Uninsured / Underinsured Motorist (UM/UIM) Motorcycle Coverage — Insurance Glossary

What is UM/UIM Motorcycle Coverage?

In plain English: A $1,500 beater Honda Civic with no insurance runs a red light and T-bones you at 45 mph. You spend 8 days in the ICU, have 3 surgeries, miss 6 months of work, and are left with permanent nerve damage in your arm. Total bills + lost income = $780,000. If you only have liability-only motorcycle insurance, your policy pays ZERO because the other guy is at fault. The other driver has $0 in assets, no insurance, and files for bankruptcy. You get $0 and are on the hook for all $780,000. If you have UM/UIM with $500k limits? Your motorcycle insurance company writes YOU a check for $500,000 — like the other guy actually had a real policy. That’s what UM/UIM does, and it’s why every single motorcycle rider in America should carry the maximum UM/UIM limits their carrier offers, no exceptions.

Key Takeaways

In 2023, 15.4% of US drivers were uninsured, according to the Insurance Research Council’s 2025 study. IRC also puts one in three drivers (33.4%) as either uninsured or underinsured — meaning roughly a third of the drivers you share the road with cannot compensate you adequately if they hurt you
Motorcyclists are 28x more likely per vehicle-mile to suffer a FATAL injury in a crash (NHTSA 2024) — so when an uninsured driver hits you, the damages are typically catastrophic, not a fender-bender
UM = coverage when the other driver has NO insurance or it’s a hit-and-run (most states cover hit-and-run under UM)
UIM = coverage when the other driver HAS insurance but their liability limit ($15k/$25k/etc.) is LESS than your actual damages
Motorcycle UM/UIM usually covers bodily injury (BI) for you + your passenger; UM property damage (UMPD) for bike damage is optional in some states and bundled in others
Recommended limit: At LEAST $250,000 per person / $500,000 per accident for UM/UIM BI, regardless of what your liability limits are

How Uninsured / Underinsured Motorist Coverage Works on Motorcycles

UM/UIM has two sub-components with separate triggers. For a rider, understanding both will save you hundreds of thousands of dollars when it matters most:

1. Uninsured Motorist Bodily Injury (UM BI)

Pays when the at-fault driver has zero liability insurance, when the driver’s identity is unknown (hit-and-run), or when the at-fault carrier becomes insolvent (goes bankrupt mid-claim). Covers your: ambulance bills, ER/surgery/hospital stays, rehab/PT, prescription pain medication, prosthetics, lost wages (past AND future estimated), pain and suffering, emotional distress, loss of consortium, permanent disability, and funeral/wrongful death costs if you’re killed.

Worked example — UM where the driver is never found: A hit-and-run leaves no one to sue. With no at-fault driver to collect from, the only source of compensation is your own policy’s uninsured motorist coverage — which is why UM is written to respond when the other driver has no insurance or cannot be identified. The payout is capped at the UM limit you bought, and on a serious injury that limit is reached long before the damages are. Everything above it falls to health insurance, MedPay, and the rider personally. That is the argument for setting UM limits at the same level as your liability limits rather than at the state minimum.

2. Underinsured Motorist Bodily Injury (UIM BI)

Pays the GAP between the at-fault driver’s too-low liability limit and your actual total damages. This happens MORE often than true UM cases because most drivers carry pathetic state-minimum limits (15/30 or 25/50) that don’t even cover one week in the ICU.

Worked example — UIM where the driver is underinsured: The driver is identified and insured, but only at the state minimum. Their insurer pays their limit and no more — that is the ceiling of their policy, whatever the size of your injury. Underinsured motorist coverage then responds for the gap between that payment and your own UIM limit. The practical consequence is that a minimum-limits driver is only marginally better protected than an uninsured one: in both cases it is your own UIM limit, not theirs, that determines what you can recover.

