I'm curious to see what others are doing as for billing for extra items which you wouldn't normally itemize on the bill to the customer. For instance, do you add a percentage to cover small things like staples, wood screws, wire connectors, etc? Or do you bill them out separately, or roll them into your markup? What about consumables like saw blades, grinding disks, drill bits, etc? How about a fuel surcharge?
What I've been doing is getting a rough idea of small stuff we've used and charge it separately under "misc. supplies". Any feedback would be appreciated.
