MCS-150: Biennial Update Rules for New Carriers

The MCS-150 is the company record behind your USDOT number. You file it once to get the number, then update it every two years for free. Here's your due date and how to spot the paid "renewal" pitch.

The MCS-150 is FMCSA's Motor Carrier Identification Report: the company information (name, address, operation type, trucks, drivers, mileage) behind your USDOT number. A new carrier files it before starting operations, and FMCSA issues the USDOT number once it's processed. After that, you update it every 24 months. The update is free.

If you already have a USDOT number, your first MCS-150 is done. What you need to know now is when your biennial update comes due, where to file it, and why so many people want to charge you for it.

What is the MCS-150?

An MCS-150 is the identification report every interstate motor carrier files with FMCSA. The rule in force today, 49 CFR 390.19T, says an interstate carrier must file it before it begins operations and every 24 months after that. It also says FMCSA issues the USDOT number after it receives and processes the form.

It's not your operating authority. The MC number (operating authority) is a separate registration with its own insurance filing and BOC-3. If the two still blur together, here's what a DOT number and an MC number each mean.

How does a new carrier file the MCS-150 today?

Through Motus, FMCSA's new registration system at motus.dot.gov. FMCSA's "Move into Motus" page says that's where you apply for a new USDOT number, and the rule says FMCSA issues that number after it processes your identification report.

The old Unified Registration System is gone. FMCSA's modernization FAQ says URS went permanently offline after May 14, 2026, and that the FMCSA Portal's registration options were disabled the same day. Motus launched to all users on May 19, 2026. Some older FMCSA pages still mention URS and paper forms, so go by the Motus pages.

In First Load's data, most new carriers came in through Motus. Of the 25,705 carriers that applied for operating authority between July 1 and September 30, 2026, 22,674 (88%) got their USDOT number on or after May 19, 2026, according to the public FMCSA record. The rest already had a USDOT number from before, so they were already on the two-year cycle.

When is my MCS-150 biennial update due?

It depends on the last two digits of your USDOT number. The last digit sets the month: you file by the last day of that month. The next-to-last digit sets the year: odd means odd-numbered years, even means even-numbered years. Zero counts as even.

Example: a USDOT number ending in 47. The 7 means July. The 4 is even, so the update is due by July 31 of every even year: 2026, 2028, 2030. A number ending in 32 is due by February 28 (or 29) of every odd year.

That schedule comes straight from 49 CFR 390.19T(b) and FMCSA's biennial update page. It applies even if nothing about your company changed. Among the 25,705 carriers in our July to September cohort, the split is close to even: 12,797 have an odd next-to-last digit and 12,908 have an even one.

Don't remember your USDOT number? You can find your USDOT and MC number by company name and read the last two digits off the result.

Is the biennial update being enforced right now?

Not for now. FMCSA has temporarily suspended enforcement of biennial updates and the inactivation of USDOT numbers for missed updates while Motus stabilizes. FMCSA's notice says registrants whose update was due on or after June 1, 2026 will get additional time and won't have their USDOT number inactivated for missing it.

FMCSA hasn't published an end date. The requirement itself is still in the rule, so treat the pause as extra time, not a waiver. If your deadline has passed or is coming up, file when you can and keep your confirmation.

How do I update my MCS-150 for free?

You do it yourself in Motus. FMCSA lists "Submit a Biennial Update" as one of the things a registrant can do there, and FMCSA's biennial update page says updating your information is free.

1. Go to motus.dot.gov. Type it yourself instead of clicking a link from an email or text.
2. Sign in with Login.gov and finish identity verification if you haven't yet.
3. Open your company account. If you got your USDOT number before May 2026, claim it first using the same Login.gov email you used as company official in the old FMCSA Portal.
4. Start the biennial update, review every field (address, phone, trucks, drivers, mileage, cargo) and certify it.
5. Save the confirmation. If Motus gives you trouble, FMCSA's contact center is 1-800-832-5660.

