PSA Business Case

Services firms lose 15–20% of billable hours to spreadsheets and chat threads every month

When time is logged in personal notebooks, WhatsApp threads, or memory at the end of the week, some of it never makes it onto an invoice. This is the single largest source of preventable revenue loss for professional services firms.

For consulting, IT services, agencies, legal, and staffing firms billing hourly or T&M

Annual revenue leakageA × B × C × D × E$103,680/year
01How the Cost Is Created

Where billable hours actually disappear

  1. 01

    Work happens across scattered channels

    A quick Slack message, a WhatsApp call, an unplanned 20-minute favor - none of it touches a timer.

  2. 02

    Time gets reconstructed from memory at week's end

    Without real-time capture, Friday-afternoon timesheet entry becomes a guessing exercise.

  3. 03

    People round down "to be safe"

    Uncertain about exact time spent, most people underestimate rather than risk overbilling a client.

  4. 04

    No approval workflow catches the gap

    A manager approving a vague weekly total has no way to know which hours were missed.

  5. 05

    The invoice reflects only what was remembered

    By the time billing happens, the gap between hours worked and hours billed is already locked in.

02The Financial Model

How the leakage adds up, with a worked example

Team size (billable staff)
20A
Avg. billable hours/week per person
30 hrsB
Working weeks/year (accounting for leave)
48C
Average hourly bill rate
$120/hrD
Estimated % of billable hours lost
15%E
Annual revenue leakageA × B × C × D × E =$103,680/year
03Calculate Your Own Number

What is this costing your firm?

Unbilled Hours Calculator - Adjust the numbers below to match your firm

Estimated Annual Revenue Leakage
$518,400
≈ $43,200 per month
04Before vs. After

What changes when time is captured in real time

  • Billable hours capturedManual process: 80–85%With CrmLeaf PSA: 97%+
  • Time to reconcile weekly timesheetsManual process: ~3 hrs/weekWith CrmLeaf PSA: ~15 min/week
  • Time entry methodManual process: End-of-week memoryWith CrmLeaf PSA: Real-time, per task
  • Manager visibility into gapsManual process: None until invoicingWith CrmLeaf PSA: Real-time dashboard
  • Approval workflowManual process: Manual, spreadsheet-basedWith CrmLeaf PSA: Automated, routed to PM
  • Time-to-invoice after work completionManual process: 2–3 weeksWith CrmLeaf PSA: 2 days
Average Time to ROI
18days

Average time for firms to reach measurable ROI from trial start - most of the calculated leakage above is typically recovered well within the first billing cycle.

05Keep Exploring

Related business cases

  1. 01Cost of Unbilled HoursCurrently Reading
  2. 02Cost of Delayed Invoicing
  3. 03Cost of Resource Conflicts
  4. 04Cost of Manual Multi-Region Billing
  5. 05Cost of Disconnected PSA Tools

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