N.H. Rev. Stat. Ann. § 275:37
I. No employer or person seeking employees shall discriminate between employees on the basis of sex by paying employees of one sex at a rate less than the rate paid to employees of the other sex for equal work that requires equal skill, effort, and responsibility and is performed under similar working conditions, except where such payment is made pursuant to:
Source. 1947, 193:2. 2000, 133:1, eff. Jan. 1, 2001. 2014, 227:1, eff. Jan. 1, 2015.