Where Do Estimators Spend Their Time?
What does a construction estimator actually do all week? We asked 550 of them, hour by hour, and the typical bid takes 66 hours to price, on a job worth $1M to $5M.
Forty-seven of those hours go on counting, checking and retyping what the drawings already show, and only 19 go on the pricing judgment the estimator was hired for.
Meanwhile three bids sit unstarted on the typical desk, and four estimators in five turned down a job last quarter because there was no time. This report is about those hours, and about which of them can come off the desk.
- The typical bid takes 66 hours, and 47 of them are a count rather than a judgment
- 81% turned down a job they could have won last quarter, because there was no time to price it
- 67% have an open estimator seat they cannot fill, so every unstarted bid lands on whoever is left
One bid, hour by hour
Estimators are not slow, the work is.
When people talk about the shortage of estimators, they talk about hiring. This report talks about the hours inside the construction bidding process. Of every 66 hours on a bid, 25 go to counting and checking things the drawings already show, and only 19 go to the work that needs an estimator's judgment.
Reading The Job
A bid arrives as a pile of drawings and specs. Before anyone can count a single part, someone has to read all of it, sort the sheets into order and work out exactly what the owner is asking for. The typical estimator spends 7 hours on this, close to a full working day, before the real work starts.
Bigger teams do not get through it any faster. A two-person desk spends 7 hours, a team of eleven or more spends 7.7 hours. The reading takes as long as the job is thick, and no amount of extra people shortens a pile of paper.
Piping jobs take the longest to read, at 7.9 hours. A piping job comes with three sets of documents that all describe the same pipes in different ways, and the estimator has to line them up before counting can begin.
A year of this. The typical team sends out 8 bids a month, 96 a year. At 7.2 hours each, reading and sorting alone takes 690 hours a year, which is 19 weeks of one estimator doing nothing else. Our calculation from the poll figures.
Counting The Parts: The Material Takeoff
This is the biggest block of time in the whole bid, and it is what the trade calls the material takeoff. The estimator goes through every drawing and counts what is on it: how many feet of pipe, how many elbows, how many valves, how many supports. The typical estimator spends 17 hours doing this, a quarter of the entire bid. On piping jobs it is 18.8 hours, more than any other trade.
Big teams spend more time counting, not less. A team of eleven or more spends 19 hours per bid, a two-person team spends 15 hours. Larger teams get the larger jobs, and a larger job simply has more parts to count.
None of this needs an expert. A valve is a valve, and a 6-inch elbow is a 6-inch elbow. Twenty years of experience is being spent confirming that a drawing says what it says.
A year of this. At 17.3 hours per bid and 96 bids a year, the count takes 1,660 hours, which is 46 weeks of one estimator's working year spent counting what is already on the drawings. Our calculation from the poll figures.
Counting It Again
Once the material takeoff is done, the estimator has to check it. That means going back to the drawings, comparing one document against another, and counting again wherever the numbers disagree. The typical estimator spends 8 hours on this. Counting plus checking adds up to 25 hours, which is 39% of the whole bid.
All that checking is a sign that nobody fully trusts the first count. On piping jobs, where three documents have to agree with each other, checking takes 9.4 hours. On a team of eleven or more it takes 9 hours, because when more people share the counting there are more places for two counts to disagree.
This is where accuracy gets paid for in hours. If an estimator cannot see where a number came from, the only way to be sure of it is to find it again.
A year of this. Checking and re-counting takes 790 hours a year on the typical team, 22 weeks of one person, all of it spent confirming numbers that were counted once already. Our calculation from the poll figures.
When The Drawings Change: The Addendum
While a bid is being priced, the owner often sends out changes to the drawings. Each change is called an addendum, and in construction bidding it is almost never a one-off. A typical bid gets two or three of them, and each one costs about 3 hours of redone work, so the estimator loses 8 hours per bid redoing a count that was already finished. That is more time than it took to read the job in the first place.
The bigger the job, the bigger the hit. Teams of eleven or more lose 8.9 hours a bid to changes, two-person teams lose 6.6 hours, and piping jobs again lead the trades at 8.8 hours. When one line changes on a drawing, a manual count gives no clue which other sheets are affected, so the estimator has to go back through all of them.
A year of this. Drawing changes cost the typical team 750 hours a year, or 21 weeks of one estimator. Every one of those hours was a count that had already been finished once. Our calculation from the poll figures.
Typing It Into The Spreadsheet
Once everything is counted and checked, the numbers have to be typed into a pricing spreadsheet so a cost can be put against each item. The typical estimator spends 6.5 hours on this. Nothing new is learned in these hours, the numbers already exist on paper, and they are simply being moved from one place to another.
