MCS-90 Endorsement Explained: What It Covers and Why You Repay, 2026

The MCS-90 is not coverage for you. It is a federal guarantee to the public, bolted onto your policy under 49 CFR 387.15. It makes your insurer pay a final judgment won by an injured third party, at least $750,000 on general freight, even when the policy would not have paid. Then comes the line that surprises new owner-operators: you agree to reimburse the insurer.

What is the MCS-90 endorsement, and what does it cover?

FMCSA notes it is not issued for individual vehicles. The insurer agrees to pay any final judgment against the insured for public liability from negligence in the operation, maintenance or use of motor vehicles, regardless of whether or not each motor vehicle is specifically described in the policy. Public liability means bodily injury, property damage and environmental restoration.

No condition, provision, stipulation or limitation in the policy, or violation of one, relieves the company from paying, even in the insured's bankruptcy. If it does not pay, the judgment creditor may sue it directly.

Situation	Does the MCS-90 respond?
Third party injured by your negligence	Yes, after a judgment
Truck missing from the schedule	Yes, description is irrelevant
Your own driver hurt at work	No, employees at work are excluded
Freight you hauled	No, cargo is excluded
Your own tractor, wrecked	No, that is physical damage

The last rows are the misunderstanding. Cargo needs its own policy, checked on the certificate of insurance. Your tractor sits under the covered autos symbols, and the difference between symbol 1 and symbol 2 decides whether an undescribed unit is on the policy at all: see symbol 1 versus symbol 2. Your primary liability policy defends you; the MCS-90 protects everyone else from you.

Why "I have an MCS-90, so I am covered for $750,000" is backwards

This is the most expensive sentence in the trade, and almost every owner-operator says it once. The endorsement is written for the person you hit, not for you. Everything a policy gives an insured, the defense, the deductible arithmetic, the right to be made whole, lives in the policy. The MCS-90 sits on top of that policy and does one job: it strips the insurer's defenses as against a member of the public, then hands you the bill.

What owners say	What the form and the rules say
"It is $750,000 of coverage for my company"	It is a minimum level of financial responsibility owed to the public under 49 CFR 387.9, and the insured agrees to pay the insurer back
"It replaces a real liability policy"	Section 387.15 calls it an endorsement to a policy, and 387.7(d) lists it as proof of financial responsibility, not as coverage
"It defends me in court"	The promise is to pay a final judgment. A defense comes from the underlying policy, and only if that policy responds
"It covers any truck I put on the road"	For the victim, yes: description is irrelevant. For you, an undescribed unit is precisely what triggers the reimbursement clause
"Every carrier has one, so every crash is covered"	Subpart A reaches for-hire property carriers in interstate or foreign commerce, plus hazmat carriers including intrastate, under 49 CFR 387.3

Read the two halves of the form in the order they were printed and the shape is obvious: the first half is a promise to strangers, the second half is a loan agreement with you.

What is the MCS-90 reimbursement clause?

One sentence carries the risk: the insured agrees to reimburse the company for any payment made by the company on account of any accident, claim, or suit involving a breach of the terms of the policy, and for any payment it would not have owed but for the endorsement.

Typical scenario, an illustrative composite. Foma runs two tractors and lets his brother-in-law take a Friday load. The driver is not on the policy, which requires scheduled drivers. Serious accident, judgment. The insurer cannot use the driver exclusion against the victim, so it pays, then bills Foma for the whole amount. It worked exactly as written.

What actually pulls the reimbursement trigger?

Not bad luck: a breach. The same short list keeps appearing on the invoices insurers send after they have paid a stranger. A driver who was never scheduled. A radius the policy never contemplated. A unit bought in March and reported in July. A commodity the policy excludes by name. A lapse nobody closed. None of that helps the insurer against the victim. Every item helps it against you, and what it can seek is not your deductible: it is the amount it paid, plus, on the face of the form, any defense costs it incurred.

