By Evan Reid, Founder of Haul Handbook · Updated Aug 5, 2026
South Carolina bases IFTA at the SCDMV rather than at a revenue department, which is unusual: the same Motor Carrier Services office in Blythewood handles the licence, the decals, the quarterly returns, and the audit. There is no charge for the decals. Returns are due the last day of the month after each quarter, and late filing costs $50 or 10 percent of the net tax due, whichever is greater.
South Carolina IFTA administration
- License fee
- SCDMV publishes no IFTA licence fee. The IFTA Licensing and Renewals page states only that no fee is charged for the IFTA decal, and neither that page nor the Motor Carrier Services Manual names a separate licence fee, so no amount is recorded rather than guessed.
- Decal fee
- $0 (SCDMV states directly that no fee is charged for the IFTA decal. SCDMV issues only the number of decal sets matching the number of vehicles on the equipment listing; extra decals for fleet additions are requested through the Motor Carrier Services portal.)
- Application
- Apply on SCDMV Form IFTA-1, Application for International Fuel Tax Agreement (IFTA) Credentials. New IFTA accounts can only be opened online through the SCDMV website with the required documentation; faxed applications are not accepted. A new account needs Form IFTA-1, Form MC-7 (Agreement to Prepare/Maintain Records), Form MC-26 (web entry access application), proof of insurance, and either a South Carolina driver's license with two proofs of residency or four proofs of an established place of business. Complete both sides of Form IFTA-1, sign it, state the number of vehicles beside the renewal box, and attach an equipment listing with year, make, model, VIN, carrier or owner name, and IRP account number where applicable; SCDMV issues only the number of decal sets matching that listing. A carrier with interstate operating authority gives its MC number and USDOT number, and a carrier leased to another company and running under that company's MC number registers as a carrier and gives the lessee's USDOT number. Renewals may be filed online through the Motor Carrier Services portal at https://www.scdmvonline.com/SCTRNS/Member/MCS/logon.aspx or mailed to the Blythewood office. A Power of Attorney (SCDMV Form MC-25) must be on file for anyone other than the account holder to conduct business on, or even ask about, an IFTA account. An incomplete application delays the licence and decals, and a carrier whose licence in a previous IFTA base state is revoked or suspended will not be issued a South Carolina licence until that is cleared with the previous base state.
- Filing frequency
- Quarterly. The IFTA return (SCDMV Form IFTA-3) is due on the last day of the month immediately following the close of the quarter, and a return must be filed even for a quarter with no travel and no fuel purchases.
- Base-jurisdiction rules
- Any person based in a member jurisdiction operating a qualified motor vehicle in two or more member jurisdictions may obtain an IFTA licence from that base jurisdiction. South Carolina qualifies an applicant either through residency, meaning a South Carolina driver's license plus two proofs of residency, or through an established place of business, meaning a physical structure inside the State that the applicant owns or leases, open for business and staffed during regular business hours, with staff employed for general management of trucking related business. The four proofs of an established place of business are South Carolina Articles of Incorporation registered to conduct business in South Carolina, a commercial lease agreement or deed, Form 941, and a business state or federal income tax return (1040C or 1120S); a carrier that cannot produce all four may apply through residency instead. A virtual office does not qualify, and SCDMV names a PO box, a rented address in shared office space, a flexible workplace, a mailbox store, and an internet-only company with remote employees as examples that fail. A qualified motor vehicle is one used, designed, or maintained to transport persons or property that has a gross or registered gross vehicle weight over 26,000 pounds, or three or more axles regardless of weight, or is used in combination when the combination weight exceeds 26,000 pounds; farm vehicles, special mobile equipment, and buses are covered if they meet those criteria and cross state lines. A carrier running under its own USDOT number and its own authority must have an IFTA account; a carrier leased on to another company under Form IRP-9 may let that company file its IFTA or open its own account, and taking its own account means taking on the record-keeping and quarterly filing. On a short-term rental of 29 days or less the lessee reports and pays the fuel-use tax unless the rental contract designates the lessor as responsible and the lessee holds a copy of the lessor's valid IFTA licence.
