Billable Hours Calculator: What Your Hours Must Earn
Billable hours are the hours a client actually pays for, and they are always fewer than the hours you work. The gap — proposals, invoicing, admin, unpaid revisions — is the single biggest reason freelance rates come out too low.
Billing 20 of a 40-hour week is 50% utilization. To take home $60,000 across 48 working weeks with $4,000 of overhead, those 960 billable hours have to carry a rate of $82.96.
How it's calculated
Utilization is the ratio of billable hours to hours worked, and it is the number that turns a salary into a freelance rate. Most solo freelancers land between 50% and 70%. Anything above 70% sustained usually means either unusually low admin or hours quietly going unrecorded.
The arithmetic runs in one direction only if you want a rate you can live on: start from take-home, not from an hourly figure you hope sounds reasonable. Take the annual take-home you want, add your business overhead, add the federal self-employment and income tax that profit attracts, and divide by billable hours — your billable hours per week multiplied by the weeks you actually work.
That last term matters more than people expect. A salaried employee is paid for holidays, vacation, and sick days. A freelancer is not, so 52 weeks is never the right figure. Planning on 48 rather than 52 raises the rate you need by about 8%, and planning on 46 raises it by 13%.
Work the example through. Twenty billable hours a week for 48 weeks is 960 billable hours. To clear $60,000 of take-home with $4,000 of overhead requires $79,643 of revenue once federal tax is covered, which divided across 960 hours is $82.96 an hour, or about $664 a day.
Compare that to the salary it replaces and the effect of utilization becomes obvious. An employee taking home the same $60,000 earns about $72,736, which is $34.97 an hour across a standard 2,080-hour year. The freelance rate needed to match it is 2.4 times that. Nothing about the work changed — the multiplier is almost entirely the 50% utilization, plus both FICA halves and unpaid leave.
This is why raising utilization is usually more valuable than raising your rate. Moving from 20 to 25 billable hours a week, without changing your price or your working hours, increases annual revenue by 25%. It is also usually harder than it sounds, because the unbillable time is real work that still has to happen — which is the honest argument for either raising the rate or automating the admin, rather than pretending the hours are not there.
One caveat about tracking. Utilization is only meaningful if you record all your hours, not just the billable ones. A freelancer who logs client work and ignores everything else will calculate a utilization near 100% and set a rate that quietly underpays them for every hour of the rest.
A worked example
A freelancer works 40 hours a week but can bill only 20 of them, giving 50% utilization, and plans to work 48 weeks — 960 billable hours for the year. They want $60,000 of take-home and have $4,000 of overhead in software, insurance, and accounting.
Covering that take-home plus overhead plus federal self-employment and income tax requires $79,643 of revenue, so the rate is $82.96 an hour or $663.69 a day. An employee taking home the same $60,000 would earn a salary of about $72,736, or $34.97 an hour across 2,080 hours.
The freelancer's rate is 2.4× the employee's — and the largest single reason is the 480 hours a year they work but cannot bill.
Common mistakes to avoid
- Dividing a target salary by 2,080 hours. That prices a full year of work as though every hour were billable, and it is the most common way a freelance rate ends up 40% too low.
- Assuming utilization above 70%. Proposals, invoicing, bookkeeping, and unpaid revisions come out of the same week; 50% to 70% is the realistic band for a solo freelancer.
- Planning on 52 working weeks. Nobody pays you for holidays or sick days any more, and each week of unplanned time off is a direct pay cut unless the rate accounts for it.
- Tracking only billable hours. Without recording the unbillable ones you cannot compute utilization at all, and you will overestimate it every time.
- Treating the calculated rate as a price. It is a floor — the point below which the work costs you money. What a client will pay depends on the value of the outcome.
Frequently asked questions
How do I calculate billable hours?
Multiply the hours you can realistically bill in a week by the number of weeks you will actually work. Billable hours exclude proposals, invoicing, bookkeeping, marketing, and unpaid revisions — all real work that no client pays for. Twenty billable hours a week across 48 working weeks is 960 billable hours a year, and that is the figure your entire annual revenue has to be divided across.
What is a good utilization rate for a freelancer?
Between 50% and 70% for most solo freelancers. Below 50% suggests too much time on unpaid business development relative to delivery; sustained above 70% usually means either exceptionally low admin overhead or unbillable hours going unrecorded. If you are new, plan at 50% until you have a few months of tracked hours to test the assumption against.
Why is my freelance rate more than double an employee's hourly pay?
Mostly utilization. An employee is paid for all 2,080 hours of the year; a freelancer is paid only for the billable ones, so at 50% utilization the rate must be roughly double before anything else is counted. Then add both halves of Social Security and Medicare, unpaid holidays and sick days, and overhead the employer used to cover. The multiplier is not a markup — it is the arithmetic of being paid for half your working hours.
Should I raise my rate or bill more hours?
Raising utilization is usually the larger lever and the harder one. Going from 20 to 25 billable hours a week raises revenue 25% without changing your price or your working hours — but the unbillable time is real work that still has to happen, so it only works if you automate or delegate the admin. Raising the rate is easier to execute and does not require finding hours that may not exist.
Do billable hours include revisions and client calls?
Only if you bill for them. Many freelancers include client calls in their rate and absorb revisions, which pushes both into unbillable time and lowers utilization. The cleanest approach is to decide explicitly: either bill them, or count them honestly as unbillable so the rate covers them. What does not work is treating them as free while assuming a high utilization rate.
Sources
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