Free billable hours calculator. Track billable vs non-billable hours, calculate utilization rate, project monthly and annual revenue from your hourly rate, and export invoice-ready totals.
Enter your total working hours for the period — this is the total time you spend at work, including both billable and non-billable activities.
Enter your non-billable hours — time spent on admin, internal meetings, training, business development, and other non-client work.
Enter your hourly billing rate to calculate billable revenue for the period.
Set your target utilization rate — law firms typically target 75–85%, consultants 65–75%.
Click Calculate to see your billable hours, utilization rate, revenue, and gap from your target.
Utilization rate measures the percentage of total working time that generates client revenue. Law firms and consulting firms typically track this as a key performance indicator. A utilization rate below 65% indicates too much non-billable overhead, while above 85% can lead to burnout.
40 total hours. 10 non-billable (meetings, admin, proposals). 30 billable hours. Utilization: 75%. At $200/hr: $6,000/week billable revenue. Annual: $300,000.
50 total hours. 8 non-billable (firm management, CLE, admin). 42 billable hours. Utilization: 84%. At $350/hr: $14,700/week. Annual: $735,000.
160 total hours. 40 non-billable (admin, marketing, client acquisition). 120 billable hours. Utilization: 75%. At $85/hr: $10,200/month. Annual: $122,400.
Find answers to the most common questions about billable hours calculator.
A billable hour is time spent directly on client work that can be invoiced. This includes meetings with clients, research, drafting, design work, coding, and other deliverables. Non-billable time includes internal meetings, business development, training, and administrative tasks.
Target utilization rates vary by profession: Law firms: 75–85% for associates, 60–70% for partners. Consulting: 65–75%. IT consulting: 70–80%. Freelancers: 60–70% (since you handle your own business development). Below 60% typically means too much overhead.
Most law firms use time-tracking software (Clio, TimeSolv, MyCase) where attorneys log time in 6-minute increments (0.1 hour). Partners set annual billable hour targets — typically 1,800–2,200 hours per year for associates. Performance reviews and bonuses are often tied to billable hour targets.
Delegate administrative tasks, automate invoicing and scheduling, use templates for proposals and contracts, set clear office hours, batch non-billable tasks to specific time blocks, and track time in real-time rather than reconstructing it from memory at day-end.
Calculations and computational models on QuickBizCalc are verified against published regulatory standards and statutory tax tables:
Publication 15-T (Federal Income Tax Withholding Methods) & Publication 15 (Employer's Tax Guide).
Fair Labor Standards Act (FLSA 29 U.S.C. § 207) regulations on overtime hours, recordkeeping, and minimum wage.
OASDI taxable maximum wage base limits and statutory FICA tax rates (6.2% Social Security + 1.45% Medicare).
Formulas and worked examples are checked against the sources above before publishing. For advice on your own situation, consult a licensed tax professional or accountant.
Admin, meetings, training, proposals
Leave blank to calculate hours and utilization only
