If you operate a commercial motor vehicle in interstate commerce, you’ve probably heard of the MCS-90 endorsement. It’s one of those requirements that every trucker needs to have but few fully understand. What exactly is it? Why does it exist? And what does it actually cover β and not cover β when you need it most? This guide explains the MCS-90 endorsement in plain language so you understand exactly what you have, what it protects, and where its limits are.
What Is the MCS-90 Endorsement?
The MCS-90 endorsement is a federally mandated addition to a commercial trucking liability insurance policy. It’s not a separate insurance product β it’s an endorsement (a modification) attached to your existing primary liability policy that creates specific legal obligations for your insurer in connection with FMCSA requirements.
The full name of the form 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 was created by Congress through the Motor Carrier Act of 1980 to ensure that members of the public injured by commercial trucks would always have a financially viable source of compensation β regardless of whether the motor carrier’s insurance policy would otherwise cover the loss.
In practical terms: the MCS-90 is a backstop for the public. It prevents insurance companies from using policy exclusions or technicalities to avoid paying an injured person after a truck accident.
Who Is Required to Have the MCS-90?
The MCS-90 endorsement is required for all for-hire interstate motor carriers operating under FMCSA authority. Specifically:
- Any carrier with a for-hire Motor Carrier (MC) number issued by the FMCSA
- Any carrier transporting property or passengers for compensation across state lines
- Carriers operating vehicles with a gross vehicle weight rating (GVWR) over 10,000 pounds in interstate commerce
Who does NOT need the MCS-90:
- Private carriers (companies transporting their own goods, not for hire)
- Carriers operating exclusively intrastate (within one state only)
- Leased owner-operators who operate entirely under a motor carrier’s authority (the carrier holds the MCS-90, not the individual driver)
If you have your own MC authority, you need an MCS-90 on your policy. Period. Without it, your FMCSA operating authority won’t activate, and you can’t legally operate as a for-hire carrier in interstate commerce.
What Does the MCS-90 Cover?
The MCS-90 covers bodily injury and property damage caused to the public by the motor carrier’s vehicle while being used to transport property in interstate or foreign commerce. More specifically, it creates an obligation for the insurer to pay a final judgment against the motor carrier up to the applicable FMCSA minimum limits β even if the loss would otherwise be excluded by the base policy.
Common situations where the MCS-90 might be triggered:
- A policy condition was violated (e.g., the driver wasn’t listed, the vehicle wasn’t scheduled) but a member of the public was still injured
- The underlying policy was voided or rescinded for misrepresentation, but a third-party claim still exists
- The insurer would otherwise deny the claim due to a policy exclusion, but a court judgment has been entered against the motor carrier
The key point: the MCS-90 doesn’t guarantee that the motor carrier’s insurer will cover everything β it guarantees that the injured public will receive compensation up to the minimum FMCSA limits regardless of policy technicalities.
What the MCS-90 Does NOT Cover
This is equally important to understand. The MCS-90 is specifically a public protection mechanism β it is NOT a comprehensive coverage enhancement for the motor carrier. Here’s what it doesn’t do:
It Does Not Expand Your Coverage Limits
The MCS-90 only kicks in up to the FMCSA minimum limits ($750,000 for general freight, $1M or $5M for HAZMAT). If you’ve purchased $1,000,000 in primary liability, the MCS-90 operates within that limit. It doesn’t add coverage on top of your policy β it only ensures the insurer can’t wriggle out of paying up to those minimums.
It Does Not Protect the Motor Carrier Against Insurer Reimbursement
This is the most important thing to understand: if the insurer is forced to pay a claim under the MCS-90 that it wouldn’t have paid under the base policy, the insurer has a right of reimbursement (subrogation) against the motor carrier. In other words, if your insurer pays a victim because of MCS-90 but the loss wasn’t covered by your policy, the insurer can come after you personally for that money.
This means operating in violation of your policy conditions β unlisted drivers, excluded vehicles, misrepresented operations β is not a free pass just because you have an MCS-90. You may end up paying the claim yourself.
It Does Not Cover Cargo
The MCS-90 covers bodily injury and property damage to the public. It does not cover loss or damage to the cargo you’re hauling. Motor truck cargo insurance is a separate policy that covers the freight in your care, custody, and control.
It Does Not Cover Private Carriers
Private carriers β companies hauling their own goods, not for hire β are not subject to FMCSA financial responsibility requirements and do not need an MCS-90. They still need liability insurance (typically required by state law and sound business practice), but the federal endorsement requirement doesn’t apply.
It Does Not Cover Intrastate Operations
If you operate exclusively within one state, the MCS-90 is a federal endorsement that doesn’t technically apply β though your state may have its own equivalent requirement.
MCS-90 vs. Standard Primary Liability: Key Differences
| Feature | Standard Primary Liability | MCS-90 Endorsement |
|---|---|---|
| What it covers | BI/PD per policy terms and conditions | Guarantees payment to public up to FMCSA minimums regardless of policy defenses |
| Who benefits | Motor carrier (policy protects insured) | Injured third parties (the public) |
| Insurer’s right of reimbursement | Normal subrogation applies | Insurer may recover from motor carrier if MCS-90 pays excluded loss |
| Required by | Common sense / state law | FMCSA / federal law (for for-hire interstate carriers) |
| Activates when | Covered loss occurs per policy terms | Judgment entered against carrier; insurer can’t use policy defense to avoid payment |
How the MCS-90 Works in a Claim
Here’s a simplified example of how the MCS-90 operates in practice:
Scenario: A motor carrier has a policy that lists specific drivers. An unlisted driver β perhaps a temporary fill-in β causes an accident injuring another motorist. The insurer tries to deny the claim because the driver wasn’t listed on the policy.
