The MCS-150 is the Motor Carrier Identification Report — the FMCSA form every USDOT-registered carrier, broker, and freight forwarder files every 24 months to keep their federal record current. It is the single most common touchpoint between a motor carrier and the FMCSA, and it is the #1 reason USDOT numbers get deactivated when it is missed.
The Legal Foundation: 49 CFR Part 390
The MCS-150 filing requirement is set out in Title 49 of the Code of Federal Regulations, Part 390. That regulation requires every motor carrier, broker, and freight forwarder that holds a USDOT number to file an updated identification report at least once every 24 months, and sooner whenever specific facts about the business change — a new address, a change in fleet size, or a change in operation type.
The purpose is regulatory visibility. The FMCSA uses the data you report on MCS-150 to populate the SAFER system, calculate your CSA scores, triage new-entrant safety audits, and target enforcement. Out-of-date data distorts all of those downstream systems, which is why the FMCSA takes a missed MCS-150 seriously enough to deactivate your USDOT for it.
What Information MCS-150 Captures
MCS-150 is not a short form. The FMCSA uses it to refresh every field in your USDOT record:
- Legal business name and DBA — must match your FMCSA authority record exactly.
- Principal place of business and mailing address.
- Operation type — interstate, intrastate, or both.
- Cargo classifications — what you typically haul (general freight, refrigerated, household goods, liquids, etc.).
- Fleet size — broken out by straight trucks, truck tractors, and trailers, owned and leased counted separately.
- Driver count — split into drivers operating within 100 miles of base vs beyond 100 miles.
- Annual mileage — total vehicle miles traveled in the last calendar year.
- Hazmat status — whether you transport any hazardous materials.
- Safety contact — the designated safety employee or representative responsible for compliance.
Who Files MCS-150?
Every entity that holds a USDOT number files MCS-150 on the biennial schedule. That includes:
- Interstate motor carriers — for-hire and private, of any fleet size.
- Intrastate carriers registered through the FMCSA system — most states route their USDOT registrations through the FMCSA portal, which pulls the carrier into the MCS-150 cycle.
- Freight brokers (MC-B) — brokers hold USDOT numbers tied to their operating authority.
- Freight forwarders (MC-FF) — same rule as brokers.
For a quick yes/no walkthrough, see Do I need to file MCS-150?
How Often Do You File?
Every 24 months on a schedule set by the last two digits of your USDOT number — the last digit determines the month, and the second-to-last digit determines whether you file in even or odd years. A full walkthrough with the digit lookup lives in our MCS-150 filing schedule guide.
On top of the regular 24-month cycle, an out-of-cycle MCS-150 is required within 30 days whenever your business undergoes a material change — a move, a significant fleet addition or reduction, a change from intrastate to interstate operation, or a change in the legal entity name.
What Happens If You Skip It
A missed MCS-150 triggers a USDOT deactivation typically within 30-45 days of the deadline. Once deactivated, your record flips to INACTIVE on SAFER, load boards and brokers stop clearing your authority, and continuing to operate in interstate commerce exposes you to civil penalties under 49 CFR Part 390 that start at $1,000+ per day.
The fix is usually straightforward — file the overdue MCS-150 and the FMCSA reactivates the USDOT within 1-2 business days — but if the filing slips far enough, the FMCSA can move to revoke MC operating authority, which is a harder and more expensive repair. Details: MCS-150 deactivation and reinstatement.
File Your MCS-150 Before the Deadline
Flat $75. Submitted the same business day. SAFER updated within 1 business day.
File My MCS-150 NowMCS-150 vs Other FMCSA Filings
MCS-150 is often confused with three other FMCSA filings:
- USDOT registration — the one-time application that gets you a USDOT number. MCS-150 is the recurring update to that record.
- MC authority (OP-1) — the operating-authority application for for-hire carriers, brokers, and forwarders. Separate from MCS-150, but an entity with active MC authority will have both.
- BOC-3 — the process-agent designation required for interstate operating authority. Filed once and typically does not require updates unless your provider changes.
MCS-150 is the only one of those filings that operates on a recurring 24-month schedule, which is why it is the most common source of FMCSA deactivations.
Bottom line: MCS-150 is the every-24-months refresh that keeps your USDOT record accurate and your authority active. Missing it is the single most common reason USDOTs get deactivated, and the remedy is simply filing the update.