Busy season fails in one place more than any other: the gap between hours promised and hours available, which shows up as a pile of unprepared workpapers in week six. The general advice is covered in managing busy season at a small CPA firm. This post goes further into the arithmetic. It gives a model for forecasting hours by engagement, splitting preparation from review, triaging by risk, and laying the calendar against the filing deadlines that drive client behavior.
Start with supply, not demand
Capacity is the number of productive hours each person can deliver between two dates. Most firms plan from the demand side, summing budgets, and discover the shortfall in February. Plan from supply first.
For each staff member and partner, compute available hours for the planning window:
- Take the calendar weeks in the window.
- Remove scheduled leave, training, firm meetings and holidays.
- Apply a utilization factor that reflects the role. Partners carry sales, review and administration. Seniors carry review of staff work. Staff carry the most chargeable time.
- Subtract committed non-audit work: tax returns, compilations, reviews and bookkeeping already in the schedule.
The result is a supply number by person and by week. Total demand for the same window comes second. A firm that sets the two side by side by week, not by season, sees the overload in the right weeks.
Forecast hours by engagement, not by client
A client-level budget hides where hours go. Forecast at the engagement level, then decompose by phase:
- Planning: risk assessment, planning memo, PBC list issuance. The audit planning memo guide and PBC list guide cover the deliverables.
- Fieldwork: testing by account cycle.
- Completion: subsequent events, representation letter, disclosure checklist, financial statement tie-out.
- Reporting and review: partner review, engagement quality review where required, issuance.
Build the forecast from last year's actual hours for the same engagement, adjusted for known changes: a new revenue stream, a lease or debt restructuring, a new ERP or accounting-system migration, a staff change on the client side, or a first-year engagement. Prior-year actuals beat standard budgets because they carry the client's real quality of records. First-year audits and opening balances need their own uplift since opening-balance work has no prior-year file to lean on.
Record a forecast range for each engagement: a base case and an overrun case. The overrun case is what the firm schedules against for its three highest-risk clients. The base case is enough for the rest.
Split preparation from review
A single hours number per engagement conceals a structural problem: preparation hours can be spread across staff and weeks, while review hours queue behind a few people. Track the two separately.
Preparation load is the work of building workpapers: tying the trial balance to the ledger, building lead schedules, preparing confirmations, rolling forward prior-year files, and tick-and-tie. It is the portion that scales with staff headcount and the portion where a backlog accumulates when clients deliver late. See lead schedules and tick and tie.
Review load is the work of the senior, manager and partner. It is limited by the number of reviewers, and each engagement needs it at set points. Model it as hours per engagement per review stage, then place those hours on specific reviewers' weeks.
The test of the plan is simple. For each week, compare the review hours scheduled against the review hours available. If review demand exceeds supply in a given week, move preparation earlier for the affected engagements or move the due date.
Define the backlog and measure it weekly
The workpaper prep backlog is the set of workpapers that must exist for an engagement to move to review and do not. Measure it as count and hours:
- Workpapers required by the audit program but not started.
- Workpapers started but waiting on a client document.
- Workpapers prepared but not yet reviewed.
Report these three numbers per engagement every week. "Waiting on a client document" is the one to escalate, because no staff effort clears it. Each item in that bucket needs a named client contact, a request date and a follow-up date. Tying the list to the PBC tracker keeps the two views in sync.
Preparation work that does not depend on client judgment is the first candidate for automation or outside support. The trial balance mapping, lead schedules, rollforwards and tie-outs fit that description. Moving those hours off the senior's desk frees review capacity, which is the scarce resource. See outsourced audit support for CPA firms for how firms structure that handoff while keeping review and sign-off in-house.
Triage by risk, not by due date
When supply falls short, the default is to work the earliest due date first. Risk-based triage is better. Rank each engagement on four dimensions:
- Engagement risk: public interest, lender or investor reliance, going-concern indicators, prior-period misstatements. See the audit risk model.
- Complexity: number of cycles, estimates, related parties, segments.
- Client readiness: how complete and timely the PBC deliveries have been so far.
- Deadline hardness: statutory, lender-imposed or soft.
Score each from one to three. The highest-scoring engagements get the first pick of senior and partner time, and they get the overrun-case budget. Low-risk, ready clients receive standard staffing and a firm schedule.
Triage also covers the decision to defer. An engagement with weak client readiness and a soft deadline is a candidate for a later start, not an earlier one. A client that cannot deliver its trial balance on the agreed date moves to a later slot, and the next ready client takes the open time.
Build the calendar around confirmed deadlines
Statutory deadlines drive client behavior, so the calendar starts there. The core federal deadlines for calendar-year clients are:
- Form 1065. A domestic partnership files by the 15th day of the 3rd month after its tax year ends. For calendar-year partnerships the due date is March 15. Form 7004 requests an automatic 6-month extension.
- Form 990, 990-EZ and 990-PF. These returns are due by the 15th day of the 5th month after the accounting period ends. For calendar-year organizations that is May 15. Form 8868 requests an automatic 6-month extension.
- Form 5500. The return is due on the last day of the seventh month after the plan year ends, which is July 31 for a calendar-year plan. Form 5558 requests an extension.
These dates stack on the audit calendar. A calendar-year audit client that also has a partnership return due March 15 and a 401(k) plan filing at July 31 produces three separate workloads for the same client contact. Schedule the partnership work to finish before the audit fieldwork window opens, not inside it. For plan filings, set the plan audit date so it lands before July 31. See Form 5500 filing guide and 401(k) audit requirements.
For nonprofits, the May 15 Form 990 date follows a calendar-year audit by only a few weeks, so the audit must finish early enough for the return to use final numbers. See nonprofit audit requirements.
A weekly operating rhythm
Run capacity as a weekly 30-minute meeting with a fixed agenda:
- Supply versus demand for the next four weeks, by person.
- Review queue: engagements ready for review, reviewer assigned, date.
- Prep backlog counts and the client-wait list.
- Engagements at risk of missing their date, with the decision: add capacity, move the date or reduce scope within professional standards.
- New work requests, answered against the supply number.
The fifth item is where the plan holds or breaks. A new engagement request is a demand entry. If the supply for the target weeks is already committed, the answer is a later date or a no.
What not to compress
Compression decisions are quality decisions. Do not shorten risk assessment, fraud inquiries, journal entry testing, subsequent events procedures or engagement quality review to recover time. Those are the sections reviewers and peer review test. See AICPA peer review guide. Recover time from preparation mechanics and client wait, not from judgment work.
Sources
- IRS: Instructions for Form 1065, When To File
- IRS: Form 7004, automatic 6-month extension
- IRS: Annual exempt organization return due date
- IRS: Form 5500 Corner
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