Looking into allowability of contingency fees charged by a tax consulting firm. A tax firm provided advisory/consulting support for city property valuations. The amount paid to the tax firm was 25% of the tax savings associated with the reduction in property valuations. I can't find anything in FAR 31 would expressly disallow these types of fees. Agreement/SOW, invoices, and work product were retained to support FAR 31.205-33 Consulting costs requirements. The 25% contingency fee seems to be a standard/reasonable amount for these types of services based on online research.
Anyone with background or other advice?