Fast Trucking ComplianceStart intakeMCS-150 Update in South Carolina
The MCS-150 is FMCSA's biennial check-in form for every USDOT holder — fleet size, driver count, operational mileage, and safety contact information.
Direct answer
Every South Carolina carrier with a USDOT number must update Form MCS-150 every 24 months under 49 CFR §390.19. FMCSA assigns the due-month from the carrier's USDOT last two digits. Missing the deadline is the leading cause of authority deactivation among South Carolina carriers. FastMCS150Filing handles the update same-day for $75.
Filing price
$75 service fee
South Carolina carriers
8,600+
IFTA base
South Carolina
FMCSA region
FMCSA Southern Service Center
What MCS-150 reports and why South Carolina carriers can't skip it
Form MCS-150 (Combined Motor Carrier Identification Report) is the biennial census FMCSA collects from every USDOT holder. It captures total power units, total drivers, operational mileage, cargo classifications, principal place of business, and safety contact information. The data feeds CSA scoring, the New Entrant Safety Audit triggers, and FMCSA's compliance-review prioritization.
For South Carolina carriers, missing the MCS-150 deadline is the #1 cause of authority deactivation. South Carolina is anchored by the Port of Charleston (one of the fastest-growing East Coast container ports) and the Inland Port at Greer that connects via rail to the port — extending the port's effective reach across the Southeast. When MCS-150 lapses past the due month, FMCSA flags the USDOT as "INACTIVE" in SAFER. The carrier can still operate in the short term, but compliance reviews trigger automatic findings and brokers querying SAFER pre-load see the inactive flag.
South Carolina-specific scheduling and timing
MCS-150 due-month is determined by the last two digits of the carrier USDOT. For example: USDOTs ending in 01 are due in January; 25 in May; 73 in November (the formula is documented at FMCSA.dot.gov/registration). Carriers filing at the spokes typically receive a due-month reminder pulled from FMCSA SAFER as part of intake.
South Carolina-based 8,600+ carriers cycle through MCS-150 updates every two years. The filing window opens 6 months before the due month and stays open until end of due-month. Missing the deadline doesn't void the USDOT immediately — but FMCSA's automated revocation pipeline kicks in at roughly 90 days past due, and FMCSA Southern Service Center (Atlanta, GA) can initiate compliance reviews on lapsed carriers earlier than that if the carrier shows up on weigh-station enforcement logs.
Filing modalities — DIY vs FastMCS150Filing
FMCSA accepts MCS-150 updates through the URS portal at no charge. The form runs about 4 pages on screen and takes 15–25 minutes for a carrier comfortable with FMCSA terminology (cargo classification, hazmat designation, drug/alcohol consortium status). Owner-operators completing it themselves typically self-file.
FastMCS150Filing handles the update for $75 — which makes sense for fleets that prefer not to chase the due month, want to delegate the data accuracy verification (especially around mileage and driver count, which feed CSA scoring), or have multi-USDOT operations where coordinating multiple due-month cycles is logistically painful. We pull current data from FMCSA SAFER, walk the carrier through the form's required fields, submit, and confirm acceptance.
What South Carolina weigh stations and audits check
MCS-150 currency is a top-line check during South Carolina commercial vehicle inspections. Inspectors querying SAFER see the carrier's USDOT status (ACTIVE / INACTIVE / OUT OF SERVICE) and the date of last MCS-150. Lapsed MCS-150 doesn't trigger automatic OOS at every state — but it does flag the carrier for closer review and shows up on the inspection report as a notation that follows the carrier.
New-Entrant Safety Audits at the 12-month mark pull MCS-150 data to verify reported fleet and driver counts match drug-testing records, IFTA filings, and insurance documents. South Carolina carriers with mismatched MCS-150 data face audit findings even if their core operation is otherwise compliant — keeping MCS-150 current within the 24-month window protects the audit posture.
What makes South Carolina different
South Carolina is anchored by the Port of Charleston (one of the fastest-growing East Coast container ports) and the Inland Port at Greer that connects via rail to the port — extending the port's effective reach across the Southeast. South Carolina State Transport Police run weigh stations on I-85, I-95, and I-26. The I-85 corridor through Greenville-Spartanburg is one of the busiest commercial truck routes in the Southeast.
File your MCS-150 Update
MCS-150 Update for South Carolina carriers — $75 service fee
Every 24 months on a schedule keyed to the last two digits of the carrier USDOT. 100% acceptance guarantee. No hidden fees.
Running MCS-150 Update in South Carolina? You probably also need BOC-3 Filing in South Carolina. A BOC-3 designates a process agent in every US state so the FMCSA has a local point for service of legal process on your operating authority.
Other filings South Carolina carriers need
BOC-3 Filing
$75 flat (lifetime)
A BOC-3 designates a process agent in every US state so the FMCSA has a local point for service of legal process on your operating authority.
USDOT & MC Authority
From $299 (plus FMCSA $300 filing fee)
A USDOT number is the FMCSA safety identifier every commercial motor vehicle operator needs; MC operating authority is the for-hire interstate license that lets you legally haul freight for compensation.
UCR Registration
From $46 (Bracket A, 1–2 power units, 2026 schedule)
UCR is the annual federal fee that every interstate motor carrier, broker, and freight forwarder pays through their base state to fund safety and economic enforcement programs.
Form 2290 (HVUT)
From $149
Form 2290 is the federal Heavy Vehicle Use Tax (HVUT) return for trucks 55,000 lbs taxable gross weight or higher. Filing produces the stamped Schedule 1 — proof of payment that state DMVs require for truck registration renewal.
State Trucking Permits
Varies by program (NY HUT $19+, KY KYU quarterly, NM WDT, OR weight-mile, CT HUF)
State trucking permits cover any state-specific authorization, weight-distance tax, or commercial surcharge that stacks on top of federal UCR, MCS-150, and Form 2290 — required when operating commercial vehicles on a particular state's highways.
Driver Screening
From $39 (MVR-only); full pre-hire pack from $89
Driver screening combines the Motor Vehicle Record (MVR), CDLIS query, Pre-Employment Screening Program (PSP) report, and FMCSA Clearinghouse query — the four federally-required pre-hire checks for any commercial driver position.
Authority Reinstatement
$275 flat
Authority reinstatement reactivates a previously-revoked or inactive MC operating authority — required when FMCSA has revoked authority due to lapsed insurance, missed MCS-150, unpaid civil penalty, or out-of-service safety violations.
MCS-150 Update in neighboring states
Looking at South Carolina compliance more broadly? See the full South Carolina compliance guide.
Common questions, plainly answered.
FMCSA assigns the due month from your USDOT's last two digits. The window opens 6 months before due and closes end of due month. FastMCS150Filing pulls your due date from SAFER on intake — no need to memorize the formula.
Skip the calculator. File now.
The same compliance team that built this tool can file every requirement on your behalf — same-day or next-business-day depending on the form.
All services by Fast Trucking Compliance — Cryp Solutions LLC