Why It Matters
A flaw in South Dakota’s vehicle title and registration system has resulted in incorrect tax charges affecting hundreds of transactions, raising questions about the accuracy of revenue collection and the Department of Revenue’s oversight of a critical financial system.
What Happened
South Dakota’s 605Drive vehicle title and registration system, which launched in February 2025, charged incorrect tax amounts in some transactions due to errors in trade-in values transferred from the prior system. An audit of the system identified systematic problems that resulted in both overpayments and underpayments to the state.
Auditors tested 112 transactions out of 750,005 total transactions processed between July 2024 and June 2025. Three of the tested transactions resulted in tax overpayments totaling $1,400. The Department of Revenue then conducted a broader internal review of all transactions and identified 604 impacted by data transfer errors when moving information from the previous system.
That review found nine errors resulting in approximately $1,450 in refunds that have been processed or are actively being processed. The Department also identified 24 errors where taxpayers collectively owed $4,200, and the agency said it is seeking payment for these undercharged transactions. An additional 56 documentation errors were discovered with no financial impact.
By the Numbers
February 2025 — launch date of the 605Drive system
750,005 — total transactions reviewed by the Department
604 — transactions impacted by data transfer errors
$1,450 — refunds issued from nine identified errors
$4,200 — collective amount owed by taxpayers in 24 undercharge cases
Zoom Out
The 605Drive errors are not the first financial missteps by South Dakota’s Department of Revenue. A prior audit found the Department had collected approximately $530,000 in commercial vehicle fee overcharges affecting more than 11,000 South Dakota vehicles. Additionally, a deceased former Department employee allegedly created 13 fake vehicle titles to secure $400,000 in loans, and two former employees were convicted of creating fake titles or failing to report knowledge of the fraud.
The pattern of errors and misconduct underscores broader challenges with system implementation and internal controls at state revenue agencies nationwide, particularly when legacy systems are replaced with new digital platforms.
What’s Next
The Department of Revenue is processing refunds for overpayments and pursuing payment from taxpayers who were undercharged. The scope of errors identified—604 transactions out of over 750,000—suggests the review process will continue as the agency reconciles its records and works to prevent similar issues in future transactions.