Set-off

Glossary category

What is set-off?

Set-off is a legal mechanism that allows two parties who owe debts to each other to extinguish their mutual obligations, wholly or partly, without making separate payments. In practical terms, if Party A owes money to Party B, and Party B also owes money to Party A, the parties may reduce the amount actually payable by deducting one claim from the other.

In Polish civil law, set-off is regulated in particular by the Civil Code. Under Article 498 of the Polish Civil Code, set-off may generally be made where two persons are at the same time debtors and creditors of each other, the subject of both claims is money or things of the same kind and quality designated only as to their type, both claims are due, and both may be pursued before a court or another state authority. The legal effect is that the claims are mutually cancelled up to the amount of the lower claim.

Set-off is commonly used in commercial relations, debt recovery, construction projects, supply contracts, corporate settlements and disputes between business partners. It may operate as a practical payment tool, but also as a defence against a claim. For this reason, it should be assessed carefully, especially where the existence, amount or due date of one of the claims is disputed.


What does set-off involve?

Set-off usually requires an analysis of both claims. It is necessary to determine whether the parties are mutually creditor and debtor, whether the claims are of the required type, whether they are due and actionable, and whether any contractual or statutory limitation excludes set-off. In many cases, the decisive issue is not whether the parties have business relations, but whether the specific claims meet the legal conditions for effective set-off.

Set-off may be made by a unilateral declaration, unless the parties choose to settle their mutual claims contractually. The declaration should identify the claims being set off with sufficient precision, including their legal basis, amount and due date. In commercial practice, a poorly drafted set-off statement may create uncertainty and increase the risk of litigation.

Set-off can concern, for example, unpaid invoices, contractual penalties, damages, reimbursement claims, loans, settlement balances, claims arising from defective performance, or amounts due under cooperation agreements. In litigation, a party may rely on set-off to argue that the claimant’s demand has already been extinguished or reduced. Procedural rules may affect how and when such an argument should be raised before the court.

Particular caution is required where set-off is used in insolvency-related situations, restructuring, consumer matters, employment-related settlements or cross-border transactions. In such cases, additional rules may apply, and the legal effects may differ depending on the governing law, the type of claim and the stage of proceedings.


When should set-off be considered?

Set-off should be considered whenever two parties have reciprocal financial claims and there is a need to reduce the flow of payments, simplify settlements or limit exposure to a counterparty’s non-payment. For individuals, this may arise in disputes concerning contracts, services, loans, property settlements or compensation claims. For entrepreneurs, set-off is often relevant in ongoing business cooperation, supply chains, lease relations, construction contracts, shareholder settlements and disputes with contractors.

It is also useful where a debtor receives a demand for payment but has its own claim against the creditor. Instead of paying the full amount and then pursuing a separate claim, the debtor may be able to invoke set-off. However, the effectiveness of this approach depends on whether the legal requirements are met and whether the claim used for set-off is sufficiently documented.

A quick legal consultation before making or rejecting a set-off declaration can help avoid common errors, including setting off a claim that is not yet due, relying on a claim that cannot be pursued, failing to identify the claim properly, or overlooking contractual restrictions. Such mistakes may lead to loss of a procedural defence, additional disputes, default interest, enforcement risk or unnecessary financial exposure.


Legal support in matters involving set-off

Legal assistance in relation to set-off may be important both before a dispute arises and during court or settlement proceedings. Proper assessment of set-off requires not only knowledge of civil law, but also an understanding of the commercial background, contractual documentation and evidentiary position of the parties.

Support from a law firm in matters involving set-off may include in particular:

  • assessment of whether statutory or contractual conditions for set-off are met,
  • analysis of mutual claims, invoices, contracts, correspondence and payment history,
  • preparation or review of set-off declarations,
  • advice on set-off as a defence in civil or commercial litigation,
  • representation in disputes concerning the effectiveness of set-off,
  • support in settlement negotiations involving reciprocal claims,
  • assessment of set-off risks in restructuring, insolvency or debt recovery matters,
  • drafting contractual clauses regulating or limiting the use of set-off.


Need legal assistance with set-off? Contact us.


See also

  • Debt Recovery
  • Business Dispute
  • Civil Litigation
  • Commercial Law