A bad bid can cost you the job. A poorly scoped bid can cost you your profit — or worse, leave you finishing a job at a loss. Writing a winning bid is both an art and a science. Here’s the framework that keeps your pipeline full and your margins healthy.
Why Most Contractor Bids Lose
The two most common reasons bids fail:
- Too vague: “Remodel kitchen – $12,000” leaves everything open to dispute. Clients question everything.
- Not clearly scoped: You think demo includes hauling. Client assumes you’ll patch the drywall. Neither agreed. Now there’s a conflict.
The solution: specific, detailed, written bids that define exactly what is and isn’t included.
The 8 Components of a Professional Contractor Bid
- Project scope of work: Exactly what you will do, listed line by line
- Materials: Specified by brand, grade, or standard (“LVP flooring, $2.50/sq ft product” not just “flooring”)
- Labor breakdown: Hours or flat rates per task
- What’s NOT included: Explicitly state what’s excluded (permits, engineering, appliances, etc.)
- Timeline: Start date, milestones, completion date
- Payment schedule: 30% deposit, 30% at milestone, 40% on completion (or similar)
- Change order policy: Any work beyond scope requires a written, signed change order before work proceeds
- Warranty terms: What you warranty and for how long
How to Calculate Your Bid Price
Don’t estimate off the top of your head. Build your bids from the bottom up:
- Materials cost: Price out every material line item. Add 10% for waste and overages.
- Labor cost: Estimate hours per task x your labor rate. Be realistic — not optimistic.
- Subcontractor costs: Get actual quotes from any subs you’ll use (plumber, electrician, HVAC)
- Overhead allocation: Your truck, insurance, tools, office — typically 10–15% of job cost
- Profit margin: Add 10–20% depending on job type, risk, and relationship
- Contingency: Add 5–10% for surprises, especially on renovation work
The Site Walk is Non-Negotiable
Never bid a job without walking the site in person. Photos lie. Sellers and owners downplay issues. You need to see the actual conditions to estimate accurately.
During the walk, look for: existing damage that could affect your scope, access challenges, material lead times needed, permit requirements, and anything that’s not visible in photos.
Following Up on Bids
Most contractors send a bid and wait. Top contractors follow up:
- Send the bid within 24–48 hours of the site walk
- Follow up by phone within 3–5 business days if no response
- Ask directly: “Is there anything in the scope or pricing I can clarify?”
- Have a policy on how long your bid price is valid (30 days is common)
The Bottom Line
A detailed, professional bid signals to clients that you run a professional operation. It protects both parties from misunderstandings, reduces disputes, and makes it possible to compare your value — not just your price — to other bids. The time you invest in writing a good bid pays you back many times over.