South Dakota relies on common law principles to evaluate non-compete agreements. The state does not have a specific statute governing most non-competes, which means courts apply a general reasonableness test based on the specific facts of each case.
South Dakota's Non-Compete Standard
South Dakota courts evaluate non-compete agreements under a reasonableness standard. To be enforceable, a non-compete must:
- Protect a legitimate employer business interest
- Be reasonable in duration
- Be reasonable in geographic scope
- Be reasonable in the scope of restricted activities
- Be supported by adequate consideration
- Not impose undue hardship on the employee
Legitimate Business Interests in South Dakota
South Dakota courts recognize several legitimate business interests that can support a non-compete:
- Trade secrets and confidential proprietary information
- Established customer relationships developed at the employer's expense
- Specialized training that provides a meaningful competitive advantage
⚠️ General industry knowledge and ordinary business skills are not sufficient to justify a non-compete in South Dakota. Courts require a specific showing of what legitimate interest the employer is protecting — not merely a general desire to prevent competition from former employees.
Reasonable Duration and Geography
South Dakota courts have generally viewed restrictions of 1-2 years as potentially reasonable. Longer restrictions face greater scrutiny. Geographic restrictions must correspond to where the employer actually operates and where you had meaningful customer contact. A restriction that covers areas far beyond where you actually worked is likely to be viewed as unreasonable.
South Dakota's Blue Pencil Rule
South Dakota courts can modify an overbroad non-compete rather than voiding it entirely. Courts can reduce the duration, narrow the geographic scope, or limit the restricted activities and then enforce the modified version. This means that even a poorly drafted agreement may be partially enforced against you.
✅ South Dakota courts consider the totality of the circumstances when evaluating non-competes — including your specific role, what information you actually had access to, and the realistic competitive harm to the employer. Lower-level employees without meaningful access to trade secrets or important customer relationships have stronger arguments against enforcement.
Consideration in South Dakota
South Dakota requires adequate consideration for a non-compete to be enforceable. Employment at hire is the strongest form of consideration. Mid-employment non-competes should be supported by additional benefit beyond merely continuing employment, such as a raise, promotion, or new access to confidential information.