What bidding costs you, and why bidding less can earn more
At one win in five, every job you take has already absorbed the cost of four you did not.
The short answer
Every bid you lose is a cost carried by the jobs you win. At a one in five win rate, the estimating cost of five bids has to be recovered from one job, and if that is not in your overhead it is coming out of your margin without appearing anywhere.
The formula
cost per bid = estimating hours x cost per billable hour
bids per win = 1 / win rate
estimating cost per won job = cost per bid x bids per win
as a share of revenue = estimating cost per won job / average job value
Estimating hours are billable hours you did not bill. Costing them at the wage understates the figure by the same forty percent as everywhere else.
Worked example
Six hours per bid at a $46.42 cost per billable hour, a one in five win rate, and an average job of $42,000:
cost per bid = 6 x 46.42 = 278.52
bids per win = 5 → cost per won job = 1,392.60
as a share of revenue = 1,392.60 / 42,000 = 3.3%
at a 1 in 3 win rate: 3 x 278.52 = 835.56
saving per won job = 557.04
Moving from one win in five to one in three is worth $557 on every job, and it comes from bidding less rather than working more.
Why a higher win rate usually means fewer bids
The fastest way to raise a win rate is to stop bidding work you were never going to win: the jobs where you are the fourth quote, where the client is price-shopping, where the scope is undefined.
That feels like turning down opportunity and it is the opposite. Six hours not spent on a bid you lose is six hours available for one you might win, or for the job you are already running.
It also improves the bids you do submit, because the time goes somewhere. A considered quote from someone who understood the job wins more often than a fast one, and you can only write considered quotes if you write fewer.
The questions that qualify a bid in two minutes
How many others are quoting, and how did they find you. A referral where you are the only quote and a portal lead with five bidders are different businesses.
Is the scope written down, and is there a budget. A client who will not name a budget usually has one, and quoting blind into it wastes everyone's time.
When do they want to start. A start date beyond your visibility is not a job yet, it is a conversation.
None of these are rude to ask and all of them are cheaper to ask than to discover.
When to charge for estimating
For detailed design or measured surveys on complex work, charging is normal and it qualifies the client immediately. Crediting the fee against the job if you win removes most of the objection.
For ordinary competitive quoting it is usually not viable, and the honest response is to make the estimate proportionate. A two hour quote on a job you have a one in five chance of winning is a better economic decision than a six hour one.
What this leaves out
- Assumes estimating time is genuinely unbillable. Some contract types allow recovery of design and estimating costs.
- Excludes the cost of winning the wrong job, which is larger than any bidding cost and does not appear in this arithmetic.
- Win rates vary hugely by sector and lead source. One in five is common for competitive small works and poor for referral-led businesses.
This arithmetic is free to run in your browser — no signup, nothing held back.
Open the free calculatorCommon questions
- What is a good win rate for construction bids?
- It depends entirely on lead source. One in five is normal for open competitive tendering and would be poor for a referral-led business, where one in two is achievable. The number worth tracking is your own, by source.
- Should estimating cost go in overhead or in the job?
- In overhead, because you cannot attribute four lost bids to the one job that paid for them. What matters is that it is somewhere: an overhead percentage that omits estimating understates your true cost of doing business.
- How do I turn down work without losing the relationship?
- Answer quickly and say why, then recommend someone if you can. A fast no is respected far more than a slow quote priced high enough that you hope to lose, which most clients recognise anyway.
Spreadsheets that do this
The formulas above, already built and checked — so you fill in your numbers rather than the arithmetic.
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Last reviewed 22 August 2026