Glossary
MCS-90
MCS-90 is a federal endorsement concept tied to motor carrier public liability financial responsibility, not ordinary cargo or truck physical damage coverage.
Plain-English summary
The term should be verified through FMCSA and eCFR sources. Carriers should not treat MCS-90 as a simple coverage upgrade or as a substitute for understanding the underlying policy.
Where it shows up
MCS-90 may appear in public liability discussions, FMCSA filing questions, policy endorsement schedules, and broker or shipper compliance requests.
What it is not
- Cargo insurance
- Physical damage coverage
- A certificate of insurance
- A promise that every claim is covered by the policy
Who should verify this officially
- Owner-operators reading a quote
- New authorities preparing documents
- Small fleets reviewing certificates or claims
Why it matters for authority or safety
- Where the term appears
- How to discuss it with an agent
- Why the definition can affect coverage
Where regulatory shorthand misleads
What this term does not confirm
- A standalone guarantee of coverage
- A substitute for policy wording
- Legal advice about a contract
Verification mistakes
- Treating informal shorthand as policy language
- Assuming the same word means the same thing in every policy
Records to check
- Policy declarations
- Certificates
- Endorsements
- Contracts or official filing notices when relevant
Questions for official or policy review
- Where is this term defined in the policy?
- Does an endorsement change the meaning?
- Does a regulator or contract use the term differently?
Sources
- Insurance Filing Requirements Official Federal Motor Carrier Safety Administration — checked 2026-05-19
- 49 CFR Part 387 - Minimum Levels of Financial Responsibility for Motor Carriers Official Electronic Code of Federal Regulations — checked 2026-05-19
Questions carriers ask
Where should MCS-90 be verified?
Use official FMCSA and eCFR sources first, then confirm how the endorsement appears on the actual policy.
Found an error or outdated source? Submit a correction.