Consulting firms answer 229 RFPs a year, and the lost ones never reach CAC

Ask a law firm, audit practice or consultancy what it costs to win a new client and you will usually get a number built from the marketing budget: events, directory listings, sponsorships, the website and the CRMCRMCustomer Relationship Management: software and strategy to manage and analyse customer interactions throughout their lifecycle.View full definition → licence, divided by new clients opened. That number is too low by a multiple, and most partners suspect it. The biggest costs of winning a client never pass through marketing's P&L. They include the partner hours spent courting a general counsel for a year and a half, the proposal team writing responses that lose, scoping work done at risk, and pursuits that die at the conflict check or the anti-money-laundering file after months of effort.

The argument of this piece is simple. In professional services, true client acquisition costacquisition costCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition → is a cohort number. You build it from partner revenue the firm gave up and from write-offs on lost pursuits, and you measure it over the whole sales cycle. A CMO who keeps reporting the cash-only, calendar-year version is steering the firm's growth spend with the wrong instrument.

Why loaded acquisition cost is a CMO problem in partnership firms

In most professional services firms, partner time is the scarcest thing spent on growth, and it is the cost nobody reports. Hinge, a marketing agency that sells to professional services firms, found in its 2026 High Growth Study that leads from referrals and direct human outreach account for nearly two-thirds of all new business. Read that as an accountant would. If two-thirds of new work arrives through channels whose main cost is a partner's calendar, then a CACCACCustomer Acquisition Cost (CAC) is the total sales and marketing spend divided by the number of new customers gained in a period. It measures how efficiently you grow.View full definition → built from marketing cash measures the minority channel and ignores the majority.

The blind spot has a budget consequence. Thomson Reuters' Law Firm Financial Index for Q2 2026 reports that direct expenses rose 8.3% and overhead costs increased 7.7%, the largest growth figures for both since 2024. Marketing sits in overhead, which the Index defines as everything outside fee-earner pay, including occupancy costs, administrative and staff compensation and benefits, technology costs, business development expenses, and more. Partner pursuit time is hidden inside compensation. When a managing partner looks for cuts, the marketing line looks expensive per client and partner-led pursuit looks free. Both impressionsimpressionsThe total number of times an ad or piece of content is displayed, regardless of clicks. Each display counts as one impression, even to the same person.View full definition → are wrong, and only the CMO is placed to correct them.

Bid discipline is also slipping. According to Loopio's 2026 benchmark (Loopio sells RFP response software, so treat its figures as directional), the average organization responds to 166 RFPs a year, spends 33 hours on each, and wins 39% of them, and Management Consulting firms leading at 229 a year. The same report says teams sticking to go/no-go decision criteria dropped to 75%, an 8-point decrease from 2024. More bids with less qualification means more write-offs, and none of them show up in a cash-only CAC.

How do you load partner time into client acquisition cost?

Take each pursuit hour, multiply it by the realized rate that hour would have earned, multiply again by the probability that it would actually have been billed, and charge the result to the pursuit. Each part of that sentence matters.

Price displaced revenue, not salary

SaaS CAC guides allocate salary. One standard example has a rep on a $100,000 base salary split 70/30 between new and existing customers, so it makes sense to allocate only $70K of the base salary. That method breaks in a partnership. Equity partners have no salary in the relevant sense. Their cost to the firm is the fee income they would otherwise have produced. So use therealized rate rather than the rack rate: the rate left after discounts and write-downs. Pricing pursuit hours at the rate card overstates the cost of every pitch.

Then apply a displacement factor, because not every pursuit hour pushes out a billable one. SPI Research's 2026 benchmark, sponsored by professional services automation vendors including Deltek, found billable utilization fell to 66.4%, its lowest point in SPI's survey history, and well below the 75% threshold SPI considers optimal. In a practice with that much slack, many pitch hours come out of idle capacity and displace little. In a practice running at full capacity, every pitch hour is a billed hour lost. A single firm-wide factor hides that difference, so set it practice by practice.

The raw data exists more often than CMOs assume. According to LeanLaw, which sells law firm billing software, Wilson Sonsini, for example, counts up to 100 hours of business development activities toward billable targets. It adds that Sidley gives 50 hours of credit for writing articles and thought leadership. White & Case provides 200 hours of credit for pro bono, business development, and DEI initiatives. At King & Spalding, associates must reachreachThe number of unique people exposed to your message in a given period. Unlike impressions, reach counts each person once, no matter how often they see it.View full definition → 2,400 "productive hours" a year to remain in "good standing" at the firm, while 1,950 is still the billable hour requirement for bonus eligibility. Once a firm gives credit for business development time, that time gets recorded. The only missing step is recording it against a specific pursuit instead of a generic "BD" code.

Pursuit write-offs: the losing bids belong to the wins

Every signed engagement letter carries the cost of the pursuits that lost. At Loopio's 39% win rate, each win comes with about one and a half losing responses. Professional services adds write-off categories that other industries don't have. One is diagnostic or scoping work done at risk. Another is a pursuit killed late by a conflict search, or by auditor independence rules that bar the firm from selling certain services to an audit client. A third is the prospect that fails client due diligence under anti-money-laundering rules after a partner has spent months on the relationship. All of these belong in the cohort's cost, because they are what it costs to run the process.

