<p>This study investigates the axial compressive behaviour of cold-formed steel built-up short columns with infilled basalt fibre-reinforced concrete. Square and circular shaped short columns were cast with varying dosages of basalt fibre (0, 0.25, 0.5 and 0.75 ) percent added by weight of cement in concrete. The circular columns were limited to unconfined samples only, while the square columns were assessed for the combined effect of fibre reinforcement and steel confinement. Thirty six samples were tested to analyse the peak load capacity, failure pattern, effect of fibre dosage, effect of confinement, ductility index, strength index and post-peak fracture energy. Significant improvement in peak load capacity and ductility index were observed in confined samples with 0.5% basalt fibre compared to control sample. The peak load carrying capacity of samples were inline with the calculated peak load from the design guidelines of international codes of practice. A modified equation is proposed using RSM (Response Surface Methodology) in line to the EC-4 guidelines to predict the capacity of similar composite sections subjected to axial compressive loading.</p>