Restraint of Trade after an Employee Resigns

Restraint of Trade after an Employee Resigns in South African Law

A Restraint of Trade after an Employee Resigns is a contractual restriction that continues after termination of employment and limits specified competitive conduct by the former employee for an agreed period, geographical area or field of activity.

A restraint may, for example, prevent a former employee from joining a direct competitor, soliciting particular customers, approaching suppliers, recruiting former colleagues or using confidential information acquired during employment.

South African law does not start from the proposition that restraints of trade are automatically invalid.

Since Magna Alloys & Research (SA) (Pty) Ltd v Ellis, the established position has been that a restraint is generally enforceable unless enforcement would be unreasonable and contrary to public policy. The party resisting enforcement ordinarily bears the burden of establishing unreasonableness.

That does not mean every restraint appearing in an employment contract will be enforced.

The employer must have a legitimate proprietary interest deserving protection. South African law principally recognises confidential information or trade secrets and customer or trade connections as protectable interests. An employer is not entitled to restrain an employee merely to prevent competition or to retain a skilled person in the marketplace.

The enquiry also takes place against section 22 of the Constitution, which protects every citizen’s freedom to choose a trade, occupation or profession. The courts therefore balance the principle that freely concluded agreements should ordinarily be honoured against the public interest in allowing people to remain economically productive.

For an employee who resigns to join a competitor, the crucial question is consequently not simply whether a restraint was signed. The real questions are whether the employer has something legally protectable, whether the employee’s proposed conduct threatens that interest, and whether the scope of the restraint is reasonable.

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How Restraint of Trade after an Employee Resigns Works

Resignation does not ordinarily cancel contractual obligations that were specifically intended to operate after termination.

A properly drafted restraint normally provides that it becomes operative when employment terminates, often “for any reason whatsoever”, and continues for a stated period thereafter.

If the employee resigns on 31 August and the contract contains a twelve-month post-employment restraint, the restriction may therefore operate until 31 August of the following year, subject to its enforceability.

The employee’s resignation does not itself determine reasonableness.

The restraint is assessed according to the factual position when enforcement is sought, including the employee’s former responsibilities, access to confidential information, relationships with customers, proposed new employment, geographical market and duration of the restriction. Reddy v Siemens Telecommunications confirms that reasonableness is a value judgment balancing enforcement of contractual promises with the former employee’s freedom to participate in economic activity.

The principle is even broader than resignation.

In Backsports (Pty) Ltd v Motlhanke, the Labour Appeal Court held in 2025 that the fact that the employee had been dismissed did not itself prevent enforcement. Relying on Reeves v Marfield Insurance Brokers, the LAC confirmed that where the restraint is framed to operate on termination, the underlying reason for termination will generally be irrelevant unless the contractual wording provides otherwise or exceptional bad-faith circumstances exist.

Accordingly, an employee who chooses to resign cannot ordinarily argue that the restraint disappeared merely because the employee initiated the termination.

The real dispute remains whether enforcement is reasonable.

The Legal Test for Enforcing a Restraint of Trade

The foundational modern authority is Magna Alloys, which rejected the older approach treating restraints as presumptively invalid. The restraint is enforceable unless the party resisting it establishes that enforcement would be unreasonable and contrary to public policy.

Basson v Chilwan developed the familiar structured enquiry.

A court considers whether the employer has an interest deserving protection after termination; whether that interest is threatened by the former employee; whether the employer’s interest, qualitatively and quantitatively assessed, outweighs the employee’s interest in remaining economically active; and whether another consideration of public policy requires enforcement or rejection of the restraint.

Later authority has added that the restraint’s duration, geographical reach and prohibited activities must also be considered as part of the proportionality enquiry. Reddy explains that enforcement involves balancing two competing public-policy considerations: contractual obligations should be honoured, but people should generally be free to participate in their chosen trade or profession.

This means that an employer cannot obtain an interdict merely by placing the employment contract before the court and saying that the employee agreed not to compete.

