Micropiles are being increasingly utilized in many ground improvement applications to increase the bearing capacity and reduce settlement, particularly for underpinning existing foundations. This paper presents a two dimensional numerical analysis of the behaviour of a single micropile installed in soft clay and subjected to compression loading. The behaviour of soil is simulated using the elastic-perfectly plastic stress-strain relationship incorporated with the Mohr-Coulomb failure criterion. The study also examines the effect of micropile geometrical configurations and interface parameters on the estimated capacity.