Automation can refresh utilization faster, while Everhour keeps leave and capacity data tied to tracked time.
Measure billable utilization against total capacity and see exactly how many hours you're leaving on the table each period.
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A utilization calculation answers one practical question: out of the hours a person or team was available to work, how many became billable hours? The common services formula is billable hours divided by available hours, then multiplied by 100. A consultant with 126 billable hours against 150 available hours has 84% utilization, based on that 150-hour denominator.
The available-hours denominator is a firm policy input in the United States. The FLSA does not define full-time or part-time employment, and the FLSA does not require payment for time not worked, including vacations, sick leave, or holidays. Many U.S. firms start with a 40-hour gross weekly baseline because federal overtime rules require covered nonexempt employees to receive overtime pay for hours worked over 40 in a fixed 168-hour workweek.
The core formula is `billable hours / available hours * 100`. Available hours can mean gross capacity, working hours net of PTO and holidays, or total logged hours, depending on the policy. A 40-hour weekly baseline equals 2,080 annual gross hours before subtracting company PTO, holidays, unpaid leave, or other nonworking time.
For a monthly example, start with 160 gross capacity hours. Subtract 8 company holiday hours and 2 paid leave hours, leaving 150 available hours under a net-working-hours denominator. If the employee records 126 billable hours, the utilization rate is 126 divided by 150, or 84%. If the same 126 billable hours were divided by 160 gross hours, utilization would be 78.75%.
AI assistance can pull billable hours, capacity, holidays, and leave into a live ratio faster than a spreadsheet. It can also flag missing time, unusual billable spikes, or people who are far below or above target. Automation does not decide whether your firm uses gross capacity, capacity net of leave, or logged hours as the denominator.
That policy choice changes the number. Federal sources define work-hour and leave rules, but they do not set a U.S. professional-services utilization target. The target utilization rate is a firm or industry benchmark choice, often set by role, service line, or delivery model. Delivery roles usually carry different targets from managers, sales support, or internal operations roles.
A one-off calculation is enough when you need to verify a person, project, or month from known billable and available hours. It also works for quick planning checks, such as deciding whether a 20-hour assignment fits inside next week's remaining capacity. The calculation starts to break down when the underlying hours live across timesheets, leave requests, project tools, and capacity plans.
A managed workflow gives the utilization number a durable source of record. Everhour Time Off tracks vacations, sick leave, holidays, and custom leave types alongside work time, with partial-day durations and capacity-scaled day lengths. That matters because leave affects the available-hours denominator before any AI-assisted utilization report can produce a clean, repeatable result.
This content is for general information only, may not be fully up to date, and is provided without any warranty or liability.
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AI can apply the denominator rule you give it, but it should not choose the rule for the firm. Leadership needs to define whether available hours mean gross capacity, capacity net of PTO and holidays, or total logged hours. The calculator then applies that definition consistently across people, teams, and periods.
Two tools can show different answers when they use different denominators. One may divide billable hours by gross capacity, while another subtracts PTO, holidays, sick leave, or unpaid leave first. The result is valid only when the denominator is visible, named, and used consistently for the comparison you are making.
U.S. federal sources do not set a professional-services utilization target. The FLSA defines overtime requirements for covered nonexempt employees, and federal leave rules address specific worker rights, but utilization targets belong to the firm. Set targets by role, service line, staffing model, and business economics.
Automated utilization should include or exclude holidays based on your denominator policy. OPM lists 11 federal holidays in 2026 for federal employees, but private-sector paid holidays are an employer policy matter unless another law or contract applies. A net-working-hours denominator subtracts company-recognized holidays before calculating utilization.
Utilization can use total logged hours as the denominator, but the metric then answers a narrower question: what share of logged time was billable. Capacity-based utilization answers whether available working capacity turned into billable work. Label the metric clearly, because these two versions support different staffing and pricing decisions.
Everhour Time Off tracks vacations, sick leave, holidays, and custom leave types with partial-day durations, accrual, carryover, and per-employee balances. Time-off data flows into timesheets and reports, so managers can subtract approved absences from available capacity before reviewing utilization.
Everhour Reporting turns logged time, budgets, costs, and project data into customizable reports with columns for billable time, member, project, client, and labor costs. Managers can group and filter reports by team, person, or project to compare utilization against the target used internally.
Track approved time off, capacity, and billable hours in one workflow. Everhour gives teams cleaner utilization reporting by keeping absence data connected to the available-hours denominator.
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