How do you calculate capacity in an accounting firm?

Multiply your number of clients by the average hours each client takes per year to get required hours. Multiply your number of staff by the billable hours each has available per year to get available hours. The difference, divided by hours per staff member, is your gap in full-time equivalents.

What is a good utilization rate for an accounting firm?

There is no universal figure, because it depends on how much firm administration, training and business development sit outside client work. Compare your own result across years rather than against a benchmark you cannot verify.

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Accounting Firm Capacity Calculator

Work out whether your team can actually carry your client list. Enter four numbers and the calculator shows required capacity, available capacity, the gap in full-time equivalents and your utilization, with every step of the math visible.

Your numbers

Number of clientsNumber of staff doing client workAverage hours per client, per yearInclude chasing, queries and review, not just preparation time.Billable hours available per staff member, per yearContracted hours minus holidays, training, admin and internal meetings.

Result

Required capacity: 5,040 hrs
Available capacity: 7,800 hrs
Gap (spare): 2.1 FTE
Utilization: 64.6%

The math, step by step

1. Required hours = clients x hours per client = 180 x 28 = 5,040
2. Available hours = staff x hours per staff = 6 x 1,300 = 7,800
3. Gap in hours = required − available = 5,040 − 7,800 = -2,760
4. Gap in FTE = gap ÷ hours per staff = -2,760 ÷ 1,300 = -2.1
5. Utilization = required ÷ available x 100 = 64.6%

How to read your result

Utilization above 100% means your client list requires more hours than your team has. That is not automatically a crisis, because firms absorb overload through overtime, outsourcing and a certain amount of work quietly slipping into the following month. It does mean the slack is coming from somewhere, and it is worth knowing where.

Utilization comfortably under 100% is not automatically good either. It can mean capacity for growth, or it can mean your hours-per-client figure is understated because nobody tracks the chasing, the queries and the rework. The number is only as honest as the input, which is the main argument for recording time against engagements rather than estimating it once a year.

The FTE gap is the figure to take into a hiring conversation. A gap of 0.4 FTE is a scheduling problem: move work between people, push internal dates earlier, or decline two clients. A gap of 2.3 FTE is a structural problem that overtime will not solve, and deciding that in November is a very different experience from discovering it in March.

Two refinements make the result considerably more useful. First, run it per role rather than firm-wide. Firms are rarely short of capacity overall; they are short of reviewers, and a firm-wide average hides that completely. Second, run it per quarter. An accounting firm's demand is not evenly distributed across the year, and an annual figure that looks healthy can conceal a February that is 40% oversubscribed.

Finally, be honest about available hours. Contracted hours are not available hours. Once you remove holidays, training, internal meetings, business development and the administrative work every firm has, the realistic figure is usually well below what the payroll system implies. Using the optimistic number is the most common way a capacity plan fails.

Once you have the picture, the operational question is whether you can see the same numbers throughout the year rather than in a one-off spreadsheet. That is what capacity planning for accounting firms covers, using the work already scheduled in the system rather than estimates.

See your capacity update itself

In Remindoo the same calculation runs off scheduled work and real hours, per person and per period, so the plan stays current after November.

Book a demo Capacity planning