The external research line of a commercial diligence is priced by scope: single-market work costs a fraction of multi-market, and screen difficulty drives more of the variance than interview count does.
What does a CDD workstream cover?
Market sizing and growth, competitive position, customer and channel verification — often through a survey of the buyer population — and the specific hypotheses in the investment thesis. The research component supplies primary evidence for each.
The scope varies enough between advisory firms that comparing costs requires normalizing what is included, which is rarely done in a benchmarking conversation.
What is included varies more than the label suggests. Some scopes carry the primary research inside the fee, others quote the advisory work and bill research at cost, and a few exclude customer contact entirely because the process does not permit it. A cost that looks low frequently reflects a scope that stops before the evidence starts, which is the first thing to establish in any comparison.
What does the research line cost?
Less than most people assume as a share of total diligence cost, and more than most budgets allow for when the screen is narrow. It is the line most often set by analogy to the last deal rather than by the current screen.
The figure worth carrying is per workstream rather than per call, because that is the unit a practice actually commissions.
Setting it by analogy fails in a specific way. The last deal's research line encodes the last deal's screen, and screen difficulty has the widest range of any variable in the workstream. Two deals of identical size in the same sector can differ several-fold on this line purely because one asks for a role thousands of people have held and the other asks for one that a few dozen have.
What drives the number up?
Screen difficulty, first. Finding twenty people who match a narrow operational profile costs more than finding sixty who match a broad one, and the ratio is not close — which is what moves the per-deal expert line.
Geography count is second, and it compounds with the first: a narrow screen replicated across three markets is three narrow screens, not one with a wider net.
Recency compounds both. A screen requiring someone operational within the last eighteen months is narrower than the same screen without the recency clause, and recency is usually the clause a deal team is least willing to drop, because it is the one making the evidence current. Scoping conversations that treat it as negotiable tend to be the ones that end with stale answers.
Where does throughput actually bind?
In recruitment, almost always. Adding researchers does not compress a timeline when the constraint is how many qualifying people exist and will speak within the window.
Practices that staff for analysis and buy in recruitment tend to run smoother programs than those that do the reverse.
The practical consequence is that the schedule should be built backward from the screen rather than forward from the kick-off. Establish what the screen will support in the window available, agree a band, and staff the analysis to it. Programs that fix the interview count first and discover the constraint at the two-week mark lose the time they were trying to protect.
Build the capacity or buy it?
Buy for peaks and build for baseline. A practice staffed to peak demand carries idle capacity between deals; one that buys everything loses the sector familiarity that makes each subsequent screen faster.
The familiarity effect is real and compounding, which is the argument against outsourcing a sector you intend to keep working in.
Where a practice does buy, the screen is the part not to outsource. The definition of who counts as an expert is where the sector knowledge lives, and it is also the cheapest part of the work to keep in house. A practice that writes its own screens and buys the recruitment against them keeps the compounding advantage and still gets the capacity.