The Unbilled Hour: Giving Scope Creep a Line in the Management Accounts
Photo: Enoch Fairhurst, Public domain, via Wikimedia Commons
Fixed fees are a promise about a defined piece of work. They are not a promise that the client will stop asking for more. In UK consultancy, the gap between the two is rarely dramatic. A short call. A revised slide. A request to “just sense-check” a document before a board meeting. Individually, each request looks like service. Collectively, they transfer margin from the consultancy to the client, one unbilled hour at a time.
The problem is not that firms fail to notice every request. The problem is that nobody records the pattern. A retainer described as including “reasonable additional support” becomes an elastic concept. The engagement partner absorbs the extra work to protect the relationship. The client learns that the boundary is soft. By the time the invoice is issued, the conversation about scope feels awkward, defensive or simply too late.
Why the leakage stays invisible
Time recording often stops at the invoice. Once the fee is fixed, the timesheet becomes a record of effort rather than a signal about value. Retainers make this worse. They imply a steady rhythm of work, but they rarely define what happens when the rhythm changes.
There is also a cultural obstacle. Many professional firms are reluctant to look commercial in front of a client they like. Charging for a fifteen-minute call can seem petty. The answer is not to invoice every minute. It is to see the cumulative value of the requests before they become a habit.
A ledger with five columns
The tool can be simple: a shared spreadsheet or a tab in the matter file. Five columns are enough.
| Date | Client and matter | Request | Time and cost | Treatment |
|---|---|---|---|---|
| 3 Nov | Client A — retainer | Review revised supplier terms | 1.5 hours; £225 at internal rate | Ambiguous |
| 7 Nov | Client B — fixed fee | Attend extra board meeting | 2 hours; £400 | Out of scope |
| 12 Nov | Client C — project | Additional data cut | 3 hours; £360 | Out of scope |
The “Treatment” column matters more than the arithmetic. Mark each item as in scope, ambiguous or out of scope. In-scope items need no action, but they show where the fee is being earned. Ambiguous items need a decision before they become precedents. Out-of-scope items need a conversation.
The ledger is not a timesheet. It is a decision log. Its purpose is not to justify a larger invoice after the event, but to make the scope question visible while the work is still live.
Run it monthly, for one hour
At month end, the engagement lead reviews the ledger with the person who manages the client relationship. The review should take an hour, not a day. For each out-of-scope item, the firm chooses one of four responses: reprice, reset, release or absorb.
Absorbing is a legitimate choice, but it should be recorded as a choice. “We absorbed £700 of extra work this month because the client is introducing us to a new division” is a commercial decision. “We did not notice” is a control failure.
The ledger should also produce a monthly total. If out-of-scope work exceeds an agreed percentage of the fee — 5 per cent is a useful starting point for many retainers — the engagement is flagged for review. The figure is not a rule. It is an early warning.
The conversation, not the spreadsheet
The ledger only creates value when it changes a conversation. That conversation should happen while the request is live, not at invoice stage. A useful opening is direct but not adversarial: “The work you asked for last week sits outside the agreed brief. I can quote it separately, extend the retainer, or hold it for the next phase. Which would you prefer?”
That sentence does three things. It names the boundary, offers choices and avoids implying that the client has done something wrong. Most clients will choose one of the options. A few will push back. Either way, the firm learns something about the relationship.
Reprice, reset or release
Repricing works best for a defined extra: a variation letter, a fixed quote or a change to the next invoice. It preserves the original engagement and puts a price on the addition.
Resetting is better when the pattern has changed. The retainer may need a higher fee, a narrower scope or clearer assumptions about meetings, reporting and turnaround. A reset is not a penalty. It is an adjustment to reality.
Release is the option firms forget. Some out-of-scope requests are a signal that the client needs a different service, a different provider or a different level of support. Declining the work, or referring it elsewhere, can protect both margin and goodwill.
Make it stick
A scope ledger fails if it is treated as a finance exercise. It belongs to the engagement lead, not the billing team. It should be reviewed alongside utilisation and debtors, and it should feed back into proposals. If a firm knows that additional data cuts consistently take three hours, the next proposal can price them in or exclude them expressly.
After six months, the benefits are usually modest but real: fewer difficult invoices, better assumptions in engagement letters and a clearer view of which clients are profitable after the quiet extras are counted. The unbilled hour is not always a problem. It becomes a problem when it is invisible. A monthly ledger gives it a line, a value and a decision.
