Estimating

What is a bid tabulation in construction?

A bid tabulation, or bid tab, is a side-by-side table of every bid received on a project, showing base bids, alternates, and unit prices so the owner can compare them and identify the apparent low bidder.

Two construction professionals review paper plans beside a tablet at a jobsite workbench.
Plan reviews connect field conditions, drawings, and the next decisions on a job. AI-generated illustration.

A bid tabulation is the summary sheet made after bids are opened. Each bidder gets a column or row with its base bid, alternate prices, unit prices, and whether it met requirements such as bid security and addenda acknowledgment. Public owners usually publish bid tabs after opening, which makes them one of the best free sources of market pricing a contractor can find.

General contractors use the same idea internally when comparing subcontractor quotes. That internal version is usually called bid leveling, and it is more involved, because sub quotes rarely cover the same scope.

How bid tabulation works on public jobs

On federal sealed bid work, FAR 14.402-1 says the bid opening officer publicly opens all bids received before the deadline and, if practical, reads them aloud to the people present, and the bids are then recorded. FAR 14.403 requires the abstract of offers to be completed and certified for accuracy by the opening officer as soon as practicable after opening, and says abstracts for unclassified acquisitions are available for public inspection. State and local agencies have their own rules, but most publish results in some form.

Here is a simplified tab for a city parking lot reconstruction:

Example bid tabulation
BidderBase bidAlt 1 (add LED lighting)Unit price: extra base rock per tonBond and addenda
Bidder A$1,184,000$62,000$38Yes
Bidder B$1,226,500$48,500$31Yes
Bidder C$1,139,900$71,000$44Missing Addendum 3
Bidder D$1,297,000$55,000$35Yes

Bidder C is the lowest number, but the missing addendum may make the bid nonresponsive. If the city accepts Alternate 1, Bidder A's total is $1,246,000 and Bidder B's is $1,275,000, so the ranking among the remaining bidders holds. Bid documents state how alternates are considered in determining the low bidder, so read that section.

How contractors use bid tabs

  • Check your pricing. If you were 15 percent high on paving and close on everything else, look at your paving productivity and material quotes.
  • Learn the competition. Over a dozen tabs you will see who bids which owners and how tight they go.
  • Spread analysis. A wide gap between low and second bidder can signal a scope miss by the low bidder.
  • Track your hit ratio. Record every tab, your rank, and your percent over low. See how to calculate a bid hit ratio.
  • Feed your estimating database. Unit prices from tabs are real market numbers for your area.

Common mistakes

  1. Reading the tab as final. The apparent low bidder is not the award until responsiveness and responsibility are confirmed.
  2. Ignoring alternates when comparing totals.
  3. Not saving tabs. They take minutes to log and are worth years of pricing history.
  4. Treating one tab as the market. One job's results can be skewed by a bidder who was hungry that month.

Related terms

See sealed bid, bid form, award, responsive bidder, and the bid leveling template. Read how to decide which construction jobs to bid to put bid tabs to work. Smart Business Automator keeps estimates and project history together, so the numbers from past bids are easy to find. See estimate to project handoff automation.

Frequently asked questions

Where can I find bid tabulations?

Public owners often post them on their procurement or bid portal after opening. You can also attend public bid openings or request them under public records rules.

Is the lowest bid on the tab the winner?

Not automatically. The owner checks whether the bid is responsive and the bidder is responsible before awarding. Alternates may also affect the ranking.

What is the difference between a bid tabulation and bid leveling?

A bid tabulation lists bids as submitted. Bid leveling adjusts subcontractor quotes for scope gaps and exclusions so they can be compared fairly.

Are federal bid results public?

For federal sealed bids, FAR 14.403 says abstracts of offers for unclassified acquisitions are available for public inspection.

Sources

  1. Acquisition.gov: FAR 14.402-1, Unclassified bids
  2. Acquisition.gov: FAR 14.403, Recording of bids
Written and edited by

Maurice Francois writes and edits construction operations guides for Smart Business Automator. More from Maurice on the Scaling Legends podcast.

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