Developed and maintained by ProWorkstack · Development and review process
See what unrecorded billable time could be worth, then compare how much of it your firm might recover.
Read the guide: Unrecorded Billable Hours: Estimate Work Your Firm Could Invoice
Your results
Enter your inputs and select Calculate.
How this calculator works
Potential annual billable value = attorneys × potential hours per attorney × hourly rate. Unrecorded value = potential value × unrecorded percentage. Estimated invoice opportunity = unrecorded value × the assumed percentage that can be invoiced percentage for recovered time.
percentage that can be invoiced means the percentage of recorded billable value that reaches an invoice. This calculation applies it only to the recovered time, so it does not count all percentage that can be invoiced shortfalls as time leakage.
Worked example
8 attorneys × 1,700 hours × 350 = 4,760,000 in potential billable value. At 6% unrecorded time, 285,600 is unrecorded at face value. With 92% percentage that can be invoiced, the estimated annual invoice opportunity is 262,752. Recovering 25% yields 65,688 per year.
Assumptions
Defaults are an illustrative scenario, not a benchmark. Rates and hours are blended across attorneys. The recovered work is billable and can still be invoiced. The percentage that can be invoiced assumption is independent of recording loss.
Interpreting your results
This is potential invoice value, not guaranteed collected cash or profit. Apply collection probability, additional labor, implementation cost and recovery timing before deciding what to spend. If your hours input contains only recorded hours, first reconstruct an estimate of total eligible work.
Calculation formulas
- potential_revenue
attorneys * annual_hours * hourly_rate- unrecorded_value
potential_revenue * unrecorded_pct / 100- annual_leakage
unrecorded_value * realization_pct / 100- Estimated annual invoice opportunity
annual_leakage- Monthly equivalent
annual_leakage/12- Unrecorded time at full rates
unrecorded_value- 25% recovery: annual spending ceiling
annual_leakage * 0.25
Frequently asked questions
Is the result money already lost?
No. It is estimated invoice opportunity from estimated unrecorded work. Some time may no longer be recoverable and some invoices may not be collected.
Are the default percentages industry benchmarks?
No. All defaults are examples. Replace them with your own measured data.
Sources and definitions
Maintained by ProWorkstack · Last reviewed: 2026-10-04 · Development and review process