Magnetic hysteresis of CaAlSi single crystal has been studied to extract the critical current density at several temperatures for H c and H ab. There is a clear peak effect in the hysteresis curve with H for H c. The upper critical field in CaAlSi has been studied by magnetic and transport measurements. Measuring the resistivity as a function of magnetic field at constant temperature below the transition temperature we have found out that the upper critical field for various angle, θ, between the ab-plane and applied magnetic field, shows a cusp-like variation. The variation of anisotropic upper critical field as a function of θ has been compared with the Tinkham's formula rather than the GL anisotropic mass model. The complex ac permeability has also been measured as a function of dc magnetic field using lock-in technique. The angular variation of the upper critical field obtained from ac permeability is consistent with the cusp-like behavior. The peak effect is very weak in ac permeability for H ab.