A photometric study of BH Cas

New CCD observations of the contact binary system BH Cas are presented in t his paper. New times of minima and an ephemeris based on our observations a re also given. Complete light curves obtained in the V, R and I filters hav e been analyzed with the Wilson-Devinney code to derive the geometrical and physical parameters of the system. The final solution leads to a contact c onfiguration (f approximate to 21-22%). We have found that the photometric mass ratio differs from the spectroscopic one by about 13%, a discrepancy w hich is not uncommon for other W UMa systems. The absolute elements of the system are used to study its evolutionary status. The results show that BH Cas is a fairly evolved W-type W UMa system.