MCS-150 Biennial Update: What It Is, When It's Due & How to File

An MCS-150 biennial update is your motor carrier safety status report filed with the FMCSA (Federal Motor Carrier Safety Administration) every 24 months from your last filing. Your specific deadline depends on when your carrier was first registered or when you last filed. Missing the deadline can result in fines, operational restrictions, or loss of interstate operating authority.

Why the MCS-150 Biennial Update Matters

The MCS-150 is one of the most overlooked yet critical compliance tasks for motor carriers. The FMCSA uses this report to maintain current information about your company—your official address, phone, equipment, drivers, and safety programs. When you skip it, the FMCSA assumes your registration is stale, and regulators may downgrade your safety rating or place restrictions on your operating authority.

For owner-operators and small carriers, the biennial cycle can be easy to forget, especially when you're juggling dispatching, billing, and road time. One missed MCS-150 deadline doesn't always trigger an immediate shutdown, but it flags your carrier number in the FMCSA's system, and subsequent oversights compound the risk.

What Information the MCS-150 Covers

The form contains several sections. Here's what the FMCSA expects to stay current:

Understanding Biennial Deadlines

The 24-month clock starts from your original FMCSA registration date or from your last MCS-150 filing—whichever is more recent. For example, if you were registered on March 15, 2023, your first biennial deadline falls on March 15, 2025. Your second is due March 15, 2027.

Deadline dates don't vary by state—the FMCSA sets them nationally based on your carrier number's history. However, some states impose their own motor carrier registration renewals on their own schedules, which can coincide with the federal biennial cycle or fall on different dates. Check with your state's transportation or motor carrier division to avoid stacking multiple compliance deadlines simultaneously.

The FMCSA typically sends a reminder email to the registered principal place of business 60–90 days before the deadline. Many carriers miss this email because:

• It goes to a mailbox no one checks regularly
• The email domain changed after registration
• Multiple owners didn't update who receives notices

How to File Your MCS-150 Update

1. Log in to FMCSA WebCert. Visit the FMCSA's online portal (fmcsa.dot.gov) and access WebCert with your carrier account credentials. If you don't have a login, you'll need to create one using your DOT number.
2. Review current information. The system displays your registered data. Check each field for accuracy—address, contact names, equipment counts, and safety history.
3. Update changed information. If you've relocated, added vehicles, hired drivers, or changed insurance, update those sections. Leave accurate sections as-is.
4. Confirm or upload insurance proof. The FMCSA requires current proof of liability insurance. You'll either confirm existing coverage or upload a recent declaration page.
5. Review the hazmat section. If you haul hazmat, confirm details. If not, ensure the form reflects non-hazmat status.
6. Submit the filing. Complete the submission. The FMCSA sends a confirmation email. Print or save this confirmation for your records.
7. Wait for processing. Most online filings are processed within 24–72 hours. Your carrier status updates in the FMCSA database once approved.

Total time required: 20–45 minutes if your information is current. Longer if you need to gather insurance documents or verify address records.

Filing Outside the Online Portal

Carriers can also file through an authorized service provider (ASP). These companies handle the MCS-150 submission on your behalf. They charge a fee (typically $25–$75 per filing) but handle tracking and reminders. Many 3PL software platforms and fleet management tools integrate MCS-150 filing, which can simplify tracking if you use one. Additionally, your insurance broker or DOT compliance consultant can file on your behalf if you provide written authorization.

Common Filing Mistakes and How to Avoid Them

Submitting incomplete insurance information: The FMCSA won't process an update if insurance proof is missing or expired. Gather your current liability declaration page before filing, and confirm the expiration date is at least 30 days after your submission.

Using outdated contact information: If you've moved offices or changed your primary phone number, update it. Regulators use this info to contact you about audits or violations.

Forgetting hazmat status changes: If you recently added hazmat to your operation or stopped hauling it, you must update this field. Misrepresenting hazmat status can result in operational fines.

Treating the biennial update as optional: It is not. The FMCSA treats an overdue MCS-150 seriously. Out-of-compliance status can prevent new bids, alert shippers to avoid your company, and trigger surprise roadside inspections with heightened scrutiny.

Filing too early or too late: File within 30 days before your deadline and up to the deadline itself. Filing more than 30 days early sometimes triggers processing delays; filing after the deadline looks like negligence and may incur penalties.

Tracking Your MCS-150 Cycle

The best way to stay compliant is simple: mark your biennial deadline on a calendar—both a physical one in the office and a digital reminder. Many carriers use a checklist that combines their MCS-150 deadline with other biennial compliance tasks: driver medical card renewals, annual vehicle inspections, IFTA registration, and UCR renewals often cluster around the same time of year. Bundling these reviews into one compliance cycle every 12–24 months reduces the risk of missing one. Tools like FleetClear can monitor these deadlines for you and send reminders at the 60, 30, and 7-day marks, so you're not relying on email alone.

What Happens if You Miss the Deadline

The consequences depend on how long you're overdue. A filing missed by a few days may only trigger a notice. A filing missed by weeks or months can result in:

• Fines ranging from hundreds to thousands of dollars (amount varies by state and FMCSA region)
• Your carrier number flagged as non-compliant in SafetyStat
• Temporary suspension of certain operating authorities
• Increased likelihood of detailed roadside inspections
• Difficulty renewing insurance or bonding
• Customer loss (many shippers check FMCSA compliance status before hiring)

If you realize you've missed your deadline, file immediately and contact your regional FMCSA office to inquire about penalty mitigation. Small carriers often receive warnings on a first offense, especially if you file within a reasonable time after the deadline.

Frequently Asked Questions

Can I file my MCS-150 early to get ahead of the deadline?

Yes, but not too early. The FMCSA allows filings up to 30 days before your deadline. Filing early is smart if you know your deadline is approaching and you want to clear it off your list. However, filing significantly earlier than 30 days can sometimes trigger processing delays or system issues, so there's no major advantage to filing months early.

What if my insurance lapses between my MCS-150 filing and the next deadline?

You must file a new MCS-150 within 10 days of the lapse or change in insurance. This is separate from your biennial update. Insurance lapses are especially serious because they break the law. If a state motor carrier inspector pulls you over and your insurance has lapsed, the carrier can be placed out of service immediately. Use calendar reminders for your insurance renewal dates—don't assume the biennial MCS-150 cycle covers insurance changes.

Do I need to file an MCS-150 update if nothing about my operation has changed?

Yes. The FMCSA requires you to file every 24 months regardless of whether information has changed. This is treated as a compliance certification—you're affirming that the registered information is still accurate. Even if nothing changed, you file and confirm the existing data.

What if I sold my company or went out of business?

You must file a cancellation form, not an update. Contact the FMCSA to request a form to officially close your carrier account. Operating under a cancelled number is illegal and can result in fines and operational authority revocation. If you've merged with another carrier or transferred operations, file the appropriate change notice instead of ignoring the deadline.