What is a set-off agreement?
Is set-off valid and enforceable in South Africa, and what are its requirements?
“The four conditions for set-off to operate are that both debts must be: (a) of the same nature; (b) liquidated; (c) fully due; and (d) payable by and to the same persons.”
“If two persons have entered into a transaction the result whereof is a set-off, wholly or in part, of debts which they owe one another and the estate of one of them is sequestrated within a period of six months after the taking place of the set-off … the trustee of the sequestrated estate may … abide by the set-off or he may, if the set-off was not effected in the ordinary course of business, with the approval of the Master disregard it and call upon the person concerned to pay to the estate the debt which he would owe it but for the set-off.”
When you need a Set-Off
- You enter a supply, distribution or services arrangement where each party will invoice the other, and you want certainty about whether the two running accounts net against each other — or whether each must be paid in full and disputed separately.
- You are a lender, lessor or supplier who wants payment “free of any deduction, withholding or set-off”, so that a customer cannot withhold instalments by alleging a counter-claim — this requires an express exclusion of set-off in the contract.
- You operate within a group of companies or a banking relationship and want a cross-claim or multi-account netting arrangement that goes beyond the strict common-law requirement that the debts be between the same two persons in the same capacity.
- You are settling reciprocal claims, closing out a facility, or unwinding a relationship and want to record exactly how the offsetting balances are calculated, what residual amount is payable, and by when.
What a Set-Off should contain
Statement of the set-off right (confirm, extend or exclude)
The core decision: does the agreement confirm the common-law right, broaden it, or take it away? A confirming clause records that mutual, liquidated, due debts net off automatically. An extending clause allows set-off of claims that would not otherwise qualify (unliquidated, contingent or future amounts). An exclusion clause — “the customer shall pay in full without deduction, withholding or set-off” — is common in finance and lease documents and must be expressed clearly because it overrides a default common-law right.
Scope: which debts and accounts may be set off
Define exactly which obligations fall within the netting — a single running account, all amounts under this agreement, or all present and future debts of any nature between the parties. Where group or multi-account set-off is intended, identify the relevant entities and accounts, because the common-law rule normally requires the debts to be owed between the same two persons in the same capacity.
Liquidation and ascertainment mechanism
Set-off at common law needs liquidated debts. Where the clause extends to unliquidated or disputed claims, build in a mechanism to fix the amount — for example a certificate of indebtedness, an expert determination, or a contractual right to estimate in good faith — so the netting figure is determinable rather than left in dispute.
Trigger and timing of netting
State when set-off occurs: continuously and automatically as reciprocal debts arise, only on a stated trigger (default, termination, insolvency notice), or only on written notice by the electing party. The timing matters because it determines the net amount owing at any given moment and who must take a step to bring it about.
Currency conversion and close-out netting
For cross-border or financial arrangements, specify the currency of account, the conversion rate and date used to bring claims to a common currency, and a close-out mechanism that crystallises all outstanding obligations into a single net sum on an event of default. This is what makes the netting commercially predictable.
Insolvency and business-rescue carve-outs
Acknowledge that set-off against an insolvent estate is restricted by section 46 of the Insolvency Act and the concursus creditorum, and that contractual extensions of set-off may not bind a liquidator. For business rescue, deal expressly with the section 133 moratorium under the Companies Act — set-off against a claim the company itself brings is generally permitted, but the clause should not over-promise.
No-set-off / pay-in-full undertaking and certificate of balance
Where the party receiving payment wants protection, include an undertaking to pay in full without set-off plus a certificate-of-balance clause making a signed statement of the amount owing prima facie proof. This pairs the exclusion of set-off with an easy means of proving the debt if the other side withholds payment.
Interaction with the National Credit Act
Where any party is a consumer under a credit agreement, record that statutory set-off (deducting from a consumer’s account) requires the consumer’s prior written authorisation in the prescribed form under sections 90(2)(n) and 124 of the National Credit Act, so the clause does not purport to authorise self-help set-off the Act prohibits.
Set-off vs acknowledgement of debt in South African law
| Feature | Set-off agreement | Acknowledgement of debt |
|---|---|---|
| Purpose | Cancels reciprocal debts against each other (netting) | Records and admits that one party owes the other a debt |
| Direction of obligation | Two-way — each party owes the other | One-way — only the debtor owes the creditor |
| Underlying source | Common-law right (compensatio); contract confirms, extends or excludes it | Pure contract / written admission of liability |
| Effect when it operates | Extinguishes both debts pro tanto, leaving a net balance | Creates or confirms a fresh, enforceable obligation to pay |
| Key requirement | Debts mutual, liquidated, due and of the same kind | A clear admission of indebtedness and amount |
| Typical use | Running accounts, facilities, close-out netting, no-set-off clauses | Settlements, deferred-payment arrangements, securing an admitted debt |
Common South African pitfalls
- Assuming set-off applies to an unliquidated or disputed counter-claim. Common-law set-off needs a liquidated debt — a fixed or readily provable amount. A customer who withholds payment because of an unquantified damages claim is usually not exercising valid set-off, and may itself fall into default; if you want to net unliquidated claims, the contract must say so and provide a way to fix the amount.
