Is the iff fee allowable cost?

The "IFF" fee, or Indirect Federal Funds fee, is generally considered an allowable cost when it is specifically authorized by the terms of the grant or contract governing the funding. However, whether it is allowable can depend on the specific regulations and policies of the funding agency, as well as the context in which the fee is incurred. It's important to review the relevant guidelines and consult with the funding agency or a compliance officer for clarification.