N.H. Rev. Stat. Ann. § 94:4

Any state official who has completed 10 years of service for the state shall be paid, in addition to his or her statutory salary the sum of $350 annually and an additional $350 for each additional 5 years of state service. Any state official who transfers, without a break in service, to a position in the classified system may transfer all time served for purposes of longevity pay.