The employer must establish the contractual restraint and threatened or actual breach, and the evidence must identify a protectable proprietary interest.

The Labour Appeal Court emphasised this point again in Backsports: establishing a protectable interest is crucial to enforcement.

Similarly, in SGS South Africa (Pty) Ltd v Pillay, the Labour Court examined closely both the restraint covenant and the alleged confidential information and customer connections relied upon by the employer rather than treating the existence of a signed restraint as decisive.

Protectable Interests in Restraint of Trade after an Employee Resigns

An employer cannot restrain competition merely because competition is inconvenient.

There must ordinarily be a proprietary interest.

The two most commonly recognised categories are confidential information and customer or trade connections. Recent Labour Appeal Court authority continues to describe these as the principal forms of proprietary interest relevant to post-employment restraints.

Confidential information concerns commercially useful information that is genuinely not public and that could provide a competitor with an unfair commercial advantage.

Trade connections concern goodwill developed through relationships with customers, potential customers, suppliers or other commercial connections.

The enquiry is role-specific.

A payroll administrator who has never interacted with customers may have extensive access to employee information but no meaningful customer connection.

A senior salesperson may have little knowledge of manufacturing technology but possess exceptionally strong relationships with the employer’s largest customers.

A technical director may possess commercially sensitive product-development knowledge but have almost no client contact.

The restraint should correspond to the particular interest requiring protection.

An employer that seeks to restrain every former employee merely because all employees sign the same template clause risks being unable to demonstrate why the specific individual’s post-employment conduct threatens a legitimate proprietary asset.

Confidential Information and Trade Secrets

Confidential information is one of the strongest bases for enforcing a post-employment restraint, but not everything learned at work belongs permanently to the employer.

South African law distinguishes proprietary information from an employee’s own general skill, knowledge and experience.

In Automotive Tooling Systems (Pty) Ltd v Wilkens, the Supreme Court of Appeal emphasised that the dividing line between an employee’s personal skill and experience and the employer’s confidential information can be difficult, but an employee cannot ordinarily be prevented from using knowledge and abilities that have become part of that employee’s own professional competence.

An engineer cannot be required to forget engineering.

A salesperson cannot be required to forget how to negotiate.

A manager cannot be restrained merely because the former employer improved that person’s management ability.

What may legitimately be protected includes information such as non-public pricing structures, profit margins, confidential tender strategies, customer purchasing patterns, supplier rebates, technical processes, product-development plans, source material, strategic forecasts, proprietary databases and other commercially sensitive material, depending upon the employer’s actual business.

The information should also retain commercial significance.

Information that was confidential five years ago but is now obsolete may have little restraint value.

Likewise, information freely available from the employer’s website, customers or public tender records ordinarily cannot become a trade secret simply because the employment agreement labels all company information confidential.

In Reddy, the employee possessed knowledge concerning Siemens’ systems and technology and intended to join a direct competitor. The SCA enforced the restraint and recognised that the employer did not have to wait until actual disclosure had occurred where the circumstances created the very competitive risk the restraint had been designed to prevent.

This “risk of disclosure” principle is important.

An employer frequently cannot prove what information exists inside a former employee’s mind or precisely what will be said during a competitor’s internal meeting.

That is one reason restraints are sometimes used alongside confidentiality undertakings.

Recent authority continues to recognise this principle. In TWK Agri (Pty) Ltd v De Lange, the Labour Court referred to the employer’s entitlement to protect itself against the practically difficult-to-police danger that a former employee will communicate trade secrets or exploit customer connections after entering a competitor’s business.

Customer Connections and Restraint of Trade after an Employee Resigns

Customer relationships can constitute valuable goodwill.

The classic South African authority is Rawlins v Caravantruck.

The Appellate Division explained that a protectable customer connection arises where an employee has access to customers and is able to build a relationship sufficiently strong that, upon leaving, the employee could potentially induce those customers to follow to the new business.

