Two twenty-person agencies. Same rates, same overhead, same clients. One runs at 65 percent billable utilization, the other at 75. The ten-point gap is roughly 4,000 billable hours a year, and at a blended $125 an hour that's half a million dollars. Same team. Same fixed costs. Very different year.

That's why utilization is the number to watch. It's also the number most easily gamed, misread, or pushed past the point where it starts costing you people. This post covers the formula, the split between billable and non-billable hours, benchmarks by role, and the handful of changes that actually move it.

(This post absorbs an older one on billable versus non-billable hours. They were the same topic.)

The formula

Utilization rate = billable hours ÷ available hours × 100.

Thirty billable hours in a forty-hour week is 75 percent. Simple. The trouble is in the two inputs.

Billable hours are hours you can charge to a client under a contract: production, client meetings, revisions, project management on client work, QA. A useful test: if the work wouldn't exist without a paying client, it's billable.

Available hours are working hours in the period minus time off. A full-time person has about 2,080 hours a year on paper and 1,800 to 1,900 once holidays and leave come out. Use the real number or every rate you calculate is a few points too low.

Billable utilization and total utilization are different numbers

Billable utilization is revenue-generating work against available time. Total utilization (some people say productive utilization) is all real work, billable or not, against available time.

Track both. Someone at 70 percent billable and 95 percent total is fully occupied and doing a lot of non-billable work. For a team lead, that may be exactly right. For a production designer, it's a flag. Someone at 70 percent billable and 72 percent total has slack you're paying for.

What counts as non-billable, and the gray areas

Non-billable is everything that supports the business without a client to charge:

Admin: timesheets, expenses, internal email
Internal meetings and one-on-ones
Business development: proposals, pitches, sales calls
Training and conferences
Internal projects and process work
Bench time, when there's nothing assigned

Then the gray areas. Travel to a client site. Internal creative review on client work. Rework caused by an unclear brief. There's no universal answer, and it doesn't matter much which way you go. What matters is that you decide once and everyone codes it the same way, because inconsistent categories make the whole data set useless.

Benchmarks, by role, not for the whole agency

Agency-wide averages hide everything. Use role targets:

Production staff (designers, developers, writers): 75 to 85 percent
Project managers: 60 to 75 percent
Principals and senior leadership: 40 to 60 percent
Agency-wide: 65 to 75 percent

Below 60 percent overall usually means a structural problem: too much overhead, weak scoping, or not enough pipeline. Above 80 percent sustained is a burnout warning, not a trophy.

Some agencies run happily at 65 and some at 75. Both can be healthy. What isn't healthy is a 72 percent average made of half the team at 90 and the other half at 50. That's an allocation problem wearing a good average.

Why 100 percent is a trap

It's tempting to fill every hour. Don't.

There's no room for the unexpected. Client emergencies and scope changes are normal, and a team at 100 has nowhere to put them except on top of something else.

Non-billable work isn't waste. Training is how services stay sellable. Business development is next quarter's revenue. Ten hours building a project template that saves two hours a project is the best trade in the building. Cut the wasteful non-billable time (overlong meetings, admin that nobody reads) and protect the rest on purpose.

And people leave. Someone run at capacity for months produces worse work, makes more mistakes, and eventually resigns. Replacing a senior person costs far more than the extra billable hours ever earned.

The target is optimal utilization, not maximum: the rate that makes money while keeping quality, the team, and the pipeline intact.

What actually moves the number

Scope better. The most common cause of low utilization isn't idle people. It's projects that ran over the estimate, with the overrun unbilled. Tighter scoping turns the same hours into billable hours.

Kill the admin overhead. If people spend hours on timesheets, status reports, and hunting for information across tools, that's recoverable. An integrated platform where time, projects, and clients live together typically gives back a few hours per person per week compared to a timer plus a separate project tool plus a spreadsheet.

Shorten meetings. Meetings are the biggest non-billable line at most agencies. Audit recurring ones quarterly. Default to 25 minutes. Make status updates asynchronous.

Fix the sales-to-delivery handoff. The days between contract signature and kickoff are dead time. Make the handoff a checklist and start the clock at signature.

Watch the project mix. Retainers give steady utilization. Big one-off projects dip between phases. Know which you have and plan the bench around it.

Match skills to tasks. People working outside their strengths take longer, and the extra time is usually the part you can't bill.

Right-size. If you consistently can't fill the team's hours, that's a staffing or pipeline problem. Contractors for the variable part is a common fix.

Measuring it so the number is real

Time data is only as good as the habit behind it.

Log everything, not just billable. If someone works eight hours and logs five, you need the other three categorized, or utilization is fiction.

Log daily. End-of-week timesheets are reconstructed from memory and always drift high on billable.

Use categories for non-billable time so you can see where it goes.

Review weekly at team level, look at rolling four-week averages rather than single weeks, and expect seasonality (December and January are low almost everywhere).

Pair it with money. A 65 percent team with strong margins and a 65 percent team with thin margins are different businesses. Utilization is a diagnostic, not a verdict. Watch it next to revenue per hour and margin per project, because it's possible to hit 78 percent by filling seats with $75-an-hour work and shrink the margin while doing it.

In Nymble

Timesheets carry an attestation step and a weekly availability survey, so the hours are more likely to be real and you can see next week's capacity without asking. The company report widgets show weekly utilization per person, billable share, and profit by team member, and the year-to-date widget puts billable, payable, and expense totals side by side. The time tracking docs and reporting docs show where each lives.

Pick a role target for each seat, get the non-billable categories agreed, and start reading the number weekly. In a quarter you'll know whether your problem is scoping, meetings, or the bench, and each of those has a different fix.

Agency Utilization Rate: How to Calculate It and What to Do About It