Sidgwick claimed Kant as one of his moral philosophical masters. This did not prevent Sidgwick from registering pointed criticisms of most of Kant’s main claims in ethics. This paper explores the practical ethics of Sidgwick and Kant. In § I, I outline the element of Kant’s theoretical ethics that Sidgwick endorsed. In §§ II and III, I outline and adjudicate some of their sharpest disagreements in practical ethics, on the permissibility of lying and on the demands of beneficence. In § IV, I argue that compared to Kant, Sidgwick has a better strategy for overcoming disagreement in practical ethics. §V sums things up.