Equitable set-off Equitable set-off, also known as transaction set-off, arises where the parties have cross-claims that are inseparably connected with each other, such that allowing the claimant to succeed without taking into account the defendant’s own claim would be inequitable. Equitable set-off is a substantive defence to the claim and can be asserted by the defendant in the absence of judicial proceedings, eg by way of response to a demand for payment by the claimant. There is no need for the two claims to be for liquidated damages: the defendant’s own claim can be for an unliquidated sum to be assessed by the court. Cross-claims usually, but do not have to, arise out of the same contract. If the two claims are inseparably connected