The asymmetric unit of the title salt, (C₁₀H₈S₈)[Re₂Br₆(CH₃COO)]·0.5C₂H₃Cl₃, contains one bis(ethylenedithio)tetrathiafulvalene (ET) radical cation, one μ₂-acetato-bis[tribromidorhenate(III)] anion and a 1,1,2-trichloroethane molecule with half-occupancy disordered about a twofold rotation axis. The tetrathiafulvalene fragment adopts an almost planar configuration typical of the ET radical cation. The C atoms of both ethylenedithio fragments in the cation are disordered over two orientations with occupancy factors 0.65:0.35 and 0.77:0.23. In the anion, six Br atoms and a μ₂-acetate ligand form a strongly distorted cubic O₂Br₆coordination polyhedron around the Re₂dinuclear centre. In the crystal, centrosymmetrically related ET cations and Re₂O₂Br₆anions are linked into dimers by π–π stacking interactions [centroid-to-centroid distance = 3.826 (8) Å] and by pairs of additional Re...Br contacts [3.131 (3) Å], respectively. The dimers are further packed into a three-dimensional network by non-directional interionic electrostatic forces and by C—H...Br and C—H...S hydrogen bonds. The disordered 1,1,2-trichloroethane molecules occupy solvent-accessible channels along thebaxis.