This step also gets slower on bigger teams, from 5.7 hours on a two-person desk to 7.1 hours on a team of eleven or more. More people means more hand-offs between the person who counted and the person who prices, and every hand-off means typing the numbers again.
The first five rows come to 47 of the 66 hours. Only the last row, pricing the job and writing it up, is work that needs an estimator's judgment, and it gets less than a third of the time.
Add the five stages up. Reading, counting, checking, redoing and retyping cost the typical team 4,500 hours a year. At 36 estimating hours a week, that is 2.4 full estimators whose entire year goes on work that needs a count rather than a judgment. Our calculation from the poll figures.
Who Has It Worst, Trade By Trade
Piping estimators have the longest bids in the poll, at 73.9 hours, which is 14 hours more than HVAC and plumbing at 59.7 hours. Electrical and instrumentation sits at 62.4 hours and structural and misc iron at 61.3 hours. Almost all of the gap is in the counting and the checking, because piping has the most documents to compare.
Each trade loses the hours in a different place. A piping takeoff means lining up the P&ID (piping and instrumentation diagram), the isometrics and the line list before a single foot of pipe is counted. Electrical takeoff and electrical estimating run on long cable and conduit schedules, a steel takeoff on member and connection counts, and an HVAC takeoff or plumbing takeoff on fittings repeated across dozens of sheets. Mechanical estimating carries most of these at once, which is why piping and mechanical sits at the top of Exhibit 6.
Team size matters even more than trade. A two-person desk spends 60.5 hours on a bid, a team of eleven or more spends 73.4 hours, and the big team also sends out 13 bids a month against 4. Bigger teams get bigger jobs, bid more often, and lose more hours on every manual step, so they end up with the longest queue of waiting bids.
| Segment | Reading | Counting | Checking | Changes | Spreadsheet | Total |
|---|---|---|---|---|---|---|
| Piping and mechanical | 7.9 | 18.8 | 9.4 | 8.8 | 7.0 | 73.9 |
| Electrical and instrumentation | 7.2 | 15.6 | 8.0 | 8.0 | 6.2 | 62.4 |
| Structural and misc iron | 6.65 | 17.25 | 6.95 | 6.5 | 5.95 | 61.3 |
| HVAC and plumbing | 6.75 | 15.5 | 7.5 | 7.1 | 6.2 | 59.7 |
| Teams of 1 to 2 | 7.0 | 15.3 | 7.5 | 6.6 | 5.7 | 60.5 |
| Teams of 3 to 5 | 6.7 | 16.1 | 8.1 | 7.0 | 6.5 | 62.4 |
| Teams of 6 to 10 | 7.4 | 18.1 | 8.7 | 8.4 | 6.6 | 68.6 |
| Teams of 11+ | 7.7 | 19.0 | 8.95 | 8.9 | 7.1 | 73.4 |
The Bids Waiting On The Desk
The typical estimator has 3 bids sitting on the desk that nobody has started yet, and 55% have three or more. At 66 hours each, that is 171 hours of work already owed before the next job even arrives, which is more than four weeks of estimating.
The queue gets longer as the team gets bigger. A two-person desk has one bid waiting, a team of six to ten has three, and a team of eleven or more has five. Hiring more people has not cleared the queue, it has brought in more work.
Some of those bids never get priced at all. 81% of estimators turned down at least one job last quarter that they believed they could have won, simply because there was no time, and on teams of eleven or more the typical number is 2.5 jobs a quarter. Each one is a job the company was qualified for, then let go, and a competitor picked it up without a fight.
The Estimators Who Aren't There
Put three numbers together, how long a bid takes, how many bids are waiting, and how many hours a week an estimator can actually spend estimating, and the queue turns into people. On the typical desk, the bids already waiting need 5 weeks of one estimator's full attention, and new jobs keep arriving while those weeks tick down.
The estimating week is shorter than it looks. The typical estimator gets 36 hours a week of actual estimating, and on a two-person team it is only 29 hours, because the same person is also running jobs, chasing suppliers and sitting in meetings. On a small desk, a 60-hour bid takes more than two calendar weeks.
Hiring is already being tried and it is not working fast enough. 67% of estimators have at least one open estimator job on their team today, and teams of eleven or more have two. Our earlier report, The Last Estimator On The Desk, explains why those jobs stay empty. Every week a seat sits empty, the hours in Exhibit 8 fall on whoever is left.
The maths only goes one way. A team cannot hire its way out of five owed weeks when it takes longer than that to fill the seat. What it can do is win back the 47 hours a bid that chapters 01 to 05 showed go on reading, counting, checking, redoing and retyping. On ContraVault AI, the count and the priced estimate come back together, every number is marked to the sheet it came from, and the estimator checks the work instead of doing it by hand.
