Disclaimer: This is general industry guidance, not legal or compliance advice. Always confirm specifics with the FMCSA directly.
DOT Number — the safety registration
Who needs it: Almost every commercial carrier operating a vehicle over 10,000 lbs GVWR or carrying placardable hazmat, or operating interstate as a for-hire carrier.
Cost: Free to obtain.
How to get it: Apply at fmcsa.dot.gov via Unified Registration System (URS).
The DOT number is what FMCSA uses to track your safety record (inspections, crashes, audits).
MC Number — the operating authority
Who needs it: Carriers transporting regulated commodities for hire across state lines.
You typically don't need an MC if:
You only haul intrastate (within one state)
You haul exempt commodities only (unprocessed agricultural products in some cases)
You're a private carrier (only hauling your own company's goods)
You definitely need an MC if you're:
Picking up loads from brokers on a load board across state lines
Cost: ~$300 application fee (one-time).
Process: ~25-day publication period after FMCSA approves your application. You need active insurance filings (BMC-91 or BMC-91X) and process agent designation (BOC-3) before authority activates.
Insurance filings
To activate your MC authority you need:
BMC-91 or BMC-91X — your insurance carrier files this with FMCSA confirming your auto liability ($750K–$1M minimum for general freight).
BOC-3 — designates "process agents" in every state you operate in. Many third-party services file this for a small fee ($25–$50).
After authority activates
Order DOT and MC numbers for your truck (decals or magnets, both sides).
Make sure your insurance certificate (COI) is current and ready to send to every broker.
UCR registration — annual fee, varies by fleet size.
State-specific requirements — some states require additional intrastate registration.
What happens if you operate without authority?
Out-of-service orders
Civil penalties (often $10K+ per violation)
Personal and company liability if there's a crash without proper authority/insurance
Brokers won't load you (they check authority before tendering)
How brokers check you
Every broker runs your MC through FMCSA's SAFER and through services like Carrier411 or RMIS. They confirm:
Active authority (not revoked or suspended)
Insurance on file with proper limits
No high-severity safety scores
No recent fraud reports
If anything fails, you don't get the load. So keep your filings clean.
New carrier checklist
☐ DOT number
☐ MC authority application filed
☐ Insurance bound (auto liability $1M, cargo $100K+, general liability)
☐ BMC-91/91X filed by insurer
☐ BOC-3 process agents designated
☐ UCR registration current
☐ Truck decals
☐ COI saved as PDF, ready to email brokers
☐ W-9 ready
☐ Bank account set up for ACH deposits
Once these are all done, you're ready to start booking loads on Load Work.