Lead Response Time Calculator
See how much revenue you lose every month by responding to leads slowly. The numbers are brutal.
Harvard Business Review found that leads contacted within 5 minutes are 100x more likely to convert than leads contacted within 30 minutes. Conversion drops ~80% after the first hour. Most service businesses reply in 12-48 hours. This calculator shows you what that lag is actually costing you in real dollars per year, plus what changes when you cut your response time to under 5 minutes.
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Quick startPick your industry to load real-world numbers
Your inputs
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Calls + form fills + missed calls + DMs. Anything where someone reaches out asking about your service.
Honest estimate. Most owners say 'an hour' but data says 12-24 hours is the real norm for SMBs.
Of the leads you actually respond to, what % become paying jobs?
A repeat customer is worth this many times the first job. 1 = no repeat business, 3+ = strong repeat business.
Lead Response Time Calculator
Calculated October 9, 2026
- New leads per week
- 25
- Current average response time (minutes)
- 240
- Current close rate on leads you DO contact (%)
- 25%
- Average job value
- $425
- Repeat customer LTV multiplier
- 2.5
Your results
Revenue you'd recover with 5-min response
$759,688
Annual, including repeat customer LTV
Above healthy range
Under $15K/yr in lost revenue means you're already responding fast (under 30 minutes on average).
HBR / InsideSales lead-response data, n=1.25M tracked leads
Where this number comes from
Responding to a new lead within 5 minutes makes you many times more likely to qualify it than waiting even 30 minutes. Speed-to-lead is one of the most studied levers in sales response.
Harvard Business Review, The Short Life of Online Sales Leads (2011), and the Lead Response Management study
Respond in under 60 seconds, every time
Smarfle's AI Receptionist answers calls 24/7, and Workflow Automation auto-texts every form lead within 30 seconds. Your average response time drops from hours to seconds.
Free for 14 days, no credit card
How this calculation works
Lead conversion follows a steep decay curve. The HBR / InsideSales data on 1.25M tracked leads: - Respond in 1-5 minutes: baseline conversion (call it X%) - Respond in 30 minutes: ~21% of baseline - Respond in 1 hour: ~10% of baseline - Respond in 24 hours: ~2% of baseline The intuition: the moment a prospect submits a form or hangs up an unanswered call, they don't sit and wait. They contact your competitor. By the time you respond an hour later, they've already booked someone else, and your reply lands cold. This calculator models that decay against your real numbers: weekly lead volume, current response time, current close rate, average ticket. The "recovered revenue" line is what you'd add to your top line by cutting response time to under 5 minutes (e.g. via AI Receptionist that picks up immediately + auto-reply SMS that fires within 30 seconds of any form submit). The math caps the projected 5-min close rate at 80% (no service business closes everything). Most service businesses see 2-4x improvement.
Real scenarios
Find the persona closest to yours, then click to load those numbers into the calculator.
Solo HVAC, mostly in the field
25 leads/week, current response 4 hours, $450 avg ticket.
Loses ~$80K/year vs. responding in 5 minutes. AI Receptionist + auto-text closes most of that gap with no extra labor.
Cleaning company with recurring plans
Recurring services compound, repeat LTV is 6x first job.
Slow response costs more here because the lost customer represents ~$1,080 in long-term value, not just the $180 first job.
Already 'fast' (30 min avg)
30-minute response feels fast, but data says 5 min is the bar.
Even cutting from 30 minutes to 5 minutes adds 30-40% close rate. Most owners stop optimizing at 'fast enough'.
Smarfle
Run this in your business, not just in a calculator
These Smarfle features close the loop on what this tool surfaces. Built for local service businesses, used by HVAC, plumbing, electrical, cleaning, lawn care, and 40+ other trades.
AI Receptionist
Picks up every call within 1 ring, 24/7. Books the appointment live. Your response time drops from hours to seconds.
Learn moreWorkflow Automation
Auto-text every form submit, missed call, and chat lead within 30 seconds. Set the trigger once, it fires forever.
Learn moreCalendar + Scheduling
AI books the slot live during the first contact. No 'we'll call you back to schedule', no missed window.
Learn moreFrequently asked questions
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Go deeper: industry research & statistics, service pricing guides, and CRM by industry.
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