New York drivers are required to carry uninsured motorist (UM) coverage, and policyholders also have the option to purchase Supplementary Uninsured/Underinsured Motorist (SUM) coverage through an endorsement on their auto or motorcycle policy.
While UM coverage protects you when an at-fault driver has no insurance, SUM coverage provides critical additional protection when the driver’s liability limits are too low to fully compensate you after a motorcycle accident.
SUM is designed to fill the gap between the at-fault driver’s insurance and the true value of your medical bills and other damages, which can be very high in motorcycle accidents. It operates as an “offset” benefit, meaning the most you can recover under your SUM policy is your coverage limit minus any amount already received from the negligent party.
In other words, SUM pays what remains unpaid—up to your policy limit.
This protection is especially important for motorcyclists. New York’s minimum bodily injury liability requirement is just $25,000 per person, an amount that is often nowhere near enough to cover the serious injuries commonly sustained in motorcycle crashes. SUM coverage can make the difference between a partial recovery and full financial protection.
A motorcycle crash lawyer can help you understand how to trigger SUM coverage, navigate offset rules, obtain required consent before settling, and avoid mistakes that forfeit claims, protecting your ability to recover full compensation when the responsible driver carries inadequate insurance.
Key Takeaways for Supplementary Uninsured Motorist Coverage Motorcycle NY
- New York's minimum liability limits of $25,000 per person rarely cover the full damages motorcyclists suffer in serious crashes, creating significant coverage gaps that leave injured riders undercompensated
- SUM coverage can fill uncompensated damages, but it’s an offset benefit: the maximum SUM payable is generally your SUM limit minus payments received from negligent parties, and it pays only what’s needed to cover remaining damages
- SUM coverage uses an offset rule—your SUM carrier reduces what they pay by the amount you recovered from the at-fault driver, rather than "stacking" full additional coverage on top
- You must obtain your SUM carrier's consent before settling with the at-fault driver's insurance company, or you risk forfeiting your SUM claim entirely under New York's consent-to-settle requirements.
- Triggering SUM coverage requires exhausting or establishing the inadequacy of the at-fault driver's liability limits through settlement, judgment, or proof the driver was uninsured.
How Does SUM Coverage Work in New York?
New York Insurance Regulation 35-D (11 NYCRR Part 60-2) governs Supplementary Uninsured/Underinsured Motorist coverage. Insurance Law § 3420(f)(2-a) requires insurers to make SUM available at the insured’s option, and for certain new policies, the default is SUM limits equal to bodily injury limits unless the first named insured signs a waiver for lower limits or rejection.
SUM coverage provides compensation when:
- The at-fault driver is uninsured — They have no liability insurance coverage at the time of the accident
- The at-fault driver is underinsured — Their liability limits are insufficient to compensate you for your damages
- Hit-and-run crashes — Coverage is generally barred unless the injury arose from physical contact with the unidentified vehicle, plus policy notice and reporting conditions
SUM coverage operates through an endorsement attached to your insurance policy. This endorsement specifies your coverage limits (typically matching your liability limits unless you selected different amounts) and the procedures for making claims.
The SUM Offset Rule in New York
New York SUM coverage uses an offset structure rather than true supplemental "stacking." Your SUM policy limit represents the maximum total recovery available from both the at-fault driver's insurance and your SUM coverage combined, not additional coverage layered on top.
The offset calculation works as follows:
Max SUM payment = your SUM limit − what you recovered from the at-fault driver
Hypothetical example:
A motorcyclist has $100,000 SUM coverage, $80,000 in damages, and $25,000 from the at-fault driver. The maximum SUM payment they may receive would be $75,000.
But since their damages total $80,000 and they received $25,000 from the liable party, their SUM carrier would only pay $55,000, bringing the total recovery to the actual damages.
If, instead, their damages were $120,000, they may receive the full $75,000 maximum SUM payment (after offset), bringing the total recovery to $100,000 ($25,000 + $75,000).
This offset structure means SUM coverage fills the gap between inadequate liability limits and your damages, up to your SUM policy limit, rather than providing completely separate additional coverage.