3. Uninsured Motorist Property Damage (UMPD)

Pays for repair or replacement of YOUR motorcycle when the at-fault driver has no insurance. UMPD usually has a small deductible ($200-$250, often LOWER than your collision deductible) and pays up to the limit you choose ($10k-$50k common). In some states UMPD is bundled with UM BI; in others you must buy it separately. If you already have strong collision coverage, there’s overlap — but UMPD’s lower deductible usually makes it worth the tiny extra premium.

UM/UIM Cost and Pricing for Motorcycles

One of the best-kept secrets in motorcycle insurance is that UM/UIM is EXTREMELY cheap relative to the risk it covers. The average motorcyclist can add $250k/$500k UM BI + $25k UMPD for roughly $80 to $220 per year in additional premium. For perspective, that’s about $6-$18 per month for a coverage that can pay out a quarter-million dollars. Here’s the 2026 national tier pricing:

UM/UIM BI Limit (Per Person / Per Accident)	Typical Annual Cost (Added Premium)	Monthly Cost	Recommendation
$25,000 / $50,000	$24 - $55	$2 - $5	❌ Never enough for a motorcycle injury — avoid
$100,000 / $300,000	$55 - $130	$5 - $11	⚠️ Bare minimum acceptable
$250,000 / $500,000	$80 - $220	$7 - $18	✅ Recommended for ALL riders
$500,000 / $1,000,000	$140 - $380	$12 - $32	✅✅ HIGHLY recommended for anyone earning >$75k/yr or with a family
$1,000,000 CSL (Combined Single Limit)	$240 - $550	$20 - $46	✅✅✅ Best if carrier offers it; includes excess UIM stacking
+ UMPD $25,000 bike damage	$15 - $40 additional	$1 - $4	✅ Add this always (lower ded than collision usually)

UM/UIM for Motorcycles vs. UM/UIM for Auto Policies

Feature	Auto UM/UIM	Motorcycle UM/UIM
Claim frequency	~1 claim per 175 auto policy years	~1 claim per 22 motorcycle policy years (8x more frequent)
Average claim payout (BI)	$32,000 (IRC 2025)	$128,000 (Progressive internal data 2025) (4x higher)
Hit-and-run coverage	Yes (most states)	Yes (same states, but HIGHER % of mc accidents are hit-and-run)
Stacking allowed?	Varies by state (many auto no-stack states)	More likely to allow inter-policy stacking with auto UM — most states permit it in some form
UMPD overlap with Collision	Low — cars are not totaled as often	Much higher — motorcycles are written off far more often than cars
Cost per $100k coverage	$28 - $50 per year	$30 - $55 per year (almost the same, despite 8x higher risk — meaning it’s grossly underpriced for the value you get)

Frequently Asked Questions (FAQ)

Is UM/UIM actually required for motorcycles? Can I skip it if I have good health insurance and collision?

Twenty states and the District of Columbia mandate UM/UIM coverage; everywhere else it is optional. That is the reason to buy it deliberately rather than by default. Health insurance covers medical bills only — not lost wages, not pain and suffering, not permanent disability, and not the future treatment a health plan may decline. Collision covers the bike, not your body. UM/UIM is the only coverage on a motorcycle policy that replaces income and pays for the consequences of being hit by a driver who cannot pay. If you carry it only because your state requires it, you are relying on your state’s minimum rather than on your own exposure.

Does UM/UIM cover hit-and-run accidents where they never find the other driver?

Yes in 48 US states for UM BI bodily injury. The two states that EXCLUDE hit-and-run from UM are Maryland and Vermont (they require you to identify the vehicle or driver). If you live in MD or VT, this makes UM/UIM even MORE important because you’re relying on it for cases where you DO identify the uninsured driver, and you must also carry extra MedPay and strong health insurance to cover the hit-and-run gap. Everywhere else? Hit-and-run with no ID’d driver = standard UM BI claim. Just make sure you get a police report immediately, witness statements, and any store/camera footage you can — the carrier will want evidence that another vehicle actually caused the crash (not a single-vehicle fall you’re misrepresenting).

What is “stacking” of UM/UIM, and should I always opt in if offered?

