Are Restraint of Trade Clauses Enforceable in South Africa?

The Starting Point: Restraints Are Presumed Valid

Many people assume a restraint of trade clause is automatically unenforceable because it restricts their constitutional right to work. That is not how South African law approaches it. Since the Appellate Division's decision in Magna Alloys and Research (SA) (Pty) Ltd v Ellis in 1984, the default position has been that a restraint of trade agreement is valid and enforceable unless the person trying to escape it can show that enforcing it would be unreasonable and therefore contrary to public policy. In practice, this means the burden sits with the employee, not the employer, once the employer shows there is a signed restraint and a breach of it. That surprises a lot of people who assume the odds favour them simply because the clause feels unfair.

How Courts Decide What Is Reasonable

The leading case on how reasonableness is tested is Basson v Chilwan, decided by the Appellate Division in 1993. Courts weigh up a few linked questions. Does the employer have an interest that genuinely deserves protection once the employment relationship ends, such as trade connections, confidential information, or trade secrets? Is that interest actually being threatened by what the former employee is now doing? If so, how does the value of protecting that interest compare with the former employee's interest in being economically active and earning a living in their field? And finally, is there some broader public interest, unrelated to the two parties, that should tip the scales either way? None of these questions has a fixed numerical answer. A restraint that is reasonable for a senior sales executive with access to pricing strategy and client lists may be entirely unreasonable if applied word for word to a junior administrator.

What Actually Counts as a Protectable Interest

This is where a lot of restraint disputes are won or lost. An employer cannot rely on a restraint simply to avoid ordinary competition, because wanting one less competitor in the market is not, on its own, a protectable interest recognised by our courts. What does qualify is something closer to trade connections built up through the employee's role, confidential business information such as pricing models, supplier terms, or strategic plans, and genuine trade secrets. If your role gave you little or no exposure to that kind of information, or if the information you did have has since become outdated or public knowledge, that is a strong argument that the restraint no longer protects anything real.

Can a Restraint Be Challenged or Narrowed After You Have Signed It?

Yes, and this is often misunderstood. Signing the contract does not close the door. An employee can still argue that the geographic area covered is too wide, that the duration is longer than necessary to neutralise the risk, or that the scope of prohibited activity goes far beyond the work they actually did. South African courts also have the power to enforce a restraint only partially, cutting down an overreaching clause to what is reasonable rather than striking it out entirely, an approach often referred to informally as the blue pencil rule. On the other side, employers who want to act quickly, for example when a departing employee joins a direct competitor within days, typically approach the High Court for an urgent interdict rather than waiting for a lengthy trial, which is why early legal advice matters as soon as a dispute like this arises.

Before You Sign, Resign, or Try to Enforce One

If you are an employer drafting a restraint, tying it clearly to a specific, identifiable interest and keeping the duration and geographic scope proportionate will make it far more likely to survive a challenge than a generic clause copied from a template. If you are an employee facing one, get advice before you resign, not after your new employer has already received a letter of demand, since your options narrow considerably once a dispute is already underway.

Restraint of trade disputes move quickly and often turn on facts specific to your role and industry, so generic advice only goes so far. If you are weighing up a restraint clause, whether as the employer who wants it to hold up or the employee who wants to know where you stand, our employment contracts team can look at the actual wording and your circumstances and give you a clear view of the risks before you make a costly decision.