The enquiry does not turn simply on possession of a customer list.

Many industries have publicly identifiable customers.

The real issue is the strength and nature of the relationship developed through employment.

A senior account manager who has spent six years personally servicing twenty major clients may possess a materially different trade connection from a back-office employee who has merely seen those clients’ names on invoices.

Relevant evidence can include how frequently the employee dealt with customers, whether the employee negotiated prices, whether customers relied personally on that employee, whether the employee controlled accounts, whether the employee entertained or advised clients, and whether the employee had influence over purchasing decisions.

The 2025 Labour Appeal Court decision in Backsports illustrates the point. The former employee approached customers of his previous employer and participated in services for one of those customers. The LAC held that the employer had established the relevant trade connections and breach and enforced the restraint for the remaining period.

Recent Labour Court decisions likewise continue to focus closely on actual customer relationships rather than generic allegations of competition. In SGS South Africa v Pillay, the court considered both customer connections and confidential information in assessing a proposed move to a competitor.

An employer should therefore identify the relationships actually threatened.

A founding affidavit saying merely that “the employee knew all our clients” will ordinarily be far less persuasive than evidence describing the clients, the employee’s role and the influence built through employment.

Duration, Geography and Restricted Activities

Reasonableness is also affected by the width of the restraint.

A twelve-month restraint limited to customers with whom the employee actually dealt may be significantly easier to justify than a five-year prohibition on working anywhere in South Africa in any remotely related industry.

The court considers duration, territory and the activities prohibited as part of the broader reasonableness enquiry. Reddy itself involved a restraint limited geographically to Gauteng even though Siemens conducted business more widely, illustrating the importance of matching the restriction to the commercial interest.

Geography should correspond with the employer’s market.

Where a salesperson handled Gauteng customers only, a worldwide restraint may require substantial justification.

For digital businesses, geography can be more complicated because customers and competitors may operate nationally or internationally without meaningful territorial boundaries. In such cases, restricting identified customers, sectors or activities may sometimes reflect the commercial risk more accurately than a conventional radius.

Duration should similarly correspond with how long the protected interest remains commercially valuable.

Highly confidential pricing information may lose value after the next annual pricing cycle.

A major customer relationship may remain commercially significant for much longer.

Technology may become obsolete quickly.

The clause should be designed around those realities.

Courts can, depending upon the wording and circumstances, enforce restraint obligations to a more limited extent rather than necessarily treating every dispute as an all-or-nothing question. Current cases continue to examine whether the relief actually sought is proportionate to the proprietary interest established.

An employer should therefore formulate its court relief carefully.

Seeking a narrower order genuinely necessary to protect particular clients or information may be legally and commercially stronger than attempting to remove the former employee entirely from an industry.

What Happens to a Restraint of Trade after an Employee Resigns to Join a Competitor?

Joining a competitor does not automatically establish an enforceable restraint case.

The employer must identify what is threatened by the move.

If the employee possesses material confidential information relating directly to the competitor’s business, Reddy demonstrates why employment by the competitor itself may create sufficient risk to justify restraint.

If the employee has significant customer connections, joining a competitor in a role involving those same customers may similarly threaten goodwill protected by the restraint.

But if the employee possesses no confidential information, had no material client relationships and is simply using general experience and skill, Automotive Tooling Systems demonstrates why the former employer cannot claim a proprietary interest merely in the employee’s competence.

The employee’s new position therefore matters.

A former chief commercial officer joining the largest competitor as chief commercial officer creates one type of risk.

The same person joining a non-competing charity in an unrelated operational role creates another.

Employers should obtain reliable information before commencing litigation.

The identity of the new employer, job title, responsibilities, overlapping products, customers and territory can be highly significant.

Likewise, the employee should disclose enough information to address genuine restraint concerns where appropriate rather than relying solely on an assertion that “I will not use confidential information”.

