This scenario plays out more often than most New Mexico drivers realize. In 2023, an estimated 15.4% of drivers nationwide were uninsured, but New Mexico's rate was far worse. At 24.1%, New Mexico ranked second-highest in the country, trailing only Mississippi, according to the Insurance Research Council.
That means roughly one in four drivers you share the road with may not have coverage. This guide breaks down what uninsured and underinsured motorist coverage actually does, whether it's required in New Mexico, and how to pick the right limits for your situation.
Key Takeaways
- Uninsured motorist (UM) coverage protects you when the at-fault driver has zero insurance, including hit-and-run cases
- If the at-fault driver's policy limits fall short of your damages, underinsured motorist (UIM) coverage fills the gap
- New Mexico insurers must offer UM/UIM on every policy, but drivers can reject it in writing
- UM/UIM can pay for medical bills, lost wages, pain and suffering, and sometimes vehicle repairs
- Many agents recommend matching your UM/UIM limits to your liability limits
What Is Uninsured and Underinsured Motorist Coverage?
These two coverages work as a team, but they respond to different situations.
Uninsured motorist (UM) coverage steps in when the driver who hit you has no liability insurance whatsoever. This includes hit-and-run accidents, since the National Association of Insurance Commissioners (NAIC) treats an unidentified hit-and-run driver as effectively uninsured for claims purposes.
Underinsured motorist (UIM) coverage applies when the at-fault driver has insurance, but their policy limits aren't enough to cover your actual damages.
UM vs. UIM at a Glance
| Feature | UM Coverage | UIM Coverage |
|---|---|---|
| Triggered by | Driver with no insurance | Driver with insufficient insurance |
| Hit-and-run coverage | Yes | Not applicable |
| Pays for | Medical bills, lost wages, pain and suffering | Same, up to your policy limit minus their coverage |
Here's a real-world example. Say you're hit by a driver carrying only $25,000 in liability coverage, but your medical bills and lost wages total $60,000. Your UIM coverage would make up that $35,000 difference, up to whatever limit you've selected on your own policy.
New Mexico drivers face this scenario more often than they'd expect, which is why state law bundles UIM into UM coverage automatically unless you reject it. Under NMSA 66-5-301, an "underinsured motorist" is legally defined as one whose liability limits fall below your own UM limits.
Liability insurance only protects other people from mistakes you make behind the wheel. It does nothing for you if someone else causes the crash and can't pay, which is exactly why UM/UIM exists: it flips that protection back toward you and your passengers.
UM/UIM is not collision coverage, and the difference matters. Collision pays for your vehicle regardless of who caused the accident. UM/UIM specifically targets situations where the other driver is at fault but can't (or won't) pay.
What Does UM/UIM Coverage Actually Pay For?
UM/UIM coverage splits into four components, each addressing a different type of loss.
Bodily Injury Protection
Uninsured Motorist Bodily Injury (UMBI) covers you and your passengers when an uninsured driver causes the crash. This typically includes:
- Medical expenses
- Lost wages
- Pain and suffering
- Funeral expenses, in the worst cases
Underinsured Motorist Bodily Injury (UIMBI) works the same way, except it applies when the at-fault driver has some insurance that simply isn't enough. According to NerdWallet's breakdown of underinsured motorist coverage, both UMBI and UIMBI typically come with no deductible.
Property Damage Protection
Uninsured Motorist Property Damage (UMPD) and its underinsured counterpart, UIMPD, pay for repairs to your vehicle. Unlike bodily injury claims, property damage claims often do carry a deductible.
In New Mexico specifically, state law caps that property damage deductible at $250. Insurers can't exclude more than that amount from a covered loss.
Hit-and-run accidents raise a related question, since there's no other driver's insurance to pursue:
- Hit-and-run bodily injury claims are generally covered under UM, since NAIC guidance treats unknown drivers as uninsured
- Hit-and-run property damage (UMPD) treatment varies more by state and policy, so check your declarations page to confirm your specific terms
- UM/UIM does not cover damage to someone else's property — it's built to protect you, your passengers, and your own vehicle, not third parties
If your declarations page doesn't clearly list all four coverages, a quick call to your agent will confirm exactly what you're carrying before you ever need to file a claim.
Is Uninsured/Underinsured Motorist Coverage Required in New Mexico?
Here's where things get a little confusing for a lot of drivers: New Mexico requires insurers to offer UM/UIM, but it doesn't require you to keep it.
Under state law, every auto policy sold in New Mexico must include UM/UIM protection at least at the statutory minimum, unless the policyholder rejects it in writing. A 2025 New Mexico Office of the Superintendent of Insurance bulletin confirms this rejection must happen per vehicle and in writing.
Compare that to New Mexico's baseline liability requirements, which every driver must carry:
- $25,000 bodily injury liability per person
- $50,000 bodily injury liability per accident
- $10,000 property damage liability per accident
These numbers, sometimes written as 25/50/10, are legal minimums, not recommendations. Many attorneys and agents consider them too low to cover a serious accident.
