Expenses for photography may include charges for assistant(s), photo finishing, special equipment or prop rentals, stylists, costs for location access, models, special insurance and miscellaneous expenses. A large part of this can also be made up of travel expenses including airfare, extra baggage fees, rental car, hotel, meals, and other incidentals.
Finally, be certain to discuss your final presentation needs as they relate to specific forms of media. Do you require color prints, electronic files or other specific deliverables? Remember to specify the digital file sizes and quantities you will need.