The employer is generally not required to accept an untestable assurance where the circumstances objectively create the precise competitive risk contemplated by a reasonable restraint.

Resignation, Dismissal and the Reason Employment Ended

Although this article focuses on resignation, the broader rule concerning termination is useful.

A restraint drafted to operate after employment ends will ordinarily not depend upon whether termination occurred through resignation, retrenchment or dismissal unless the contract itself creates such a distinction.

The Labour Appeal Court’s recent Backsports judgment is authoritative on this issue.

The Labour Court had initially reasoned that enforcing the restraint against an employee whom the employer itself had dismissed would be unjust. The LAC reversed that approach, holding that it conflicted with the binding authority in Reeves v Marfield. Where the restraint operates from the “Termination Date” or when the employee “ceases to be employed”, the reason employment ended is ordinarily irrelevant.

Reeves recognised an important exception where the employer’s conduct itself involves fraud or bad faith of the type contemplated by the judgment—for example, hiring and then dismissing somebody for the very purpose of imposing the restraint. The LAC reiterated that qualification in Backsports.

For an employee who resigns voluntarily, this means the ordinary restraint analysis applies directly.

Resignation does not make the restraint stronger or weaker merely because the employee chose to leave.

The employer must still establish the legitimate proprietary interest and threatened breach, while the employee may still establish that the restriction is unreasonable.

Urgent Enforcement, Evidence and Labour Court Procedure

Restraint disputes are frequently urgent because time itself can destroy the value of the remedy.

If a restraint lasts six months but litigation takes nine months, a final order may become commercially pointless.

Employers therefore commonly seek urgent interdictory relief shortly before or after the employee joins a competitor.

The Labour Court has concurrent jurisdiction with the civil courts over matters concerning contracts of employment under section 77(3) of the Basic Conditions of Employment Act 75 of 1997, which is the jurisdictional basis commonly used for employment-related restraint applications.

The Labour Court Rules introduced in 2024 contain a specific procedural regime for restraint-of-trade applications. The rules came into operation on 17 July 2024, and modern restraint decisions such as SGS South Africa v Pillay discuss the specialised affidavit procedure applicable to these cases.

Urgency should nevertheless be created by the facts, not by employer delay.

If the employer knew three months before resignation that the employee intended to join the competitor but did nothing, an urgent application brought only after the employee begins work may encounter avoidable procedural difficulties.

Evidence should be preserved immediately.

Relevant material may include the employment contract, restraint agreement, resignation letter, job description, customer portfolio, CRM data, access permissions, confidentiality policies, evidence of downloads or transfers, communications with clients, approaches to colleagues, details concerning the competing employer and correspondence requesting undertakings.

Employers should be specific about confidential information.

General assertions that an employee “knows everything about our business” are less useful than identifying particular pricing models, customer strategies, technical information or commercially sensitive records and explaining why those materials remain confidential and valuable.

Similarly, employers relying upon customer connections should identify the customers and explain the employee’s relationship with them.

The recent 2026 decision in Nuvest Chemicals (Pty) Ltd v Meyer illustrates the continuing importance of proportionality and proof. The Labour Court refused broad enforcement where the necessary protectable interest for the wider restraint had not been established, while maintaining narrower confidentiality and non-solicitation protection.

Defending a Restraint of Trade after an Employee Resigns

An employee should not assume the restraint is unenforceable merely because somebody has said that “restraints are unconstitutional”.

That is not South African law.

Section 22 of the Constitution is relevant to public policy, but the appellate courts continue to enforce reasonable restraint agreements.

A proper defence should engage with the specific proprietary interest and scope.

The employee may show that the alleged confidential information is public, obsolete or never accessible to the employee.

The employee may show that customer relationships belonged to other account managers and that the employee never exercised influence over purchasing decisions.

The new employer’s business may not actually compete with the former employer in the relevant market.

The employee’s new responsibilities may avoid the protected customers or products entirely.

The restraint’s duration or geographical scope may substantially exceed what is reasonably necessary.

