The Client P&L: Finding the Accounts That Quietly Subsidise Your Consultancy's Growth
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Revenue is the most flattering figure in a consultancy's management pack. It rises predictably with headcount, it looks impressive in a year-end summary, and it is almost always the first number a managing partner quotes. It is also the least informative.
A firm can grow fifteen per cent in a year while losing money on half of its client portfolio. The reason is structural: the costs that destroy client-level margin rarely sit in a project code. They sit in partner time that was never billed, in pitching that never converted, in scope absorbed without a variation, and in receivables that arrived ninety-four days late.
Why Top-Line Growth Misleads
Consultancy economics are dominated by one scarce resource: senior, client-facing time. Growth that consumes that time on accounts that do not cover their full cost of service is not growth at all. It is a transfer of value from the firm to its clients, executed slowly enough that nobody notices.
The distortion is compounded by how performance is measured. Utilisation is tracked by grade, not by client. Overhead recovery is applied as a single percentage across the firm, so a demanding account with constant partner oversight looks identical to a straightforward one. And pitch costs are treated as business development, a general cost, when in reality they are frequently the largest single hidden subsidy a firm extends to an individual client.
What Full Cost to Serve Actually Includes
A defensible client P&L begins with an honest list of the costs that attach to a relationship rather than to a project.
- Bid and pitch time. Proposal writing, chemistry meetings, rehearsals, reference chasing. Across a portfolio this typically runs at between three and eight per cent of fee income, but on smaller or newly won accounts it can exceed twenty.
- Mobilisation. Onboarding, security clearance, induction, systems access, and the unbilled fortnight before anything productive happens.
- Absorbed scope. The additional analysis, the extra workshop, the rework after a change of sponsor. Every firm has a figure for this; very few know it.
- Partner and director oversight. Governance meetings, quality reviews, escalation calls. Almost never billed in full.
- Relationship management. Steering groups, quarterly reporting, social and hospitality commitments, and the general maintenance of goodwill.
- Remediation. Rework caused by misbriefing, staff turnover or misjudged delivery.
- Payment behaviour. Days sales outstanding, early payment discounts offered under duress, and the cost of funding receivables.
- Opportunity cost. The senior hours consumed by an underperforming account that could have been deployed on a better one.
Building the Client P&L in Four Steps
Capture time at client level. Not project level, client level. The distinction matters because scope creep frequently moves between projects within the same relationship.
Allocate directly attributable time. Any hour that exists because a particular client exists belongs to that client, whether or not it was invoiced.
Apply a transparent overhead recovery rate. One rate, published internally, so that every account carries its share of premises, support functions and the bench.
Deduct to arrive at client contribution, then test it against a hurdle rate that reflects the firm's cost of capital and its alternative uses of senior capacity.
The Four-Box View
Once contributions are known, accounts sort into a familiar pattern. The discipline lies in acting on it.
| High contribution | Low contribution | |
|---|---|---|
| High revenue | Protect and invest: this is the franchise | Reprice, restructure or re-scope |
| Low revenue | Grow, or systematise to protect margin | Exit, or convert to a low-touch model |
The most dangerous quadrant is not the small loss-making account. It is the large one. A high-revenue, low-contribution client is politically difficult to confront and commercially ruinous to keep, and it is usually the account that absorbs the firm's best people.
Three Decisions: Reprice, Renegotiate, Release
Reprice. The most underused instrument in British consultancy. A price rise is credible when it arrives with evidence: time records, change logs, a clear statement of what the current fee buys and what it no longer buys. Firms that walk in with a spreadsheet rather than an apology usually succeed.
Renegotiate. Change the shape of the work, not just the number. Reduce cadence of reporting. Move to a fixed scope with priced variations. Introduce milestone billing to shorten the cash cycle. Reduce the senior grade on routine meetings. All of these are easier to sell than a headline rate increase.
Release. Exiting an account is a commercial decision, not a moral failure. Plan the transition, protect the relationship where it has value elsewhere, and redeploy the senior hours deliberately. A firm that exits two weak accounts and reinvests the capacity will almost always out-earn one that keeps them out of loyalty.
Making It a Habit
Client profitability analysis fails when it is an annual exercise, because by the time the numbers are produced the year is gone. It should run quarterly, take ninety minutes, and cover the top twenty accounts by revenue plus every account flagged below the hurdle.
Two further disciplines are worth adopting. First, monitor concentration: no single client should represent a share of contribution that the firm could not survive losing. Second, be sceptical of the anchor client, the marquee name that justifies a discount on the grounds of reputational value. Reputation is real, but it should be quantified in the P&L, not assumed.
Growth is not a strategy. Profitable growth, measured at the level where value is actually created or destroyed, is. The client P&L is the instrument that tells the difference, and for many British consultancies it will be the most uncomfortable document produced this year.