When Can I Trigger My SUM Coverage?
Triggering SUM coverage in New York requires establishing that the at-fault driver's liability insurance is insufficient to compensate for your damages. This usually happens one of three ways:
Exhausting the At-Fault Driver's Policy Limits
The most common method is settling with the at-fault driver's insurance company for their full policy limits. Once you accept the liability carrier's policy limits settlement, you've exhausted their coverage, which triggers your SUM claim for the remaining damages.
Obtaining a Judgment Against the At-Fault Driver
If you take the case to trial and obtain a judgment that exceeds the at-fault driver's policy limits, this establishes the inadequacy of their coverage and triggers your SUM claim for the excess amount (up to your SUM limits after offset).
Proving the Driver Was Uninsured
When the at-fault driver has no insurance, you file directly with your SUM carrier after establishing through police reports and investigation that the responsible party was uninsured.
Do I Need My Insurer's Consent Before Settling With the At-Fault Driver?
Yes. New York's consent-to-settle requirement is critical. Before accepting any settlement from the at-fault driver's insurance company, you must notify your SUM carrier and obtain its written consent to settle.
This requirement exists because your SUM carrier has the right to:
- Investigate the claim — Review medical records, accident evidence, and liability to assess whether the at-fault driver is actually underinsured relative to your damages
- Participate in settlement negotiations — Ensure the at-fault driver's full policy limits are obtained rather than accepting a discounted settlement that leaves more exposure for your SUM carrier
- Preserve subrogation rights — Protect their ability to recover amounts they pay from other potentially liable parties
If you settle with the at-fault driver without obtaining consent, your SUM carrier can argue you breached the policy terms and deny your SUM claim. Courts take this requirement seriously, and failure to obtain consent can forfeit otherwise valid SUM claims.
The practical process involves:
- Notifying your SUM carrier in writing when you've been injured by an uninsured or underinsured driver
- Providing documentation of your damages, the at-fault driver's policy limits, and settlement offers
- Requesting written consent before accepting any settlement from the liable party
- Obtaining explicit written consent before signing releases or accepting payment
Most consent-to-settle provisions require 30 days' notice before settling, giving your SUM carrier time to evaluate the claim and respond. Your motorcycle accident attorney can handle communications with both the at-fault driver’s insurance and your SUM carrier to make sure these requirements are met. This is a complicated area of law and an experienced attorney can examine the unique circumstances to ensure full compliance with the law.
How Do I Build a Strong SUM Claim After a Motorcycle Accident?
Successfully recovering on your SUM claim requires careful documentation and strategic claim presentation. Your SUM carrier needs proof that your damages exceed what the at-fault driver's insurance paid.
Document Every Category of Loss
Your SUM claim must establish that your total damages significantly exceed the at-fault driver's policy limits:
Medical expenses — Emergency care bills, surgery costs, rehabilitation charges, prescription receipts, and projected future treatment costs with supporting documentation from your physicians
Lost income — Pay stubs showing missed work, tax returns establishing your earning history, and employer letters confirming time off. If injuries cause permanent limitations, include vocational expert analysis of reduced earning capacity
Pain and suffering — How injuries affected your daily activities, relationships, hobbies, and quality of life. Permanent disabilities, scarring, or ongoing limitations strengthen these claims
Property damage — Repair estimates or total loss valuations for your motorcycle, plus damaged riding gear and personal property
Contact Your SUM Carrier Immediately
Don't wait until after settling with the at-fault driver to notify your SUM carrier. Early notification allows them to investigate the crash, review medical records, assess your damages, and participate in settlement negotiations. Many policies require prompt notice of potential SUM claims.
Get Written Consent Before Accepting Any Settlement
Never accept payment from the at-fault driver's insurance company without written consent from your SUM carrier. New York's consent-to-settle requirement protects your SUM carrier's subrogation rights. Settling without consent can forfeit your entire SUM claim, leaving you with only the inadequate at-fault driver's payment.
