Play 7 ROI Calculator

This calculator translates email volume into recovered billable capacity. Input four numbers, get a dollar figure that justifies your AI investment to the CFO.

Most partners spend 8-12 hours per week on email. That's 400-600 hours per year per partner - roughly 25% of their billable capacity - lost to inbox management.

This calculator shows you exactly how much capacity you recover when an AI assistant handles email drafting, follow-ups, and routine correspondence. You'll get three outputs:

1. Hours recovered annually across your partner group
2. Full-time equivalent (FTE) capacity gained
3. Revenue potential at your current billing rates and utilization

Use these numbers in your business case, budget request, or partnership meeting.

Gather these four data points before you start:

1. Number of Partners

Count every equity partner, income partner, and senior counsel who bills at partner rates. Don't include associates or staff attorneys.

2. Emails Sent Per Week

Pull this from your email server analytics. Most firms use Microsoft 365 or Google Workspace - both provide sent-item counts per user.

If you don't have access to server data, survey 10 partners and average their responses. Typical range: 80-150 emails per week for client-facing partners.

3. Minutes Per Email

Time-tracking data is ideal, but rare. Use this benchmark instead:

• Quick replies and forwards: 2 minutes
• Standard client updates: 5 minutes
• Complex explanations or negotiations: 15 minutes

Weighted average for most practices: 6 minutes per email.

4. Average Billing Rate

Use the blended rate across all partners. If your rates range from $450 to $750, and you have equal distribution, use $600.

For firms with tiered partnerships, weight by headcount at each tier.

Here's the math behind the outputs. You can replicate this in Excel or Google Sheets.

Step 1: Annual Email Volume

Total Emails = Partners × Emails/Week × 52 weeks

Example: 25 partners × 100 emails/week × 52 = 130,000 emails/year

Step 2: Time Spent on Email

Total Hours = (Total Emails × Minutes/Email) ÷ 60

Example: (130,000 × 6 minutes) ÷ 60 = 13,000 hours/year

Step 3: AI Efficiency Factor

An AI email assistant doesn't replace 100% of email time. It handles:

• First drafts (saves 60% of drafting time)
• Follow-up sequences (saves 80% of time)
• Routine confirmations (saves 90% of time)

Blended efficiency: 50% time reduction across all email types.

Hours Recovered = Total Hours × 0.50

Example: 13,000 hours × 0.50 = 6,500 hours recovered

Step 4: FTE Capacity Gained

Assume 1,800 billable hours per partner per year (standard for most firms).

FTE Capacity = Hours Recovered ÷ 1,800

Example: 6,500 ÷ 1,800 = 3.6 FTE partners

Step 5: Revenue Potential

Apply your utilization rate (percentage of available hours actually billed). Industry average: 75-80%.

Revenue Potential = Hours Recovered × Billing Rate × Utilization Rate

Example: 6,500 hours × $600/hour × 0.75 = $2,925,000

Small Firm (10 Partners)

• Emails/week: 80
• Time/email: 5 minutes
• Billing rate: $500
• Result: 1.7 FTE recovered, $637,500 revenue potential

Mid-Size Firm (50 Partners)

• Emails/week: 120
• Time/email: 6 minutes
• Billing rate: $650
• Result: 10.8 FTE recovered, $5,265,000 revenue potential

Large Firm (150 Partners)

• Emails/week: 100
• Time/email: 7 minutes
• Billing rate: $750
• Result: 28.4 FTE recovered, $16,012,500 revenue potential

The default 50% efficiency factor is conservative. Adjust based on your email composition:

Increase to 60% if:

• High volume of routine client updates
• Frequent scheduling and confirmation emails
• Standard engagement letters and follow-ups

Decrease to 40% if:

• Highly technical or specialized practice area
• Extensive negotiation via email
• Regulatory or compliance-heavy correspondence

Utilization Rate Reality Check

Don't use aspirational utilization. Use actual performance from last year's financials. If your partners averaged 70% utilization, use 70% in the calculator - not the 85% target from your strategic plan.

Present the calculator results this way:

For the Managing Partner: "We're leaving $2.9M on the table annually. An AI email assistant recovers 6,500 billable hours - equivalent to hiring 3.6 partners without the overhead."

For the CFO: "Implementation cost: $75K annually. Revenue potential: $2.9M. ROI: 3,780%. Payback period: 9 days."

For the Partnership: "Each partner gets back 260 hours per year. That's 6.5 weeks of capacity for client work, business development, or personal time."

Your ROI calculation should account for:

• AI assistant subscription: $50-150/user/month ($15K-45K annually for 25 partners)
• Integration and setup: $10K-25K one-time
• Training and adoption: 4 hours per partner ($15K-30K opportunity cost)

Total first-year cost: $40K-100K depending on firm size and solution chosen.

Even at the high end, you're looking at 30:1 return in year one.

[Access the Play 7 ROI Calculator spreadsheet here - includes all formulas and sample scenarios]

The spreadsheet includes:

• Pre-built formulas for all calculations
• Sensitivity analysis (adjust efficiency from 30-70%)
• Three-year projection with adoption curve
• Cost comparison vs. hiring additional partners

Input your numbers in the yellow cells. Outputs auto-calculate in green.

If ROI exceeds 10:1: You have a slam-dunk business case. Schedule a partnership vote within 30 days.

If ROI is 5:1 to 10:1: Strong case, but identify which practice groups benefit most. Pilot with highest-volume partners first.

If ROI is below 5:1: Your email volume may not justify a firm-wide rollout. Consider deploying only for partners handling 150+ emails/week, or focus on other plays first.

The calculator gives you the numbers. Your job is to turn those numbers into a decision.