When a contractor or worker comes back to me after negotiations with any kind of overage, I become very sour.
From my perspective it would be better to tell them up front during negotiations that you do this as part of the way you offer your service.
That was my idea, yes. It would/will be part of the negotiation process.
That's great! I think that is exactly right. It also gives a really great opportunity to educate the client about how a lot of the work is actually done. The people who are actually making the deal on the client-side probably don't understand the full amount of work and sourcing that goes into a project.
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