AI Dispatch ROI Calculator: What's Your Missed-Call Revenue?

Dispatcher’s ROI for most contractors runs between 5x and 15x — meaning every $1 spent on AI dispatch at $2 per answered call and $10 per dispatched job returns $5 to $15 in recovered revenue. That’s not a marketing claim; it’s arithmetic that you can verify with your own numbers in the next five minutes.

The formula is straightforward, and Dispatcher makes the economics work because the cost structure is usage-based rather than fixed. Below is the step-by-step calculation, followed by three real-world scenarios with every number shown.

The ROI Formula: Seven Steps

Step 1: Monthly call volume. How many inbound calls does your business receive per month? Check your phone system logs or estimate from booked jobs. Common ranges: small operations see 50 calls/month, mid-size shops handle 100-150, larger companies field 200+.

Step 2: Missed call rate. Service Direct data shows contractors answer only about 65% of inbound calls — meaning 35% go unanswered. Most contractors believe they answer around 90%. Use your actual data or the 35% industry benchmark.

Step 3: Caller attrition. Of callers who reach voicemail, 78% call the next contractor (Invoca data). They don’t leave a message. They’re gone.

Step 4: Average job value. This varies by trade. Plumbing averages $350-$450. HVAC runs $400-$600. Roofing averages $5,000-$10,000+ with lower frequency.

Step 5: Monthly lost revenue. Monthly calls x miss rate x attrition rate x average job value x booking rate. This is revenue permanently lost each month.

Step 6: Dispatcher cost. Monthly calls x $2 per answered call, plus booked jobs x $10 per dispatched job.

Step 7: Net ROI. Recovered revenue minus Dispatcher cost, divided by Dispatcher cost. Above 1x means Dispatcher pays for itself.

Now let’s run the numbers for three contractor profiles.

Scenario 1: Small Plumbing Operation (50 calls/month)

A two-truck plumbing company receives about 50 inbound calls per month. Between jobs, driving, and after-hours calls, the miss rate tracks the 35% industry average.

The loss calculation:

• 50 calls/month x 35% missed = 17.5 missed calls (round to 18)
• 18 missed calls x 78% attrition = 14 callers gone to competitors
• 14 lost callers x 30% would-have-booked rate = 4.2 lost jobs
• 4.2 lost jobs x $400 average job value = $1,680/month in lost revenue

That’s $20,160 per year walking out the door.

Dispatcher cost with all calls answered:

• 50 calls x $2 = $100
• Assume 30% overall booking rate: 15 jobs x $10 = $150
• Total Dispatcher cost: $250/month

Revenue recovered: Those 4 previously lost jobs are now booked. At $400 each, that’s $1,680/month recovered.

Net ROI: ($1,680 - $250) / $250 = 5.7x return

For every $1 this plumber spends on Dispatcher, $5.72 comes back in revenue that would have gone to a competitor.

Scenario 2: Mid-Size HVAC Company (120 calls/month)

A mid-size HVAC company with 6 technicians fields about 120 calls per month. A part-time office person handles phones, but coverage gaps during lunch, evenings, and weekends push the miss rate to around 30%.

The loss calculation:

• 120 calls x 30% missed = 36 missed calls
• 36 x 78% attrition = 28 callers gone
• 28 x 30% booking rate = 8.4 lost jobs
• 8.4 x $500 average job value = $4,200/month in lost revenue

Annual loss: $50,400. That’s a technician’s salary disappearing into unanswered phones.

Dispatcher cost:

• 120 calls x $2 = $240
• 36 jobs booked (30% of 120) x $10 = $360
• Total: $600/month

Compare that to the $5,000-$7,000/month cost of a human dispatcher who only covers one shift.

Revenue recovered: 8.4 previously lost jobs x $500 = $4,200/month.

Net ROI: ($4,200 - $600) / $600 = 6x return

Dispatcher pays for itself six times over, and the HVAC company saves $4,400 to $6,400 per month compared to hiring a human dispatcher.

Scenario 3: Large Roofing Company (250 calls/month)

A large roofing company running 12 crews fields 250 calls per month. Even with a full-time receptionist, they miss 25% of calls due to simultaneous calls, breaks, and after-hours inquiries.

The loss calculation:

• 250 calls x 25% missed = 62 missed calls (lower miss rate due to dedicated staff)
• 62 x 78% attrition = 48 callers gone
• 48 x 20% booking rate = 9.7 lost jobs (lower conversion rate for high-ticket roofing)
• 9.7 x $7,500 average job value = $72,750/month in lost revenue

Annual loss: $873,000. At this scale, missed calls aren’t a nuisance — they’re a strategic failure.

Dispatcher cost:

• 250 calls x $2 = $500
• 50 jobs booked (20% of 250) x $10 = $500
• Total: $1,000/month

Revenue recovered: 9.7 previously lost jobs x $7,500 = $72,750/month.

Net ROI: ($72,750 - $1,000) / $1,000 = 71.75x return

The higher job value in roofing makes the ROI extraordinary. Even if you cut the assumed recovery rate by 75%, the ROI is still over 17x.

Assumptions and Honest Caveats

Dispatcher delivers clear positive ROI across all three scenarios, but here’s what these calculations assume — and where your numbers may differ.

The 35% missed call rate is an industry average — yours may differ. The 78% attrition number comes from Invoca’s research across service industries. The booking rates used (20-30%) are conservative; some contractors convert higher.

Dispatcher books jobs into your FSM (Jobber is live today, with HouseCall Pro and ServiceTitan coming soon) and works with AI Voice platforms including GoHighLevel, Vapi, and Bland through BYOV (Bring Your Own Voice) integration. If your operation requires complex quoting, multi-trade coordination, or outbound sales calls, those fall outside what Dispatcher handles.

Run Your Own Numbers

The formula fits on a napkin: monthly call volume times miss rate times 78% attrition times average job value. That’s your monthly loss. Compare it to Dispatcher’s cost at $2 per call plus $10 per job. For most contractors, the question isn’t whether AI dispatch delivers ROI — it’s how much revenue you’re losing every month you wait.

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