The South Carolina International Registration Plan (IRP) allows commercial motor carriers to operate across multiple states and Canadian provinces using a single apportioned license plate and registration. This agreement simplifies interstate travel, reduces administrative work, and ensures carriers pay the correct registration fees to each jurisdiction they operate in.
In South Carolina, the IRP program is administered by the Department of Motor Vehicles (SCDMV) Motor Carrier Services. Any motor carrier with qualifying vehicles that operate in two or more jurisdictions must register with South Carolina as their base state to obtain apportioned plates and remain in compliance with interstate trucking regulations.
Vehicle Eligibility for SC Apportioned Plates
Under SCDMV guidelines, you must obtain apportioned registration if your vehicle meets one of the following criteria:
- Has a gross vehicle weight (GVW) over 26,000 pounds
- Has three or more axles, regardless of weight
- Operates as part of a combination (truck and trailer) with a combined GVW over 26,000 pounds
This registration is critical for interstate hauling, as it ensures proper registration fee distribution among the states and provinces where your vehicle operates.
Documents for Your South Carolina IRP Application
Before you begin your IRP registration in South Carolina, you must prepare the proper documentation. This includes proof of a South Carolina business presence with a physical address, a valid vehicle title or lease agreement, and an active USDOT number. You must also provide proof of insurance that meets federal and state minimum coverage requirements. For heavier vehicles weighing 55,000 pounds or more, the Heavy Vehicle Use Tax (HVUT) Form 2290 is also required as part of the application process.
How to Apply for South Carolina Apportioned Plates
The first step in obtaining apportioned plates through the South Carolina IRP is to create a new account with SCDMV Motor Carrier Services. Once your account is established, you must submit all required forms and documentation outlined in the official IRP checklist.
While renewal applications can often be completed online through the Motor Carrier Services portal, initial applications may require direct submission by mail or in person. After your application is processed and approved, you will be issued your apportioned plate and a document called cab card, which lists every jurisdiction where your vehicle is authorized to operate.
SC IRP Fees and Annual Renewal Requirements
IRP fees in South Carolina are calculated based on the registered weight of the vehicle, the number of jurisdictions traveled in, and the total mileage accrued in each jurisdiction.
IRP registration must be renewed annually, and the SCDMV typically sends renewal reminders 30 to 45 days before expiration. Failure to renew on time can result in penalties ranging from ten dollars for short delays to seventy-five dollars for renewals more than ninety days late. To avoid downtime and compliance issues, carriers should make IRP renewal a priority.
Late registration incurs penalties:
| Days Late | Penalty Amount |
| 1-14 | $10 |
| 15-30 | $25 |
| 31-90 | $50 |
| 90 | $75 |
Maintaining IRP Compliance in South Carolina
Once registered, South Carolina IRP carriers must maintain accurate trip and mileage records for each vehicle in their fleet. These records must be stored for three to five years and be accessible for inspection in accordance with IRP audit requirements. Non-compliance, including incomplete or inaccurate mileage reporting, can lead to additional fees, penalties, or suspension of apportioned plates.
Let Us Handle Your IRP Registration
Registering and maintaining compliance with the South Carolina IRP can be complicated and time-consuming. Our professional IRP services handle every step for you, from preparing documentation and submitting applications to ensuring renewals are processed on time. By working with us, you can be confident that your apportioned plates meet all SCDMV requirements, keeping your fleet legal and on the road without delays.
Contact us today at (888) 202-4927 to streamline your IRP registration in South Carolina and focus on growing your trucking business.
