Threshold corrections relate the Lagrangian parameters of the broken and unbroken phases. In this work, we present a calculation of the one-loop threshold corrections within the SMEFT framework, providing process-independent quantities that can be incorporated into SMEFT NLO corrections to collider observables and used for consistent RG analyses. Particular emphasis is placed on the analytical and numerical aspects of the threshold calculations, as well as on a bottom-up RG analysis.