MCS-150 and biennial update guides
Plain answers about the MCS-150 biennial update, checked against 49 CFR 390.19T, FMCSA's registration pages and the official form instructions.
MCS-150 due dates by USDOT number
Which month and which years, with every two-digit ending.
How to update your MCS-150 online
Log in to Motus, claim your USDOT number and file. Free.
The MCS-150 form, item by item
Which version you file and exactly what a biennial update asks.
The DOT biennial update explained
Who files, how often, and what to do if you stopped operating.
Missed your MCS-150 update?
What happens, the 2026 pause, and how to get current.
Biennial update scams
Letters that charge for a free filing, and how to check them.
Want the answer for one company? Look up a USDOT number to see its next due date and the last update on file.