIM limits
In Massachusetts, UIM benefits may be offset depending on policy language and payments already received. Massachusetts practitioners frequently discuss how insurers apply offsets against UIM payments based on what was recovered from the at-fault driver.
The practical takeaway is that you should not assume your UIM limit automatically stacks on top of the at-fault driver’s payment. The way the policy is written and applied matters. This is a common reason people feel blindsided late in a claim: they believed they had a large UIM safety net, but didn’t understand how the UIM carrier would calculate the net benefit.
Why can’t you just take the other driver’s limits and move on?
Underinsured claims often require careful handling when settling with the at-fault driver. In Massachusetts practice, it is commonly emphasized that you should obtain your UIM carrier’s permission to settle with the negligent driver, and that the UIM claim then proceeds separately, sometimes into arbitration, depending on policy terms.
The point is not bureaucratic. The point is protecting your ability to pursue UIM benefits without giving your insurer a technical argument that you prejudiced its rights.
Comparative negligence still matters in UM/UIM.
Even with strong coverage, fault disputes can reduce value. Massachusetts follows a modified comparative negligence approach codified in Chapter 231, Section 85.
In a UIM case, if the insurer can credibly argue you were partially at fault, a lane change, a speed argument, or a distraction allegation, the insurer may use that to reduce the payment value or fight the claim altogether. That is why crash reconstruction evidence, vehicle damage evidence, medical chronology, and consistent statements matter so much in UM/UIM claims.
What makes a UIM claim stronger with evidence that speaks the insurer’s language
UIM cases are won by turning the injury story into proof: proof of fault, proof of injury, proof of consequences.
That usually means you want a clean, documented chain from collision to diagnosis to treatment to restriction. Imaging and specialist opinions matter. Work restrictions and wage-loss documentation matter. A gap-riddled medical timeline is a gift to the defense. If you have a concussion, cognitive symptoms should be documented early and followed consistently. If you have orthopedic injuries, providers should track and describe objective findings and functional limits.
The more your case relies on I feel pain, the more it invites argument. The more it relies on here is the objective record of what happened and what it changed, the more leverage you have.
What to do if you suspect the other driver is underinsured
If the at-fault driver’s carrier is talking about tendering limits early, that is a sign the policy is small relative to the harm. If your injuries are serious, you should treat UIM as part of the plan immediately, not as an afterthought.
You also should not let an insurer define your case by the policy limit. A policy limit is a ceiling, not a measure of the case’s true value. UIM exists precisely because low limits are common, and serious injuries happen anyway.
Talk to Jeffrey Glassman Injury Lawyers about UM/UIM before you get boxed in
UM/UIM is one of the most misunderstood parts of Massachusetts injury practice, and the 2025 minimum limit increase has created a new set of “false assumptions” in 2026 cases. Massachusetts’ own materials confirm the 2025 increase in required minimums, but that change does not eliminate underinsurance.
If a low-limit driver hit you, or you suspect the other driver can’t fully pay for the harm you suffered, talk to counsel early, before you sign releases, give recorded statements that can be used against you, or settle in a way that complicates UIM recovery.
Call (617) 777-7777 for a free consultation. We’ll review the at-fault driver’s coverage, your UM/UIM options, and the evidence needed to pursue the full value of your claim.