Non-Compete Agreement South Africa: Restraint of Trade Under SA Law

Non-compete agreements in South Africa are called restraints of trade. They operate differently from their counterparts in most common-law jurisdictions. In South Africa, a restraint of trade is presumed valid and enforceable unless the employee can prove it is contrary to public policy. This shifts the burden of proof onto the restrained party — a significant practical difference from jurisdictions where the employer must justify the restraint.

Understanding the SA approach to restraints is essential for employers drafting employment contracts and for employees assessing whether they are bound by a clause that limits their next job.

The Magna Alloys Test: The Foundation of SA Restraint Law

The Supreme Court of Appeal's decision in Magna Alloys and Research (SA) (Pty) Ltd v Ellis 1984 (4) SA 874 (A) established the framework still used today. The court held that:

1. A restraint of trade is valid and binding unless it is unreasonable
2. A restraint is unreasonable if it is contrary to public policy — specifically if it violates the public interest in freedom of trade or the right to work
3. The test balances two competing interests: the employer's legitimate interest in protecting confidential information and client relationships vs. the employee's right to earn a living using their skills

The Constitutional Court in Barkhuizen v Napier 2007 confirmed that constitutional values (dignity, freedom) must inform the public-policy analysis. An unreasonable restraint infringes the right to dignity and freedom of occupation.

What Is a "Protectable Interest"?

A restraint is only enforceable if the employer can demonstrate a legitimate protectable interest that the restraint is designed to protect. The two categories of protectable interests recognised in SA law are:

1. Trade Secrets and Confidential Information

Proprietary technical knowledge, formulas, processes, pricing strategies, and commercially sensitive information that the employer has developed and that is not in the public domain. The employer must show that the information is genuinely confidential — information that is well-known in the industry does not qualify.

2. Customer and Supplier Relationships

If an employee has developed personal relationships with the employer's clients and those relationships give the employee the ability to take those clients with them when they leave, the employer has a protectable interest in preventing them from doing so. This protectable interest is strongest for:

• Senior sales staff with exclusive client relationships
• Account managers in professional services (law, accounting, recruitment)
• Technical staff who are the client's primary point of contact

An employee who never had client-facing duties cannot be restrained on the basis of client relationships they never developed.

Factors Courts Consider in Assessing Reasonableness

Even where a protectable interest exists, the restraint must be reasonable in scope. SA courts examine:

Duration

How long does the restraint last? Six months to two years is common. Five years is generally considered excessive for a non-senior employee. No fixed rule exists — the reasonableness depends on the specific role and the protectable interest.

Geographic Area

The restraint must be limited to the area where the employer actually competes and where the restrained employee actually worked. A national restraint for a regional sales manager is likely unreasonable. A restraint limited to a specific city or province is more defensible.

Scope of Activities Restricted

The restraint should be limited to activities that actually threaten the employer's protectable interest. A blanket prohibition on working in an entire industry is generally unreasonable. A prohibition on working for direct competitors in the same product category is more likely to be enforced.

Consideration Given for the Restraint

Was the employee paid separately for agreeing to the restraint? The answer is not determinative in SA law, but courts do consider whether the restraint was obtained without any meaningful benefit to the employee beyond continued employment.

Change of Circumstances After Signing

Courts will assess the reasonableness of a restraint at the time of enforcement, not just at the time of signing. If circumstances have changed materially — for example, the employer's business has fundamentally changed, the employee was retrenched involuntarily, or the employer breached the employment contract — those factors influence whether enforcement is just.

An employee who was dismissed for operational reasons (retrenchment) has a stronger argument against enforcement of a restraint than an employee who resigned voluntarily.

Practical Steps for Employers Drafting a Restraint

1. Identify the specific protectable interest — be clear about whether you are protecting trade secrets, client relationships, or both
2. Limit duration and geography to what is genuinely necessary for that protectable interest
3. Use tiered restraints — senior executives may warrant a 24-month national restraint; junior staff may only warrant a 6-month regional restraint
4. Consider payment — some employers pay a "garden leave" salary during the restraint period, which significantly strengthens enforceability
5. Include a specific trade secrets clause separately — this protects you even if the restraint is found unreasonable, because the duty of confidentiality is independent of the restraint

Enforcing a Restraint: Urgent Interdict in the High Court

If an ex-employee breaches a restraint by joining a competitor or poaching clients, the typical enforcement mechanism is an urgent application to the High Court for an interdict — a court order prohibiting the breach. Urgent interdicts in restraint matters are common in SA.

The applicant (former employer) must show:

• A clear right (a valid, enforceable restraint)
• An apprehension of irreparable harm (loss of clients or disclosure of trade secrets that cannot be adequately compensated in damages)
• The balance of convenience favours granting the interdict

For Employees: How to Challenge a Restraint

If you believe your restraint is unreasonable:

• Challenge it at the time of enforcement, not at the time of signing (it is too late to challenge before you leave)
• Obtain legal advice — the burden is on you to prove unreasonableness
• Consider applying to the High Court for a declaratory order that the restraint is unenforceable before joining the competitor
• Gather evidence of any change in circumstances since signing (e.g., employer misconduct, retrenchment, fundamental change in your role)

Related Guidance

• Explore related guides: Blog hub
• Use our free tools: Free Tools

Official References

• Magna Alloys and Research (SA) (Pty) Ltd v Ellis 1984 (4) SA 874 (A)
• Department of Employment and Labour - www.labour.gov.za
• CCMA - www.ccma.org.za

Last Reviewed

Last reviewed: 2026-03-03. This article is informational only - verify requirements with official sources before acting.