Update your record any time your business details change too, not just every two years. FMCSA asks carriers to update name, address and other details in a timely manner. A wrong phone number or address can mean you miss a real FMCSA letter, like your New Entrant safety audit notice.

Why do companies call to "renew" my MCS-150?

Because your USDOT number and contact details are public, and a biennial update is an easy thing to sell. FMCSA's fraud page says it publicly displays carrier contact information, that it doesn't use telemarketers or robocalls, and that it won't ask for a credit card number or charge a fee for its downloadable forms.

A private company can legally offer to file your update for a fee. That's their service charge, not a government fee. If you want help, fine. Just know you could do it yourself for free in Motus.

Watch the phishing too. FMCSA's fraud alerts page, last updated September 29, 2026, warns about fake "Notice of Required Off-Cycle Update" emails pushing a bogus "New MOTUS Portal." FMCSA says the only real Motus address is motus.dot.gov and that real FMCSA email comes from @dot.gov addresses. More on why the calls start the day your DOT number goes public.

What happens if I miss the MCS-150 update?

Under the rule, your USDOT number can be deactivated and you can face civil penalties. 49 CFR 390.19T(b)(4) ties a missed biennial update to the penalties in 49 U.S.C. 521(b)(2)(B) or 14901(a) and to deactivation of the USDOT number. FMCSA's biennial update page puts it as civil penalties of up to $1,000 per day, not to exceed $10,000.

During the 2026 Motus pause, FMCSA says it won't inactivate USDOT numbers for updates due on or after June 1, 2026. That can change once FMCSA announces the pause is over, so don't build your plans around it.

The MCS-150 isn't the only yearly paperwork. Interstate carriers also register with UCR every year; see UCR registration for new carriers.

First Load is a private company, not FMCSA.

Frequently asked questions

Does a new carrier have to file an MCS-150?

Yes, but you've likely already done it. 49 CFR 390.19T requires the form before you begin operations, and FMCSA issues the USDOT number after processing it. Since May 19, 2026, that happens through your USDOT application in Motus.

How much does an MCS-150 update cost?

Nothing, if you file it yourself. FMCSA's biennial update page says updating your information is free. A company that charges you is charging for its own service, not a federal fee.

Do I have to update my MCS-150 if nothing changed?

Yes. FMCSA says you have to file the biennial update every two years even if your company information hasn't changed. Your due month and year come from the last two digits of your USDOT number.

Can I still update my MCS-150 in the FMCSA Portal?

No. FMCSA says the Portal's registration options were permanently disabled on May 14, 2026. Biennial updates and other record changes are now done in Motus at motus.dot.gov.

Will my USDOT number be deactivated for a late MCS-150 right now?

Not while FMCSA's temporary suspension lasts. FMCSA says registrants whose update was due on or after June 1, 2026 won't have their USDOT number inactivated for missing it. FMCSA hasn't said when that ends, so file as soon as you can.

Sources

• eCFR: 49 CFR 390.19T, motor carrier identification reports (filing before operations, 24-month schedule, penalties and deactivation; checked October 13, 2026)
• FMCSA: Temporary Suspension of the Biennial Update Requirement (last updated September 10, 2026)
• FMCSA: Move into Motus (new USDOT applications and biennial updates in Motus)
• FMCSA: Registration Modernization FAQs (URS and Portal registration options offline after May 14, 2026)
• FMCSA: Updating Your Registration or Authority (biennial schedule, free update, penalty amounts)
• FMCSA: Fraud Alerts (bogus Motus links, aggressive telemarketing; last updated September 29, 2026)
• First Load data: FMCSA public authority and registration records, stored nightly by First Load since July 2026. Cohort: 25,705 carriers with an operating authority application dated July 1 to September 30, 2026. Counts as of October 13, 2026.

Last verified 2026-10-13 · First Load editorial · First Load is a private company, not FMCSA. The public record can lag and other requirements or holds may not show in it.