UM and SUM Coverage: A NYC Rider's Real Backstop Against Uninsured Drivers

UM and SUM Coverage: A NYC Rider's Real Backstop Against Uninsured Drivers

August 20, 2026

Ask any rider who has spent time on the Cross Bronx or threaded through Manhattan traffic and they will tell you the same thing: this city is full of drivers who should not be on the road, and a fair number of them are not insured at all. When one of them clips you and vanishes, or turns out to carry the legal minimum and nothing more, the question stops being who was at fault and becomes who is actually going to pay. For a New York rider, the honest answer is usually your own coverage.

Quick answer: Uninsured motorist (UM) coverage is required on every New York auto policy, and supplementary underinsured motorist (SUM) coverage is the optional add-on that raises your protection. Together they are a rider's real backstop when the driver who hits you has no insurance, too little insurance, or flees the scene.
25/50/10
New York minimum liability many drivers carry
Required
UM coverage on every New York auto policy
SUM
Optional coverage that raises your real backstop

How Little the Minimum Really Is

New York requires drivers to carry liability coverage of 25/50/10, meaning 25,000 dollars for injury to one person, 50,000 dollars per crash, and 10,000 dollars for property damage. That is the floor, and a lot of drivers on the Deegan and the Hutch are sitting right on it. For a rider, 25,000 dollars can disappear in a single ambulance ride and one night in a trauma bay. When your injuries run past what a minimum policy holds, the at-fault driver's coverage is simply tapped out, and the difference does not go away just because it was not their fault to spare you. Remember that as a motorcyclist you do not have no-fault PIP to lean on either, which makes the gap between what you are owed and what the other driver can pay even more dangerous.

Why Uninsured Drivers Are So Common Here

The downstate metro concentrates every version of the problem UM coverage was built for. Some drivers let a policy lapse to save money. Some never bought one. Some are behind the wheel of a car that is not theirs, and some hit you and simply do not stop. On a crowded interchange or a dark stretch of parkway, a hit-and-run can be over before you have any idea who put you down.

  • ✓ Lapsed and never-bought policies. A meaningful share of drivers in the metro carry no valid coverage at all on any given day.
  • ✓ Hit-and-run drivers. When the car that hit you is gone, your UM coverage is often the only place to turn, since there is no other policy to pursue.
  • ✓ Minimum-limit drivers. Even an insured driver who carries only 25/50/10 can leave a serious injury badly underfunded.
  • ✓ Out-of-state and borrowed cars. A tangle of coverage questions can leave a rider chasing a policy that turns out not to exist.

What UM and SUM Actually Cover

Uninsured motorist coverage sits on your own New York auto policy and pays when the at-fault driver has no insurance or cannot be identified, such as in a hit-and-run. Supplementary underinsured motorist coverage, known as SUM, is the piece that matters when the other driver has some insurance but not enough. If your SUM limit is higher than the at-fault driver's liability limit, SUM can fill the gap between what they carried and what your claim is actually worth. New York requires UM coverage on every policy, so you almost certainly have some. The catch is that many riders carry it only at the minimum and never add meaningful SUM, which is exactly the coverage that would save them in a serious crash.

  • ✓ UM pays for uninsured and hit-and-run drivers. No identified policy on the other side does not have to mean no recovery.
  • ✓ SUM fills the gap under an underinsured driver. It steps in when the at-fault policy is real but far too small for your injuries.
  • ✓ Your limits are a choice. Carrying higher UM and SUM limits is one of the few things a rider fully controls before a crash ever happens.
  • ✓ Your own insurer still fights. A UM or SUM claim is filed against your own company, and it will question your injuries and your fault just like any other insurer.

Check Your Policy Before You Need It

The best time to find out what you carry is a quiet afternoon, not the week after a crash. Pull your declarations page and look at two things: your UM limit and your SUM limit. If they are sitting at the state minimum, you are counting on 25,000 dollars to cover a serious motorcycle injury in one of the most expensive medical markets in the country. Raising those limits is usually far cheaper than riders expect, and it is the single most effective step you can take to protect yourself against the uninsured drivers that fill these roads. Because New York gives you no PIP as a rider, this coverage is not a luxury add-on. It is the core of your protection.

The Bottom Line for NYC Riders

You cannot control who else is on the FDR tonight or whether they bothered to insure their car. You can control the coverage that rides with you. In a metro this full of uninsured, underinsured, and hit-and-run drivers, strong UM and SUM coverage is not a technicality on your policy. It is the backstop that decides whether a serious crash becomes a covered claim or a financial hole you never dug. Check your limits, raise them if they are thin, and know that if a phantom driver or a minimum-limit driver puts you down, you still have a real path to recovery.

Hit by an uninsured or underinsured driver on your bike?
Get a free case review at no cost with O'Connor Law PLLC, proud backers of New York riders through the BikersWin $20,000 giveaway drawn December 10, and let us put your own coverage to work the way it was meant to.

This article is general information about New York law and is not legal advice. Speak with a licensed New York attorney about the specifics of your case.

Mary Ellen O'Connor
About the Firm
Mary Ellen O'Connor
Motorcycle Injury Attorney · O'Connor Law

Mary Ellen O'Connor and the motorcycle accident lawyers in New York at O'Connor Law represent riders hurt by negligent drivers. If you have questions after a crash, their team is here to help.

Mary Ellen O'Connor

Mary Ellen O'Connor

Mary Ellen O'Connor is a New York motorcycle accident attorney at O'Connor Law PLLC. She helps riders across the Hudson Valley and downstate New York protect their rights and recover after a crash.

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