This document provides an overview of liquidated damages. It defines liquidated damages as a sum agreed upon in advance that is payable if one party defaults. The history of liquidated damages dates back to 1838, with key cases establishing that liquidated damages cannot act as a penalty. Issues around liquidated damages include whether they are an unenforceable penalty and proving actual damages if they are. Standard construction contracts often include liquidated damages provisions. Recent cases have addressed liquidated damages in both construction and sports contracts. Some jurisdictions like South Africa and India have passed statutes allowing penalties through legislation.