In the cation of the title compound, C(24)H(27)N(2)O(4) (+)·H(2)PO(4) (-)·C(3)H(8)O [systematic name: 3-(9H-carbazol-4-yl-oxy)-2-hydr-oxy-N-[2-(2-methoxy-phen-oxy)eth-yl]propan-1-aminium dihydro-gen phosphate propan-2-ol solvate], the mean planes of the tricyclic carbazole system and the benzene ring form a dihedral angle of 42.00 (16)°. In the crystal structure, classical inter-molecular O-H⋯O and N-H⋯O hydrogen bonds link the cations, anions and solvent mol-ecules into layers parallel to the ac plane.