Preparing for SUM Arbitration
Many SUM coverage disputes proceed to binding arbitration rather than court litigation when your insurance carrier disputes the value of your claim or whether coverage applies. Arbitration hearings require the same level of preparation as trials, though an arbitration hearing is less formal.
A motorcycle accident attorney experienced in SUM arbitration can present your case effectively to the arbitrator, cross-examine your insurance company's experts, and counter arguments that your damages don't exceed the at-fault driver's payment or that you failed to comply with policy requirements. Insurance companies bring lawyers to arbitration. You should too.
How William Mattar, P.C. Handles SUM Claims for Injured Motorcyclists
Insurance companies often downplay SUM coverage or make the process confusing, hoping injured motorcyclists will settle cheaply or forfeit claims through procedural mistakes. We guide clients through the entire SUM process:
- Identify available SUM coverage — Review motorcycle policies, household auto policies, and other potential sources to find available coverage
- Obtain proper consent to settle — Coordinate with SUM carriers to get written consent before accepting at-fault driver's policy limits, protecting your SUM rights
- Calculate offset properly — Ensure SUM carriers apply offset rules correctly and don't underpay based on improper calculations
- Navigate priority disputes — Resolve conflicts when multiple policies potentially provide coverage, establishing proper priority to access all available limits
- Present comprehensive SUM claims — Document full damages with medical evidence, economic analysis, and expert testimony that establishes why your injuries exceed available liability coverage
- Pursue SUM arbitration when necessary — Represent clients in binding arbitration proceedings when SUM carriers dispute coverage or damages
Our attorneys work with motorcyclists throughout New York State who've been injured by uninsured or underinsured drivers. With offices across the state, we can provide local representation backed by experience handling complex SUM coverage disputes.
FAQ for New York Motorcycle SUM Coverage
What are New York's minimum liability limits, and why aren't they enough?
New York requires minimum liability limits of $25,000 per person for bodily injury. Serious motorcycle crash injuries routinely exceed this amount through emergency care, surgery, rehabilitation, lost wages, and long-term treatment needs.
What if I don't have motorcycle insurance—can I use my car's SUM coverage?
Potentially. If you have an auto insurance policy covering a household vehicle, that policy's SUM coverage may extend to you as a household member injured in a motorcycle crash, subject to policy language and priority rules. An attorney should review your specific policies.
Does SUM coverage pay for property damage to my motorcycle?
Some SUM endorsements include property damage coverage for uninsured motorists, but coverage for underinsured motorists typically addresses bodily injury only. Review your specific endorsement language to determine property damage coverage availability.
Does SUM coverage apply to hit-and-run motorcycle accidents in New York?
Potentially. In NY, an unidentified hit-and-run can be treated as an uninsured motorist claim under your coverage only if policy and statutory conditions are met. Most importantly, the physical contact requirement, as well as strict notice and reporting requirements.
What happens if my damages are less than the at-fault driver's policy limit?
If the at-fault driver's liability limits exceed your damages, you won't need SUM coverage because the liable party's insurance fully compensates you. SUM only applies when damages exceed available liability coverage.
Can my SUM carrier refuse to pay even after I exhaust the at-fault driver's limits?
SUM carriers sometimes dispute coverage based on policy exclusions, causation arguments, or damage valuations. When disputes arise, SUM arbitration or litigation may be necessary to recover the compensation you're entitled to under your policy.
Protect Your SUM Rights With Early Legal Guidance
Mistakes in handling underinsured motorist claims cost injured motorcyclists thousands or tens of thousands in lost compensation. Settling with the at-fault driver without SUM carrier consent, accepting inadequate settlements without understanding offset rules, or failing to identify available coverage sources could mean accepting less than what’s fair in your case.
Our motorcycle accident attorneys work with injured riders throughout New York State who face coverage shortfalls when at-fault drivers carry minimal insurance. We identify all available SUM coverage, obtain proper consent, navigate offset calculations, and pursue arbitration or litigation when carriers deny valid claims.
Hit by a driver with low insurance limits? Don’t leave money on the table. Contact William Mattar, P.C. today. Phones are answered around the clock. No Fee Until We Win.
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