Reliable quantum mechanical (QM) methods based on density functional theory (DFT) and coupled cluster (CC) theory have been developed for the calculation of chiroptical properties, using response theory to evaluate the appropriate OR tensor. However, these techniques are based on approximate solutions of the Schrödinger equation, which affect the accuracy of the calculations and may compli-cate the comparison with experiment. The need to effectively represent electron correlation in the calculation of OR has been well established. While DFT methods present a cost efficient means of accomplishing this, CC methods maintain the allure of being systematically improvable by including higher order excitations. The basis set dependence of OR calculations has been investigated at DFT level. Mach and Crawford examined the basis set dependence of CC with single and double excitations (CCSD) with the LPol basis sets along with the augmented correlation consistent basis sets of Dunning. Srebro et al. also tested the LPol basis sets, showing that they do not outperform aug-cc-pVDZ. This work also provides insight on the potential benefits of using a functional with a long-range correction. Howard et al. investigated the performance of the ORP basis set with CC methods, and Haghdani et al. studied the basis set dependence of CC methods in comparison with DFT for a set of seven molecules. Much work in pursuit of improving accuracy and reducing computational cost of OR calculations has been done through manipulation of the basis set. The work of Cheeseman et al. has demonstrated the importance of diffuse functions for OR calculations. Basis sets specifically for determination of optical properties have been developed. The LPol basis sets of Baranowska and Sadlej 29 augment the sets of Duijneveldt with diffuse and polarization functions. The ORP basis set of Baranowska and Laczkowska was later developed, in which the basis sets of Schäfer et al. were modified with contracted diffuse and polarization functions, resulting in smaller basis sets than the LPol sets. Recently our group proposed two minimal basis sets, augD-3-21G and augT3-3-21G, both of which are formed from augmenting the 3-21G set with diffuse functions from the parent Dunning correlation consistent basis sets optimized for OR calculations, based on an initial study of Wiberg et al. with unoptimized functions. These basis sets were proposed with the intent of maintaining the quality of a large basis set while decreasing the cost of OR calculations.