Transparent method
The formula
Worked example
Example inputs
How to interpret the result
A revenue target translated into required billable hours can demand a utilization rate that's simply not achievable in practice, since real weeks include sales calls, admin and gaps between projects that eat into available hours before a single billable one gets logged.
Before you rely on it
What to check
Compare the required utilization percentage against your realistic, historical billable-hour pattern, not against a theoretical full workweek.
The common error
Where people go wrong with billable hours calculator
Setting a revenue target without checking whether the implied utilization rate is operationally realistic. A target requiring 90% utilization when your actual historical rate runs closer to 60% needs a different rate or a different target, not just more hustle.
Sensitivity evidence
How average hourly rate changes the required annual billable hours
| Average hourly rate | Required annual billable hours | Required utilization |
|---|---|---|
| $120 | 1250.0 hours | 65.1% |
| $135 | 1111.1 hours | 57.9% |
| $150worked example | 1000.0 hours | 52.1% |
| $165 | 909.1 hours | 47.3% |
| $180 | 833.3 hours | 43.4% |
Every input, tested
Which input moves the required annual billable hours most
| Input | Tested from | To | Required annual billable hours at each end | Swing |
|---|---|---|---|---|
| Annual revenue target | $135,000 | $165,000 | 900.0 hours to 1100.0 hours | 200.0 hours (20%) |
| Average hourly rate | $135 | $165 | 1111.1 hours to 909.1 hours | 202.0 hours (20%) |
| Working weeks | 43 | 53 | 1000.0 hours to 1000.0 hours | none |
| Available hours per week | 36.0 hours | 44.0 hours | 1000.0 hours to 1000.0 hours | none |
Two variables at once
Required annual billable hours by average hourly rate and annual revenue target
| Average hourly rate \ Annual revenue target | $120,000 | $150,000 | $180,000 |
|---|---|---|---|
| $120 | 1000.0 hours | 1250.0 hours | 1500.0 hours |
| $135 | 888.9 hours | 1111.1 hours | 1333.3 hours |
| $150 | 800.0 hours | 1000.0 hours | 1200.0 hours |
| $165 | 727.3 hours | 909.1 hours | 1090.9 hours |
| $180 | 666.7 hours | 833.3 hours | 1000.0 hours |
Step by step
The worked example, input by input
| Input | Value used |
|---|---|
| Annual revenue target | $150,000 |
| Average hourly rate | $150 |
| Working weeks | 48 |
| Available hours per week | 40.0 hours |
| Required annual billable hours | 1000.0 hours |
| Required utilization | 52.1% |
Where the inputs come from
Annual revenue target is the income you want from billing, hourly rate is your average rate across clients, working weeks is the number of weeks you plan to work after vacation and holidays, and available hours per week is the total time you devote to the business, not just billing. Use your actual average rate, including discounts and lower-priced clients. Track your last year's billed hours if you can, since most people overestimate them.
When the result stops applying
The calculation treats every hour as billable at the same rate, while real work mixes rates and unpaid tasks. Utilization near 100% is unrealistic. Clients pay late and projects overrun, which reduce revenue for the same hours. Setting hours from a revenue goal does not guarantee clients exist to fill them.
What to compare it with
Set the rate with the freelance hourly rate calculator, and check profitability of individual jobs on the project profitability page. The W-2 versus 1099 and benefits gap calculators compare employment. The break-even calculator helps if the business has fixed costs.
People also ask
Frequently asked questions
What is billable utilization?
The share of your working hours that you bill to clients. Many freelancers and consultants average 50% to 70%, with the rest spent on sales, admin and training.
How do I raise my income without working more hours?
Raise your rate, package services into fixed-price projects, focus on higher-value clients or add capacity through subcontractors.
Should I track my time?
Yes, even for fixed-price work, since it shows your real utilization and which jobs are profitable.