The employer may also have framed the restraint merely to prevent ordinary competition.

Automotive Tooling Systems is particularly important where the dispute concerns general expertise. An employer does not acquire ownership of an employee’s personal skills, know-how and experience simply because those abilities were developed during employment.

Employees should also be cautious about electronic conduct shortly before resignation.

Forwarding customer databases, pricing schedules or sensitive documents to personal email accounts can fundamentally alter the evidential position in a later restraint dispute.

Even where the employee says the information was transferred merely to “finish work at home”, the conduct can strengthen an employer’s argument that confidential information is at risk.

Likewise, approaching customers or employees before the resignation date can create both restraint and continuing-employment-duty issues.

The preferable course is to obtain advice before commencing the competing activity rather than after urgent proceedings have already been served.

Conclusion: Restraint of Trade after an Employee Resigns

A Restraint of Trade after an Employee Resigns is neither automatically enforceable nor automatically invalid.

South African law begins with the principle established in Magna Alloys that restraint agreements are generally enforceable unless enforcement would be unreasonable and contrary to public policy.

Basson v Chilwan provides the core structured enquiry, while Reddy v Siemens explains the balance between pacta sunt servanda and the individual’s freedom to remain economically active.

The employer must have a legitimate proprietary interest.

The most important recognised interests are confidential information and customer or trade connections. Rawlins establishes the customer-connection principles, while Automotive Tooling Systems draws the critical distinction between an employer’s proprietary material and skills or experience that belong to the employee personally.

Resignation itself does not neutralise the restraint.

Indeed, the Labour Appeal Court’s 2025 decision in Backsports confirms the broader proposition that the restraint may remain operative even where employment ended through dismissal, provided the contractual wording and ordinary enforceability requirements support that result.

For employers, successful enforcement depends heavily on evidence.

The employer should identify the interest, explain why it is proprietary, establish the former employee’s access or influence, demonstrate the competitive threat and seek relief proportionate to the risk.

For employees, the strongest response is equally evidence-driven.

The enquiry should focus on what information is genuinely confidential, what customer relationships actually exist, what the new job entails and whether the restraint extends further than reasonably necessary.

A restraint is not designed to protect an employer from competition itself.

It protects legitimate proprietary assets from unfair exploitation after employment ends.

Is a Restraint of Trade after an Employee Resigns Automatically Enforceable?

No.

South African law generally regards restraint agreements as enforceable, but a restraint will not be enforced where enforcement is unreasonable and contrary to public policy.

The Basson and Reddy principles require consideration of the employer’s protectable interest, the threat to that interest and the impact of the restraint upon the former employee.

Is a Restraint of Trade Automatically Invalid in South Africa?

No.

That proposition has been incorrect since Magna Alloys & Research v Ellis.

The Appellate Division held that restraints are not presumptively invalid; the party resisting enforcement generally bears the burden of establishing unreasonableness.

Can My Employer Stop Me From Joining a Competitor?

Potentially.

The employer must ordinarily establish a legitimate proprietary interest and show that the proposed employment threatens that interest.

Where the employee possesses important confidential information and immediately joins a direct competitor, Reddy v Siemens demonstrates that a restraint may be enforced without the employer waiting for actual misuse to occur.

What Interests Can an Employer Protect With a Restraint?

The two principal categories are confidential information or trade secrets and customer or trade connections.

The Labour Appeal Court recently reaffirmed these categories in Backsports.

An employer generally cannot restrain ordinary competition merely because it prefers not to lose a skilled employee.

Are My Skills and Experience Confidential Information?

Not ordinarily.

Automotive Tooling Systems v Wilkens confirms that employees are generally entitled to use their own skill, knowledge and experience after employment ends.

The difficulty lies in distinguishing general expertise from genuinely proprietary trade secrets or confidential business information.

Can Customer Relationships Be Protected?

Yes.

