This final version of the CoST Business Plan 2021 – 2025 is the the most ambitious and researched ever produced by CoST, appropriate to the extraordinary times in which it is published. Following extensive public consultation in 2020, this outlines intentions to achieve a step-change in impact in delivering a new mission: ‘Quality infrastructure, stronger economies and better lives.’ Importantly, it details how CoST can provide an effective response to crises and pressing global issues.