The Federal Motor Carrier Safety Administration (FMCSA) has announced that starting October 1, 2025, the MC number will no longer be used as an identifier for trucking authority. Instead, the USDOT number will become the primary and only identifier for carriers operating in interstate commerce.
While this deadline is quickly approaching, many in the industry believe it could be extended. At Operating Authority, we’ll be closely monitoring the situation to keep our clients informed and prepared – whether you already have your authority or are just starting your trucking business.
What Is the MC Number?
The MC number (Motor Carrier number) has traditionally been issued by the FMCSA to identify carriers authorized to transport regulated commodities across state lines. It essentially served as proof that a company had operating authority to haul for-hire freight.
What Is the USDOT Number?
The USDOT number is assigned to all motor carriers and is used by the FMCSA to track safety information, compliance reviews, inspections, and audits. Moving forward, the USDOT number will be the single identifier that consolidates a carrier’s safety and authority profile.
Why the Change Matters
This shift streamlines the FMCSA’s system by using one number instead of two. For carriers, it means less confusion between numbers – but also new requirements for updating records and ensuring your operating authority is active and accurate before the transition.
Key Deadline: October 1, 2025
The FMCSA has stated the change will take effect on October 1, 2025. However, as with many regulatory rollouts, it’s possible the deadline will be pushed back. Even so, carriers should not wait. Staying proactive will help you avoid delays, penalties, or disruptions to your authority.
Steps Carriers Should Take Before the Deadline
- Verify Your USDOT Information – Ensure your company name, address, and contact details are correct in the FMCSA system.
- Check Your Authority Status – Confirm that your operating authority is active and linked properly to your USDOT number.
- Update Insurance Filings – Make sure your insurance provider has your USDOT number correctly on file.
- Renew and File Updates on Time – Keep your biennial MCS-150 updates current.
- Work With a Compliance Partner – Regulations can change quickly. Having a trusted partner ensures you never miss a step.
How Operating Authority Can Help
At Operating Authority, we specialize in helping carriers stay compliant through every stage of business. Whether you’re applying for new authority, renewing, or making sure your records are accurate before the October 1, 2025 transition, our team is here to guide you.
We’ll:
- Verify your USDOT and authority records.
- Assist with updates and insurance filings.
- Keep you informed of any FMCSA extensions or changes.
- Support new carriers applying for authority under the new system.
- Stay Ahead of FMCSA Changes
Even if the FMCSA delays this transition, being prepared puts your business in the best position to succeed. At Operating Authority, we’ll continue to monitor the situation and provide updates as new information is released.
Don’t wait until the last minute – contact us today to make sure your USDOT records and authority are ready for the October 1, 2025 deadline.