Almost every for-hire trucking company that crosses a state line has an MCS-90. Most owners can tell you where it is filed. Few can tell you what it says. The short version: the MCS-90 is not insurance for you. It is a guarantee your insurer makes to the public on your behalf, and it contains a sentence that lets the insurer come back to you for the money.
The MCS-90 is a federal endorsement. Its full name is the Endorsement for Motor Carrier Policies of Insurance for Public Liability under Sections 29 and 30 of the Motor Carrier Act of 1980. It is a short form attached to your commercial auto liability policy.
Federal rules say no motor carrier may operate until it has the minimum level of financial responsibility in effect (49 CFR 387.7). For a for-hire carrier hauling non-hazardous freight across state lines in trucks with a gross vehicle weight rating of 10,001 pounds or more, that minimum is $750,000. Oil and certain hazardous materials require $1,000,000. The most dangerous hazmat classes require $5,000,000 (49 CFR 387.9).
The MCS-90 is how you prove it. The regulation accepts three kinds of proof: the MCS-90 endorsement, an MCS-82 surety bond, or written authorization from FMCSA to self-insure. Nearly every small fleet uses the first. You are required to keep that proof at your principal place of business.
Read the form and you will notice who it protects. It is not you. Under the endorsement, your insurer agrees to pay any final judgment recovered against you for public liability resulting from negligence in the operation, maintenance or use of your trucks, within the limits of liability described in the endorsement. Two phrases make it unusual:
A normal insurance policy is a contract with conditions. List your vehicles. Report your drivers. Stay within your stated radius. Break a condition and the insurer can deny the claim. The idea behind the 1980 law is that the person hit by a truck should not be the one who pays for a trucking company's paperwork mistake. The MCS-90 closes that gap for the public.
It does not close it for you. The form itself says it does not apply to injuries to your own employees on the job, or to the cargo you are hauling. It is not coverage for damage to your truck. And courts have generally held that it does not, by itself, require the insurer to defend you in a lawsuit (the case usually cited is Harco National v. Bobac Trucking, Ninth Circuit, 1997). It is a backstop for the public.
The same form says that you, the insured, agree to reimburse the company for any payment it makes on a claim involving a breach of the policy's terms, and for any payment it would not have been obligated to make under the policy except for the endorsement.
That is the mechanism. If a claim is covered by your policy, the MCS-90 changes nothing. Your policy pays, and that is the end of it. If a claim is not covered by your policy, the insurer still pays the injured person, because the MCS-90 says it must. Then it has the right to seek that money from you. IRMI, a standard insurance reference, puts it this way: the endorsement "does not actually provide insurance except on a reimbursement basis."
A plain illustration (hypothetical, not a client story): a three-truck carrier buys a fourth tractor on a Friday and dispatches it Monday morning. Nobody calls the agent. The policy covers scheduled vehicles only. Monday afternoon the new truck is in a crash and the carrier is found at fault. The injured driver is paid. Months later the carrier receives a demand letter from its own insurance company.
The carrier had an MCS-90 the whole time. It did exactly what it was designed to do.
The federal minimum for general freight has not changed since it went into effect in 1985. In its 2026 report to Congress on financial responsibility, FMCSA calculated what that figure would be today:
FMCSA did not propose raising the minimum. It said it would first need more detailed claims data from the insurance industry.
But the practical floor moved anyway. On May 14, 2026, a unanimous U.S. Supreme Court held in Montgomery v. Caribe Transport II that federal law does not block state-law claims that a freight broker negligently selected an unsafe carrier. Within weeks, C.H. Robinson published new carrier requirements: a minimum of $1 million in auto liability coverage, no carriers with a Conditional or Unsatisfactory safety rating, and operating authority that has been active for at least seven days. Other brokers set their own requirements.
For a small fleet, the number that decides whether you get the load is now often written in the broker's carrier agreement, not in the Code of Federal Regulations.
The MCS-90 is a promise to the public, made in your name. Keep every claim inside your policy and you will never find out what the last paragraph costs.
¡Sí, hablamos español! Un corredor licenciado revisa contigo tu póliza, tus camiones, tus choferes y tus contratos. La misma persona, la misma línea directa: (888) 585-9910.
New Decade Insurance is an independent brokerage built by agents who have been writing insurance since 2005. Licensed in CA, TX, FL and AZ.
This article is general information, not legal or insurance advice. Coverage depends on the terms, conditions and exclusions of your policy and on the facts of each claim. The example above is hypothetical. Federal requirements are summarized from 49 CFR Part 387 as of September 2026; confirm current rules with FMCSA or your broker.
A licensed broker reads your policy against your operation: trucks, drivers, radius and contracts. Five-minute call. Get a quote, or call (888) 585-9910.