  The latest Planck data allow one to determine the dark matter relic density
with previously unparalleled precision. In order to achieve a comparable
precision on the theory side, we have calculated the full
$\mathcal{O}(\alpha_s)$ corrections to the most relevant annihilation and
coannihilation processes for relic density calculations within the Minimal
Supersymmetric Standard Model (MSSM). The interplay of these processes is
discussed. The impact of the radiative corrections on the resulting relic
density is found to be larger than the experimental uncertainty of the Planck
data.
