What is time leakage?

Time leakage occurs when billable work is performed but not captured in time-tracking systems, resulting in unbilled revenue. Common causes include consultants forgetting to log time, rounding down hours, failing to track small tasks, and administrative gaps in time entry. For professional service firms, time leakage typically ranges from 5% to 15% of potential billable hours, representing significant lost revenue. Reducing time leakage is often the fastest path to improved profitability.

Key characteristics

• Billable work performed but not recorded or billed

• Typical range: 5-15% of potential billable hours

• Causes: forgotten entries, rounding, and administrative gaps

• Often invisible until a systematic analysis is conducted

• Compounds with a billing rate that creates significant revenue loss

• Addressed through policy, technology, and culture changes

Why it matters for professional service firms

Time leakage is invisible revenue loss. A consultant working 1,800 billable hours annually with 10% leakage loses 180 hours. At $175/hour, that's $31,500 in unbilled work per consultant. A 10-person firm with similar leakage loses $315K annually, often the difference between strong profitability and marginal performance. Because leaked time is never captured, most firms don't know the magnitude of their problem. Systematic time tracking analysis typically reveals leakage far exceeding expectations.

Real-world example

Michael's IT consulting firm analyzed time leakage for the first time. Method: compared consultant calendar appointments and project artefacts against time entries. Findings: average 12% leakage across the team. Top sources: client calls under 15 minutes not logged (4%), email time on client matters not tracked (3%), travel time treated as non-billable (2.5%), and forgotten same-day entries (2.5%). At a $160an average billing rate of $160 and 14,000 annual billable hours, 12% leakage represented $269K in unbilled work. Remediation: mandatory daily time entry, minimum billing increment policy (15 minutes), and travel time billing policy. Year 2 leakage dropped to 5%, recovering $157K in previously lost revenue.