When is my MCS-150 biennial update due?

Under 49 CFR 390.19(b), the last digit of your USDOT number sets the month (1 = January through 9 = September, 0 = October) and the next-to-last digit sets the year: odd digits file in odd-numbered years, even digits in even-numbered years. The update is due by the last day of that month.

Does it cost anything to file the MCS-150?

No. FMCSA does not charge a fee to file the MCS-150 biennial update. Private companies that offer to file it for you charge their own service fees.

What happens if I don't update my MCS-150?

FMCSA can deactivate the USDOT number of a carrier that fails to file its biennial update, and the carrier can face civil penalties. A deactivated carrier cannot legally operate until the registration is updated.

Do I have to file the MCS-150 if nothing changed?

Yes. The biennial update is required every 24 months even if none of your information changed. You confirm or update the details, including mileage, fleet size and driver count.

MCS-150 Update Due Date Calculator: When Is Your Biennial Update Due?

Every motor carrier must update its USDOT registration (form MCS-150) every two years, on a schedule set by its USDOT number. Enter your number to see your next deadline.

How the MCS-150 schedule works

The filing schedule is in 49 CFR §390.19(b). Two digits of your USDOT number decide the deadline:

The last digit sets the month. The update is due by the last day of that month.
The next-to-last digit sets the year. If it's odd, you file in odd-numbered years (2025, 2027...). If it's even, you file in even-numbered years (2026, 2028...).

Last digit of USDOT number	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

Example: USDOT number 1234567 ends in 7, so the update is 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.

Who must file the MCS-150

Every company with a USDOT number must file the biennial update, whether it's an interstate carrier, a Texas intrastate carrier with a USDOT number, a hazmat shipper or a private fleet. You must file every 24 months even if nothing has changed. You must also file an update whenever key details change, such as your address, legal name, or type of operation, and before you begin operations.

How to file the MCS-150 update (free)

Gather your current numbers: power units, drivers (including CDL drivers), and vehicle miles traveled in the last 12 months.
Go to FMCSA's registration system and choose to update your registration. FMCSA's Updating Your Registration page links to the current online process. You'll need your USDOT number and FMCSA login or PIN.
Review every section: company details, operation classification, cargo classifications, fleet size and drivers.
Sign and submit. Keep the confirmation.

FMCSA doesn't charge to file the MCS-150. Letters and emails offering to file it for a fee come from private companies, some of which look official. You can always file it yourself for free.

What happens if you miss the deadline

FMCSA can deactivate the USDOT number of a carrier that doesn't file its biennial update. A carrier with an inactive USDOT number can't legally operate, and roadside inspectors can place the vehicle out of service. Missing the update can also bring civil penalties. If your deadline has passed, file the update as soon as possible.

Why the MCS-150 matters for safety data

The fleet size and mileage on your MCS-150 are used to calculate parts of your CSA percentiles, such as the Unsafe Driving and Crash Indicator measures. Out-of-date numbers can make your safety measurements worse. The last update date is shown on every company page in our DOT number lookup.