Your policy is a contract between you and your insurer. The BMC-91X is the insurer’s certification to FMCSA that the policy exists, what limit it carries toward the minimum for what you haul, and that the federal MCS-90 endorsement is attached. You don’t file it; your insurer does, electronically, through a filer account registered with FMCSA, under your USDOT and docket numbers. A BMC-91 does the same job for one policy at the full limit; a 91X can show full coverage or a stack of policies from more than one insurer. Household goods carriers add a BMC-34 for cargo, brokers and freight forwarders file a BMC-84 bond or BMC-85 trust instead of a liability certificate, and a BMC-35 is the notice that cancels a filing. Anyone can look up what is on file.
What the filing does
FMCSA will not grant operating authority until the minimum financial responsibility required by 49 CFR Part 387 is on file. Under § 387.311, a BMC-91 always represents the full minimum limit required for that carrier, and a BMC-91X represents either the full limit or the specific limit shown on its face. Every policy behind a filed certificate has to carry the endorsement FMCSA prescribes, and the certificate has to accurately reflect it; under § 387.313T, where DOT’s own minimums apply, that endorsement is the MCS-90 for an insurance policy.
The filing is neither the policy nor the endorsement; it is the insurer’s statement to FMCSA, under your USDOT and docket numbers, that a qualifying policy is in force. Once authority is granted, proof of insurance and your process agent designation must stay on file to avoid revocation proceedings; FMCSA says keeping them current is your job.
BMC-91 vs. BMC-91X, and the other BMC forms
- BMC-91 is filed for the full liability limit: one insurer, one policy, the whole amount.
- BMC-91X can represent full coverage or any level of aggregation; when insurers stack policies to reach the minimum, each files its own 91X showing whether its policy is primary or excess and, if excess, the underlying amount and the maximum limit.
- BMC-82 is the surety bond filed in place of a liability certificate.
- BMC-34 is the cargo certificate (BMC-83 for a cargo bond). FMCSA’s chart requires it only of household goods carriers and household goods freight forwarders, at $5,000; every other entity type shows $0.
- BMC-84 and BMC-85 are the $75,000 broker surety bond and trust fund agreement under § 387.307; FMCSA’s chart lists the same forms and amount for freight forwarders.
- BMC-35 and BMC-36 are the notices of cancellation for insurance policies and surety bonds; the BMC-85 form doubles as the cancellation notice for a trust fund.
FMCSA’s chart puts the liability minimums at $750,000 for for-hire carriers of non-hazardous property in vehicles of 10,001 pounds GVWR or more, $300,000 below that weight, $1,000,000 for certain hazardous materials and $5,000,000 for explosives, poison gas or radioactive materials.
Who files it, and how
You can’t file a BMC-91X yourself. FMCSA says a financial responsibility provider files the form on the applicant’s behalf, after registering with FMCSA for a filer account. § 387.323T lets registered insurers file Forms BMC-34, 35, 36, 82, 83, 84, 85, 91 and 91X electronically, and FMCSA stopped accepting paper transactions on September 30, 2025. Filer registration now runs through Motus, the USDOT Registration System launched in May 2026, which FMCSA’s Federal Register notice says filers use to submit or remove filings.
Timing matters. If nothing is on file within 20 days after your application is published in the FMCSA Register, FMCSA serves a decision that the application will be dismissed unless you comply within 60 days. The full sequence for getting MC authority, and the BOC-3 process agent filing that goes in alongside the insurance.
How it relates to the MCS-90
The MCS-90 is an endorsement attached to your liability policy; the BMC-91X is the certificate that tells FMCSA the endorsed policy exists. Under § 387.7 the proof a carrier keeps at its principal place of business is the MCS-90 (or an MCS-82 surety bond, or FMCSA’s written authorization to self-insure), and § 387.311 says the filed certificate must accurately reflect that endorsement. What the MCS-90 endorsement actually does.
Two notice periods apply. Under § 387.7, cancelling the policy takes 35 days’ written notice between insurer and carrier, counted from the date it is transmitted. Under § 387.313T, a certificate on file can’t be cancelled or withdrawn until 30 days after written notice on a BMC-35 (BMC-36 for a bond) is submitted, counted from the date FMCSA actually receives it.
