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. The change propagates to SAFER within 24-48 hours and PIN reset mail will then route correctly.
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, the typical 30-day filing window, and the audit risk of letting these slip.
Articles 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.
FMCSA Compliance · 7 min read · Updated 2026-05-02
- MCS-150 vs MCS-150B: What Is the Difference?
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.
FMCSA Compliance · 5 min read · Updated 2026-04-24
- What Happens If You Miss Your MCS-150? USDOT Deactivation Explained
Miss an MCS-150 biennial update and the FMCSA deactivates your USDOT. Learn the timeline, the revocation consequences, and how to reinstate.
FMCSA Compliance · 6 min read · Updated 2026-04-24
- 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. Here is how to avoid each.
FMCSA Compliance · 6 min read · Updated 2026-04-24