Topic cluster
Business Name & Address Changes
A change to legal business name, address, or ownership ripples through every FMCSA registration. The MCS-150 is the carrier's primary record-of-truth at the FMCSA; getting it out of sync with the LLC or the insurance filings is a frequent audit finding.
A legal-name change (LLC reformation, sole-prop to LLC, DBA add) requires a new MCS-150 within 30 days of the change. The MCS-150 is what insurance certificates, BOC-3 designations, and broker onboarding all reference.
An address change is the simplest case - file MCS-150 with the new address. FMCSA controls when the update shows in its records.
An ownership change (sale of the business, M&A) is more complex. If the EIN stays the same, MCS-150 update is enough. If the EIN changes, the FMCSA treats it as a new entity and a fresh USDOT + MC application is required. A common error: selling a single-truck business with a corporate USDOT and not realizing the buyer needs a new USDOT, not the seller's.
The cluster below covers what each type of business change requires, and the 30-day window for reporting a change.
Reviewed by Korey Sharp-Paar · Updated
Guides in this cluster
Filing MCS-150 After a Business Name or Entity Change
Changed your legal entity, DBA, or business name? Here is the FMCSA process for re-filing MCS-150 so your USDOT record matches your new paperwork.
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What Is the MCS-150B? MCS-150 vs MCS-150B, Explained
MCS-150 is the standard biennial update. MCS-150B is the hazmat-specific variant for Hazardous Materials Safety Permit carriers. Here is when each applies.
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Missed MCS-150: USDOT Deactivation Explained
A missed MCS-150 biennial update can lead to civil penalties and deactivation of your USDOT number. What it means and how to reactivate by filing the overdue update in Motus.
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Common MCS-150 Mistakes That Delay or Reject Your Filing
The most common MCS-150 errors: wrong fleet counts, cargo miscategorization, naming the wrong safety representative, and missed deadlines.
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Related resources
- USDOT PIN, FMCSA Login & Account Recovery
FMCSA's Motus system uses Login.gov for sign-in. How to set up access, link your USDOT number, and fix identity-verification problems so you can file MCS-150 on time.
- Mileage Reporting & Vehicle Counts
How to report annual mileage and vehicle counts on MCS-150, including the special-purpose / less-than-CMV rules.
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