How to check what’s on file
FMCSA’s Licensing and Insurance (L&I) search at li-public.fmcsa.dot.gov is public, takes a USDOT or docket number, and was still answering as of October 2026. Active/Pending Insurance shows the form, type of insurance, insurer, policy or surety number, coverage amount, effective date and any pending cancellation date. Rejected Insurance lists filings FMCSA bounced in the prior 12 months and why. Insurance History shows everything on record since 1995.
Motus launched in May 2026; FMCSA’s Federal Register notice says the public will be able to search an entity’s registration record there and that the L&I system will be sunset. A certificate of insurance from an agent shows what the policy says; the FMCSA record shows what the government has. Why a COI is not a federal filing.
Cancellation, replacement and lapses
A BMC-35 starts the 30-day clock, and the L&I screens show the pending cancellation date for a reason: no replacement on record by then means revocation proceedings. Under § 387.313T a replacement certificate FMCSA accepts ends the retiring insurer’s liability on the replacement’s effective date, so the new filing has to be in before the old one drops. For brokers, § 387.307 allows the BMC-84 bond or BMC-85 trust to be cancelled only on 30 days’ written notice, and if the surety or financial institution reports the fund below $75,000, FMCSA warns the broker of suspension within seven business days unless it shows the notice was in error, the fund was restored, or the claims were paid without using it.
When I place a policy that needs a filing, I ask the insurer for it the day the policy binds and confirm it on the L&I screen, not by email. Commercial trucking insurance, including what underwriters ask for before an insurer will issue the filing.
Common questions
Is the BMC-91X the same as the MCS-90?
No. The MCS-90 is an endorsement attached to your liability policy. The BMC-91X is the certificate your insurer files with FMCSA to show the endorsed policy exists and what limit it carries.
Why does my record show a BMC-91X when I only have one insurance company?
Under § 387.313T a BMC-91X can represent full coverage as well as any level of aggregation, so an insurer can use it for a single policy at full limits. A 91X on file does not by itself mean your coverage is split; the certificate shows the limit and whether it is primary or excess.
Can I file a BMC-91X myself?
No. FMCSA says a financial responsibility provider files the form on the applicant’s behalf, through a filer account registered with FMCSA, and filer registration now runs through Motus. Your job is to make sure the filing shows up under your USDOT and docket numbers.
Do I need a BMC-34 cargo filing?
Only if you are a household goods carrier or household goods freight forwarder; FMCSA’s chart shows a $5,000 cargo requirement for them and $0 for every other entity type. Other carriers still buy cargo coverage for their shippers and brokers, it just isn’t filed with FMCSA.
How much notice does FMCSA get before a filing is cancelled?
30 days. Under § 387.313T a certificate or bond on file can’t be cancelled or withdrawn until 30 days after written notice on a BMC-35 or BMC-36 is submitted, and the period runs from the date FMCSA actually receives the notice.
Sources
- 49 CFR § 387.313T (LII): forms and procedures, BMC-91 vs. BMC-91X, MCS-90, 30-day cancellation notice from actual receipt, termination by replacement
- 49 CFR § 387.323T (LII): electronic filing of certificates, bonds, trust agreements and cancellations by insurers registered with FMCSA
- 49 CFR § 387.311 (LII): what a BMC-91 and BMC-91X represent, primary/excess disclosure, endorsement reflected on the certificate
- 49 CFR § 387.307 (LII): property broker surety bond or trust fund, BMC-84/BMC-85, 30-day cancellation notice, suspension when the fund falls below $75,000
- 49 CFR § 387.7 (LII): financial responsibility required, MCS-90 and MCS-82 proof, 35-day policy cancellation notice
- FMCSA: Insurance Filing Requirements (forms and limits chart, provider files on applicant’s behalf, 20-day window, filer registration through Motus, revocation proceedings)
- FMCSA Licensing & Insurance public search: Carrier Search (USDOT or docket number; live October 2026)
- FMCSA Licensing & Insurance public search: Motor Carrier Details help page (Active/Pending, Rejected and History screens)
- FMCSA Registration: Motus launch (May 2026) and end of paper transactions (September 30, 2025)
- Federal Register notice: Availability of Motus, FMCSA’s New Registration System (FR Doc. 2026-08334)
General information about FMCSA financial responsibility filings (Forms BMC-91, BMC-91X, BMC-34, BMC-84, BMC-85 and BMC-35) as of October 2026, not legal or tax advice; 49 CFR Part 387 and FMCSA’s current procedures control. Coverage depends on underwriting and the terms, conditions and exclusions of the policy actually issued.