An intellectual property clause is a contractual provision that allocates rights and obligations in relation to intellectual property (IP) such as copyright, trade marks, patents, design rights, database rights and confidential information. It is a descriptive term rather than one defined in UK or Irish legislation, but is widely used in commercial contracts, IT and software agreements, R&D and collaboration agreements, employment and consultancy contracts, and IP licensing and assignment documents. Typical intellectual property clauses address ownership of pre-existing (“background”) and newly created (“foreground”) IP, licences (scope, territory, duration and exclusivity), moral rights, improvement rights, use of trade marks and branding, open source software, confidentiality, infringement risk and indemnities, and post-termination use of IP. They are critical in avoiding disputes over who owns key technology, content or data, and who may exploit it commercially. Across England & Wales, Scotland, Northern Ireland and Ireland, usage and drafting practice are broadly consistent, although underlying statutory IP regimes and case law may differ. Precision in intellectual property clauses is essential, as courts will primarily interpret them by standard principles of contractual construction.