- Late-filing penalty
- The penalty is $50 or 10 percent of the net tax due, whichever is greater. It applies to failing to file, filing late, filing an amended return, or failing to pay the full amount owed, and amended returns take penalty and interest the same way late returns do.
- Penalty: interest
- An annual rate of 2 percent above the IRS underpayment rate. SCDMV's own worked example: if the IRS underpayment rate is 3 percent, the IFTA annual interest rate is 5 percent. Interest accrues monthly at one twelfth of the annual rate.
- Penalty: failure to file
- When a licensee fails, neglects, or refuses to file, SCDMV may assess a penalty on the best information available, including the licensee's filing history, and the licensee owes estimated tax, penalty, and interest and carries the burden of proving the assessment wrong. Failing to file quarterly returns leads to suspension or revocation of the licence and decals.
More South Carolina IFTA rules
- Credentials: license
- One IFTA licence per licensee, valid for the calendar year January 1 to December 31. A copy stays in the cab of every qualified vehicle and the original is kept somewhere safe.
- Credentials: decals
- One decal on the exterior of the driver's side of the power unit and one on the exterior of the passenger's side. A decal held under a long-term lease is turned in when the lease ends. A dealer, manufacturer, drive-away, or transporter licensee displays the decals temporarily and visibly on both sides of the cab with a copy of the licence in the vehicle.
- Credentials: enforcement
- A carrier caught without an IFTA licence and decal may have to buy a trip permit and may be cited by law enforcement.
- Renewal
- The IFTA licence is renewed every year. A mail-in renewal must reach the Blythewood office by December 1 to guarantee the licence and decal arrive by December 31. The new year decal may be displayed from December 1, but a copy of the current year licence must stay in the qualified truck until the end of that year. IFTA tax returns and payments must be current through the third quarter before a renewal is processed, and an unpaid Unified Carrier Registration fee can delay an IFTA or IRP renewal or suspend the account.
- Grace period
- December 1 through December 31: the new year decal may be displayed while the current year licence is still carried.
- Refunds: detail
- A refund may be claimed on the return when tax was overpaid during a reporting period, and is issued for overpaid amounts of $5 or more. A refund may be denied if the licensee owes the department anything else. Tax-exempt fuel is refunded by the jurisdiction where the tax was paid, not by South Carolina.
- Recordkeeping
- A licensee keeps records for four years from the due date of the final quarterly tax report or the date the return was filed, whichever is later. Any jurisdiction may conduct a final audit when a licence is cancelled, and IFTA accounts can only be closed at the end of a quarter.
- Cancellation: detail
- A licence may be cancelled once the licensee satisfies all requirements and tax liabilities to all member jurisdictions and files a completed Form IFTA-3 indicating cancellation, or by writing cancel and the effective date on the renewal notice and mailing it to SCDMV. On cancellation the licence and any used decals are destroyed and unused decals go back to Motor Carrier Services.
- Contact: email
- [email protected]
- Qualified motor vehicle: definition
- A motor vehicle used, designed, or maintained for the transportation of persons or property that has a gross vehicle weight or registered gross vehicle weight of more than 26,000 pounds (11,797 kg), or has three or more axles regardless of weight, or is used in combination when the weight of the combination exceeds 26,000 pounds.
Quarterly filing deadlines
Returns are due on the same schedule every year. Missing one draws the late-filing penalty above.
Licensing rules, records, and penalties
Which vehicles the licence covers, how long it runs, what South Carolina can ask you to post or produce, and what a late or wrong return costs. Each one is sourced.
- Qualified motor vehicle: Definition
- A motor vehicle used, designed, or maintained for the transportation of persons or property that has a gross vehicle weight or registered gross vehicle weight of more than 26,000 pounds (11,797 kg), or has three or more axles regardless of weight, or is used in combination when the weight of the combination exceeds 26,000 pounds.
