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Salary, Payroll & Tax

Billable Utilization Calculator

Calculate billable utilization from billable and available hours, and the hours and revenue gap to your target.

Your inputs

Results

Utilization

66.67%

Hours above (−) or below (+) target
150
Revenue gap to target
$15,000.00

✓Exact calculation — rounded only for display

Inputs are never added to links for financial, salary or health calculators.

What this calculator does

Utilization is a core professional-services metric: the share of available time spent on billable work.

Formula and method

Utilization = billable hours ÷ available hours; Gap = available × target − billable; Revenue gap = gap × rate

Worked example

Calculated by this tool with its default inputs:

Inputs

  • Billable hours: 1200
  • Available hours: 1800
  • Target utilization: 75 %
  • Billing rate per hour: 100 (any currency)

Results

  • Utilization: 66.67%
  • Hours above (−) or below (+) target: 150
  • Revenue gap to target: 15,000

How to read the results

A positive gap is the extra billable time needed to hit the target.

Assumptions and limitations

  • Define “available hours” consistently (e.g. excluding holidays).

Tax and payroll figures depend on rules that differ by country, region and year and change often. Enter official current rates, and consult the tax authority or a qualified adviser — nothing here is tax advice.

Questions

Is 100 % utilization the goal?

No — some non-billable time for sales, training and admin is necessary.

Methodology and verification

Result type
Exact mathematical calculation (rounded only for display)
Formula version
1.0
Automated verification
2 reference and validation test cases, checked against independently computed values. The site cannot be built if any of them fail.
Editorial review
Awaiting human editorial review. The explanation was drafted with AI assistance; the formula and examples are verified by the automated tests above.

Privacy

Everything you enter is calculated in this browser and is not sent to Numerith or anyone else. Because this calculator can involve personal financial or health details, your inputs are never added to share links or saved to history. Privacy policy