How to Calculate Billable Utilization for Your Agency

Define eligible client hours, choose an available-hours denominator and keep the period consistent. This guide separates utilization from time-target progress, billing value and cash.

Billable utilization is the share of available working capacity used for work classified as billable under your stated policy. Two teams can report the same percentage while counting different work or using different capacity assumptions. Write down those definitions before comparing results.

Use the billable utilization calculator for a what-if calculation. For project economics, use the worked profitability review. More billable time does not by itself establish a profitable project or a paid invoice.

1. Define the numerator

The numerator is hours that qualify as billable under the agreed scope and your measurement policy. It is not automatically all client-related time, all time with a bill rate, hours already invoiced or money collected.

On a fixed-price engagement, you may classify eligible delivery hours as billable for internal utilization measurement. That classification does not authorize another hourly invoice. Keep the fixed fee and scope intact, and record write-offs or unapproved additions separately where your review needs that distinction.

Use task names, project associations and descriptions to review the recorded work. Do not assume that the presence of a project or bill-rate value proves that an entry is contractually billable.

2. Choose a denominator and name it

The basic formula is:

Billable utilization = Eligible billable hours ÷ Available hours × 100

“Available hours” needs a definition. These three measures answer different questions:

The third measure is not a substitute for capacity utilization. If someone records only client work, their billable share of recorded time may look high while leaving a substantial gap against their available hours.

For a team, sum eligible billable hours and sum the corresponding capacity hours before dividing. An unweighted average of people's percentages gives a part-time person the same influence as a full-time person, which can distort the team result.

Define treatment of part-time schedules, joiners and leavers, leave, overtime and holidays. Use the same people and dates in the numerator and denominator. If capacity is zero, show the result as not applicable rather than dividing by zero.

3. Apply the method to the Northstar example

The fictional Northstar delivery review (Demo) contains 8 recorded project hours. For this utilization illustration, make two additional assumptions explicit:

• All 8 hours qualify as billable under the example's agreed scope and measurement policy.
• Available working capacity for the same person and review period is 10 hours.

Eligible billable work = 8 hours
Assumed available working capacity = 10 hours
Illustrative utilization = 8 ÷ 10 × 100 = 80%

The 10-hour denominator is an editorial planning assumption, not a capacity value retrieved from the app. The example does not assert how the other two available hours were used. They could represent unrecorded work, other responsibilities or unused capacity; those possibilities require separate evidence.

Using 8 recorded hours as both numerator and denominator would instead produce a billable share of those recorded entries. It would not establish that the person used all available working capacity.

The project-profitability calculation uses the same recorded work to examine cost and rate-based value. Its contribution percentage and this utilization percentage have different denominators and meanings.

4. Read Corcava's time reports correctly

In Reports, select the relevant period, people and projects. Review the hours and use grouping by member, project, client or task to understand the work. Check descriptions and agreement terms when classifying eligible billable hours for your calculation.

The report's Billed amount values recorded hours at bill rates. It is not a billable-utilization numerator, an invoice total or a payment. Total Spent values recorded hours at cost rates. Neither amount supplies available capacity.

Time-target progress is a different measure too. A percentage comparing tracked hours with a configured target tells you progress toward that hours target. It does not establish the proportion of capacity spent on billable work.

Prepare utilization separately using your reviewed numerator and documented capacity source. This walkthrough does not claim a native gross/net utilization dashboard or automatic billable classification. Corcava's reporting page explains the supported report views.

5. Check data quality before judging the percentage

Missing time has different effects depending on what is missing and how the denominator is defined:

• Missing billable entries can understate utilization against fixed capacity.
• Missing non-billable work can inflate the billable share of recorded time.
• An overstated capacity denominator can understate utilization.
• A reduced denominator or inconsistent leave exclusions can make the same workload look more utilized.

Compare recorded work with the expected schedule to find gaps, but investigate them before classifying the gap as unused capacity or lost revenue. An hours target, a timesheet total and an employment schedule are different inputs.

Check your billing policy as well. Reclassifying internal work to make a percentage look better does not create an agreement to charge the client. Record the work accurately, then resolve scope and billing questions through the normal approval process.

6. Set a target that fits the role

Use your own baseline, contracted responsibilities and delivery model to choose targets. A consultant who also handles sales and account management has a different workload from someone assigned mainly to delivery. Reserve capacity for coordination, administration and development rather than treating every non-billable hour as waste.

When comparing an external benchmark, check its date, sample, roles, billing definition and leave treatment. Without those details, the percentage is not a reliable like-for-like comparison. The utilization review playbook shows how to investigate the causes behind your number.

An improvement scenario can multiply additional eligible hours by an assumed rate. Label that result potential billing value: demand, scope, pricing, invoicing and collection still determine the eventual financial outcome.

Copyable utilization review

Review period and included people:
Billable classification policy:
Eligible billable hours and source:
Contracted capacity:
Leave/holiday exclusions:
Available working capacity:
Chosen denominator and utilization result:
Recorded-time gaps to investigate:
Role-specific target and rationale:
Action, owner and next review date:

Keep this review beside the client-profitability calculation, not in place of it. Utilization describes how capacity was used; profitability also needs the price of the work and its full cost.