Odd or even year?
An odd next-to-last digit means odd-numbered filing years. An even next-to-last digit means even-numbered filing years.
Free compliance schedule tool
MCS-150 Due Date Checker
Calculate the standard FMCSA biennial update month, odd/even filing-year cycle, and next scheduled deadline from a USDOT number.
The result is a schedule—not a compliance decision. It does not know whether an update was already filed or whether the rule applies to a particular entity.
How the FMCSA filing schedule works
FMCSA assigns the month with the final USDOT digit and the filing-year cycle with the next-to-last digit. Updates are scheduled by the last day of the assigned month.
| Final digit | File by the last day of |
|---|---|
| 1 | January |
| 2 | February |
| 3 | March |
| 4 | April |
| 5 | May |
| 6 | June |
| 7 | July |
| 8 | August |
| 9 | September |
| 0 | October |
Current Motus transition notice
Inactivation is temporarily suspended
FMCSA says it temporarily suspended USDOT inactivation for missed required biennial updates during Motus stabilization. The agency still directs registrants to complete required updates and says more guidance will follow.
Read the current FMCSA noticeWhat to check after calculating
- 1. Confirm the USDOT number. Similar company names can point to different records.
- 2. Review the reported MCS-150 date. A schedule alone does not show whether FMCSA received an update.
- 3. Use Motus for protected actions. FMCSA now manages registration updates through its current system.
- 4. Keep confirmation evidence. Save FMCSA's confirmation for the actual submission.
Use the official record for action
USDOTData helps calculate and inspect public carrier information. Only FMCSA can receive the update or confirm its regulatory status.
MCS-150 due date questions
How is an MCS-150 biennial update date calculated?
FMCSA uses the final digit of the USDOT number for the filing month and the next-to-last digit for the odd- or even-numbered filing-year cycle. The filing is scheduled by the final day of that month.
Does this checker show whether a carrier already filed?
No. It calculates the standard schedule only. Check the carrier record and the current FMCSA Motus registration record for filing history and current status.
Must an entity update when its information has not changed?
FMCSA says entities under its jurisdiction must provide the biennial update every two years even when their information has not changed. Confirm how the rule applies to the specific entity with FMCSA.
Is FMCSA currently inactivating USDOT numbers for missed biennial updates?
FMCSA announced a temporary suspension of USDOT inactivation for entities that have not completed a required biennial update during Motus stabilization. The filing requirement remains, and the agency says it will publish additional guidance.
