  We perform a threshold resummation calculation for the associated production
of squarks and electroweakinos at the LHC to the next-to-leading logarithmic
(NLL) accuracy. Analytical results for the process-dependent soft anomalous
dimension and the hard matching coefficient are presented. The resummed results
are matched to fixed-order predictions at next-to-leading order (NLO) in QCD,
which are generalised to scenarios with non-universal squark masses and
mixings. Numerically, the NLL contributions increase the total NLO cross
section by $2\%$ to $6\%$ for squark masses ranging from 1 TeV to 3 TeV,
respectively, and they reduce the dependence of the predictions on the
factorisation and renormalisation scales from typically $\pm10\%$ to below
$\pm5\%$. Our NLO and NLO+NLL calculations have been implemented in the
publicly available program Resummino.
