Estimating Best Practices · June 11, 2026
Subcontractor Bid Comparison: A GC Workflow That Scales
Comparing sub bids isn't a spreadsheet problem; it's a workflow problem. Here's the workflow senior GCs run, and how to set one up without buying new ERP.
Stage 1 — Invite
Send identical bid packages to a minimum of three qualified subs per trade. Keep package contents identical: plans, specs, addenda, and a one-page 'Required Inclusions' sheet that lists every must-include line.
Stage 2 — Intake
- Log every bid with a timestamp, total, and inclusions/exclusions summary.
- Reject ambiguous bids and ask for a clarified resubmittal — don't normalize the ambiguity yourself.
- Flag bids more than 15% below the cluster as suspect, not as a deal.
Stage 3 — Leveling
Run the leveling workflow from our bid leveling guide. Don't skip the risk-adjusted column.
Stage 4 — Award
- Choose by risk-adjusted total and trade record, not lowest base.
- Issue an award letter that explicitly attaches the leveled scope as the contract scope.
- Move losing bidders into a 'next project' list — they're future bids you've already qualified.
Why software helps here
A spreadsheet stops scaling around 6 trades or 10 bidders. Purpose-built sub bid comparison software (like BidScopePro) auto-aligns line items, surfaces scope gaps, and stores the leveling sheet as part of the award record.
Frequently asked questions
- How many subs should I invite per trade?
- At least three qualified bidders per trade. Fewer than three and you have no real comparison; more than five and intake quality drops faster than coverage improves.
- What if one sub bid comes in 30% under the others?
- Treat it as a red flag, not a deal. Ask for a clarified scope before accepting. The gap is almost always a missing exclusion or a misread spec.
- Do I need software to compare sub bids?
- Up to ~6 trades a spreadsheet works. Past that, purpose-built sub bid comparison software like BidScopePro saves hours and preserves the leveling sheet as part of the award record.