Without the MCS-90: The insurer might successfully deny the claim. The injured person would need to sue the motor carrier directly, and if the carrier has no assets, they could be left with nothing.
With the MCS-90: The insurer cannot use the “unlisted driver” exclusion to deny payment to the injured public. If a court enters a judgment against the motor carrier, the insurer must pay up to the FMCSA minimum limits. However β the insurer then has the right to come after the motor carrier for reimbursement of that payment.
The MCS-90 protects the public. It does not protect the motor carrier from the consequences of operating outside the terms of their policy.
What Insurance Carriers Provide the MCS-90?
The MCS-90 must be provided by an insurance carrier that is: (1) authorized to write commercial trucking liability in the states where you operate, and (2) capable of filing electronically with the FMCSA. Not all insurance carriers are authorized to write commercial trucking or to file FMCSA forms.
When you purchase a primary liability policy from a qualified trucking insurer, the MCS-90 endorsement is automatically attached and filed with the FMCSA as part of the policy issuance process. You should receive a copy of the endorsement in your policy documents. Your broker should confirm that the FMCSA filing has been completed and that your USDOT profile in SAFER shows the policy as active.
Major insurance carriers that write commercial trucking and provide MCS-90 endorsements include Progressive Commercial, Travelers, Berkshire Hathaway GUARD, Canal Insurance, Old Republic, and numerous specialty and surplus lines markets. The right carrier for your account depends on your operation type, history, and risk profile.
How to Get Your MCS-90 Through Full Coverage LLC
At Full Coverage LLC, every primary liability policy we write for interstate motor carriers includes the required MCS-90 endorsement and FMCSA filing as a standard part of our service. We don’t treat it as an add-on β it’s part of every truck insurance package we put together.
Here’s what our process looks like:
- You provide your information: CDL, MVR, equipment list, description of operations, USDOT/MC numbers.
- We shop your account: We present your submission to our network of 20+ trucking insurance carriers and identify the best fit for your operation and budget.
- We bind coverage: Once you select a policy, we bind the coverage β often same-day for standard risks.
- We handle FMCSA filings: We file the BMC-91 certificate of insurance and ensure the MCS-90 endorsement is properly attached and filed.
- We confirm your authority status: We verify that your USDOT profile in SAFER reflects the active filing before you start operations.
Our team is led by Nazar Mamaev, CDS, TRS, TRIP β one of the few commercial insurance professionals in the country with all three of the leading trucking insurance and safety designations.
Frequently Asked Questions About the MCS-90
How do I know if my policy has an MCS-90?
Check your policy documents. The MCS-90 should appear as a named endorsement in your policy package. You can also verify that your insurer filed with the FMCSA by checking the SAFER system at safer.fmcsa.dot.gov β your USDOT profile should show an active insurance filing from your carrier.
Does the MCS-90 increase my insurance cost?
No. The MCS-90 is a standard endorsement included with any qualifying primary liability policy for interstate motor carriers. It does not cost extra β it’s part of the policy. If a broker tells you the MCS-90 is an add-on with additional cost, that’s incorrect.
Can I operate while my MCS-90 is being processed?
No. You should not haul freight for hire in interstate commerce until your FMCSA filing is confirmed active. The filing typically takes 3β7 business days to appear in SAFER after your policy is bound. Operating without active FMCSA filings can result in authority suspension and personal liability if an accident occurs during that window.
What happens to my MCS-90 if my policy cancels?
When your policy cancels, your insurer files a BMC-35 cancellation notice with the FMCSA. This triggers automatic suspension of your operating authority if a replacement filing isn’t received. The MCS-90 endorsement becomes inactive on the date the policy cancels. Always renew before your policy expiration date, and confirm the new filing is in place before the old one lapses.
Do I need the MCS-90 if I’m leased onto a carrier?
If you’re operating under the carrier’s MC authority, the carrier holds the MCS-90 for their policy β not you individually. You don’t need your own MCS-90. However, if you also operate under your own MC authority on separate loads, you need your own qualifying policy with the MCS-90 endorsement.
Is the MCS-90 the same as the MCS-90B?
The MCS-90B is specifically for passenger carriers. The standard MCS-90 is for property carriers. Both serve the same public protection function but apply to different types of motor carrier operations.
Get Your MCS-90 Filed Today
Don’t let your operating authority sit inactive waiting for an insurance filing. Full Coverage LLC handles the complete insurance and FMCSA filing process for motor carriers across the United States β often with same-day binding for qualified applicants.
Get a quote and get your MCS-90 filed today β
Written by Nazar Mamaev, CDS, TRS, TRIP β President & CEO, Full Coverage LLC. Connect on LinkedIn.
Coverage Available in These States
Full Coverage LLC offers MCS-90 Endorsement for trucking operations across the country. Here are some of our highest-traffic states: