DOT Guides › MCS-150 due date by the last digits of your USDOT number
MCS-150 due date by the last digits of your USDOT number
Under 49 CFR 390.19T, your biennial update is due by the last day of a month set by the last digit of your USDOT number, in odd or even years set by the next-to-last digit.
| Last digit | Due by end of |
|---|---|
| 1 | January |
| 2 | February |
| 3 | March |
| 4 | April |
| 5 | May |
| 6 | June |
| 7 | July |
| 8 | August |
| 9 | September |
| 0 | October |
| Next-to-last digit | File in |
|---|---|
| Odd (1, 3, 5, 7, 9) | Odd-numbered years (2027, 2029...) |
| Even (0, 2, 4, 6, 8) | Even-numbered years (2026, 2028...) |
Example: USDOT 1234567: last digit 7 = July; next-to-last 6 = even, so July 2026, 2028, and so on.
You can file any time in the 12 months before your due date. Filing is free with FMCSA. FMCSA has paused enforcement for updates due on or after June 1, 2026 while Motus stabilizes (FMCSA notice).
Questions
Does a one-digit USDOT number have a next-to-last digit?
If your USDOT number has only one digit, the rule treats the next-to-last digit as zero, which means even years.
Is filing the MCS-150 free?
Yes. Filing the biennial update directly with FMCSA costs nothing.
Official sources
Last reviewed October 16, 2026. DOT Due Dates is an independent private service. It is not affiliated with, endorsed by, or operated by FMCSA, the U.S. Department of Transportation, the IRS, the UCR Plan, IFTA, Inc., or any state agency. Information is for general reminders only and is not legal or tax advice. Always confirm requirements and due dates with the agency. We do not file anything for you, and all of these filings can be done directly with the agencies.