  For the general Two-Higgs-Doublet model, we present conditions for having
spontaneous CP violation, in terms of physical masses and couplings. These
relations involve the charged-Higgs mass, its cubic couplings with neutral
scalars and quartic coupling, and become particularly simple in the alignment
limit. In the simplified model with softly broken $Z_2$ symmetry, some
deviation from alignment is required for spontaneous CP violation to be
present.
