How To Calculate Billable Hours Minus Admin Work
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Want to crunch the numbers yourself? Use these free tools:
- Freelance Income Calculator — Freelance Income Calculator
- Hour to Decimal Converter — Hour to Decimal Converter
- Hourly to Salary Quick Converter — Hourly to Salary Quick Converter
The Core Formula
Formula = Billable Hours ÷ Total Worked Hours × 100 = Utilization Rate (%)
Billable Hours = Total Hours Worked − Admin Hours − Marketing Hours − Unpaid Client Communication
Admin hours are anything you cannot directly invoice to a client: bookkeeping, invoicing, taxes, software updates, learning, prospecting, and that endless email graveyard.
Step-by-Step: How To Calculate Billable Hours By Hand
Let’s walk through a normal week. Say you’re a freelance graphic designer charging $65/hr.
- Log every hour worked, billable or not, for one full week. Use a spreadsheet, a notebook, whatever. Just be honest.
- Sort each block into one of three buckets: Billable, Admin, or Marketing/Business Development.
- Subtract admin and marketing from total hours to isolate billable time.
- Multiply billable hours by your hourly rate for gross weekly billings.
- Divide billable by total for your utilization rate.
Worked example for one week:
| Category | Hours | Notes |
|---|---|---|
| Client design work (billed) | 24 | Two active projects |
| Client revision rounds | 6 | Billed per SOW |
| Email & Slack (unpaid) | 4 | Scope clarifications |
| Invoicing & bookkeeping | 2 | QuickBooks, chasing one late payer |
| Marketing & portfolio updates | 4 | LinkedIn, case study |
| Total worked | 40 | Standard week |
Billable = 24 + 6 = 30 hours. Admin = 4 + 2 = 6. Marketing = 4. Check: 30 + 6 + 4 = 40. Good.
Utilization = 30 ÷ 40 × 100 = 75% for the week. At $65/hr, gross billings = 30 × $65 = $1,950.
So what does that mean for you? If you projected 40 billable hours at $65, you’d have expected $2,600. The real number is $650 lower. Multiply that gap across a year and you’ll see why freelancers underprice themselves.
A buddy of mine who runs a one-person copywriting shop did this exercise last spring and realized his “85% utilization” claim was actually 58%. He raised rates 15% the next month and nobody blinked.
2026 Real Case: Pricing A Remote Design Retainer
Let’s look at a realistic 2026 scenario. Maria is a freelance UX designer in Ohio billing $75/hour. She wants to know what she can actually earn in a year after admin is stripped out.
Assumptions:
- 2,080 total work hours (40 × 52, the standard US year)
- 6 weeks off for vacation, sick, and holidays = 240 hours off
- Working hours left: 1,840
- Realistic utilization: 65% (industry-typical for solo freelancers)
Billable hours = 1,840 × 0.65 = 1,196 billable hours/year Gross billings = 1,196 × $75 = $89,700
Plug those numbers into the freelance income calculator to subtract self-employment tax, business expenses, and income tax. The net is usually a sobering 55 to 65 cents on every gross dollar.
For converting your raw timesheet minutes into clean decimal hours before invoicing, the hour-to-decimal converter saves you the mental math. And if you’re weighing freelance against a salaried offer, the hourly-to-salary calculator gives you an apples-to-apples annual figure.
Want a deeper look at 1099 net income math? Read our freelancer 1099 net income calculation guide 2026. It pairs well with our piece on setting an hourly rate for remote freelance projects.
Annual Billable Hours Benchmarks
Use this table to sanity-check your own utilization against common freelancer patterns.
| Freelancer Profile | Total Hrs/Yr | Utilization | Billable Hrs/Yr | Gross @ $75/hr |
|---|---|---|---|---|
| Full-time, no breaks | 2,080 | 70% | 1,456 | $109,200 |
| Full-time, 4 wks off | 1,920 | 65% | 1,248 | $93,600 |
| Part-time parent, 25 hrs/wk | 1,300 | 60% | 780 | $58,500 |
| New freelancer, ramping | 1,800 | 45% | 810 | $60,750 |
Where do people mess this up? They use the top row as their forecast. Honestly, the second row is far more typical, and the fourth row is what your first year actually looks like.
Frequently Asked Questions
How many billable hours can a freelancer realistically work in a week?
Most full-time freelancers bill 20 to 30 hours per week. The rest goes to admin, marketing, and unpaid client communication. Anyone claiming 40 billable hours is probably leaving money on the table or burning out.
Should I count email and client meetings as billable?
Only if your contract says so. Quick clarification emails are usually admin, but project-scoping calls and revisions can be billable if you spell that out up front. Put it in the SOW so there is no debate later.
What is a good utilization rate for a solo freelancer?
Somewhere between 55% and 70% is healthy. Below 50% and you are spending too much time on non-billable work. Above 75% and you likely have no time to market or run the business, which catches up with you.
Do unpaid admin hours affect my taxes as a 1099 contractor?
Not directly. The IRS taxes your net profit, not your hours. But tracking admin time helps you price correctly so you actually earn enough to cover self-employment tax and quarterly estimates.
The Bottom Line
Billable hours are not the hours you work — they’re the hours you can invoice. Track admin honestly, run the utilization formula weekly, and price your freelance income against real billable time, not wishful thinking. The freelancers who get this right are the ones still in business three years from now.