An approved quote can still generate a loss when part of the delivery has not been considered. Small services repeated across every job are particularly easy to miss.
What to review
Include profiles, hardware, glass, waste, labor, installation, freight, travel, taxes, rework and payment fees. Items need not all be charged separately, but they must all be considered.
Watch for changes
Revised dimensions, colors, glass and urgent requests affect costs. Record the new terms and explain the impact before confirming the sale.
Use a brief review
Apply a fixed checklist to every proposal. Turn individual memory into a step anyone on the team can repeat.
A cost base linked to quotes supports this check. See how to protect your margin.