- Qualified motor vehicle: Note
- Farm vehicles, special mobile equipment, and buses are subject to IFTA licensing if they meet the gross vehicle weight or axle criteria and cross state lines.
- Credentials: License
- One IFTA licence per licensee, valid for the calendar year January 1 to December 31. A copy stays in the cab of every qualified vehicle and the original is kept somewhere safe.
- Credentials: Decals
- One decal on the exterior of the driver's side of the power unit and one on the exterior of the passenger's side. A decal held under a long-term lease is turned in when the lease ends. A dealer, manufacturer, drive-away, or transporter licensee displays the decals temporarily and visibly on both sides of the cab with a copy of the licence in the vehicle.
- Credentials: Enforcement
- A carrier caught without an IFTA licence and decal may have to buy a trip permit and may be cited by law enforcement.
- Renewal
- The IFTA licence is renewed every year. A mail-in renewal must reach the Blythewood office by December 1 to guarantee the licence and decal arrive by December 31. The new year decal may be displayed from December 1, but a copy of the current year licence must stay in the qualified truck until the end of that year. IFTA tax returns and payments must be current through the third quarter before a renewal is processed, and an unpaid Unified Carrier Registration fee can delay an IFTA or IRP renewal or suspend the account.
- Penalties: Interest
- An annual rate of 2 percent above the IRS underpayment rate. SCDMV's own worked example: if the IRS underpayment rate is 3 percent, the IFTA annual interest rate is 5 percent. Interest accrues monthly at one twelfth of the annual rate.
- Penalties: Failure to file
- When a licensee fails, neglects, or refuses to file, SCDMV may assess a penalty on the best information available, including the licensee's filing history, and the licensee owes estimated tax, penalty, and interest and carries the burden of proving the assessment wrong. Failing to file quarterly returns leads to suspension or revocation of the licence and decals.
- Penalties: Reinstatement
- A suspended licence is reinstated by filing and paying the late return online, at an MCS branch office, or by mail. A revoked licence is reinstated only at an MCS branch office or by mail.
Who licenses for IFTA in South Carolina
Any person based in a member jurisdiction operating a qualified motor vehicle in two or more member jurisdictions may take an IFTA licence from that base jurisdiction. Qualified is defined by weight or by axle count, so a three-axle truck is inside the definition regardless of what it weighs, and combinations are measured together.
South Carolina qualifies an applicant two ways: by residency, meaning a South Carolina driver's licence plus two proofs of residency, or by an established place of business, meaning a physical structure in the state that you own or lease, open and staffed during business hours, backed by four specific documents in the business name. SCDMV rules out a virtual office, a PO box, a rented address in shared office space, a flexible workplace, a mailbox store, and an internet-only company with remote employees by name.
Leasing changes who files. A carrier running under its own authority needs its own account, while a carrier leased on to another company may let that company file or open its own account and take on the record-keeping.
How to apply
The application is SCDMV Form IFTA-1, and new accounts can only be opened online with the required documentation; faxed applications are not accepted. Alongside the application you file an agreement to prepare and maintain records, a web entry access application, proof of insurance, and your residency or place of business proofs.
Complete both sides of the form, state the number of vehicles, and attach an equipment listing with year, make, model, VIN, carrier or owner name, and IRP account number where applicable. SCDMV issues only as many decal sets as there are vehicles on that listing, so a short listing means a second request later. Anyone other than the account holder needs a Power of Attorney on file before they can conduct business on the account, or even ask about it.
A carrier whose licence in a previous base state was revoked or suspended will not get a South Carolina licence until that is cleared with the previous state.
Filing cadence and penalties
Returns are quarterly on SCDMV Form IFTA-3, due the last day of the month immediately following the close of the quarter, and a return is required even for a quarter with no travel and no fuel purchases. The return has to be in a paid status or postmarked by the due date, and a due date falling on a weekend or legal holiday moves to the next business day.
