When to Update the MCS-150 (Biennial Update)

Purpose:

Biennial updates must be done every other year during the time period assigned by the operator's USDOT number.

When is my update due?

• When you begin your operation
• When you have a change in information
  (Address, telephone number, email, # of power units, etc)
• Every other year during your renewal period

Renewal Periods

The last digit of the USDOT number indicates the month during which filing is due. An update must be done even if a recent update has been filed.

Number ends in:
1 - January
2 - February
3 - March
4 - April
5 - May
6 - June
7 - July
8 - August
9 - September
0 - October

Second to last number:
Even number - Even numbered years
Odd number - Odd numbered years

Scams and Third Party Services

Please note, many third party services may contact a motor carrier insisting they are due for their biennial update and offering to do so for a fee. USDOT does not charge a fee for the service and in most cases it can be easily done by the operator free of charge. In addition, some companies frequently send out mailings or notices offering this service even when an update is not due in a common scam.

Can I update the MCS-150 before the due date?

Our internal policy is that we should not update the MCS-150 if it was updated less than 4 months prior to the due date.