The Cost of a Lost Bid: Counting the Estimating Hours You Never Get Paid For

How much a lost bid costs an MEP contractor, counted in estimator hours on a simple worksheet, so the owner sees the cost without any promised savings.

Written by the Miriad team with AI assistance. Figures link to their sources; the worksheet is ours and contains no assumed values. Updated 2026-10-21.

TL;DR: A lost bid costs an MEP contractor the estimating hours that went into it, plus the site walks, supplier time and management time around it, and none of it is paid. Count it in hours first, stage by stage, then multiply by your own loaded hourly cost. The point is not a saving target. It is knowing what a bid costs before you decide to price it.

Every mechanical contractor knows that bidding is unpaid work. Very few know how much. Ask the owner of a 25-person plumbing and heating firm what their last lost bid cost, and the honest answer is usually a shrug and "a few days of the estimator's time". That is a real cost, just never written down, so it never competes with anything else. This article is part of our guide on how an MEP contractor can use AI to win more bids, and gives you a worksheet to make the number visible.

What does a lost bid actually cost an MEP contractor?

It costs every hour spent on it by people you pay: estimators, the owner or project manager reviewing it, the technician who joined the site walk, and the office staff who chased quotes and assembled the proposal. On a lost bid, all of those hours are overhead. The cost is real even when nobody invoices it.

The hours are only part of it. A lost bid also has an opportunity cost: the estimator who spent three days on it did not spend them on a bid you could have won, or on the change orders and submittals of a live job. That second cost is harder to count, but it is often larger, because estimating capacity is hard to add.

How hard is shown by AGC's 2025 workforce survey of firms with $50.1 million to $500 million in revenue: 75% of firms with estimating openings reported difficulty filling them (AGC, 2025). Nationally, 92% of construction firms report difficulty hiring (NCCER with AGC, 2025). When you cannot buy more estimating hours, the ones you have carry a price higher than their payroll cost.

Which hours go into a bid?

Hours go into eight stages: reading the bid package, the go/no-go, the site walk, the takeoff, supplier and subcontractor quotes, pricing and labour, the proposal, and follow-up. Count each one separately, because they belong to different people and because AI changes some of them and not others. Leave a column for each person involved.

The worksheet below has no numbers in it on purpose. Fill it from your last few bids, using calendars, emails and the estimator's memory.

Stage Who Hours (fill in) Hourly cost (your figure) Stage cost
Reading the bid package and addenda Estimator ___ ___ ___
Go/no-go decision Owner / senior estimator ___ ___ ___
Site walk Estimator, technician or supervisor ___ ___ ___
Takeoff Estimator ___ ___ ___
Supplier and subcontractor quotes Estimator, office ___ ___ ___
Pricing and labour allowance Senior estimator ___ ___ ___
Proposal, exclusions and clarifications Estimator, owner review ___ ___ ___
Follow-up and questions from the GC Estimator ___ ___ ___
Total per bid ___ ___

Fill it for bids you won and bids you lost. If the lost ones used noticeably more hours, you have found something worth a conversation.

How do you put a cost on an estimator hour?

Use your own loaded cost: wages plus payroll taxes, benefits, vehicle and software, divided by the hours actually worked. Do not use a national average. National figures describe a whole occupation across very different firms and regions, and they say nothing about what your senior estimator costs your business.

To see why, look at the closest published figure. The US Bureau of Labor Statistics gives a median pay of $61,010 in May 2025 for HVAC mechanics and installers (BLS, 2026). That is a technician figure, before overheads, for the whole country. It might be a reasonable cross-check for the technician on a site walk. It tells you nothing about an estimator in your city.

Your bookkeeper can give you a loaded hourly cost per role in an afternoon. Put that in the worksheet, and keep it private: it is internal data, not a number for a proposal.

Example: filling in the worksheet for one lost bid

The first filled worksheet rarely shows a slow estimator. More often it shows hours lost in handling: quote requests sent twice, a proposal rebuilt from nothing, a site walk repeated because nobody wrote down what was seen. Filling it for a won bid next to a lost one makes the difference visible.

Example (illustrative, not a real case): The owner of a plumbing and heating firm fills in the worksheet for a lost bid on a school washroom refurbishment. He finds that the takeoff and pricing were close to what he expected, but two stages were not. The supplier quotes took far longer than the estimator remembered, because one wholesaler quoted the wrong pipe system and the request had to be re-sent. And the proposal was rebuilt from scratch because the last similar job was saved under a project number nobody remembered.

He then fills it for a won bid of similar size. The won bid used fewer hours mainly because the GC sent a clean bid package and the supplier quotes came back first time. The lesson is not about the estimator's speed. It is that the expensive hours sat in handling: re-sent quote requests and a missing template.

The owner's two decisions: a standard quote request sheet that names the pipe system and spec section, and a proposal template stored in one place. Neither needs AI. Both reduce hours on every future bid, won or lost.

What does the number tell you to do?

The cost per bid gives you three decisions: which bids to decline, which stages to fix, and how much handling to hand to AI. A bid with a low chance of award and a high cost should usually be declined. A stage with many hours and little judgement needs a template or an AI draft.

Multiply your cost per bid by the bids you lost last year, and you have the annual cost of losing. That number is not a target to cut by a fixed percentage. It is a reason to write go/no-go rules, as described in raising your bid win rate, and to stop pricing for GCs who never award to you.

How does AI change the worksheet?

AI shortens some lines and leaves others untouched. It can reduce the reading, quote comparison, proposal drafting and follow-up lines, because those are mostly text handling. It does not change the site walk, the takeoff or the pricing judgement. And it adds a new line: the time to check its output.

Fill the worksheet again after a few bids with AI in use, and compare. We do not publish a typical saving, because it depends on how organised your quotes, templates and pricing history are. The Dodge Construction Network and CMiC research found that only 26% of contractors say their data is in good shape (Roads & Bridges, 2025), and messy data is exactly what makes the checking line grow.

If the worksheet shows that most hours go into knowledge only one person has, start with capturing estimating knowledge before it leaves. Our Business Brain Starter Kit, a workbook and a chain of prompts that turn company knowledge into plain files with a source next to each line, is in preparation for exactly that. Get notified when it launches. The full bid cycle is in the MEP contractor guide to AI and bids.

FAQ

How do I estimate the hours spent on past bids?

Use what already exists: calendar entries for site walks and meetings, email timestamps for quote requests and the proposal, and the estimator's own estimate for takeoff and pricing. The first worksheet will be rough. From the next bid onwards, ask the estimator to note hours per stage in the bid log as they go; a rough log kept consistently is more useful than a precise one kept once.

Should the cost of bidding go into our overhead rate?

Yes, in most firms bidding is part of overhead, and your rates should cover it across the jobs you win. The worksheet does not replace that. It shows how the cost is distributed across stages and bid types, so you can decide which bids to decline and which stages to fix, instead of only raising overhead.

Is it worth bidding on a job just to stay on a GC's list?

Sometimes, but count it as a marketing cost and decide it deliberately. If the worksheet shows a typical bid costs a substantial number of estimator hours, a courtesy bid is an expensive way to stay visible. A polite decline with a clear reason, such as no capacity in that period, often keeps the relationship at a fraction of the cost.

Will AI make bidding free?

No. AI can shorten text-heavy stages such as reading the bid package, comparing supplier quotes and drafting the proposal, but the site walk, the takeoff and the pricing judgement still take an estimator's time, and checking AI output takes time too. Measure the worksheet before and after, on your own bids, rather than assuming a saving.

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