How to Bid a Construction Job (Without Losing Money)

A good bid does two things at once: it wins the job and protects your margin. Bids that are guessed rather than built are how contractors either lose work or lose money on the work they win. A repeatable process fixes both.

Start with an accurate takeoff

List every material and quantity the scope requires, then price them from current supplier costs. The more granular your takeoff, the less you have to pad the bid to cover uncertainty — and the more competitive you can be.

Price labor honestly

• Estimate labor hours by task, not by gut feel.
• Use your true burdened labor rate — wages plus taxes, insurance, and overhead.
• Include supervision and cleanup time, which are easy to forget.

Apply markup, not just margin

Cover your overhead and profit with a markup on total cost. Confusing markup with margin is one of the most common ways contractors quietly underprice work — make sure the number you add actually leaves profit after overhead.

Write a proposal that wins

Present the bid as a clear, line-itemed proposal with scope, inclusions, exclusions, allowances, a payment schedule, and a change-order clause. A professional proposal signals a professional job — and it protects you when scope questions arise later.