In principle, any error due to the limitation of DFT methods should depend on the whole molecular structure. The limit of accuracy for a bond-based correction approach can be associated with the error in DFT energy when there is no bond change. In our dataset, 15,091,474 reactions (about 9.3%) fall in this category. Such reactions have MAE of 0.066, 0.078, and 0.083 eV for PBE, B3LYP-D, and M06-2X functionals, respectively ( Figure ).