- Relying on automatic set-off against a party in liquidation. Section 46 of the Insolvency Act and the concursus creditorum restrict set-off against an insolvent estate, and in Emontic the SCA refused set-off because the two debts were not payable by and to the same persons. A netting clause that ignores insolvency may not bind a liquidator.
- Treating consumer-account set-off as a free self-help remedy. For credit agreements under the National Credit Act, a credit provider cannot simply deduct from a consumer’s account; sections 90(2)(n) and 124 require the consumer’s prior written authorisation in the prescribed form. A clause purporting to authorise unilateral set-off against a consumer may be unenforceable.
- Failing to exclude set-off when you need payment in full. If your finance, lease or supply contract is silent, the common-law right of set-off applies and a customer can lawfully net a cross-claim against what it owes you. To prevent that, the contract must expressly require payment “without deduction or set-off”.
- Overlooking that the debts must be mutual and in the same capacity. Set-off does not work where one debt is owed by a person in their personal capacity and the other to them as trustee, agent or in some other capacity — the “same persons in the same capacity” requirement is strict, and drafting a group netting clause needs care to bring the right entities into the net.
Frequently asked questions
What is set-off (compensatio) in South African law?
Set-off, or compensatio, is the principle that where two parties each owe the other money, the debts cancel each other out to the extent that they overlap, leaving only the net balance payable. It is a rule of South African common law and operates wherever the debts are mutual, liquidated and fully due, even without a written agreement.
What are the requirements for set-off in South Africa?
The Supreme Court of Appeal confirmed in Emontic Investments v Bothomley [2024] ZASCA 1 that both debts must be: (a) of the same nature (usually money for money); (b) liquidated; (c) fully due and enforceable; and (d) payable by and to the same persons in the same capacity. If any condition is missing, common-law set-off does not operate.
Does set-off happen automatically or must I claim it?
The weight of South African authority is that set-off operates automatically, by operation of law, the moment two reciprocal debts that meet the requirements co-exist. A party who “raises” set-off is asserting that the debts have already been extinguished pro tanto, rather than exercising a fresh election — though it is always prudent to record it in writing.
Can a contract exclude set-off in South Africa?
Yes. Because set-off operates between the parties, a contract may validly exclude it — typically with a clause requiring payment “in full, without deduction, withholding or set-off”. These clauses are common in finance, lease and supply agreements and are enforced, so a customer who has agreed to one cannot lawfully net a cross-claim against the amount due.
Does set-off apply if the other party is in liquidation or business rescue?
It is restricted. Section 46 of the Insolvency Act 24 of 1936 limits set-off against an insolvent estate, and on liquidation the concursus creditorum and the “same persons” requirement apply — in Emontic the SCA refused set-off on that basis. In business rescue, section 133 of the Companies Act generally still allows set-off against a claim the company itself brings.
Can a bank set off money in my account against a loan I owe?
Not freely, for consumer credit. Under sections 90(2)(n) and 124 of the National Credit Act 34 of 2005 — confirmed in National Credit Regulator v Standard Bank [2019] ZAGPJHC 182 — a credit provider may not apply set-off against funds in a consumer’s account without the consumer’s prior written authorisation in the prescribed form. The old practice of automatic bank set-off no longer applies to NCA credit agreements.
Can I set off an unliquidated damages claim against money I owe?
Generally no. Common-law set-off requires a liquidated debt — a fixed or readily provable amount. An unquantified damages or breach claim is not liquidated, so withholding payment on that basis usually does not amount to valid set-off and may itself put you in default, unless your contract expressly extends set-off to such claims and provides a way to fix the amount.
What is the difference between set-off and an acknowledgement of debt?
Set-off cancels two reciprocal debts against each other, leaving a net balance — it is a two-way netting of obligations. An acknowledgement of debt is a one-way written admission that you owe a specific amount, used to record or secure a debt. They serve opposite functions and are often used in different documents.
Sources & authority
- Emontic Investments (Pty) Ltd v Bothomley NO and Others (1123/2022) [2024] ZASCA 1; 2025 (2) SA 66 (SCA)
- Insolvency Act 24 of 1936, s 46 (Set-off)
This guide is general information, not legal advice. It reflects the law as at June 2026.