Keep government filing charges apart from company document preparation, legal fees, and any family filings. A new office's business start-up costs are a distinct category of spending and should not be described as part of the immigration filing fee.
Confirm what a quoted fee actually covers
Ask whether a professional fee includes the eligibility assessment, petition drafting, any expedited processing request, and responses to a request for evidence, or only part of that work. Confirm the current official filing fee for this specific employer and petition rather than relying on a figure from an earlier or different filing.
Ask an accountant or corporate records specialist to estimate the work needed to produce clear ownership and payroll documentation if it does not already exist in an organized form, and treat that as a distinct cost from the immigration filing itself. The fee schedule lists the base I-129 charge and any additional statutory fees that apply to L petitions, and the employer may elect premium processing to obtain a decision within a fixed window. Corporate evidence has to be gathered from lawyers, accountants and registries in two countries, and a group with an intermediate holding company will spend real time producing a chart that survives scrutiny.