Who this free billable hours calculator is for
Freelancers & consultants
The Billable revenue and Ideal hourly rate calculators help you price for actual profitability. Factor in non-billable hours, taxes, and overhead to arrive at a rate that holds up. Need a simple and reliable time billing software that works across multiple clients and projects? Toggl lets you track billable time in one click and turn those hours into invoices without manual work.
Law firms & legal professionals
The 6-minute billing tool tracks time entries in tenths of an hour — the billing increment standard used across law firms, federal courts, and accounting practices. Log multiple matters per day, separate billable from non-billable work, and export results as a CSV. Need dedicated time tracking for lawyers? Toggl integrates into your workflow without disrupting it.
Agency teams & employees
The Weekly billing & earnings tool works as a straightforward timesheet — log clock-in and clock-out times for each workday, and it handles breaks, overtime, and total hours worked automatically. Need employee time tracking at scale? Toggl gives team leads visibility into billable hours across every project — without invasive monitoring or surveillance.
How to calculate billable hours
To calculate billable hours, add up your total hours worked on client work, remove the non-billable hours, and multiply the result by your billable rate. The core formula is: Billable Amount = Billable Hours × Hourly Rate.
However, this formula doesn't tell you where things might be going wrong or how you can improve profitability. For that, most professionals look at three other metrics:
Utilization rate
Billable Hours ÷ (Billable + Non-Billable Hours) × 100
The share of your total work hours that are revenue-generating.
Effective hourly rate
Total Billable Revenue ÷ Total Hours Worked
Your actual earnings per hour after accounting for all time worked — including non-billable hours. If you bill $150/h but spend a third of your workday on admin, your effective rate is closer to $100/h.
Total billable revenue
Billable Hours × Hourly Rate − Discount + Expenses
The total invoiceable amount for a given period. Use it to benchmark against billable hour targets and assess profitability.
Billable time vs. non-billable time: what's the difference?
Not all work hours are created equal. Billable time covers the work you can charge clients for directly — executing deliverables, attending client meetings, conducting research, reviewing documents. Non-billable time covers everything that keeps your business running but doesn't appear on an invoice: internal meetings, administrative tasks, new business pitches, employee training, and time spent managing timesheets themselves.
The distinction matters enormously for profitability. If you spend 10 hours on client work and 6 hours on administrative work in a workweek, your utilization rate is 63% — meaning over a third of your available capacity is generating zero billable value.
Billable work (chargeable)
- Client deliverables — design, writing, code, legal drafts
- Client meetings, calls, and communications
- Project management for client projects
- Research and analysis for client work
- Court appearances and depositions
- Document review and preparation
Non-billable work (overhead)
- Internal meetings and team check-ins
- Administrative tasks and timesheet entry
- Business development and proposals
- Employee training and onboarding
- Marketing and networking
- General office and operational overhead
Many professionals — especially those still using spreadsheets or piecing together timesheets at the end of the day — systematically undercount non-billable hours. The result is an inflated utilization rate, a distorted view of profitability, and billing rates that don't reflect what the work actually costs. Switching to automatic time tracking software solves this at the source: you log billable and non-billable work as it happens, and the split is always accurate.
How to set your billable rates for profitability, not just coverage
Most freelancers set their hourly rate by dividing their target annual income by 2,080 — the standard 52-week, 40-hour-a-year figure. This approach ignores four factors that dramatically affect your real billing rate:
- Non-billable hours. Only 50–70% of a typical workday is billable to clients. The rest is business development, administrative work, internal meetings, and learning — none of which appears on an invoice but all of which consumes your time.
- Self-employment taxes. Freelancers pay both the employer and employee portion of payroll taxes — around 15.3% in the US before income tax. This is a cost employees never see in their paycheck but independent workers absorb entirely.
- Business expenses. Software subscriptions, insurance, equipment, accounting, and professional memberships add up. These must be covered by billable revenue before you take home anything.
- Time off. A freelancer taking four weeks off per year loses four weeks of billable income. That gap must be priced into your billing rates across the weeks you do work.
The Ideal hourly rate calculator above accounts for all of these. It computes your break-even rate — the minimum needed to hit your income goal given your real billable hours — and adds a 20% buffer, which is the industry standard cushion for scope creep, slow periods, and unexpected overhead.
Use this calculator before quoting any new client engagement, especially if you're moving from a per-project to an hourly pricing model. The numbers may surprise you.
Legal billing practices: why 6-minute increments are the standard
Law firms and legal professionals have long used 6-minute billing increments — tenths of an hour — as the industry standard for tracking time entries. The logic is straightforward: whole-hour billing loses money on short tasks like a 4-minute email or an 8-minute phone call, while per-minute tracking creates unmanageable administrative overhead. Six-minute increments hit the sweet spot.
Why it matters for revenue
Billable hour targets in large law firms typically range from 1,800 to 2,200 hours per year. Meeting those targets requires recording time entries as they happen — relying on memory to reconstruct them at the end of the day leads to systematic undercounting. Missing even 15 minutes of billable time per day adds up to thousands in lost revenue across a year at standard billing rates.
The CJA billing standard
The 6-minute billing tool in this calculator is modeled on the CJA billing increment chart published by the U.S. District Court for the Northern District of California — the same standard used across federal courts and most private law firms. Each tenth of an hour equals exactly 6 minutes, and any task is rounded up to the nearest tenth regardless of how short it was.
Ready to stop guessing and start scaling with purpose?
Toggl lets you easily track billable time with one click across multiple projects, tasks, and clients. Set billing rates per project, generate reports, and turn tracked hours into invoices — all in one place.
