Purposivism is an approach to statutory interpretation in which courts seek to give effect to the purpose or underlying policy of legislation, rather than relying solely on the literal meaning of the text. Judges ask what Parliament or the Oireachtas was trying to achieve and interpret ambiguous or open-textured wording in light of that objective.In the UK and Ireland, purposivism is not usually defined in legislation; it is a descriptive term drawn from case law and academic commentary. It overlaps with, but is broader than, the “mischief rule” and aligns with the modern contextual approach to statutory construction.Across England and Wales, Scotland, Northern Ireland and Ireland, courts commonly use purposive reasoning, especially in areas such as EU-derived law, human rights, tax, planning and regulatory legislation. The extent of purposivism varies: some decisions emphasise the ordinary meaning of the words, while others give significant weight to legislative purpose, travaux préparatoires or explanatory memoranda.For practitioners, purposivism is important in drafting submissions, advising on statutory risk, predicting how courts may resolve ambiguity, and using external aids to interpretation such as Law Commission reports or parliamentary materials. Usage is broadly consistent across the four jurisdictions.