UK audit tendering shows what happens when write-offs get large enough. In 2013 PwC estimated that £44m is already being spent every year because more tenders have been taking place under the FRC's ten-year tendering regime. That figure is now more than a decade old, but the effect it predicted showed up. In 2019 the House of Commons business committee found that challenger firms are often reluctant to tender for FTSE 350 audits because of high tender costs, and their limited success. Pursuit write-offs ended up deciding which firms could compete for which clients. The same arithmetic decides which markets your firm can afford to enter.

Measure the cohort across 18 months, not the calendar year

With an 18-month cycle, calendar-year CAC divides this year's spend by wins that were seeded last year. A firm that is expanding its pursuit effort sees CAC jump, even though nothing has gone wrong yet. A firm that cuts pursuit spending sees CAC look excellent for a year and a half while its pipelinepipelineAll active sales opportunities across the stages of the sales process, together with their combined potential value and probability of closing.View full definition → dries up. The fix is to tag every pursuit opened in a given quarter, accumulate its costs until it closes or is formally declared dead, and divide by the engagement letters signed from that cohort. Count a client as won when the engagement letter is signed and the conflict and KYC checks are cleared. A verbal yes doesn't count. On this method, the first complete reading on a Q1 2025 cohort arrives around now.

Worked example (hypothetical, arithmetic only)

Suppose a practice opens 20 pursuits in Q1 2025. The inputs are illustrative:

• Attributable marketing cash: $150,000.
• Proposal staff: 33 hours per pursuit (Loopio's average) at a loaded $120 an hour, so 20 × 33 × $120 = $79,200.
• Partner time: 50 hours per pursuit, so 1,000 hours, at an $800 realized rate with a 50% displacement factor: $400,000.
• At-risk scoping work written off on three lost pursuits at $30,000 each: $90,000.
• Outcome by Q3 2026: 8 engagement letters signed, a 40% win rate.

Marketing-only CAC is $150,000 ÷ 8 = $18,750. Cohort-loaded CAC is $719,200 ÷ 8 = $89,900, about 4.8 times higher. Most of the gap comes from partner time.

The cohort-loaded CAC rule for the whiteboard

True CAC = (cash spend + pursuit hours × realized rate × displacement % + pursuit write-offs) ÷ engagement letters signed by that cohort.

Use it alongside a go/no-go rule:pursue only if win probability × first-engagement contribution margin is greater than the pursuit's loaded cost. In the hypothetical above, the non-cash cost per pursuit is $569,200 ÷ 20 = $28,460. At a 40% win probability, the first engagement has to earn more than $71,150 in contribution margin before the bid pays for itself. Panel appointments and audit wins often lose money in year one and pay off over a decade. For those, replace first-engagement margin with alifetime valuelifetime valueLifetime Value: the total revenue (or profit) a customer generates throughout their entire relationship with your business.View full definition → estimate built for irregular engagements, and write down the assumption so the partner sponsoring the bid owns it.

When cohort-loaded CAC helps and when it misleads

The number earns its place in four situations: comparing channels (events against partner-led pursuit against formal RFPs), setting a go/no-go policy, defending the marketing budget when overhead is being cut, and pricing a bid where the incumbent has years of sunk relationship cost and you don't.

It misleads in other situations, and you should know them before presenting it:

• The displacement factor is a judgment, and partners will argue about it pursuit by pursuit. Fix it once a year for each practice, based on that practice's utilization, and don't reopen it.
• Time spent with existing clients that leads to a cross-sell should not be loaded into new-client CAC. Keep "new logo" and "expansion" as separate cohorts, or account management will make new-client acquisition look ruinous.
• Small cohorts are noisy. A practice that wins eight clients a cohort can have its number distorted by one FTSE-scale tender. Report the median, and show very large pursuits separately.
• Used as a per-partner league table, it turns into a fight over compensation and origination credit. Keep it at practice level.
• Pursuit records hold prospect names and conflict outcomes, which are confidential. Store cost data apart from conflict records and limit access to those who need it.
• The full reading arrives 18 months late. Track leading indicators, such as cost per qualified opportunity, between cohort readings.

What to do on monday

• Ask practice management to open a non-billable matter code for every live pursuit above an agreed size, so partner and bid-team hours land against a named pursuit.
• Pull last year's realized rate by partner grade from the billing system, and agree one displacement factor per practice with the CFO, anchored to that practice's utilization.
• Rebuild one historical cohort: pursuits opened in Q1 or Q2 2025, which have had 15 to 18 months to resolve. Record each outcome and estimate hours from time records and calendars.
• In that cohort, list every pursuit that died at conflicts, independence or client due diligence, with the hours spent before it died. Then propose moving those checks to the first week of a pursuit.
• At the next pipeline meeting, run the go/no-go rule on three live bids and record which ones fail it.

A firm that knows its loaded acquisition cost will make different bids, cuts and channel decisions from one that thinks the marketing budget is the whole bill. Most of the data needed to get there is already in the time records the firm keeps.

The full course on this sector:Marketing in Professional Services.