N.H. Code Admin. R. Rev 301.11
“Costs of performance”, pursuant to RSA 77-A:3, I(c) in effect prior to January 1, 2021 for taxable periods ending before December 31, 2021, reprinted in Appendix B, means the direct costs of providing the service or activity determined in a manner consistent with generally accepted accounting principles and in accordance with practices prevalent in the trade or business of the organization.
Source. #4192, eff 12-23-86; ss by #5490, eff 10-19-92; ss by #6853, eff 9-23-98; ss by #8709, eff 8-25-06 (formerly Rev 301.10); ss by #10758, eff 1-16-15 (from Rev 301.10); ss by #13177, eff 3-6-21; ss by #14231, eff 4-3-25, EXPIRES 4-3-35