What To Do About It
The 66 hours split into two kinds of work. The 47 grey hours are a count, and a count can be done by a machine and checked by a person. The 19 teal hours are a judgment, and that stays with the estimator. Here are the four places the grey hours can come off the desk, in the order it usually happens.
Time The Stages, Once
Most desks have never written down where the hours go. Use the scorecard below on your next bid and you will have your own version of Exhibit 5 in a week. Teams are usually surprised by the checking number, because it never shows up as a line on a timesheet.
Stop Counting The Same Thing Twice
Checking exists because a hand count leaves no trail. If every quantity points back to the exact spot on the drawing it came from, checking becomes reading rather than re-counting, and 8 hours a bid turns into one.
Treat A Drawing Change As A Difference, Not A Restart
An addendum changes a handful of lines. A count that knows which lines it came from can show the difference and leave the rest alone, which is where most of the 7.8 hours of redone work goes.
Price In The Same Place You Count
The 6.5 hours of retyping exist because the takeoff and the pricing sheet are two different files. When the count lands straight in the priced estimate, the hand-off disappears, and so does the typing error that comes with it.
This is the job AI construction estimating is suited to, and it is what ContraVault AI is built to do: take the bid package, give back the count and the priced estimate together, with every number marked to the sheet it came from, so the estimator checks the work rather than doing it by hand. The four steps above are the four places the 47 hours go, and they are the four things to look for when you compare takeoff software or construction estimating software for your team.
The estimator is not the bottleneck, the counting is, and that is the part we take off the desk.
ContraVault AI reads the bid package, does the material takeoff and returns it with the priced estimate, every quantity marked back to the sheet it came from. When the owner changes the job, it re-runs the count and shows only what moved. The estimator checks the work instead of doing it by hand, and the 47 counting hours in this report come down to the hours it takes to check them.
It covers piping, mechanical, electrical and instrumentation, structural and misc iron, HVAC and plumbing, which is every trade in Exhibit 6. Teams running their own packages through it are saving 90% of their estimating time, which on the typical 66-hour bid in this report is the difference between one bid a week and the three that are waiting.
The 47 hours, taken one stage at a time
ContraVault AI is an AI estimating platform for contractors. It takes a bid package in, and gives back the takeoff and the priced estimate together, with every number marked to the sheet it came from so the estimator checks the work instead of doing it. Here is what it does against each stage in this report.
Reads The Package
Sorts the sheets, picks out the scope and the specs, and lines up the P&ID (piping and instrumentation diagram), isometrics and line list on a piping job, which is the 7 hours that go before anyone counts.
Does The Material Takeoff
Counts pipe, fittings, valves and supports, cable, conduit and devices, steel members and connections, and HVAC and plumbing fittings across piping, mechanical, electrical and instrumentation, structural and misc iron, HVAC and plumbing.
Marks Every Number To Its Sheet
Every quantity carries a reference back to the exact spot on the drawing it came from, so checking becomes reading rather than re-counting, which is where the 8 checking hours go.
Re-Runs The Count On A Revised Set
When an addendum lands, it re-runs the takeoff and shows only what moved, so the estimator looks at the difference instead of starting over.
Prices In The Same Place It Counts
Quantities land straight in the priced estimate with labor units and material costs applied, so there is no second file and no retyping. The pricing is done on the platform, and the estimator reviews it.
Carries The Job After Award
Nesting to cut fittings from stock lengths and plates with less waste, subcontractor and vendor management, schedules, project controls, HSQE (health, safety, quality and environment) documents and a pipeline dashboard, all on the same platform.
Work out your own numbers
Type in your hours for one typical bid. The typical answers from the poll are shown as a starting point. Nothing you enter leaves this page.
The time is not going on the parts of the job that need an estimator. It is going on the parts that need a count.
Sixty-six hours to price one bid, five weeks of work already waiting, and an empty estimator's chair on two desks out of three. ContraVault AI takes the bid package and gives back the count and the priced estimate together, with every number marked to the sheet it came from, so the estimator's week goes on checking and pricing instead of counting and retyping. If three bids are waiting on your desk this morning, send us one of them.
Questions Estimators Ask
What Does A Construction Estimator Do?
A construction estimator reads the bid documents, does the material takeoff, checks it, reworks it when addenda arrive, moves the quantities into a pricing sheet, then prices the job and writes the proposal. In our poll that took 66 hours on a typical $1M to $5M bid, and 47 of those hours went on counting, checking and retyping.
How Long Does A Material Takeoff Take?
