What is speed to lead?
Speed to lead is the time between a prospect expressing interest — submitting a form, calling, or messaging — and the business's first response. Research from Harvard Business Review and Lead Connect consistently shows that responding within 5 minutes makes a lead 21x more likely to convert than responding after 30 minutes. The drop-off is steep: at 5 minutes, conversion is ~30% lower than at 1 minute; at 30 minutes, conversion is 80%+ lower than at 1 minute. Most service businesses respond to inbound leads in 30-90 minutes — well past the conversion-decay cliff. Sub-minute response (Aira answers calls in 0.4 seconds; SMS callbacks fire automatically) wins every time the prospect is comparing multiple vendors. Speed to lead is the single highest-leverage metric in inbound conversion for service businesses. See the full speed-to-lead playbook.
Speed-to-lead conversion math
These numbers come from third-party studies of inbound lead response time across multiple industries. The pattern holds across professional services, contracting, retail, and B2B SaaS.
- 1-minute response → conversion rate
- Baseline (highest)
- 5-minute response → conversion rate
- ~30% drop vs 1-minute
- 30-minute response → conversion rate
- 21x worse than 5-minute response (HBR)
- Typical SMB response time
- 30-90 minutes — past the cliff
- Aira inbound answer time
- 0.4 seconds — first ring
- Why prospects ghost
- 62% of unanswered business calls do not result in a callback
How to calculate speed to lead
Speed to lead = (timestamp of business's first response) − (timestamp of prospect's inbound). For phone calls, the inbound timestamp is when the phone starts ringing; the response timestamp is when someone answers (human or AI). For form fills and chats, the inbound timestamp is the form submit; the response is the first outbound contact (call, email, text). Average across all leads in a 30-day window for a directional read.
Service businesses typically have two response-time problems. First, after-hours calls roll to voicemail and aren't returned until the next business day — speed to lead measured in hours, not minutes. Second, peak-hour calls hit busy signal — same outcome. AI receptionists collapse both problems to the same answer: every inbound gets a sub-second answer, qualification, and callback or booking, regardless of time of day or call volume.
Related questions
- What is the cost of a missed lead?A missed lead costs roughly the lifetime value of one new customer in expected value terms — typically $200-$2,500 for service businesses. Here's the math.
- How can AI qualify leads automatically?AI qualifies inbound leads by capturing service, location, budget, and timing fields on the call, scoring against your criteria, and routing — all in real time.
- What is lead qualification?Lead qualification is the process of deciding whether a new prospect is worth pursuing. Here's how it works for service businesses and what counts as qualified.