The redshift accuracy for simulated supernovae with (upper panel) and without (lower panel) a host galaxy photometric redshift. The ~2000 SNe of all different subtypes used to make this figure are a sub-sample of the full sample of simulated light curves. The redshift on the x axis (z_sim) is the initial adopted redshift of the supernovae. The dotted lines indicate the |z_fit − z_sim|/(1 + z_sim) > 0.15 limits.