What the MCS-90 does
The MCS-90 is an endorsement attached to your auto liability policy. It amends the policy so it meets federal financial responsibility rules under the Motor Carrier Act of 1980.
Here is the heart of it. The insurer agrees to pay final judgments against you for public liability, meaning bodily injury, property damage, and environmental restoration, caused by negligent operation, maintenance, or use of your motor vehicles. It pays up to the federal minimum for your operation even when your policy would not otherwise cover the claim.
That last part is why the endorsement exists. It is a guarantee to the public. If a policy exclusion or a breach would have let the insurer deny the claim, the MCS-90 still makes the insurer pay the injured party.
Who needs it
Federal financial responsibility rules in 49 CFR 387 Subpart A apply to these carriers:
| Operation | Federal minimum the MCS-90 backs |
|---|---|
| For-hire, nonhazardous property, 10,001 lbs GVWR or more | $750,000 |
| Oil and listed hazmat outside the top class, 10,001 lbs or more | $1,000,000 |
| Certain bulk hazmat, Division 1.1 to 1.3 explosives, bulk 2.1 or 2.2 gases, HRCQ Class 7 | $5,000,000 |
- For-hire carriers of property in interstate or foreign commerce, such as a Houston carrier hauling to Louisiana on I-10
- Carriers of hazardous materials, substances, or wastes in interstate or foreign commerce, private or for hire
- Intrastate carriers of bulk oil, bulk hazmat, substances, or wastes, including Texas-only tanker work in the Permian and Eagle Ford
- Intrastate carriers of a highway route controlled quantity of Class 7 radioactive material
What it covers and what it does not
The endorsement is broad on vehicles and routes, and narrow on who it protects.
- Covered: bodily injury, property damage, and environmental restoration owed to the public.
- Covered: any of your vehicles, whether or not the truck is listed on the policy.
- Covered: any route or territory where the crash happens.
- Not covered: injury or death of your own employees on the job. That is a workers' comp or occupational accident issue.
- Not covered: cargo you are hauling. That takes cargo insurance.
- Not covered: damage to your own truck. That takes physical damage coverage.
The reimbursement trap
This is the part most truckers miss. The MCS-90 says you must reimburse the insurer for any payment it makes because of the endorsement that it would not have owed under the policy alone.
The endorsement pays the public. Then the insurer comes to you for the money.
These situations can trigger it:
| Step | What happens |
|---|---|
| 1 | A crash injures someone and a judgment is entered against you. |
| 2 | Your policy would not cover it because of an exclusion or breach. |
| 3 | The MCS-90 makes the insurer pay the injured party up to the federal minimum. |
| 4 | The insurer demands repayment from you for that amount. |
- You add a new tractor in Fort Worth and forget to tell your agent. It crashes before it is listed. The public gets paid, and you may get the bill.
- A driver your insurer excluded by name takes a load anyway and causes a wreck on I-45.
- You haul a commodity your policy excludes, such as placarded hazmat on a general freight policy.
- You breach a policy condition, such as late notice of a claim, and the insurer would have denied coverage.
How the MCS-90 differs from your liability policy
They are attached to each other but do different jobs. The endorsement is not extra coverage for your business.
| Auto liability policy | MCS-90 endorsement | |
|---|---|---|
| Who it protects | You and the public | The public only |
| Limits | Whatever you buy, often $1,000,000 | Up to the federal minimum for your operation |
| Defense costs | Usually included | Not a promise to defend you |
| Exclusions | Apply as written | Do not stop payment to the public |
| Who pays in the end | The insurer, for covered claims | You, through reimbursement, for claims the policy would not cover |
Cancellation and proof
The MCS-90 stays active until canceled. Either you or the insurer can cancel with 35 days' written notice to the other. If you are subject to FMCSA registration, 30 days' notice must also go to FMCSA, counted from when FMCSA receives it.
You do not file the MCS-90 with anyone. Under 49 CFR 387.7, you keep proof of financial responsibility at your principal place of business and produce it on reasonable request.
The form also includes a schedule of limits, and the form itself says that schedule does not provide coverage. Your policy declarations set your actual limits.
Texas intrastate carriers that are not covered by the federal rule prove coverage to TxDMV with a Form E instead. A tanker running bulk crude in the Permian can need both.
Texas scenarios where the MCS-90 comes into play
The endorsement sits quietly on the policy until something goes wrong. In each case below, the injured party gets paid, and the carrier may get a repayment demand from its own insurer months later.
- A frac sand hauler in the Permian adds a second truck mid-term and dispatches it on US-285 before calling the agent.
- A Laredo carrier picks up a load at the World Trade Bridge that turns out to need placards the policy does not cover.
- A small fleet in Dallas lets a newly hired driver run I-30 before the insurer approves the driver.
- A tanker in the Eagle Ford spills product, and environmental restoration costs land on the carrier.
Questions to ask your agent
Bring these up when you quote or renew. The answers tell you where reimbursement exposure might hide. Get the answers in writing when you can.
- Is the MCS-90 attached, and does it show the right federal minimum for what I haul?
- Are all my trucks scheduled, or does the policy cover any auto?
- Which drivers are excluded, and how do I add a new hire?
- Which commodities are excluded from the policy?
- How fast do I need to report a new truck or an accident?
How to stay out of the trap
Most reimbursement claims come from gaps between what you run and what your policy lists.
- Report every new truck and trailer to your agent before it hauls a load.
- Report new drivers and get them approved before dispatch.
- Haul only the commodities your policy lists.
- Report every accident right away, even minor ones.
- Review your schedule of vehicles and drivers at every renewal.
Coverage this guide touches
Questions truckers ask
Is the MCS-90 insurance?
Not in the way most people think. It is an endorsement on your auto liability policy that guarantees payment to injured members of the public up to the federal minimum. It does not protect your business. If the insurer pays a claim only because of the MCS-90, you must reimburse it. Think of it as a public safety guarantee backed by your insurer.
Do Texas intrastate truckers need an MCS-90?
Most Texas-only general freight carriers prove coverage to TxDMV with a Form E instead. The federal rule does reach intrastate carriers of bulk oil, bulk hazmat, substances, or wastes, and highway route controlled quantities of Class 7 material. If you run a tanker in the Permian or haul bulk chemicals around Houston, ask your agent whether your policy needs the endorsement.
Does the MCS-90 cover my cargo or my own truck?
No. The endorsement covers public liability: bodily injury, property damage, and environmental restoration owed to others. It does not cover cargo you haul, injuries to your own employees, or damage to your own truck. You need cargo insurance, physical damage coverage, and workers' comp or occupational accident coverage for those risks.
How can I avoid reimbursing my insurer under the MCS-90?
Keep your policy matched to your real operation. List every truck before it runs, get every driver approved before dispatch, haul only the commodities your policy covers, and report accidents right away. Most reimbursement demands come from unlisted vehicles, excluded drivers, or excluded freight. A review of your schedules at each renewal catches most gaps.