Home › States › South Carolina

Trucking filing deadlines for South Carolina carriers

If you run an interstate trucking company based in South Carolina, these are the recurring federal filings to track. Enter your USDOT number to see your own dates.

South Carolina by the numbers

• 10,880 active interstate USDOT records with a South Carolina address.
• 1,717 were added in the last 12 months. Those carriers are in, or close to, their New Entrant Safety Audit window.
• 1,268 have an MCS-150 more than 26 months old on file (see all states).

Source: FMCSA Company Census File, refreshed daily. The public file can lag FMCSA's live records.

Recurring federal filings

• MCS-150 biennial update: every two years, month set by your USDOT number (table). Free in Motus.
• UCR: annual registration for interstate carriers (guide).
• IFTA: quarterly fuel tax returns, filed with your base jurisdiction, which for a South Carolina-based carrier is generally South Carolina (due dates).
• IRP: apportioned plates renewed through your base jurisdiction (guide).
• IRS Form 2290: heavy vehicle use tax, due August 31 for most trucks (guide).

South Carolina may also have its own intrastate rules, weight-distance or permit requirements. Check with the state's motor vehicle or transportation agency.

New South Carolina carrier?

Start with the free first-year checklist and the New Entrant Safety Audit checklist.

Last reviewed October 16, 2026. DOT Due Dates is an independent private service. It is not affiliated with, endorsed by, or operated by FMCSA, the U.S. Department of Transportation, the IRS, the UCR Plan, IFTA, Inc., or any state agency. Information is for general reminders only and is not legal or tax advice. Always confirm requirements and due dates with the agency. We do not file anything for you, and all of these filings can be done directly with the agencies.