Does the MCS-90 answer for a trip that never leaves the state?

The honest answer is that it depends on the court, and an owner should know that before leaning on the form. Two layers sit under the question. The rule first: 49 CFR 387.3 applies subpart A to for-hire carriers moving property in interstate or foreign commerce, and separately to carriers of hazardous materials, substances and wastes in interstate, foreign or intrastate commerce. Non-hazardous freight that never crosses a line is outside the subpart on its face. Subpart A also drops out below 10,001 pounds GVWR, except for the small list of hazard classes named in 387.3(b)(1).

Then the courts. The Tenth Circuit, sitting en banc in 2009 in Carolina Casualty Insurance Co. v. Yeates, held that the endorsement applies only where the underlying policy does not cover the accident and the carrier's coverage is either insufficient to meet the federal minimum or non-existent. On the intrastate question courts have split. On February 25, 2022 the Supreme Court of Indiana held in Progressive Southeastern Insurance Co. v. Brown that the endorsement does not reach purely intrastate trips of non-hazardous property, and reversed a state appellate decision that had gone the other way.

Test a court may apply	What it asks	What it means for one truck
Trip-specific	Was this movement interstate at the moment of the loss?	A local backhaul can fall outside the endorsement
Fixed intent of the shipper	Was the freight always destined to cross a state line?	A leg inside one state can still count as interstate
Public policy	Does applying it serve the purpose behind the statute?	Rejected by the Indiana court in 2022

Two lessons for an owner rather than for a lawyer. The MCS-90 is not a substitute for scheduling the truck properly: the argument you would have to win in court is one you never wanted to have. And if you run inside one state at all, that state runs its own filing regime, on its own forms, which federal paper does not satisfy: see which states require a Form E filing.

What is the difference between the MCS-90, BMC-91 and BMC-91X?

Different objects, different places. Under 49 CFR 387.7(d) your proof stays at your principal place of business; BMC forms are certificates the insurer sends to FMCSA under 387.313T(a)(3). Watch the numbering: the parallel § 387.313 is suspended indefinitely, so 387.313T is the text that actually operates.

Form	What it is	Rule
MCS-90	Endorsement held by the carrier; FMCSA receives the insurer's certificate instead	387.15
MCS-82	The same guarantee as a surety bond	387.15
BMC-91	Certificate for the full limit, filed with FMCSA	387.313T(a)(3)
BMC-91X	Certificate for full coverage or any level of aggregation	387.313T(a)(3)

So the BMC-91 certifies the full limit from one insurer, while the BMC-91X may represent a layer, which is how $1,000,000 is built from a primary and an excess writer. Two caveats on the word "unfiled": under 387.7(e)(2) non-North America-domiciled carriers must also file evidence of financial responsibility with FMCSA under subpart C, and the form itself promises FMCSA a duplicate of the policy with all its endorsements whenever the agency asks. Mechanics: our BMC-91 guide and the FMCSA lookup.

What limit does the MCS-90 carry?

The blank on page one is filled by the insurer; the floor is 49 CFR 387.9. Mind the footnote on the form: the schedule printed there provides no coverage and is informational only. It also runs a step behind the rule. Entry (2) on the current form still narrows hazardous substances to cargo tanks, portable tanks and hopper-type vehicles with capacities in excess of 3,500 water gallons, a qualifier the current 387.9 no longer carries.

