This archive contains the data plotted in the paper A. Bhattacharya and C. Timm, Stability of Bogoliubov Fermi surfaces within BCS theory, Phys. Rev. B 107, L220501 (2023) and its Supplemental Material. For this paper, the superconducting gap and the energy gain in the superconducting state relative to the normal state were obtained by solving the inverse BCS gap equation. The required integrals over the Brillouin zone were performed using global-adaptive integrations with high precision in Mathematica.