The widespread adoption of carbon fibre across industries is still limited due to the high cost of raw materials and the energy required during production. Additionally, the environmental impact of the manufacturing process can diminish the potential benefits of weight reduction and material savings in the final products. This chapter introduces a dynamic, modular Life Cycle Assessment (LCA) and Life Cycle Costing (LCC) model specifically designed for carbon fibre production. The model aims to speed up the assessment of carbon fibre production and facilitates the exploration of different scenarios, such as using alternative precursor materials, varying carbon fibre grades, or adjusting production parameters. The chapter further details the model, describes its application environment, and demonstrates its use with data from a pilot-scale carbonization line.