Because purchasing UM/UIM isn't mandatory, only the offer is, plenty of drivers unknowingly go without it. This creates real exposure on New Mexico roads, especially considering:
- New Mexico's 24.1% estimated uninsured driver rate, one of the highest in the nation
- Long rural highway stretches where help and witnesses can be scarce
- Frequent cross-state travel through Texas, Colorado, and Arizona, where coverage requirements differ
If you decline UM/UIM, you assume full financial risk if an uninsured or underinsured driver hits you. There's no safety net beyond what comes out of your own pocket.
Quick check: Pull out your policy's declarations page. If you don't see UM/UIM listed, you may have waived it without realizing the risk you took on.
How Much UM/UIM Coverage Should You Carry?
Once you know UM/UIM is optional, the next question is how much to buy.
The common rule of thumb: match your UM/UIM bodily injury limits to your liability limits. If you carry $100,000/$300,000 in liability coverage, many agents suggest carrying the same in UM/UIM. The logic is straightforward: it prevents a scenario where you're better protected against claims you cause than against claims made against an uninsured driver who hits you.
For property damage limits, the calculation shifts slightly:
- If you carry collision coverage, your vehicle damage is likely already covered regardless of fault, so UMPD/UIMPD matters less
- If you don't carry collision, your UMPD/UIMPD limit should reflect what it would actually cost to repair or replace your vehicle
Every driver's risk profile looks different, and several factors shape the right number for you:
- Commute patterns — daily drives on I-25 between Santa Fe and Albuquerque carry different exposure than mostly around-town driving
- Vehicle value — higher-value vehicles need higher UMPD/UIMPD limits to fully cover replacement costs
- Assets to protect — the more you have at stake in a lawsuit, the more bodily injury coverage makes sense
- Rural highway driving — more time on rural roads often means higher risk of encountering uninsured drivers
This is exactly the kind of decision worth talking through rather than guessing at.
At Jacobs Family Insurance in Santa Fe, our agents sit down with clients to review their specific situation and recommend UM/UIM limits backed by Allstate's coverage options that actually fit. We're neighbors who've been doing this in northern New Mexico for over a decade.
What Happens If You're Hit by an Uninsured Driver?
Knowing the coverage exists is one thing. Knowing what to actually do in the moment is another.
- Call the police and report the accident. A police report documents the crash and, if the other driver is uninsured, becomes important evidence for your claim.
- Gather information from the other driver, or note clearly if it's a hit-and-run and you couldn't get their details.
- Contact your insurer right away. Don't wait days to report — prompt notice helps your claim move faster.
- Let your insurer investigate. They'll need to confirm the other driver was actually uninsured or underinsured before your UM/UIM claim can move forward.
- Provide documentation of medical treatment, lost wages, and vehicle repair estimates as you gather them.
Step four — the investigation — often surprises people. Your insurer isn't just taking your word for it; they're verifying the other driver's insurance status, which can take time, especially in hit-and-run situations where identifying the driver is part of the challenge.
Having a family-owned local agency in your corner during this process makes a real difference. At Jacobs Family Insurance, we know New Mexico's UM/UIM rules and the local claims landscape firsthand. That personal attention can help you avoid leaving benefits on the table because a form wasn't filed correctly or a deadline was missed.
Frequently Asked Questions
If I'm hit by an uninsured driver, how does uninsured motorist coverage help?
UM coverage steps in to pay for your medical expenses, lost wages, and sometimes vehicle damage that the uninsured driver would otherwise owe you. Without it, you'd have to cover those costs yourself or pursue the driver directly, which is often difficult if they have no assets.
Do I really need uninsured motorist coverage in New Mexico?
New Mexico law doesn't require it, but it's strongly recommended. With roughly one in four New Mexico drivers estimated to be uninsured, going without this coverage leaves you significantly exposed financially.
Why should I buy uninsured and underinsured motorist coverage?
Liability insurance only protects other people from damage you cause. UM/UIM is often the only coverage protecting you and your passengers when the at-fault driver simply can't pay for your losses.
What does "uninsured motorist only" mean?
This refers to coverage that protects you against drivers with zero insurance, but not drivers whose insurance is simply insufficient. In New Mexico, UM coverage typically includes UIM protection by default.
Is there a deductible for uninsured motorist claims?
Bodily injury claims usually have no deductible. Property damage claims may carry one, and in New Mexico, state law caps that deductible at $250.
How much does adding UM/UIM coverage typically cost?
UM/UIM is an affordable add-on relative to the protection it provides. Costs vary by selected limits, so a personalized quote from a local agent is the best way to see exact pricing.
Ready to check whether your policy has UM/UIM coverage, or whether your current limits fit your commute and vehicle? Jacobs Family Insurance in Santa Fe can walk through your declarations page and talk through real numbers, not generic advice. Call (505) 557-2067 or stop by 1547 South St. Francis Drive.
