TL;DR: BMC-91 and BMC-91X are electronic certificates of insurance your insurer files with FMCSA to prove you carry required liability coverage. BMC-91 is used when one insurer provides the full limit. BMC-91X covers full coverage or stacked layers from several insurers. Carriers never file these forms themselves.
What is a BMC-91 filing?
A BMC-91 is a certificate of insurance that your insurer transmits electronically to FMCSA. It certifies that you carry public liability coverage, meaning bodily injury, property damage, and environmental restoration, at the limits federal law requires for your operation. Under 49 CFR 387.301, a for-hire carrier cannot receive or keep operating authority unless an acceptable filing is on record. The BMC-91 is used when a single insurer writes your full required limit.
When is a BMC-91X used instead?
The BMC-91X does the same job with more flexibility. Under 49 CFR 387.313, a BMC-91X can certify either full coverage or any level of aggregation, which means two or more insurers each covering a layer that together reach the required limit. A common example is a primary policy at $750,000 topped by an excess layer at $250,000 to reach a required $1,000,000. Each insurer in the stack files its own certificate.
| Form | What it certifies | Typical use |
|---|---|---|
| BMC-91 | Full required limit from one insurer | Single-carrier liability policy |
| BMC-91X | Full limit or an aggregated layer | Stacked or layered liability programs |
| BMC-82 | Surety bond instead of insurance | Rare, bond-backed carriers |
Who actually files the form?
Only the insurance company. Under 49 CFR 387.323, insurers make these filings electronically through FMCSA's Licensing and Insurance system, and they must hold a filer account to do it. You cannot file a BMC-91 yourself, and no agent can hand you one to upload. Your job is to confirm the filing landed. Anyone can check a carrier's filing status on FMCSA's public Licensing and Insurance website using the docket or USDOT number.
What limits does the filing have to show?
The filing must match the minimums in 49 CFR 387.303, which mirror the coverage floors of 49 CFR 387.9 in effect since January 1, 1985: $750,000 for for-hire non-hazardous freight in vehicles rated 10,001 pounds or more, $1,000,000 for oil and most listed hazardous materials, and $5,000,000 for bulk high-hazard commodities. Fleets running only vehicles under 10,001 pounds hauling non-hazardous property file at $300,000. Passenger carriers file at $1,500,000 or $5,000,000 depending on seating capacity.
When must the filing be in place?
For a new authority, the clock is tight. Once FMCSA publishes your application in the FMCSA Register, your insurer's filing and your Form BOC-3 process-agent designation must be on file within 20 days under 49 CFR 365.109T. If FMCSA has received nothing from your insurer within 90 days of publication, the application is dismissed and you start over. For carriers already running, the filing must simply never lapse, because a dead filing triggers the revocation process.
What about cancellation notices?
When a policy backing a BMC-91 or BMC-91X is being cancelled, the insurer files a notice of cancellation, Form BMC-35, with FMCSA at least 30 days before the effective date. That 30-day window is your warning period to get replacement coverage filed. If the old filing dies with nothing new on record, FMCSA moves to revoke your authority. The safe play is to have the new insurer file before the old policy's last day, so the Licensing and Insurance record never shows a gap.
How do I check my filing is active?
Search FMCSA's public Licensing and Insurance site by USDOT or MC number. The record shows the insurer name, form type, coverage amount, and effective date. Check it when you first get authority, at every renewal, and any time you switch insurers. A filing that looks fine to your agent but never posted is one of the most common ways new carriers get stuck at the dock.
Real questions new authorities and fleet managers ask
Can I file a BMC-91 myself?
No. Under 49 CFR 387.323 only insurance companies with FMCSA filer accounts can submit BMC-91 and BMC-91X certificates, and they file electronically. Your role is to verify the filing posted, which you can do free on FMCSA's Licensing and Insurance website.
What is the difference between BMC-91 and BMC-91X?
BMC-91 certifies the full required limit from a single insurer. BMC-91X can certify full coverage or a layer that stacks with other insurers to reach the limit. Layered liability programs use one BMC-91X per insurer in the stack.
How fast does a BMC-91 filing post after I bind coverage?
Electronic filings often post within a business day or two, but timing varies by insurer. For new authority, the filing must be on record within 20 days of your FMCSA Register publication, so bind early rather than waiting until the deadline.
Does a BMC-91 filing replace the MCS-90 endorsement?
No, they work together. The BMC-91 or BMC-91X is the certificate FMCSA receives. The MCS-90 endorsement stays attached to your policy at your office as proof of financial responsibility. Most for-hire interstate carriers need both in place.
What happens if my insurer files a BMC-35?
A BMC-35 is a 30-day notice that your filing is being cancelled. Use that window to bind replacement coverage and get the new filing posted. If the notice runs out with no active filing, FMCSA begins revoking your operating authority.
Why truckers work with Morrow
- We know the filings. Morrow coordinates BMC-91 and BMC-91X filings with your insurer and verifies they show active before your authority needs them.
- New authority is our normal. First-year carriers pay the most and get declined the most. We work with markets that actually want new ventures and we tell you what the first renewal takes.
- Certificates and filings, fast. Certificates of insurance the same business day for most carriers, and federal or state filings submitted electronically so your authority is not sitting in a queue.
- We quote the whole picture. Liability, cargo, physical damage, and the endorsements shippers and brokers actually check for, priced together so nothing is missing when a load is on the line.
- Real people when something goes wrong. A claim, a lapse notice, or a lost certificate gets a person, not a portal.
Related trucking guides
Short answers to the surrounding questions truckers ask next.
- Trucking insurance at Morrow (start here)
- What is an MCS-90 endorsement?
- FMCSA filing timeline and the 20-day rule
- Insurance you need to get an MC number
- What happens if trucking insurance lapses
- Federal minimum liability limits by commodity
- Commercial auto for trucking fleets
This guide is general information, not legal, tax, or insurance advice. Limits, forms, and deadlines change, so verify current requirements with FMCSA before you rely on them. Morrow is a brand name of Afthonea Inc. Last updated: July 2026.