N.H. Rev. Stat. Ann. § 100-A:43-b

Any officer or employee withdrawing from the retirement system pursuant to RSA 100-A:43 and 100-A:43-a shall be entitled to withdraw his accumulated member contributions which shall be credited with accumulated interest to the date of withdrawal. After withdrawal, the employer will cease to be required to make contributions to the retirement system for the normal contribution or to the balance of the established unfunded accrued liability.