This guide is maintained as a current resource for September 2026 and covers only the laws of England and Wales. Information is for general guidance, not legal advice. Consult a qualified solicitor for advice specific to your situation.
Comprehensive guide to insolvency set‑off in England and Wales: explains how mutual debts between an insolvent company and a creditor are automatically netted in liquidation and administration, the requirements for mutual dealings, exceptions, and how only the balance is payable or provable in insolvency.
When a company in England and Wales enters insolvency - such as liquidation or administration - the law recognises that the company and its creditors may owe each other money. To ensure fairness and avoid unnecessary litigation, UK insolvency law provides a mechanism called insolvency set‑off. This principle allows mutual debts between an insolvent company and a creditor to be automatically set against each other, so that only the balance remains payable by one side or the other. Insolvency set‑off is mandatory and reflects the long‑standing principle that creditors should not recover twice when mutual obligations exist.
This article explains how insolvency set‑off works, when it applies, the requirements for mutual dealings, relevant exceptions and practical examples, helping directors, creditors, students and members of the public understand this essential aspect of UK insolvency law.
What Is Insolvency Set‑Off?
Insolvency set‑off is a statutory right that comes into effect automatically when a company enters an insolvency procedure where distributions are made - most commonly liquidation and, in certain circumstances, administration. Under this rule:
- Debts that the insolvent company owes to a creditor
and - Debts that the same creditor owes to the company
are combined and offset against each other.
Only the net balance, if any, is then claimed by the creditor or paid to the liquidator or administrator.
The legal basis for this principle is found in the Insolvency Rules and wider insolvency legislation, including Section 323 of the Insolvency Act 1986 for individuals and equivalent provisions applied to companies via the Insolvency Rules 2016.
How Insolvency Set‑Off Operates
Automatic and Mandatory Application
Once an insolvency procedure begins:
- In liquidation, set‑off applies automatically from the date the company is wound up.
- In administration, set‑off applies when the administrator gives notice of intention to make a distribution to creditors.
In both cases, the process is self‑executing and cannot be excluded by contract. This means parties cannot agree to opt out of insolvency set‑off in their commercial arrangements; the rule overrides such agreements.
What Counts as Mutual Dealings
For insolvency set‑off to apply, there must be mutual credits, mutual debts or other mutual dealings between the insolvent company and the creditor before insolvency:
- Mutual credits include situations where one party has allowed the other to defer payments.
- Mutual debts exist where each party owes a sum to the other.
- Other mutual dealings may include other reciprocal financial arrangements recognised as debt.
Importantly, the obligations must be between the same parties and in the same capacity (for example, as company and creditor, not as a personal guarantor on an unrelated contract).
What Set‑Off Covers
Insolvency set‑off can cover:
- Existing debts that were due before the insolvency;
- Contingent or future claims, if they can be quantified (for example, contractual damages that are ascertainable).
Once set‑off is applied, only the balance, if any, remains:
- If the company owes the creditor more than the creditor owes the company, the creditor can prove for the balance in the insolvency.
- If the creditor owes more to the company than the company owes to the creditor, the creditor must pay the net amount to the estate.
Mutuality Requirements and Exceptions
No Set‑Off After Notice of Insolvency
A key limitation is that debts arising after the company's insolvency or after notice of pending insolvency (for example, when a winding‑up petition has been presented or an administration has begun) are not included in the set‑off calculation. This prevents creditors from manipulating timing to gain an advantage.
No Set‑Off After Assignment
If a creditor's debt has been assigned after one of the critical insolvency dates (such as when a liquidator was appointed or a petition was pending), it cannot be used in set‑off. The rule ensures that third parties do not obtain priority by assignment after insolvency is known.
Same Capacity Rule
The obligations must have arisen in the same capacity on both sides. For example, if the creditor owes money in one capacity (such as personal debt) but is owed money by the company in another capacity (such as as trustee), set‑off may not apply.
When Insolvency Set‑Off Applies
During Liquidation
In company liquidation, insolvency set‑off applies automatically from the moment the liquidation commences. Creditors and the liquidator must calculate mutual obligations to determine the net position before dividend payments are made.
During Administration
In administration, set‑off applies when the administrator gives the statutory notice of intention to distribute. Before that point, mutual debts are not set off in the insolvency context, although contractual set‑off may still be invoked outside the insolvency rules.
Standalone Moratorium
A form of insolvency set‑off can also operate in a standalone moratorium (a temporary protection period) for valuation purposes, although distributions are not made at that stage.
Practical Example
To illustrate insolvency set‑off:
- Suppose Company A owes Creditor B £10,000 for goods supplied before insolvency, and
- Creditor B owes Company A £4,000 for a service provided before insolvency.
On liquidation, those mutual debts are set off automatically, and only the £6,000 balance is provable as a claim by Creditor B in the insolvency.
Without set‑off, Creditor B would have to pay its £4,000 debt and then separately prove a claim for £10,000, which could lead to unfair results and additional administration costs.
Relationship With Other Forms of Set‑Off
Insolvency set‑off is distinct from:
- Legal set‑off, which may arise in litigation outside insolvency; and
- Contractual set‑off, where parties agree in their commercial contracts to net mutual debts.
When insolvency set‑off applies, it displaces contractual and other forms of set‑off because the statutory rules are compulsory and prioritise collective creditor interests over private agreements.
Key Takeaways
Insolvency set‑off is a mandatory legal mechanism under UK insolvency law that ensures fair treatment of creditors and efficient resolution of mutual debts when a company enters liquidation or administration. It applies automatically where there are mutual credits, mutual debts or other mutual dealings between the insolvent company and a creditor before insolvency. The sums owed by each party are set against each other, leaving only the net balance payable by the creditor or provable in the insolvency. Insolvency set‑off cannot be excluded by contract and reflects a core insolvency principle: avoiding unjust enrichment and promoting orderly distribution among creditors.
