South Dakota Independent Contractor vs. Employee Classification: A Guide for Businesses

Handing a worker a federal 1099 form instead of a W-2 in Sioux Falls, Rapid City, or Aberdeen does not automatically make that individual an independent contractor under state law. A single workplace injury claim or a terminated worker filing for state reemployment benefits can trigger an immediate cross-agency investigation, exposing a company to years of retroactive payroll taxes, statutory interest, and uninsured workers' compensation liabilities.

Unlike states that rely on a three-part ABC test, South Dakota enforces a specialized statutory two-prong test alongside federal Internal Revenue Service (IRS) and Department of Labor (DOL) standards. Navigating independent contractor vs. employee classification in South Dakota requires aligning written subcontractor agreements with actual daily operations across both state and federal frameworks.

Federal IRS vs. South Dakota Classification Standards

South Dakota businesses must satisfy three separate regulatory bodies when classifying workers: the state Reemployment Assistance Division, the state Workers' Compensation Division, and the federal government. Under S.D. Codified Laws § 61-1-11 (governing unemployment insurance, known locally as Reemployment Assistance) and S.D. Codified Laws § 62-1-3 (governing workers' compensation), every individual performing services for remuneration is presumed to be an employee unless the hiring business proves two mandatory prongs:

• Prong 1 (Freedom from Control): The individual has been and will continue to be free from control or direction over the performance of the services, both under the contract of service and in actual fact.
• Prong 2 (Independently Established Trade): The individual is customarily engaged in an independently established trade, occupation, profession, or business.

In Appeal of Hendrickson's Health Care Service, 462 N.W.2d 655 (SD Supreme Court 1990), the court held that failing to prove either of these two statutory elements results in mandatory employee classification. Furthermore, in Egemo v. Flores, 470 N.W.2d 817 (SD Supreme Court 1991) and Davis v. Frizzell, 504 N.W.2d 330 (SD Supreme Court 1993), the court emphasized that a signed independent contractor contract is not dispositive if the hiring party exercises daily operational control or if the worker lacks an independent business enterprise.

At the federal level, the IRS evaluates worker status using the Common Law Three-Factor Test (Behavioral Control, Financial Control, and Type of Relationship), while the U.S. Department of Labor applies the Economic Realities Test under the Fair Labor Standards Act, 29 U.S.C. § 203 to determine whether a worker is economically dependent on the employer.

Industry-Specific Classification Rules in South Dakota

Trucking Companies and Owner-Operators

Motor carriers operating along I-90 and I-29 face unique statutory rules for lease-operators and independent drivers. Under S.D. Codified Laws § 62-1-10 and S.D. Codified Laws § 62-1-11, an owner-operator of a licensed truck, road tractor, or truck tractor is recognized as an independent contractor for workers' compensation purposes only if the driver and carrier obtain an official Certificate of Independent Contractor Status from the state. To qualify, the parties must document six statutory factors, including that the driver owns or leases the rig, pays for fuel and maintenance, supplies any relief personnel, is paid by load or tariff percentage rather than hourly wages, and operates under a written independent contractor contract. Under S.D. Codified Laws § 62-1-12, once approved, the certificate must be physically kept inside the vehicle cab. Under S.D. Codified Laws § 62-1-13, a certified owner-operator may also elect to participate in the workers' compensation system as a sole proprietor or pay premiums under the carrier's policy without forfeiting independent contractor status.

Construction Firms and Subcontractors

General contractors in fast-growing markets like Sioux Falls, Rapid City, and Brookings frequently hire specialized framing, drywall, and electrical subcontractors. Under S.D. Codified Laws § 62-1-19, an independent subcontractor who is a sole proprietor with no employees may execute a formal Affidavit of Exempt Status for workers' compensation. While this signed affidavit creates a rebuttable presumption that the subcontractor is not an employee of the general contractor, state auditors looking at Reemployment Assistance taxes still require proof of Prong 2: the subcontractor must hold a South Dakota contractor's excise tax license, carry independent commercial general liability insurance, provide their own heavy tools, and actively bid on jobs for multiple builders.

IT Consultants and Software Developers

Technology companies and financial institutions in South Dakota often engage remote software engineers, cybersecurity auditors, and cloud architects. To satisfy S.D. Codified Laws § 61-1-11, an IT consultant cannot simply be a former W-2 programmer performing the exact same daily coding sprints under a project manager's supervision. The consultant should operate through a registered business entity (such as an LLC), invoice by milestone or project deliverable, maintain a state sales tax license for gross receipts, and retain the right to serve other commercial clients simultaneously.

Seasonal Agricultural Workers and Custom Harvesters

Agriculture remains a cornerstone of the South Dakota economy, with distinct statutory carve-outs. For Reemployment Assistance taxes, S.D. Codified Laws § 61-1-17 exempts agricultural labor unless the farm or ranch operator pays $20,000 or more in cash wages during any calendar quarter or employs 10 or more individuals during 20 different calendar weeks. For workers' compensation, S.D. Codified Laws § 62-3-15 generally exempts farm and ranch laborers, except that S.D. Codified Laws § 62-3-16 strictly mandates workers' compensation insurance for crews operating commercial threshing machines, grain combines, corn shellers, or hay balers for profit. Custom harvesting crews and seasonal agronomy contractors must be carefully vetted under these commercial machinery rules.

