Guide
BMC-91 and BMC-91X Explained
BMC-91 and BMC-91X are not certificates of insurance. They are official financial responsibility filings submitted by insurers to FMCSA to prove that a motor carrier has the required public liability coverage in place. A carrier cannot file these forms itself by uploading a COI to a broker.
Last reviewed: June 22, 2026
Plain-English summary
These forms are part of the FMCSA authority system. Active filings are visible in FMCSA's Licensing and Insurance public records. A cancelled or lapsed filing can trigger authority revocation, which is why filing timing and premium continuity both matter.
What each form does
- BMC-91: Used by a single insurer to certify minimum public liability financial responsibility for a motor carrier. The most common form for standard for-hire property carriers.
- BMC-91X: Used when multiple insurers or financial responsibility providers share coverage layers. Each insurer files a BMC-91X covering its layer.
- Both forms are filed electronically by the insurer or financial responsibility provider—not by the carrier emailing a document to FMCSA.
- When a policy is cancelled, the insurer submits an updated filing reflecting the cancellation effective date, which FMCSA records publicly.
Other FMCSA financial responsibility forms
FMCSA references multiple forms beyond BMC-91 and BMC-91X. BMC-34 covers cargo liability. BMC-84 is a freight broker surety bond form. The MCS-90 endorsement is attached to the policy and is a separate concept from the BMC filing itself. The specific forms required depend on the carrier's authority type, cargo, and operation—official FMCSA sources should be consulted for current requirements.
Verifying filing status through official channels
Carriers and brokers can look up active insurance filings through FMCSA's Licensing and Insurance public lookup (li-public.fmcsa.dot.gov). This system shows whether a filing is active, the effective date, and whether a cancellation has been filed. A certificate of insurance issued to a broker does not appear here and cannot substitute for an active filing record.
Who this guide helps
- New authorities tracking insurance filings
- Carriers reviewing FMCSA public records
- Office staff asked why a filing has not posted yet
What this guide can clarify
- Difference between proof forms and the underlying policy
- Why providers submit filings
- When BMC-91X may appear in layered insurance arrangements
Where paperwork gets misread
What this guide does not replace
- A form the carrier usually files directly
- A certificate of insurance for a broker
- Proof that cargo or physical damage is covered
Review mistakes to avoid
- Assuming a COI means the FMCSA filing posted
- Calling FMCSA before confirming the provider submitted the form
- Confusing BMC forms with MCS-90 endorsement language
- Ignoring cancellation filings
Records to pull before you act
- MC/docket number
- Insurance provider or filing service contact
- Authority application timeline
- Public liability limits
- FMCSA record lookup
Questions to bring to the agent
- Which form will the provider submit?
- When should the filing appear in FMCSA records?
- Who follows up if the public record does not update?
Sources
- Insurance Filing Requirements Official Federal Motor Carrier Safety Administration — checked 2026-05-19
- What forms are required for insurance and where can I find them? Official Federal Motor Carrier Safety Administration — checked 2026-05-19
- How can insurance companies file forms online? Official Federal Motor Carrier Safety Administration — checked 2026-05-20
- 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
Who submits BMC-91 to FMCSA?
The insurance company or financial responsibility provider submits these forms electronically, according to FMCSA materials. Carriers cannot file a BMC-91 themselves through a standard broker upload.
Can a broker verify my BMC filing is active?
Yes. Brokers can check filing status directly through FMCSA's li-public.fmcsa.dot.gov lookup by USDOT or MC number. An active filing will show the insurer and effective date.
What happens when a BMC filing is cancelled?
The insurer files a cancellation with FMCSA reflecting the effective date. If no replacement filing is submitted before that date, FMCSA authority may be suspended or revoked.
Found an error or outdated source? Submit a correction.