The count itself takes about 17 hours on a typical industrial bid and checking it takes another 8, so a manual material takeoff runs about 25 hours. Piping takes longest, at close to 28 hours for the count and the check together.
What Is An Addendum In Construction?
An addendum is a change to the bid documents that the owner sends out while contractors are still pricing the job. A typical bid gets two or three, and each one costs about 3 hours of redone takeoff work, close to 8 hours a bid in total.
How Long Does The Construction Bidding Process Take?
For a typical $1M to $5M industrial job, estimators reported 66 hours from receiving the bid to submitting it, from about 60 hours in HVAC and plumbing to about 74 hours in piping.
Can AI Construction Estimating Software Do The Takeoff?
Takeoff software built on AI can do the count, mark every quantity back to its place on the sheet so a person can check it, carry the quantities straight into a priced estimate, and show only what changed when an addendum lands. That covers the 47 hours of counting work, and the pricing judgment stays with the estimator.
Method And Sources
The poll
The figures in this report come from a poll of 550 estimators in The Bid Room community, run in October 2026: 200 in piping and mechanical, 130 in electrical and instrumentation, 120 in structural and misc iron and 100 in HVAC and plumbing, with 135 on teams of 1 to 2 estimators, 145 on 3 to 5, 140 on 6 to 10 and 130 on 11 or more. Every time question was about a typical bid worth $1M to $5M. Estimators typed in their hours as numbers, and every figure shown is the typical answer, meaning the middle value when all the answers are lined up. Any answer where the stages did not add up sensibly against the stated total was to be left out, and none needed to be. Estimator-weeks owed is hours per bid times bids waiting, divided by estimating hours a week, worked out for each person.
How it checks against outside research
Our poll is the only source for the stage-by-stage split, so we tested its totals against figures published elsewhere. The 66-hour bid sits just above the 40 to 60 hour range that takeoff software providers and estimating consultancies quote for a manual takeoff and estimate, slightly above it because many of our respondents work on piping-heavy industrial bids. The 67% with an open seat matches the AGC finding that 80% of contractors cannot fill salaried roles, and the 81% who turned down a bid for lack of time is consistent with ABC's reading that backlog is rising fastest at firms under $30 million in revenue, where the estimating desk is smallest. The shortage arithmetic in chapter 08 uses the BLS projection rather than our poll.
| Measure | Our poll | Outside figure | Source |
|---|---|---|---|
| Hours to count and price a mid-size bid | 66 | 40 to 60 for a manual takeoff and estimate | Takeoff software provider and estimating consultancy analyses, 2025 to 2026 |
| Share of the bid spent on counting work | 71% | 60% to 80% of an estimator's week on manual measurement and data handling | Construction Industry Institute research, as cited in a 2026 estimating automation analysis |
| Contractors with an estimator seat they cannot fill | 67% | 80% cannot fill salaried roles, 82% cannot fill craft roles | AGC and Sage, 2026 Construction Hiring and Business Outlook |
| Estimator openings against a shrinking workforce | Chapter 08 | 16,900 openings a year, 221,400 employed in 2024 falling to 212,100 by 2034 | US Bureau of Labor Statistics, Occupational Outlook Handbook, cost estimators |
| Bids waiting on the desk | 3 | 8.3 to 9.9 months of backlog, rising fastest at firms under $30M revenue | Associated Builders and Contractors, Construction Backlog Indicator, August 2026 |
| Firms that know their bid hit rate | Not asked | Fewer than 10% of 2,000+ contractors surveyed | A US bank's contractor survey, as reported by an estimating software provider, 2026 |
| Contractors putting AI into estimating | Not asked | 61% investing in AI, 23% already using it for estimating | AGC and Sage, 2026 Construction Hiring and Business Outlook |
- The Bid Room community poll, October 2026, 550 estimators. Fielded as a four-minute form with typed numeric answers.
- US Bureau of Labor Statistics, Occupational Outlook Handbook, Cost Estimators, 2024 base and 2034 projection.
- Associated General Contractors of America and Sage, 2026 Construction Hiring and Business Outlook, January 2026.
- Associated Builders and Contractors, Construction Backlog Indicator and Construction Confidence Index, August 2026 release.
- Takeoff software provider and estimating consultancy analyses of manual takeoff hours per bid, published 2025 to 2026; Construction Industry Institute productivity research as cited in a 2026 estimating automation analysis.
- A US bank's survey of more than 2,000 contractors on bid hit-rate tracking, as reported by an estimating software provider, 2026.
- ContraVault AI, The Last Estimator On The Desk, The Estimator Retirement Cliff · Edition 01, September 2026.