Comparing each smaller basis set to the largest set considered, aug-cc-pVTZ, we see similar results to the increasing pairwise comparison (Table ). Again, simple linear regression analysis reveals slopes close to one and R 2 values of or nearly 1.00, even when comparing the largest basis set to a non-augmented double zeta basis set. The speed-ups are also worth noting, since even using a partially-augmented basis set (jun-cc-pVTZ) provides over a 2x speedup over the traditionally augmented set. Timings are shown in more detail in the box plot in Figure , where the range of calculation times for each basis set is shown to decrease substantially as the sets become smaller. The large speed-ups provided by non or partially augmented basis sets, combined with lower risk of linear dependence issues, make them better, albeit less accurate, choices for polarizability calculations for large systems. The linearity between systematically larger ba-sis sets suggests that for species with large polarizabilities, the increase in accuracy of the magnitude of the polarizability is not substantial, and that a simple linear correlation coecient could be used to correct large polarizabilities found with smaller basis sets. Given the increased RMSE observed with cc-pVDZ, we suggest that for routine use on large molecules, non-augmented triple zeta basis sets, as used here, are an e cient balance of time and accuracy.