The number of locations does not by itself create a per-site L-1B filing charge. Costs depend on the required filings and route, while a complex itinerary may increase the work needed to document duties and supervision.
Budget changes as well as launch
Separate travel expenses from immigration preparation, government charges, applicable supplements and optional premium processing. Ask how later client or location changes will be reviewed and priced if further filings become necessary. Do not assume that paying for one petition makes every future site covered; the substance of the assignment controls the review.
Agree in advance which party absorbs the cost of an itinerary change. A customer that moves a commissioning window creates work for your immigration adviser as well as your schedulers, and the contract rarely mentions it. Naming the payer now avoids a negotiation at the moment speed matters.
Hold three lines distinct: travel and accommodation, which are operating costs; preparation and government charges for the current filing; and any further filing a materially different assignment might require. Optional premium processing belongs in the third line, not the first. Ask your adviser what triggers a re-review and which documents you would have to supply for one.
That gives a project manager something concrete to weigh before agreeing to a customer’s change.