Everhour tracks time and time off together, so utilization checks can reflect approved absences and working capacity.
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 was available to work, how many went to billable or productive work? On Windows, keep the source timesheet, Excel export, or project report open beside the calculator, then save the result as a PDF if you need a review copy for finance, payroll, or a manager.
The numerator is the work you choose to count, usually billable client hours for a professional-services team. The denominator is available capacity. In the United States, the FLSA does not define full-time or part-time employment, so a U.S. utilization denominator should treat full-time capacity as an employer policy rather than a federal legal threshold.
Many U.S. firms start with 40 weekly hours as gross capacity because federal overtime rules require covered nonexempt employees to receive overtime pay for hours worked over 40 in a fixed 168-hour workweek. That makes 2,080 annual gross hours a common planning baseline before subtracting company PTO, holidays, unpaid leave, or other nonworking time.
Gross capacity works for high-level staffing models. Net working hours work better for performance review because approved absences stop reducing the rate. The FLSA does not require payment for time not worked, including vacations, sick leave, or federal or other holidays, so private-sector paid leave belongs in the denominator only when employer policy, contract terms, or another applicable rule grants it.
Use this formula: utilization rate = billable hours ÷ available hours × 100. If a consultant has 40 scheduled hours and 8 approved PTO hours, the net available denominator is 32 hours. If 24 of those hours are billable, the utilization rate is 75%. At a $135 billing rate, those 24 billable hours carry $3,240 of billable value before discounts or write-downs.
The same 24 billable hours would show 60% utilization against a 40-hour gross denominator. That result is mathematically correct, but it answers a different question. Use gross capacity when you want a staffing-capacity view. Use net available hours when you want to avoid penalizing approved leave, holidays, or qualifying unpaid leave in the utilization percentage.
U.S. federal sources define work-hour and leave rules, but they do not set a professional-services utilization target. BLS classifies workers as full time in CPS statistics when they usually work 35 or more hours per week, but BLS states this is a statistical definition, not a legal one. Set targets by role, service line, margin model, and seniority.
OPM lists 11 federal holidays in 2026, and those are federal employee holidays. Private-sector paid holidays remain a matter of employer policy unless another law or contract applies. BLS reported that private industry workers had 80% access to paid vacation and 81% access to paid holidays in 2025, so many U.S. denominators net out leave even though federal law does not mandate it.
A one-off calculation is enough when you need a quick weekly check, a proposal assumption, or a simple comparison between two staffing scenarios. The result stays reliable when the numerator and denominator come from the same period, the same worker category, and the same leave treatment.
A managed workflow becomes necessary when utilization feeds billing, payroll review, capacity planning, or performance discussions. Everhour Time Off tracks vacations, sick leave, and custom leave types with partial-day durations, accrual and carryover, per-employee balances, capacity-scaled day lengths, and approval status, so approved absences can flow into timesheets and reports before utilization is reviewed.
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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Utilization time is the work you count in the numerator, usually billable client hours or another defined productive category. Internal meetings, training, sales calls, admin work, and rework count only if your firm policy includes them. A finance team should document the included categories before comparing employees or service lines.
Use gross capacity for staffing models and annual planning. Use net available hours for performance review when approved PTO, holidays, unpaid leave, or similar absences should reduce the denominator. OECD defines annual hours actually worked as excluding time not worked because of public holidays, annual paid leave, illness, maternity or parental leave, and similar absences.
A 40-hour weekly capacity baseline equals 2,080 annual gross hours before subtracting company PTO, holidays, unpaid leave, or other nonworking time. That number is common in the United States, but it is an employer policy baseline, not a federal full-time definition. Part-time schedules, custom weekly capacity, and approved leave change the denominator.
Windows settings do not change the formula. They affect the workflow around the calculation. Use side-by-side windows to compare source hours, browser autofill to reduce repeated entries, and Print to PDF to save a dated result. The calculation still depends on billable hours divided by available hours.
The most common mistake is leaving approved absences in the denominator while excluding those same hours from the numerator. A person with 24 billable hours and 8 approved PTO hours should use 32 net available hours if the review is based on available work time. Using 40 gross hours answers a staffing-capacity question instead.
Everhour Time Off tracks vacations, sick leave, holidays, and custom leave types with approval workflows, partial-day entries, accrual, carryover, and capacity-scaled day lengths. Time-off hours can flow into timesheets and reports, giving managers cleaner available-hour totals before utilization is reviewed.
Everhour Reporting turns logged time, budgets, costs, and project data into configurable reports with columns, grouping, filters, date ranges, and exports. Teams can compare billable time, non-billable time, labor costs, and project results without rebuilding the same spreadsheet each review period.
Track approved absences beside work time before utilization becomes a billing or staffing conversation. Everhour Time Off gives teams cleaner available-hour records for utilization review.
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