Short answer: To compare subcontractor bids apples to apples, measure every bid against the same scope sheet instead of against each other. For each bidder, record what is included, what is excluded and what is unclear, add a plug for every missing item, separate alternates and allowances from the base bid, and compare the leveled totals, not the quoted totals. AI bid leveling software such as Consight does this automatically from the proposal PDFs.
Key takeaways
- The lowest quoted bid is often the least complete. Compare leveled totals, not quoted totals.
- A scope sheet is the baseline. Without one, a scope item nobody priced stays invisible.
- Every exclusion needs a decision: plug it, carry it elsewhere or clarify it with the bidder.
- Keep alternates, allowances and unit prices out of the base bid comparison.
What does apples to apples mean in bid comparison?
Apples to apples means every bid covers the same scope, under the same assumptions, so the price difference reflects price and not missing work. Subcontractor proposals almost never arrive that way. One electrician includes fire alarm and another excludes it. One mechanical bid carries controls and another lists them by others. Leveling is the work of making those bids comparable.
How do you compare subcontractor bids step by step?
- Build the scope sheet. List every line item for the bid package from the drawings, specs and bid form, with quantities and units where they matter.
- Read every proposal in full. The base bid is on page one. The exclusions, qualifications and clarifications are usually on the last page.
- Mark each line for each bidder. Included, not included or needs review.
- Plug the gaps. For every line a bidder left out, add a plug from your estimate, another bidder’s price or historical cost.
- Separate alternates and allowances. Compare them on their own rows so they don’t distort the base bid.
- Normalize units and quantities. Unit-price trades such as earthwork and concrete need the same quantities to compare.
- Check addenda. Confirm every bidder acknowledged every addendum.
- Compare leveled totals and outliers. Look at the leveled total and flag bids that are far from your estimate in either direction.
What does a leveled comparison look like?
| Bidder A | Bidder B | Bidder C | |
|---|---|---|---|
| Quoted base bid | $4,820,000 | $4,670,000 | $4,910,000 |
| Controls | Included | Excluded, plug $85,000 | Included |
| Firestopping | Included | Excluded, plug $110,000 | Included |
| Allowance difference | None | Carried short, plug $75,000 | None |
| Leveled total | $4,820,000 | $4,940,000 | $4,910,000 |
Bidder B looked $150,000 cheaper than Bidder A. After leveling, it is $120,000 more expensive. This example is illustrative, but the pattern is common on large packages.
What are the most common mistakes?
- Comparing bids to each other instead of to the scope, so scope that nobody carried is missed.
- Reading the bid form and skipping the exclusions page.
- Rolling alternates into the base bid.
- Retyping numbers from PDFs into Excel and breaking formulas on bid day.
- Losing track of which revision of a bid is current.
How does software help compare subcontractor bids?
Consight reads every proposal (PDF, Excel or Word), maps each line to your scope sheet, marks included and not included items, and pulls out exclusions, alternates and qualifications, so the estimator can plug missing scope and compare fair totals. Every cell links to the proposal text behind it. Commercial GCs from $50M to $5B+ in revenue use it, including Clayco, Gray Construction, Alston Construction, W.M. Blanchard and NRP. See bid leveling software.
Frequently asked questions
What is the best way to compare subcontractor bids?
Compare every bid against one scope sheet, plug every missing item and compare leveled totals. AI bid leveling software such as Consight automates the reading and mapping. The estimator adds the plugs and makes the final call.
Is the lowest subcontractor bid the best bid?
Not necessarily. The lowest quoted bid often excludes scope. Compare the leveled total, the bidder’s qualifications and their coverage of high-risk items.
How do you handle exclusions in a bid comparison?
Add a plug for each exclusion, carry the work in another package or clarify it with the bidder before award. Read how to find scope gaps in subcontractor bids.
Where Consight fits
Consight is the preconstruction workspace built around this kind of work—from understanding project documents and building scopes to collecting bids, leveling proposals, reviewing risk, and documenting the final award.
Put it into practice on your next project.
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