Perturbative spin-orbit couplings were presented for the Tamm-Dancoff approximation of linear-response time-dependent density functional theory, relying on the AMEW ansatz and a one-electron ZORA Hamiltonian as well as SOC-corrected pseudopotentials. All-electron spin-orbit splittings and couplings are in agreement with DFT/MRCI reference results with errors in excitation energies and spin-orbit matrix elements being below 0.2 eV and 5.8 cm -1 , respectively. Relying on pseudopotentials, root-mean-square deviations increase by an order of magnitude. Computation of the perturbative correction represents less than 3% of the overall computation time. The ansatz could thus be beneficial for non-adiabatic molecular dynamics, in particular the description of intersystem crossing.