When Employees or Breakaway Shareholders Take Your Clients: The Legal Risks of Unlawful Competition in South African Business

Rui Marto

It often unfolds without warning. A trusted senior manager resigns, citing a new opportunity. Within days, key staff begin handing in their notices. Shortly thereafter, long-standing clients start cancelling contracts or quietly shifting their business elsewhere. What initially appears to be an unfortunate coincidence soon reveals a more troubling pattern: a coordinated breakaway, with a competing business already in operation and actively targeting the very relationships built within the original company.

In the South African commercial landscape, this scenario is not uncommon. The legal question that arises is whether such conduct amounts to legitimate competition or crosses the line into unlawful competition.

South African law recognises and protects the right to compete. Employees are entitled to use their skills, experience, and knowledge in new ventures, and businesses cannot prevent ordinary competition simply because it is inconvenient or harmful. However, that right is not absolute.

The courts have consistently drawn a clear distinction between fair competition and conduct that improperly exploits a company’s proprietary interests. Where an individual leverages confidential information, appropriates client connections, or undermines the business from within, the conduct may amount to unlawful competition. In these circumstances, the law will intervene to protect the business.

The position becomes significantly more serious where the individual involved is a shareholder, director, or part of senior management. These individuals are not merely bound by contract—they are subject to fiduciary duties.

Those duties require them to act in good faith, in the best interests of the company, and to avoid any conflict between personal interests and those of the business. If, while still engaged in their role, they prepare a competing enterprise, divert opportunities, or solicit clients for their own benefit, this may constitute a breach of fiduciary duty.

South African courts are increasingly treating such conduct as more than just aggressive competition. It is viewed as a serious governance failure, often attracting decisive legal consequences, including interdicts and claims for damages.

In the case of employees, the enforceability of protection largely depends on what has been agreed in writing. Properly drafted restraint of trade and confidentiality clauses remain among the most effective tools available to businesses seeking to protect themselves.

These provisions are designed to safeguard legitimate business interests, including client relationships, trade secrets, and workforce stability. While courts will not enforce restraints that are overly broad or unreasonable, they will uphold them where they are proportionate and necessary.

Where such protections are absent, businesses may find themselves exposed, with limited recourse against employees who move on and compete.

Timing is often decisive in breakaway situations. By the time clients have been lost and staff have transitioned to a competing entity, the commercial damage may already be substantial.

The law does provide remedies, including urgent interdicts to prevent further solicitation of clients or staff, orders restraining the use of confidential information, and claims for damages. However, these remedies are most effective when pursued without delay.

A slow response can weaken both the legal position and the practical ability to protect what remains of the business.

These disputes frequently reveal underlying vulnerabilities within businesses. There is often an over-reliance on key individuals, insufficient control over sensitive information, and a lack of formalised protections in contracts and internal systems.

In industries such as property and development—where relationships are central to securing and maintaining business—these weaknesses can be particularly damaging. Clients tend to follow individuals they trust, and without proper legal and structural safeguards, those relationships can be difficult to retain.

The most effective protection lies in preparation rather than reaction. Businesses should ensure that their employment and shareholder agreements are robust, with clearly defined confidentiality obligations and enforceable restraint provisions. Access to critical client and pricing information should be controlled and monitored, and internal governance processes should be formalised.

Equally important is the need to embed client relationships within the business itself, rather than allowing them to rest solely with one individual. A well-structured organisation is far more resilient when key personnel depart.

From a commercial law perspective, breakaway scenarios are among the most disruptive—and preventable—risks facing businesses in South Africa. The legal principles are well established, and the courts are increasingly prepared to enforce them where necessary.

The reality is that employees, shareholders, and partners will inevitably move on. The critical question is whether, when they do, they take your clients and business with them—or leave behind a structure strong enough to endure.