Guide · MCS-150
MCS-150 biennial update: when yours is due
Rule checked on October 14, 2026: 49 CFR 390.19T(b) and FMCSA's “Updating Your Registration” page.
Not sure when you last updated? The free DOT check shows the MCS-150 date on your FMCSA record.
Run the free DOT checkThe MCS-150 keeps your USDOT record current: company details, operation type, trucks, drivers and mileage. FMCSA requires an update every 24 months, even if nothing has changed. You also need to file one before you start operating.
The due-date rule
- Month: the last digit of your USDOT number sets the month. Your update is due by the last day of that month.
- Year: if the next-to-last digit is odd, you file in odd-numbered years. If it's even, you file in even-numbered years.
| USDOT number ends in | Due 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 |
Example: USDOT 1234567 ends in 7, so it's due by July 31. The next-to-last digit is 6 (even), so it's due in even years: July 31, 2026, then July 31, 2028.
Runs in your browser. The number isn't sent anywhere.
What happens if you miss it
FMCSA says a missed biennial update leads to deactivation of your USDOT number and may bring civil penalties of up to $1,000 per day, up to $10,000.
It's free to file
FMCSA doesn't charge for the update. Be wary of letters or emails that look official and ask for a fee to “file your MCS-150.” Instructions are on FMCSA's Updating Your Registration page.
Official sources (checked October 14, 2026):
Informational only, not legal advice. HaulLedger Studio is a private company, not affiliated with FMCSA, USDOT, the UCR Plan or any government agency. Rules and fees can change; confirm on the official site before you file.