The billing gap: what a three-consultant firm was leaving unbilled every month

Three senior consultants. An analyst. A portfolio of six to eight active mandates at any time — strategy engagements, operational diagnostics, board advisory work for Swiss SMEs. The firm was billing between CHF 180,000 and CHF 220,000 per year. The partners had a vague, persistent sense that the real number should be higher. They were right.

The managing partner had tried two time-tracking tools over five years. Both had been abandoned within three months. The consultants found the friction of logging time while doing demanding cognitive work genuinely incompatible with how they worked. By the time they had finished a client call or a workshop, the exact time breakdown felt irrelevant. They would log later. Later became approximate. Approximate became zero.

The firm and the structure

Swiss boutique consulting firms billing on time and materials face a particular discipline challenge: every client interaction — a thirty-minute advisory call, a follow-up email that required an hour of research, a quick review of a document before a meeting — is billable in principle. In practice, these small interactions are the most likely to go unlogged, because logging them requires stopping work to record work. Across three senior consultants billing at CHF 240 per hour, even two hours of unlogged time per week represented CHF 1,440 per month in lost revenue.

The Clarity Scan mapped the billing gap precisely. It also found two other workflows consuming significant time with no corresponding output.

What the Clarity Scan found

• Unlogged billable time. We reviewed three months of calendar data, email archives, and invoiced hours across all three consultants. We cross-referenced logged hours against calendar entries for client meetings, calls, and workshops, and against email chains with clients to identify unlogged follow-up work. The gap was consistent and significant: on average, each consultant was logging 5.2 fewer hours per month than calendar evidence indicated they had worked on client matters. At CHF 240 per hour, this represented CHF 3,744 per consultant per month, or CHF 11,232 per month across the three — CHF 134,784 per year in revenue from work already performed, simply not captured.
• Proposal assembly. The firm received eight to ten new mandate inquiries per month and produced formal written proposals for six to eight of them. Each proposal required a customised section on the client's situation, a scope definition, a delivery timeline, and a fee table. The underlying thinking — which was genuine intellectual work — took two to three hours. The formatting, structure, and production of the document took another two hours: assembling the template sections, writing the cover page from scratch, building the fee table in the firm's standard layout, exporting to PDF, preparing the cover email. This structural work was identical across proposals. It was being rebuilt every time.
• Quarterly MWST preparation. The firm's part-time bookkeeper spent between four and six hours every quarter preparing the Swiss VAT (MWST) declaration: pulling invoiced amounts from the billing system, cross-referencing against bank statements for received payments, applying the appropriate 8.1% rate to qualifying revenue, reconciling with the previous quarter's declaration. The process was correct and thorough. It was also entirely reproducible as a structured workflow, not as manual document review.

The managing partner chose to address the first two findings immediately. The MWST preparation was deferred to a subsequent engagement with their bookkeeper, who was already planning to review the accounting workflow in the second half of the year.

What we built

Time capture now happens at the point of activity, not in arrears. Each consultant's calendar is the source of truth: when a calendar event is marked as client-related, a lightweight prompt appears after it ends — visible on phone or desktop — asking for a single input: how many minutes were actually spent, and on which matter. The form takes under thirty seconds. No project codes, no detailed narrative, no switching to a dedicated tool. The data flows directly into the billing system.

For client calls and emails that are not calendar events, a simple shared inbox rule flags client-domain email threads with a time-estimate prompt if they exceed a set length threshold. Advisory emails over 200 words almost always represent billable work. The prompt makes that visible at the moment the email is sent, rather than three weeks later when memory has degraded to zero.

The result, measured

After twelve weeks of the new system, with two full billing cycles of clean data:

The finding they didn't act on yet

The MWST preparation workflow was not addressed in the Sprint. The bookkeeper is reviewing the accounting infrastructure in Q3; when that review happens, the structured extraction and calculation workflow will be straightforward to add. The Clarity Scan report documented the current-state cost: 4 to 6 hours per quarter in work that could be reduced to under one hour. That saving is still there, waiting.

Worth noting: the partners' first reaction to the billing gap finding was scepticism. They did not believe the number was really CHF 134,784. It felt too high. We showed them the calendar evidence and the invoice records side by side. The gap became visible only when the two data sources were placed next to each other — which the firm had never done before, because there was no reason to until someone set out to measure it.

The admin tax that consulting firms carry silently

Consulting firms do not have an efficiency problem in the conventional sense. Their output is thought, which is difficult to automate and impossible to speed up without degrading quality. What they do have is an invisible administrative layer that surrounds the billable work: the time to log it, the time to document it, the time to package the same intellectual content into a proposal format for the fourteenth time.

In a time-and-materials model, this administrative layer has a direct and measurable cost. It appears not as an expense line but as a revenue gap: hours worked, not captured, not invoiced. The Clarity Scan finds that gap by comparing the work that happened against the work that was billed. Most firms we have looked at have not done that comparison before.