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In the crystal structure of the title salt, C8H12N+·C2F3O2−, all of the ammonium H atoms serve as donors for hydrogen bonds to carboxylate O atoms, forming an R43(10) ring motif based on two cations and two anions. Since both cations and anions act as inter-ion bridging groups, R(10) rings aggregate in a one-dimensional supramolecular network by sharing the strongest N—H...O bond. Edge-sharing motifs lie on the twofold screw axis parallel to [010], and antiparallel packing of these 21-column structural units results in the crystal structure. This arrangement is one of the most commonly occurring in conglomerates of chiral 1-phenylethylamine with achiral monocarboxylic acids, confirming that these ionic salts are particularly robust supramolecular heterosynthons useful in crystal engineering.