To test the accuracy of single-precision calculations of excited states, we carried out EOM-EE-CCSD calculations for uracil and EOM-SF-CCSD calculations for C 6 H 5 N. We considered a range of different states: singlets and triplets, states with different symmetry (symmetric and antisymmetric with respect to the symmetry plane), closed-shell and open-shell types, valence and Rydberg states. In all cases, the difference between total energies computed in double and single precision does not exceed 3 J/mol (3 • 10 -5 eV), which is much smaller than the intrinsic error bars of EOM-CCSD (0.1-0.3 eV). This result is comparable to the differences in the CCSD total energies. The respective excitation energies are the same within at least 4 decimal figures.