We analyse the importance of climate-related investment using a large economy-wide survey of UK firms. Over half of firms expect climate change to have a positive impact on their investment in the medium term, with around a quarter expecting a large impact of over 10%. Around two thirds of these investments are expected to be in addition to normal capital expenditure, with some firms investing less elsewhere. Climate investments are expected mainly in switching to green energy sources and improving energy efficiency, and firms expect to finance these mainly using internal cash reserves. Climate investment will be driven by larger firms as well as those in more energy‑intensive sectors. Although firms are expecting to invest more resources in adapting to climate change, under reasonable assumptions, these investments are still not sufficient to meet the estimated targets implied by the UK Net Zero Pathway.