Entry and operation	Commodity	Minimum
(1) For-hire, GVWR 10,001 lb or more	Property, nonhazardous	$750,000
(2) For-hire and private, GVWR 10,001 lb or more	Hazardous substances per 171.8 in bulk in cargo tanks, portable tanks or hopper-type vehicles; bulk Division 1.1, 1.2, 1.3; bulk Division 2.3 Zone A; bulk Division 6.1 Packing Group I Zone A; bulk Division 2.1 or 2.2; highway route controlled quantities of Class 7	$5,000,000
(3) For-hire and private, GVWR 10,001 lb or more	Oil in 172.101; hazardous waste, hazmat and hazardous substances defined in 171.8 and listed in 172.101, but not mentioned in entry (2) or (4)	$1,000,000
(4) For-hire and private, GVWR less than 10,001 lb	Bulk Division 1.1, 1.2, 1.3; bulk Division 2.3 Zone A; bulk Division 6.1 Packing Group I Zone A; highway route controlled quantities of Class 7	$5,000,000

Read the GVWR column before the dollars. Bulk hazmat reaches $5,000,000 in both weight bands, and the $1,000,000 line exists only for what entries (2) and (4) do not already name.

Where the $300,000 line actually lives

Table 1 has four entries and not one of them says $300,000, which quietly confuses every owner running a light unit. The figure for for-hire non-hazardous property below 10,001 pounds GVWR sits in 49 CFR 387.303T(b)(1)(i), the operative twin of the suspended 387.303, and it is the first row of FMCSA's own Insurance Filing Requirements chart. The same chart settles a second argument in one column: at the federal level general freight carries a cargo requirement of $0, and only household goods movers add a BMC-34 or BMC-83 at $5,000. Brokers who demand a cargo filing are asking for something FMCSA never required, though your contract may.

How is the MCS-90 cancelled?

1. 35 days between the parties. Under 387.7(b)(1) either side cancels on 35 days written notice, from the date it is transmitted.
2. 30 days to FMCSA. The form adds 30 days notice to the agency, but only if the insured is subject to FMCSA registration under 49 U.S.C. 13901. Under 387.313T(d) those 30 days run from the date the notice is actually received by FMCSA, not from the date you sent it.
3. Replacement is faster. Under 387.7(c) the old insurer's liability ends on the replacement's effective date, if sooner.

Under 49 U.S.C. 13906 a registration lasts only as long as its security, so missing that window costs the authority itself: see lapse and MC revocation and, for the three clocks that run after a cancellation notice, how reinstatement and no-loss letters work.

The exceptions almost nobody uses

Section 387.7(b)(2) allows a policy or bond written for a finite period specifically to cover a lapse in continuous compliance. That is the lawful way to plug a hole, as opposed to backdating one. Section 387.7(b)(3) carves out Mexico-domiciled carriers running only in United States border municipalities and their commercial zones under a part 368 Certificate of Registration: they may buy coverage for periods of 24 hours or longer, must keep the Certificate, the MCS-90 and an insurance identification card in each vehicle, and are exempt from the cancellation notice printed on the form. Two more lines apply to anyone domiciled in a contiguous foreign country: 387.7(f) requires a legible English copy of the MCS-90 or MCS-82 on board, and 387.7(g) says a vehicle without it is denied entry into the United States.

What should you ask before your MCS-90 is issued?

Typical scenario, an illustrative composite. Anisim buys his first tractor and sits with an agent on Brighton Beach who explains it in Russian, a relief after four English-only quotes. He hears seven hundred fifty thousand and reads it as the sum he is protected for. It is the floor of what a stranger can collect.

1. Does the entity name match my FMCSA record? Section 387.15 requires the exact name.
2. Primary or excess on page one? Excess means another layer answers first, and its underlying limit is on the same line.
3. Which exclusions trigger reimbursement? Ask in writing: drivers, radius, cargo.
4. Who files the BMC-91 or BMC-91X, and when? Take the date, then verify it.
5. Where is my copy? Under 387.7(d), at your principal place of business.

TruckSafe is not a licensed insurance agency. We are an independent platform connecting carriers with licensed professionals, and the above is regulatory analysis, not legal or coverage advice. Read the reimbursement paragraph on your own MCS-90 before renewal, then put those questions to your agent in writing. If you need a policy with the MCS-90 attached and the BMC-91X actually filed, request a truck insurance quote and name the filings you need on the form. Questions in Russian, English or Ukrainian: (315) 871-0833.