Your white label product is a mass market thing. F500 companies expect a more hands service. Here's what I would do: Offer an initial consultation period (say

Your white label product is a mass market thing. F500 companies expect a more hands service. Here's what I would do: Offer an initial consultation period (say 2-4 weeks), at a suitable rate ($100 - $200 per hour) Spend the time meeting with all people involved. The consultation period will probably be extended, because everyone will have different opinions and more folks will get dragged in and it will be hard to schedule time with the important decision makers. During this time you need to establish what value the client attaches to the project (how much money will it make or save them?) This is the infamous "value proposition". You need to capture as much of this as possible - this is the budget you should be aiming for. How much of this you can capture will depend on how much any alternatives you identify would cost (competitors and/or internal development). An important part of your final offering will be support. It's probably best to price the final deliverable lower and charge more for support, since that will be a recurring income.