Billable Hours Tracker Calculator

Billable hours targets determine the revenue a consultant, freelancer, attorney, accountant or service professional generates, and the utilization rate they have to hit to meet their financial goals.
The calculator above works forwards: give it your weekly hours, your rate and your utilization, and it tells you the revenue. The worked example further down works backwards from an income target to the rate you would have to charge, which is the same arithmetic rearranged.

Annual revenue formula: Annual Revenue = Billable Hours × Hourly Rate

Required billable hours from revenue target: Required Hours = Target Annual Revenue ÷ Hourly Rate

Utilization rate: Utilization Rate (%) = (Billable Hours ÷ Total Working Hours) × 100

Total working hours per year (standard): 52 weeks × 40 hours = 2,080 hours Minus: ~10 vacation days (80h) + ~10 federal holidays (80h) + ~5 sick days (40h) = 1,880 available hours

Realistic billable utilization by profession:

• Solo consultants / freelancers: 50–65% utilization (940–1,220 billable hours/year)
• Agency professionals (billed to clients): 70–80% (1,316–1,504 hours/year)
• Law firms (associates): 1,800–2,200 billable hours/year target (very high pressure)
• Accounting (busy season peaks): 55–70% annual utilization

Non-billable time, which is what eats the other hours:

• Business development / sales: 10–20%
• Administration, invoicing, email: 10–15%
• Training and professional development: 5–10%
• Networking and marketing: 5–10%

Effective hourly rate (accounting for non-billable time): Effective Rate = Total Revenue ÷ Total Hours Worked

This is always lower than your billing rate, and the gap is bigger than people expect. At 60% utilization a $150 rate is really $90 an hour across the hours you actually work. Quote against the $150 and you will underprice by a third without ever noticing.

Gross profit per billable hour: Gross Profit per Hour = Hourly Rate − Hourly Cost of Delivery

For solo practitioners: cost = hourly overhead (office, software, insurance ÷ working hours) + self-employment tax impact.

Worked example: Freelance web developer. Target annual income: $120,000. Overhead costs: $15,000/year. Hours available: 1,880.

• Target revenue needed: $120,000 + $15,000 = $135,000
• At 60% utilization: 1,880 × 0.60 = 1,128 billable hours/year
• Required rate: $135,000 ÷ 1,128 = $119.68/hour → charge $120+/hour
• Daily billable target: 1,128 ÷ 250 working days = 4.5 billable hours/day

To check that on the calculator above, enter 40 hours a week, a $120 rate and 60% utilization. It returns $2,880 a week, which is $149,760 a year, comfortably over the $135,000 target because 52 weeks is more generous than the 47 working weeks the 1,880-hour figure assumes.

Four and a half billable hours out of an eight-hour day sounds low until you try it. Sales calls, proposals, invoicing, email and the twenty minutes lost every time you switch projects are all real work and none of it is billable.

This page starts from a utilization percentage and works forwards to revenue. If you already know your billable hours and want the invoice, plus a retainer balance and a realization figure for what actually gets collected, the legal billable hours calculator goes the other way. It is written around law-firm billing but the arithmetic suits any hourly practice, and both pages give the same effective rate.