Compliance FAQ
Do I need MCS-150 if I only have an MC number?
Yes - if you have an MC, you also have a USDOT, and the USDOT is what triggers the MCS-150 biennial requirement. The MC application requires a USDOT first; both numbers move in tandem. A missed biennial update can lead to civil penalties and deactivation of the USDOT number (49 CFR 390.19T(b)(4)). FMCSA has temporarily suspended enforcement and USDOT inactivation for biennial updates due on or after June 1, 2026; the update is still required.
Reviewed by Korey Sharp-Paar · Updated
Why does it matter?
MC and USDOT are linked. FMCSA does not issue an MC without a USDOT in place - Form OP-1 explicitly requires the USDOT field. Once both are issued, both run on parallel maintenance schedules: operating authority under 49 CFR Part 365 (insurance on file under Part 387 and a BOC-3 under Part 366), USDOT under §390.19T with the MCS-150 biennial.
When the MCS-150 lapses, the USDOT number can be deactivated. A carrier with a deactivated USDOT number can't operate until the update is filed.
Reactivation requires filing the missed MCS-150. There is no FMCSA fee to file it. FMCSA controls when the update shows in its records.
Owner-operators sometimes assume that paying their UCR and maintaining insurance covers all the maintenance - they do not. MCS-150 is a separate biennial filing on the USDOT side that must be done independently.
Start your MCS-150 update online
We prepare your MCS-150 update; it is submitted to FMCSA in Motus by you or a filer you authorize. FMCSA charges no fee to file the MCS-150. Our service fee and any add-on are itemized before you pay.
Submitted to FMCSA in Motus by you or a filer you authorize.
Independent filing service operated by Fast Filing Group LLC. Not affiliated with FMCSA, USDOT or any government agency.