The law on deductibility of expenditure incurred for an illegal purpose has had a long history with the Courts & Tribunals taking a practical view of the matter & upholding the assessee’s claim. Though the Explanation to s. 37(1) was inserted to supersede these judgements, there is still scope to argue that some types of unlawful expenditure are deductible, says the author, and makes good his contention by reference to several case laws