So I am currently bidding on a very large project. We're talking in the $10-20M range for our part of the work. It's site prep including grading, paving, signage, landscape, concrete, etc. This project is quite a bit larger than we are used to bidding but we have assets to handle the job. What I'm looking for is advice on gross profit margin. How low should it go for a project of this size. I have always been told that the higher the over all contract value the lower the GPM. Normally we would figure all exact costs and go somewhere in the +20% range. That is for jobs of say $2M or less.