The Form I-129 fee and the statutory L-1 surcharges in the USCIS fee schedule are unavoidable for the petitioner; premium processing is optional. Translations and advisory work are private costs.
Budget the schedule, then decide what speed is worth
The U.S. affiliate is the petitioner and pays the government charges. The USCIS fee schedule (G-1055) sets the Form I-129 fee for an L petition and lists the additional statutory charges that attach to L-1 filings, including the fraud prevention and detection fee and any surcharge that applies based on the employer's size or workforce; check the schedule at filing rather than relying on a figure from an earlier year.
Premium processing is an optional fee that buys a faster decision clock. What the company controls is the cost of getting the managerial question wrong: a denial spends the fees and requires a new petition that must address the earlier finding. Certified translations of the chart, payroll and share registers from French, and advisory fees for assembling the file, are private costs and should be shown separately in any budget the manager sees.