A job can look profitable right up until the monthly WIP report exposes the truth: dozens of hours were spent, little was billed, and nobody can say whether the work is recoverable. This guide to WIP reporting is for professional services firms that need a reliable view of work performed, value earned and revenue still sitting on the table.
WIP reporting is often treated as a finance exercise completed at month-end. That is too late. For an accountancy practice, solicitor, architect or agency, WIP is an operational control. It tells you where effort is accumulating, which matters are drifting beyond budget, and whether your team is doing profitable client work or producing unrecoverable cost.
The catch is simple: a WIP report can only be as credible as the time data beneath it. If people reconstruct their week on Friday, the report may be neatly formatted but commercially weak.
What WIP reporting should show
Work in progress, or WIP, is the value of chargeable work completed but not yet invoiced. In a time-based business, that usually means recorded time, related disbursements and other recoverable costs attached to a client, project, job or matter.
A useful WIP report does more than state a total. It shows what is building up, why it has not been billed, and what action is needed. The relevant view varies by firm. A fixed-fee design project needs visibility of time consumed against the agreed fee. A solicitor’s matter may need stage-based review and careful treatment of write-offs. An accountancy firm may need to separate recurring work from advisory assignments that have expanded without an updated scope.
At minimum, report WIP by client and job, with the responsible manager, period-to-date time, cumulative time, billed value, unbilled value, budget or fee cap, and status. Where possible, include the age of WIP. Work recorded this week is normal. Work still unbilled after 90 days is a management question.
There are two common ways to value it. Time-cost WIP reflects the internal cost of labour already used. Billable-value WIP applies charge-out rates or expected recoverable value. Both matter. Cost tells you what the firm has invested; value tells you what may be billed. The gap between them is where margin risk appears.
Why manual timesheets break WIP reporting
Traditional time tracking asks people to remember what they did, for whom, and for how long after the work has happened. That is not a system. It is a memory test imposed on busy professionals.
The predictable result is broad entries, guessed durations and time pushed to the most familiar client code. Small omissions then become large reporting errors. A project manager loses 20 minutes here and 35 minutes there across meetings, reviews and client calls. The WIP report understates delivery effort. A fixed-fee job appears healthy until the actual cost is revealed too late to change course.
Managers sometimes respond with stricter timesheet rules, more reminders and Friday-afternoon chases. That may improve completion rates, but it does not make reconstructed data accurate. Compliance and accuracy are different problems.
This matters most where staff switch between client files, email, documents, browser tools, meetings and offline applications throughout the day. The work is real, billable and commercially meaningful. It simply disappears when capture relies on someone remembering it later.
Build a WIP reporting process that drives decisions
A good process starts before the report, at the point where work is created. Every piece of time needs a clean route to the right client and job. If teams cannot tell which code to use, or projects are opened without a budget, finance inherits a data-cleaning problem that no spreadsheet can solve.
Set the reporting rules before work starts
Define what counts as chargeable, recoverable and non-chargeable for each service line. Then make sure each new engagement has an owner, billing method, scope, expected fee or budget, and a clear billing cadence.
Hourly work should have agreed rates and a review point before it becomes old WIP. Fixed-fee work needs a budgeted hours or cost allowance, even if the client will never see it. Without an internal budget, the firm cannot distinguish a successful fixed fee from an expensive one.
Also decide how you will handle work that cannot be billed. Do not leave it in WIP indefinitely because writing it off feels uncomfortable. Unrecoverable time is a commercial signal. It may indicate poor scoping, scope creep, weak change control or a client relationship that requires a different pricing model.
Capture time while the evidence exists
The strongest WIP reports are built from captured activity, not retrospective estimates. This is where automated client time allocation changes the economics of reporting. Rather than asking people to run timers or complete end-of-day timesheets, it recognises work patterns and assigns activity to the appropriate client context for review.
eppiq Timer was built around this principle: client time intelligence should reduce dependence on human memory, not merely provide a nicer timer. The practical benefit is not just less admin. It is a more complete record of the work that feeds billing, project reviews and profitability analysis.
Automation still needs governance. Staff should be able to review allocations, managers should resolve exceptions, and sensitive activity should be handled according to the firm’s privacy and information-security policies. The point is to remove routine guesswork, not remove professional judgement.
Review WIP before month-end
Month-end reporting is necessary, but monthly review alone is too slow for jobs that can burn through a budget in days. Set a weekly rhythm for active client work, particularly higher-value, fixed-fee or troubled engagements.
Ask direct questions. Has the job exceeded its time budget? Is work waiting for a client decision? Has the scope changed? Is there a milestone that should trigger an interim invoice? Is the team continuing to work without approval for additional fees?
The best WIP meeting is not a recital of totals. It produces decisions: bill now, chase information, revise the estimate, raise a variation, pause work, write off a defined amount or reassign resource. If a report does not lead to one of those actions, it is reporting activity rather than controlling performance.
Read the warning signs in your WIP report
High WIP is not automatically bad. A large engineering project may legitimately hold substantial unbilled value before a contractual milestone. Annual compliance work can build steadily before a planned billing date. Context matters.
What should concern you is ageing WIP without a billing reason, WIP rising faster than revenue, repeated write-offs for the same type of work, or large differences between estimated and actual effort. These patterns reveal where the firm is funding clients, absorbing scope creep or masking poor utilisation behind incomplete information.
Compare WIP across managers and service lines with care. One team may work on longer, milestone-based projects while another bills monthly. A fair comparison considers the engagement model, billing terms and client approval process, not just the headline total.
It is also worth separating delayed billing from disputed value. Delayed billing may be an internal process failure. Disputed value often points to weak communication, unclear scope or missing evidence of work completed. The remedies are different.
Make WIP visible to the people who can change it
Finance needs accurate WIP for revenue recognition, forecasting and close processes. But finance should not be the only team looking at it. Engagement leaders need job-level visibility while there is still time to protect margin. Operations leaders need a cross-firm view to spot capacity pressure and recurring delivery issues. Firm owners need enough clarity to see whether growth is creating profit or merely creating more unbilled work.
Keep the report focused. A partner may need a short exception view of ageing WIP, budget overruns and jobs ready to bill. A project manager may need daily detail by task and resource. Giving every audience the same dense export usually means nobody uses it.
A practical reporting cadence often combines a weekly operational exception review with a formal month-end report. The weekly review protects active work. The month-end view confirms financial position, prompts invoice preparation and highlights trends that need a wider response.
Treat WIP as a profit signal, not a spreadsheet total
Better WIP reporting does not begin with a more complicated template. It begins with trustworthy client-level time data and a clear decision process. When time is captured accurately, work is visible earlier. When work is visible earlier, managers can bill, re-scope or intervene before margin disappears.
The goal is not to watch WIP more closely while accepting incomplete inputs. Build a reporting process that exposes the work your firm is already doing – then give your people the evidence to act before that work becomes a write-off.