I guess I never understood why it was customer/clients business to know what my markup and overhead costs are. If they ask for a bid and give the specifications to bid to why does it matter if I have $1000 of markup or overhead vs $2000 when the bottom line to them is the total bid?If I understand why you wrote this I adamantly disagree. Change orders rarely make anyone any money. In my experience I would MUCH rather have a job that gets installed 100% to the plans with no changes. It is even worse nowadays when many contracts limit overhead to 10 or 15%. I used to write a change to cover my costs. Now I have to include, printing, material person, project manager, foreman, itemize, tape, hacksaw blades etc. and then argue every penny to break even. No thanks.
Do you go to the grocery store and ask them how much of the sale price of an item is for overhead costs? Well there maybe some people that would, but most just pay the marked price with no other questions asked. Discrepancies in the marked price and price at the cash register is not the same thing. Now when purchasing big ticket items like furniture, appiances, automobiles etc. it is more common to negotiate prices, but generally the consumer still has no idea what the seller cost of the item was or how much overhead and markup was actually collected. Sometimes they get rid of things below cost, but for good reason, but to get rid of everything below cost doesn't seem profitable to me.