It varies with how far the paperwork has drifted. Accounting and corporate legal work to reconstruct registers, resolutions and financial statements is commonly the largest pre-filing expense, ahead of government fees.
The invoice reflects years of informality
Hypothetical example: Closely held businesses often operate on understandings rather than documents, and the immigration file is where that catches up with them. Reconstructing a share register, preparing the resolutions that should have recorded past decisions, updating shareholder agreements and producing financial statements to a standard an adjudicator will accept all require professional help. None of it is wasted — it is work the company needed anyway — but it should be budgeted honestly rather than treated as incidental.
Government filing fees are separate, are published in the USCIS fee schedule, and should be read there because amounts and processing options change. A Cavan Monaghan company deciding whether to proceed should price the record-keeping work first, since it is both the largest variable and the one that determines whether a filing is possible at all.