We consider the most minimal scale invariant extension of the standard model that allows for successful radiative electroweak symmetry breaking and inflation . The framework involves an extra scalar singlet , that plays the rĂ´le of the inflaton , and is compatibile with current experimental bounds owing to the non-minimal coupling of the latter to gravity . This inflationary scenario predicts a very low tensor-to-scalar ratio r \approx 10 ^ { -3 } , typical of Higgs-inflation models , but in contrast yields a scalar spectral index n _ { s } \simeq 0.97 which departs from the Starobinsky limit . We briefly discuss the collider phenomenology of the framework .