Step-by-Step Process in South Dakota to Audit and Defend Worker Classification

Step 1: Verify Independent Business Documentation

Before onboarding a contractor in Minnehaha County, Pennington County, or Brown County, collect documentary proof satisfying Prong 2 of S.D. Codified Laws § 61-1-11. Require a completed IRS W-9, a certificate of good standing from the Secretary of State if the contractor is an LLC or corporation, a copy of their South Dakota sales or excise tax license, and a certificate of commercial liability or workers' compensation insurance.

Step 2: Execute Industry-Specific Statutory Forms

For commercial trucking operations, complete and submit the South Dakota, Department of Labor and Regulation, Independent Contractor Verification Application (alongside the carrier's South Dakota, Department of Labor and Regulation, Trucking Company Verification Application) so the state issues the binding cab certificate within 30 days. For construction trades, have solo subcontractors execute the statutory Affidavit of Exempt Status pursuant to S.D. Codified Laws § 62-1-19 prior to stepping onto the jobsite. If federal tax status is ambiguous, either party may request an official determination using Form SS-8, FED, IRS, Determination of Worker Status for Purposes of Federal Employment Taxes and Income Tax Withholding.

Step 3: Respond to a Reemployment Assistance Tax Audit

If a former worker files for unemployment benefits and lists your business as an employer, the South Dakota Department of Labor and Regulation, Reemployment Assistance Division, Aberdeen (located at 420 S. Roosevelt Street, Aberdeen, SD, phone 605-626-2452) will initiate a status investigation. You must provide copies of contracts, invoices, 1099-NEC filings, and evidence demonstrating that the worker advertised services to the general public and controlled their own workflow.

Step 4: File a Timely Administrative Appeal

If an auditor reclassifies your contractors as employees and issues a Notice of Determination assessing back taxes, S.D. Codified Laws § 61-7-5 gives your business strictly 15 calendar days from the mailing date of the determination to submit a written appeal to the Appeals Section in Aberdeen. An Administrative Law Judge (ALJ) will conduct a formal evidentiary hearing. If the ALJ affirms the assessment, you have 15 days to petition the Secretary of Labor and Regulation under S.D. Codified Laws § 61-7-10 or 30 days to file a judicial appeal in a venue such as the Minnehaha County Circuit Court, Sioux Falls or the Pennington County Circuit Court, Rapid City under S.D. Codified Laws § 61-7-14.

How Much Does it Cost in South Dakota?

The financial exposure of a worker misclassification audit in South Dakota far exceeds the cost of proactive legal compliance:

• State Reemployment Assistance Back Taxes and Penalties: Employers are liable for unpaid state unemployment contributions ranging from 0% to 9.5% on the first $15,000 of wages paid to each misclassified worker per year, plus a $25 penalty per quarter for late wage reports under S.D. Codified Laws § 61-5-58 and statutory interest of 1.5% per month (18% annually) under S.D. Codified Laws § 61-5-57.
• Federal IRS Tax Penalties: When the IRS reclassifies workers who received a Form 1099-NEC, FED, IRS, Nonemployee Compensation, 26 U.S.C. § 3509 assesses the employer 1.5% of wages for uncollected federal income tax plus 20% of the employee's share of FICA (Social Security and Medicare) taxes, in addition to 100% of the employer's matching FICA share. If the employer failed to file 1099-NEC forms, those penalty rates double to 3% of wages and 40% of employee FICA.
• Workers' Compensation Exposure: Under S.D. Codified Laws § 62-3-11, an employer who fails to carry required workers' compensation insurance loses statutory tort immunity, allowing an injured worker to sue in circuit court for full civil damages, or claim double compensation benefits.
• Employment Attorney Fees: Hiring a South Dakota employment lawyer to draft compliant independent contractor agreements and audit classifications typically costs $1,200 to $3,500, whereas defending a multi-year DLR or IRS misclassification audit ranges from $5,000 to $20,000+ at hourly rates of $250 to $425 per hour.

How Long Does the Process Take?

Timelines vary depending on whether you are seeking proactive certification or contesting an active audit:

• Owner-Operator Certification: Under S.D. Codified Laws § 62-1-12, the South Dakota Department of Labor and Regulation, Pierre must approve or deny an owner-operator independent contractor certificate within 30 calendar days of receiving the application.
• Initial Audit Investigation: A state Reemployment Assistance tax status audit in Aberdeen typically takes 30 to 90 days from the initial records request to the issuance of a formal determination.
• Administrative Appeal Deadline: Employers have exactly 15 calendar days from the mailing date of a determination to file a written appeal (S.D. Codified Laws § 61-7-5). Telephone hearings before an Administrative Law Judge are generally scheduled within 3 to 6 weeks, with written decisions issued 15 to 30 days after the hearing.
• Circuit Court Review: Appealing a final agency decision to a South Dakota Circuit Court must be initiated within 30 days and typically takes 6 to 12 months for briefing and judicial resolution.

If your business is expanding its contractor workforce or responding to a state labor inquiry, you can browse our directory to connect with an experienced South Dakota employment and tax lawyer who can audit your contracts and represent you before state and federal agencies.

Frequently Asked Questions (FAQ)