This master thesis presents a comprehensive techno-economic analysis of high temperature heat pumps (HTHPs), specifically those capable of delivering heat over 100 °C, within the Swedish pulp and paper industry. This study is driven by the substantial energy consumption of the industry, which accounted for approximately 75 TWh in 2021, nearly half of the Swedish industrial energy usage. The analysis is conducted through an extensive literature review and detailed case studies of two Swedish pulp and paper mills, Braaviken and Hallstavik, owned by Holmen AB. Given the industry’s significant heat demand and potential for energy efficiency improvements, this research evaluates the feasibility, economic viability, and environmental benefits of integrating HTHPs. The findings aim to support the industry’s efforts in reducing GHG emissions and progressing towards sustainable energy solutions, contributing to the broader EU targets of achieving an 80 % reduction in industrial GHG emissions by 2050. This study not only highlights the potential of HTHPs in decarbonizing industrial processes but also addresses the operational and economic challenges associated with their adoption.