According to The Chicago Manual of Style (14th ed., 1993) "... when academic degrees are referred to in general terms as doctorate, bachelor's degree, master of science, they are not capitalized." (7.26 at p. 244) I do not offer this as authority re capitalization but as evidence of the usage of "bachelor's degree" in a respected source.

In my own pedantic way, I would be reluctant to use the term "bachelor's degree" for any purpose. It strikes me as colloquial. I think it better to use the precise term, e.g. Bachelor of Arts, Bachelor of Legal Letters, Bachelor of Divinity. I have no authority for this preference save my ear.