The test set consists of 3 cations, 106 neutrals, and 12 anions, and Table presents the extrapolated total energies for each charge state separately. In the {D,T} extrapolation, the jul basis set outperforms both jun and aug, while the jun basis set performs slightly worse than both jul and aug for cations and anions. However, in the {T,Q} extrapolation for cations and anions, both jun and jul perform just as well as the aug basis set. The results for neutrals follow the same trends as observed in Table , where all three basis sets perform equally well. Since the above results show that the jun and jul basis sets perform just as well as aug basis sets, the next objective of this study was to compare the computational load associated with the jun, jul, and aug calculations. Table shows the number of contracted basis functions used in the calculations for several molecules with aug, jul, and jun-cc-pVXZ basis sets. The number of contracted basis functions is important because of the scaling of the computational effort of CCSD(T) with the size of the basis. It is often stated that in the limit of large n, where 𝑛 is the number of contracted functions, the computational effort of CCSD(T) calculations scales 𝑏𝑛 ; , where b is a constant. It is more informative to look at the costs of two leading terms, that is the iterative CCSD part and that of the noniterative (T)