N.H. Rev. Stat. § 420-A:27
Except as otherwise expressly provided for by law, every health service corporation doing business pursuant to this chapter is hereby declared to be a nonprofit and benevolent organization and to be exempt from all taxes, other than taxes on real property situated within this state, fees on motor vehicles registered in this state, fees prescribed by this chapter, and the premium tax under RSA 400-A:32. Except for payments made by the state of New Hampshire no tax shall be levied on any premiums, fees-for-service and other payments for health, dental, and employee benefit coverages from political subdivisions of the state of New Hampshire, or from employees or retirees of such political subdivisions, either directly or indirectly. Nor shall any tax be levied on any revenues of such a health service corporation that are derived from any business of the corporation where the corporation has assumed no insurance risk and is providing administrative services only.
RSA 420-A:27
1997, 190:1, eff. Jan. 1, 1998.