Recoupment describes a party’s right to withhold or deduct money otherwise payable, in order to satisfy a cross‑claim arising from the same transaction or closely connected dealings. In practice, it allows a debtor to “net off” its claim against the creditor’s demand, reducing or extinguishing the sum due rather than paying in full and then suing separately.In UK and Irish legal practice, recoupment is often discussed alongside set‑off and counterclaim. Unlike set‑off, which may involve independent claims, recoupment is typically confined to defences linked to the same contract or transaction (for example, a buyer recouping damages for defective goods from the seller’s price claim).The concept is mainly developed through case law and contractual drafting rather than a single statutory definition, and it appears in a range of contexts including commercial contracts, construction, employment, tax and social security. Usage and underlying principles are broadly consistent across England and Wales, Scotland, Northern Ireland and Ireland, although terminology and procedural rules on asserting deductions may differ. Recoupment is practically significant because it affects litigation strategy, insolvency risk, drafting of payment and deduction clauses, and the assessment of recoverable sums in dispute resolution.