How do you get a USDOT and MC number?
A USDOT number identifies your vehicles in FMCSA safety records and is required for most interstate commercial motor vehicles — it is free. An MC number is your interstate operating authority to haul regulated freight for hire, and it requires a filing fee, a BOC-3, and proof of insurance before it activates. You apply through the FMCSA Unified Registration System, and most new carriers are active in about three to four weeks, including the mandatory ~21-day vetting period.
How to get your USDOT and MC number
Decide which numbers you need
Nearly every interstate commercial motor vehicle needs a USDOT number. If you haul regulated freight for hire across state lines, you also need MC operating authority. Intrastate-only carriers in some states, like Florida, may have separate state requirements instead.
Register with the FMCSA
Apply through the FMCSA Unified Registration System (URS). You provide your business details, vehicle and driver counts, and cargo classifications. The USDOT number is issued at no cost.
Apply for operating authority (MC)
For-hire carriers of regulated commodities file for MC authority and pay the FMCSA operating-authority fee (currently $300 per authority type). This is the step that separates for-hire carriers from private ones.
File your BOC-3 and insurance
Before authority activates, you must have a BOC-3 (process agents in every state) on file and the required liability insurance — typically $750,000 to $1,000,000 — filed with FMCSA by your insurer.
Clear the vetting period
New authority goes through a roughly 21-day vetting and protest period before it becomes active. Once active, you can legally operate for hire in interstate commerce.
Keep it compliant
After activation, keep your MCS-150 updated every two years, maintain UCR registration, and stay current on insurance so your authority isn't revoked.
Common questions
Is a USDOT number free?
Yes — the FMCSA issues USDOT numbers at no cost. The paid step is MC operating authority, which carries the FMCSA filing fee (currently $300 per authority type) plus your BOC-3 and insurance.
How long does it take to get MC authority?
Most new carriers are active in about three to four weeks. The timeline is driven mainly by the mandatory ~21-day vetting and protest period after you file; your BOC-3 and insurance must be on file before it can activate.
Do I need both a USDOT and an MC number?
If you operate commercial vehicles in interstate commerce you need a USDOT number. You also need an MC number if you haul regulated freight for hire across state lines. Some private or exempt operations need only the USDOT number.
Can I operate before my authority is active?
No. Hauling regulated freight for hire before your MC authority is active — or without the required insurance and BOC-3 on file — exposes you to fines and out-of-service orders.