Missing Your MCS-150: USDOT Deactivation and Reinstatement

A missed MCS-150 does not sit quietly in the background. 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. Here is how the deadline is set (by the biennial update rule), what deactivation means, and how to reinstate.

What Happens After the Deadline

Your MCS-150 is due by the last day of the month set by the last digit of your USDOT number, in the even or odd year set by the next-to-last digit. Once the end of that due month passes with no filing on record, the biennial update is overdue, and the USDOT number can be deactivated. FMCSA does not publish a fixed day count for when that happens, so treat the end of the due month as the real deadline.

What “INACTIVE” Means in Practice

An INACTIVE USDOT number shows on FMCSA's public records, where brokers, shippers, and insurers who check your SAFER record will see it. Under 49 CFR Part 390, the USDOT registration has to be kept current for interstate operation, and 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.

USDOT Deactivation vs Operating Authority

The MCS-150 is about the USDOT number, not operating authority. The two are separate records and are often confused:

• USDOT deactivation is administrative. Filing the overdue MCS-150 reactivates the USDOT number once FMCSA processes it.
• Operating authority (MC number) is granted under 49 CFR Part 365 and depends on insurance on file under Part 387 and a BOC-3 under Part 366. If authority was revoked for another reason, such as an insurance lapse, revoked MC authority requires a separate reinstatement — an MCS-150 alone does not restore it.

The practical takeaway: file the overdue MCS-150 as soon as you notice.

How to Reinstate a Deactivated USDOT

For a straightforward MCS-150 deactivation, the reinstatement process is simply filing the missing update:

1. Sign in to Motus at motus.dot.gov with your Login.gov account (our Login.gov sign-in guide covers access problems).
2. File the overdue MCS-150 as you normally would — current fleet, mileage, and address data. The full Motus walkthrough lives in our step-by-step filing guide.
3. Check your record. FMCSA controls when the update shows in its records; look up your status in FMCSA's Motus public search by USDOT number or company name.
4. Notify downstream partners — brokers, load boards, insurance — so they re-run their checks once the record is updated.

If your MC authority was revoked for another reason, a separate reinstatement application is required in addition to the MCS-150. That route is covered in the operating authority reinstatement guide.

Penalties

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. Filing the update is the fix.