N.H. Rev. Stat. Ann. § 371:7

The commission shall determine and fix the amount due to any guardian appointed by it for services and disbursements in connection with any proceedings before the commission, and the portion thereof that justice requires shall be payable out of any award that may be made for any land or right of the ward that may be taken except as otherwise provided in RSA 371:5-a. The balance of the amount due the guardian and, if no award is made, the whole of such amount shall be payable by the public utility.