What if supersymmetry breaking appears below the GUT scale?

We consider the possibility that the soft supersymmetry-breaking parameters m_{1 / 2} and m₀ of the MSSM are universal at some scale M_in below the supersymmetric grand unification scale M_GUT, as might occur in scenarios where either the primordial supersymmetry-breaking mechanism or its communication to the observable sector involve a dynamical scale below M_GUT. We analyze the (m_{1 / 2}, m₀) planes of such sub-GUT CMSSM models, noting the dependences of phenomenological, experimental and cosmological constraints on M_in. In particular, we find that the coannihilation, focus-point and rapid-annihilation funnel regions of the GUT-scale CMSSM approach and merge when M_in ∼ 10¹²   GeV. We discuss sparticle spectra and the possible sensitivity of LHC measurements to the value of M_in.