Late filing costs a flat penalty or a share of the net tax due, whichever is greater, and the same penalty attaches to failing to file, filing an amended return, or paying short. Interest runs above the IRS underpayment rate and accrues monthly. Where a licensee simply does not file, SCDMV may assess on the best information available, including the filing history, and the licensee carries the burden of proving the assessment wrong.
The deadline table on this page lists all four quarters with their due dates.
Renewal, decals, and records
The licence runs the calendar year and is renewed annually. A mail-in renewal has to reach Blythewood by the start of December to guarantee the licence and decals arrive before the year ends, and the new year decal may be displayed from that same date while the current year licence stays in the cab. Returns and payments must be current through the third quarter before a renewal is processed, and an unpaid Unified Carrier Registration fee can hold up an IFTA or IRP renewal or suspend the account.
One decal goes on each exterior side of the power unit and a copy of the licence stays in the cab. A carrier caught without licence and decals may have to buy a trip permit and may be cited.
Records are kept four years from the due date of the final quarterly report or the date it was filed, whichever is later. Any jurisdiction may audit when a licence is cancelled, and accounts can only be closed at the end of a quarter.
What SCDMV does not publish
One fact stays unrecorded here because the source does not state it. SCDMV states directly that no fee is charged for the IFTA decal, but neither the IFTA licensing page nor the Motor Carrier Services Manual names a separate licence fee, so the licence fee field is marked unconfirmed with a note rather than converted into a zero. A published zero and an unpublished amount are different claims, and only one of them is on the page.
The per-jurisdiction tax rates are not South Carolina data at all. They are national, they change quarterly, and they render on this site from a shared rate store that SCDMV itself points carriers toward.
The tax rates live in the quarterly matrix
IFTA rates change every quarter, so we keep them in one refreshed store instead of copying them onto every state page. The current quarter is 3Q 2026. Use the IFTA rates by state table for the full matrix, or the IFTA calculator to run your miles and gallons against the current rates.
For the registration-to-return process in order, follow the South Carolina IFTA filing walkthrough.
What pairs with IFTA
IFTA and IRP travel together: the same interstate operation that needs a fuel tax license usually needs apportioned plates through South Carolina IRP. If you are still setting up, the full order of operations is in start a trucking company in South Carolina.
Frequently asked questions
Who administers IFTA in South Carolina?
- SCDMV Motor Carrier Services in Blythewood, which is unusual: most states put fuel tax at a revenue or taxation department. The licence, the decals, the quarterly returns, and the audit all belong to the same DMV office here.
What does a South Carolina IFTA licence cost?
- SCDMV states that no fee is charged for the decal. It names no separate licence fee anywhere we could read, so the licence fee field is recorded as unconfirmed with a note rather than as a zero. The costs that do attach to the programme are the quarterly tax itself and the late-filing penalty and interest.
How do I apply for a South Carolina IFTA licence?
- File SCDMV Form IFTA-1 online with the required documents; new accounts can only be opened online and faxed applications are not accepted. Attach an equipment listing, because SCDMV issues only as many decal sets as there are vehicles on it, and file a Power of Attorney if anyone else will handle the account.
When are South Carolina IFTA returns due?
- Quarterly, on the last day of the month following the close of each quarter, and a return is required even for a quarter with no travel or fuel purchases. Late or missing returns draw a penalty of a flat amount or a share of the net tax due, whichever is greater, plus interest. The deadline table on this page lists all four dates.
Do I need IFTA if I only run inside South Carolina?
- No. The licence exists for a carrier based here that runs qualified vehicles in two or more member jurisdictions. A truck that never leaves South Carolina has nothing for the licence to replace, and SCDMV points such a carrier at an intrastate plate instead.
Haul Handbook publishes educational information about trucking registration and compliance requirements. This is not legal, financial, or tax advice. Rules, fees, and deadlines change; confirm with the agency before you file or pay.