Realisation rate is the cleanest single indicator of pricing health in an accounting firm. It tells you what percentage of the work you actually did made it onto an invoice and survived the client conversation. Most UK mid-tier firms plateau between 82% and 88%. Pushing the number sustainably above 90% takes deliberate work, and almost always reveals where the leak was hiding.
Where the leak actually sits
Realisation drops at one of four points in the lifecycle: scoping (the engagement underpriced the work from day one), delivery (the team over-engineered or duplicated effort), pre-billing review (the partner wrote down WIP before invoicing to "look reasonable"), or post-billing (the client negotiated the invoice down).
Most firms blame the client negotiation. The data rarely supports that. Across 20+ firms diagnosed, the largest single source of realisation loss is partner pre-bill write-downs - the manager hands over £6,200 of WIP and the partner invoices £5,000 because "we agreed £5k at the start". The scoping conversation was where the money was lost, not the billing.
The pre-bill write-down problem
Pre-bill write-downs are the silent killer because they never appear in any client conversation. The work was done, the time was recorded, and then the partner quietly reduced the bill before it went out. Realisation drops, the team learns that overruns are absorbed not raised, and the original mispricing never gets confronted.
A useful discipline: any write-down above 10% requires a one-paragraph note explaining whether it was scoping, delivery, or client-relationship. Reviewed monthly by the management committee. Within two quarters, the firm has a clear pattern of where realisation actually leaks.
Scoping discipline at the engagement letter
Most engagement letters describe scope in noun phrases - "preparation of statutory accounts" - that hide vast variation in effort. A clean engagement specifies the expected scope in measurable terms: number of bank accounts, volume of transactions, number of inter-company entities, treatment of foreign branches. Anything outside that scope triggers a written variation and a fee adjustment.
Firms that move to this kind of engagement see realisation rise 4-7 points within a year. The difficult work is doing it consistently for new engagements; legacy clients can be migrated at renewal.
The delivery side: scope creep and rework
On the delivery side, two patterns destroy realisation: scope creep that nobody invoices for (the client casually mentions a query and the senior spends three hours on it), and rework caused by missing information at the start of the job. Both are operational, not pricing, problems.
For scope creep, the fix is a 5-minute weekly job-status discipline where the manager flags any out-of-scope work and the partner decides whether to invoice it. For rework, the fix is a pre-job checklist that prevents the team starting until all necessary information is in. Both are unglamorous; both move the number.
Visibility is half the battle
You cannot diagnose realisation leaks without seeing them. Time recorded by job, in real time, against budget and scope, with write-downs flagged at the moment they happen. Most firms only see this at month-end, by which point the conversation is post-mortem.
Practice-management platforms like Accupe surface WIP by job and by partner in live views. When a job goes over budget, the manager and partner see it before the invoice is raised, not after. That timing shift moves write-downs into "let's have a scope conversation with the client" rather than "let's quietly absorb the cost".
The ceiling effect
Even a well-run firm rarely sustains realisation above 95%. There is irreducible variance - clients who legitimately have more complex affairs than expected, judgement calls on scope, the cost of doing business. Trying to push past 95% usually backfires into over-billing and damaged relationships. The realistic ceiling for a healthy mid-tier UK practice is 92-94%. The goal is to find your ceiling and hold it, not to chase 100%.
Diagnosing your firm in a fortnight
Pull the last six months of jobs above £3,000. For each, record budgeted hours, actual hours, invoiced amount, and write-down (if any). Categorise the write-downs into scoping / delivery / pre-bill / negotiation. The pattern will be obvious within an hour. Most firms find 50-70% of the loss is in pre-bill write-downs and unbilled scope creep - both internal, both fixable, both invisible until measured.
Closing
Realisation is the most honest pricing metric a firm has. The number is not improved by exhortation. It is improved by tighter scoping, better in-flight visibility, and the discipline of confronting write-downs at source. Do that work for six months and the ceiling shifts upward without anyone needing to chase clients harder.