USDOT Biennial Update (MCS‑150): What it is & when to file

Disclosure: Informational only. We are not FMCSA or USDOT. Always verify your status directly through official FMCSA systems.

Your MCS‑150 is your company profile with FMCSA. You must update it every two years or sooner if key facts change. If you miss it, your USDOT number can be inactivated and roadside problems may follow.

• Where to update: FMCSA’s page: Updating Your Registration.
• How to verify: Check your SAFER Company Snapshot.

When do I file?

• Biennially: Every 2 years, by the month and year tied to your USDOT number (see FMCSA schedule on the update page).
• Within 30 days of changes: Name, address, number of power units, miles, type of operation, or ownership, file an update.

Source: FMCSA explains the biennial update requirement and that all entities under its jurisdiction must update every two years, even with no changes. See FMCSA guidance.

What info do I need?

• USDOT and PIN (for online filing)
• Company legal/DBA names and addresses
• Power units and drivers
• Mileage and operation types
• Contact emails/phones

Common mistakes (and how to avoid them)

• Missing the month. Put the due month on your calendar now.
• Wrong counts. Update power units and drivers before filing.
• No proof saved. Save the FMCSA confirmation PDF/receipt in your portal.
• Thinking of a vendor = government. Vendors are not FMCSA. If you receive a letter that looks official, verify with FMCSA and see the agency’s note on misleading marketing.

Step‑by‑step (quick)

1. Log in to FMCSA’s portal and open MCS‑150 Update.
2. Confirm company details, operation, power units, and mileage.
3. Review and submit.
4. Download/print the final confirmation.
5. Upload it to your SafeRoad portal for easy access later.

FAQs

Avoid lapses. SafeRoad sends reminders and stores your confirmation so it’s always handy.
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