How to Calculate Utilization Rate for an Accounting Firm

Utilization rate tells you how much of your team's available time goes to billable work. For an accounting firm, it is one of the fastest ways to see whether capacity is turning into revenue or leaking away.

The math is simple. The hard part is getting clean time data to run it on. This guide covers the formula, the common mistakes, and a routine that keeps the number honest.

The utilization rate formula

Utilization rate is billable hours divided by available hours, expressed as a percentage.

Utilization rate = billable hours / available hours x 100

If a staff accountant logs 130 billable hours in a month and had 160 available hours, their utilization rate is 130 / 160 = 81%.

You can run the same calculation for a person, a team, a service line, or the whole firm. Just keep the definitions the same each time you compare.

Decide what counts as available

Most disagreement about utilization comes from the denominator. Pick one definition and write it down.

• Total hours: Every paid hour, including holidays and time off. Simple, but it punishes people for taking leave.
• Working hours: Paid hours minus holidays and approved time off. This is the most common choice for staff-level reporting.
• Target hours: The hours a role is expected to bill, which may be lower for managers and partners.

For most firms, working hours is the right place to start. It reflects the time a person could actually have billed.

Decide what counts as billable

Billable time is work you can invoice to a client. Non-billable time is everything else: internal meetings, training, business development, admin, and write-offs you decide not to charge.

Two edge cases come up often in accounting:

• Busy season prep work. If you bill it, it is billable. If you absorb it as a courtesy, log it as non-billable so the data shows the cost.
• Fixed-fee engagements. Track hours against them anyway. You may not invoice by the hour, but you still need to know whether the fee covers the effort.

Flag each time entry as billable or non-billable when it is logged. Fixing it at month end from memory is where accuracy goes to die.

What is a good utilization rate for accountants?

There is no single right number. Targets depend on role and firm model, so treat any benchmark you read online as a starting point, not a rule.

In general, the pattern looks like this:

• Staff and seniors carry the highest targets because most of their week is client work.
• Managers sit lower because they review, train, and handle client relationships.
• Partners sit lower still because of business development and firm leadership.

Set targets per role, then review them against your own history. A firm that sets one flat target for everyone usually ends up with burned-out staff and under-used partners.

Also watch for the other direction. A number that is consistently very high can mean people are stretched, and quality or retention may suffer.

Track utilization from daily time entries

Month-end reconstruction produces estimates, not data. A better routine looks like this:

1. Log time daily against a client and project, with the billable flag set.
2. Have managers approve time entries on a regular schedule, weekly works well.
3. Review utilization by person and by team after approval, not before.
4. Compare it to the target for each role and look for patterns, not single bad weeks.

Approvals matter here. Unapproved time inflates or deflates the figure and makes the report hard to trust.

Use the number to make decisions

A utilization report is only useful if it changes something. Look for these signals:

• Low utilization across a team: Check whether the work is there. If it is not, the problem is sales or scheduling, not effort.
• Low utilization for one person: Look at assignments and non-billable load before drawing conclusions.
• High utilization with low revenue: Check rates and write-offs. Busy is not the same as profitable.
• Uneven spread across staff: Rebalance work before someone burns out.

Utilization also feeds a bigger question: who is ready for more responsibility. The same time data that shows capacity can inform fair, consistent promotion conversations, which is the idea behind Track, Score, Promote.

Track utilization in TracX

TracX is built for professional services teams that bill for their time. You log time against clients and projects, flag it as billable, route it through approvals, and review analytics by person or team. When the work is ready to bill, the same entries feed your invoices.

If you want to see how this fits an accounting practice, read the TracX overview for accounting firms. Or start free and run your first utilization report from real entries.