“Stacking” means you can COMBINE the UM/UIM limits from MULTIPLE vehicles on the same policy, or across multiple policies you own, to cover a single motorcycle claim. Example: you have 3 cars on your auto policy with 250/500 UM each, plus your motorcycle with 250/500 UM. If a car hits you on the bike and you’re badly injured, “stacked” coverage lets you access $250k × 4 = a full $1,000,000 in UM BI coverage. 42 US states allow stacking in some form, while the other 8 have anti-stacking laws. The premium surcharge for a stacking election is usually only 10-20% more than non-stacked UM. Always opt in. Stacking is single-handedly the most powerful wealth-protection tool a motorcycle enthusiast with multiple vehicles can have. Ask your agent explicitly: “Does my motorcycle UM/UIM allow inter-policy stacking with my auto policy’s UM/UIM? And is intra-policy stacking active if I have more than one motorcycle?”

Should my UM/UIM limits match my liability limits? Or can I have higher UM than liability?

Conventional wisdom says “match UM with liability,” but that advice is for CARS, not motorcycles. For motorcycle riders, YOUR UM limit is more important than YOUR liability limit because you are 28x more likely to be the INJURED party than the party causing the massive injury. The correct rule is: UM/UIM limits should be AT LEAST your liability limits, and ideally HIGHER if you can afford it. If you carry 100/300 liability because you have modest assets, carry 250/500 UM/UIM if the carrier allows asymmetric limits. Many do. The extra premium for higher UM than liability is usually small — $30-$80 per year. If a carrier forces you to match limits (some do), raise both liability AND UM to 250/500. The total premium difference is negligible vs. the exposure.

What happens if the uninsured driver that hit me actually has hidden assets? Can my insurance company subrogate and get my deductible back?

Yes — after your carrier pays you the UM benefit, they “step into your shoes” legally and can sue the uninsured driver personally to recover every dollar they paid out, plus interest and court costs. This is called subrogation. If the uninsured driver actually has hidden money (a job, a house, savings), your carrier will aggressively pursue collections including wage garnishment, bank levies, and liens on property. Most of the time, truly uninsured drivers are judgment-proof (no job, no assets, bankruptcy history), so carriers don’t recover much. But the key point: YOU don’t have to do anything. Your carrier handles all collection efforts. If they recover anything, they usually refund your deductible first before keeping the rest. You already got paid — the subrogation process is 100% their problem, not yours.

Do I need UIM Property Damage for my bike if I already have full Collision coverage?

Usually yes, and here’s why: UMPD almost always has a LOWER deductible ($100-$250) than your standard collision deductible ($500-$1,000). If an uninsured driver hits your $15,000 bike and totals it, UMPD at $250 deductible = you pay $250. Collision at $1,000 deductible = you pay $1,000. That’s a $750 difference from a coverage that costs $20-$40 a YEAR. Why would you pay 4x more out of pocket for the same accident? The only exception: if your collision deductible is already $250 or lower AND you live in a state where UMPD is an expensive add-on (rare). Otherwise, always max out UMPD to at least your bike’s total value.

Sources & References

Insurance Research Council (IRC) - Uninsured Motorist Population Study, 2025 Edition (15.4% of drivers uninsured, 2023 data)
NHTSA - 2024 Motorcyclist Crash Outcome Data Evaluation System (CODES): Fatal Injury Risk Per VMT & Claim Severity
Progressive Motorcycle - Internal UM/UIM Claim Frequency & Payout Report, 2023-2025
American Association for Justice (AAJ) - Underinsured Motorist Coverage Shortfall: Motorcycle Cases (2024 White Paper)
NAIC - Model Uninsured/Underinsured Motorist Act & State-by-State Mandate Status (2025)
Insurance Information Institute (III) - UM vs UIM: Consumer-Facing Fact Sheet (2025)
California Department of Insurance - 2025 Mandatory Insurance Offerings: Motorcycle UM/UIM Disclosure Requirements

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