The government charges are the Form I-129 filing fee with the L supplement, published in the USCIS fee schedule at Form G-1055, plus premium processing where speed matters. The heavier cost is preparing the corporate record: reconstructing the ownership trail, restating charts and producing evidence that both entities trade.
The filing fee is the smallest line on the invoice
Groups that grew by acquisition rather than by design usually discover that their paperwork was never written to be read by a stranger. Reconstructing a clean ownership chain across a holding company and two operating builders can mean retrieving old share transfers, correcting registers that were never updated, obtaining certificates of good standing and having an accountant confirm the structure in writing. That work has a real price and it is the price of the petition, not an extra.
On top of it sit legal fees for drafting and for answering any request for evidence, translation of documents that are not in English, and the internal time of managers who must describe their own jobs precisely. Fee amounts published by USCIS change from time to time, so the schedule should be checked at the moment of filing rather than remembered from a previous case. Set against those numbers, the cost of a refusal is a delayed American season and a corporate story that the next filing has to explain.