Rawlins v Caravantruck recognises customer connections as protectable where the employee developed sufficient influence over customers that the employee could potentially take that goodwill to a competing enterprise.

Merely knowing customers’ names is not necessarily enough.

Does Resigning Make the Restraint Invalid?

No.

If the restraint is drafted to operate after termination of employment, resignation ordinarily triggers rather than destroys the post-employment obligation.

The underlying question remains whether enforcement is reasonable.

The recent Backsports decision confirms even more broadly that the reason for termination will generally not affect enforceability where the contractual wording makes the restraint applicable once employment ends.

What If I Was Dismissed Instead of Resigning?

A restraint can still be enforceable.

In Backsports v Motlhanke, the Labour Appeal Court overturned a Labour Court finding that dismissal deprived the employer of its right to enforce the restraint. The LAC applied Reeves and held that the reason employment terminated was irrelevant under the wording before it.

Exceptional fraud or bad faith by the employer may produce a different result.

How Long Can a Restraint of Trade Last?

There is no universal permissible duration.

Reasonableness depends on the protected interest and circumstances.

A six- or twelve-month restraint may be reasonable in one industry and excessive in another.

Courts consider duration together with territory, prohibited activities and the commercial lifespan of the proprietary interest.

Can a Restraint Cover the Whole of South Africa?

Potentially, where the employer’s protectable business interest genuinely operates nationally and the restriction is proportionate.

A national restriction is more difficult to justify where the employee worked only in one narrow locality or had no access to the employer’s wider market.

Geographical scope forms part of the reasonableness enquiry.

Does the Employer Have to Prove I Used Confidential Information?

Not necessarily.

Where the restraint legitimately protects confidential information and the employee’s move to a competitor creates a real risk of its disclosure or use, the employer does not necessarily have to wait until the information has actually been disclosed.

Reddy is the leading authority illustrating this principle.

Can My Employer Stop Me From Contacting Former Customers?

Potentially.

Where the employer possesses protectable customer connections and the restraint contains a reasonable non-solicitation obligation, a court may prohibit solicitation.

The employer should establish the nature of the relationships rather than merely assert that the persons appear on its customer database.

Where Does an Employer Bring a Restraint Application?

Depending on the circumstances and contractual basis, proceedings may be brought in the Labour Court or a civil court with jurisdiction.

Section 77(3) of the BCEA gives the Labour Court concurrent jurisdiction with civil courts concerning matters arising from contracts of employment, and restraint applications are routinely adjudicated there.

Are Restraint Applications Urgent?

They frequently are.

Because restraints operate for limited periods, delayed relief can become ineffective before ordinary litigation is completed.

The current Labour Court Rules contain specific procedures dealing with restraint-of-trade applications and have applied since 17 July 2024.

What Should an Employee Do Before Accepting a Competitor’s Job?

The employee should obtain and review the signed restraint and confidentiality provisions before accepting the position.

The proposed employer, role, customers, territory and overlap with the former employer’s business should then be compared with the contractual restriction and actual proprietary interests.

Waiting until an urgent court application is filed generally makes the dispute more expensive and commercially disruptive.

What Should an Employer Do When a Restrained Employee Resigns?

The employer should review the restraint immediately, identify the employee’s actual confidential information and trade connections, determine the intended destination and preserve relevant electronic and documentary evidence.

If genuine risk exists, the employer should seek appropriate undertakings promptly and consider urgent proceedings before avoidable delay undermines the effectiveness of the remedy.

References

Useful Links

Southern African Legal Information Institute provides free access to South African restraint-of-trade judgments, including Magna Alloys, Basson, Reddy, Automotive Tooling Systems, Rawlins and modern Labour Court decisions.

Department of Justice – Labour Court Rules provides access to the current procedural rules governing Labour Court proceedings, including the rules relevant to restraint-of-trade applications.

Department of Justice – Constitution, Chapter 2 provides the official text of the Bill of Rights, including section 22 protecting freedom of trade, occupation and profession.

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