The effect of substitution of the bromine atom (as well as other halogen atoms) in neutral aromatic rings on the core-valence transitions in the carbon K-edge region has been investigated in the past. In contrast, the influence of halogen atoms on the core-valence transitions at the carbon K-edge in the cations has not been studied before. In this work, we examine the influence of a bromine atom on the core-valence transitions in BrBz + by comparing the experimental near-edge x-ray absorption fine structure spectrum (NEXAFS) of BrBz + with the spectrum of neutral BrBz and with our recent spectrum of Bz + in the same energy region, 9,10 combined with electronic structure calculations. Specifically, we used the density functional theory/restricted open shell configuration interaction singles (DFT/ROCIS) method associated with molecular dynamics (MD) simulations adopting the B3LYP functional, and the def2-TZVP basis set.