Every minute you wait,a deal slips away.
A lead who raised their hand five minutes ago is a different person from the one you call tomorrow. This calculator puts a dollar figure on the gap between the speed you have and the speed that wins, using the response-time decay curve the MIT lead-response study made famous.
Your numbers
Inbound leads that need a first response — form fills, demo requests, replies.
How long, on average, before a human actually responds to a fresh lead. In minutes.
Share of leads that convert at your current speed, from first response to closed deal.
Revenue from one closed deal (one-time, or first-year contract value).
The verdict
Deals lost / month
190
Versus hitting the 5-minute rule.
Revenue on the table / mo
$570,000
Conversion at 5-min rule
100.0%
Your current rate, scaled up the decay curve.
Your current conversion
5.0%
Lost / year
$6,840,000
5-min advantage
42.00×
More likely to qualify vs now.
Monthly revenue: now vs. 5-minute rule
Your speed tier
Slow
The 5-minute rule (MIT/InsideSales): respond inside five minutes and a lead is ~21x more likely to qualify than at 30 minutes. The average B2B team takes ~42 hours.
Reverse-solve · the speed you could commit to
Conversion at this speed
100.0%
Extra revenue / mo
$570,000
Move from 60 minutes to 5 and your conversion shifts from 5.0% to 100.0% — about 190.0 more closed deals a month, worth $570,000. You don't need more leads to find this money; you need to answer the ones you have faster.
Sensitivity · the decay curve, in your numbers
What each response time is worth to you
| Response time | Conversion | Deals / mo | Lost vs 5 min |
|---|---|---|---|
| 1 min | 100.0% | 200.0 | — |
| 5 min | 100.0% | 200.0 | — |
| 30 min | 10.0% | 20.0 | $540,000 |
| 1 hour | 5.0% | 10.0 | $570,000 |
| 4 hours | 2.5% | 5.0 | $585,133 |
| 1 day | 1.0% | 2.0 | $594,000 |
| 42 hours | 0.5% | 1.0 | $597,000 |
Same lead pool, same offer — only the response time changes. Each row scales your current 5.0% conversion along the MIT/InsideSales decay curve. The slower the answer, the more of the deal you've already lost before you dial.
Reference · response time → qualification likelihood
| Response time | Qualify likelihood (vs 30 min) |
|---|---|
| Within 1 minute | 24× |
| Within 5 minutes | 21× |
| Within 30 minutes | 1× |
| Within 1 hour | 0.50× |
| Within 1 day | 0.10× |
| B2B average (~42 hours) | 0.05× |
Relative to the 30-minute baseline (= 1.0×), per the Lead Response Management Study. Five minutes is ~21x; the average B2B response time of ~42 hours is a rounding error away from zero.
Your move
I find the leads you already paid for, bleeding out in the queue.
At a 60-min response time you're leaving $570,000/mo on the table — ~190.0 deals lost to slow response.
Most teams don't have a lead problem — they have a response problem, and it hides in plain sight between the form fill and the first call. Send me how you handle inbound today and I'll map exactly where the intent (and the revenue) is leaking, plus the fastest fix. Free, and the plan is yours either way.
Plain English
Speed-to-lead is the first race you can actually win.
Speed-to-lead is the time between a prospect raising their hand and a human responding. It's the most ignored number in the funnel and one of the most decisive: the MIT/InsideSales Lead Response Management Study found that calling a lead within five minutes makes them about 21 times more likely to qualify than waiting just 30 minutes, and roughly 100 times more likely to even be reached.
The reason is intent. The moment someone fills out your form, they are leaning in — tab open, problem top of mind, comparing you against the two competitors they messaged at the same time. Velocify found that 78% of buyers go with the company that responds first. Wait an hour and that intent has cooled; wait the B2B average of about 42 hours and you're calling a stranger about a problem they've half-forgotten.
This calculator turns that decay into money. You give it your real response time, lead volume, conversion rate, and deal size; it models how many of those leads you're losing purely to slowness, and what that's worth every month. The fix is rarely more leads — it's answering the ones you already paid for, faster.
The formula
Lost revenue = (potential conversion − current conversion) × leads × avg deal value
200 leads/month, $3,000 deals, converting at 5% with a 60-minute response time. The decay curve says hitting the 5-minute rule would lift that conversion to roughly its fast-tier ceiling — call it ~9.5%. That's an extra ~4.5 deals a month you're leaving on the table, worth about $13,500 every single month, on leads you've already paid to generate.
What speed is worth: the response-time decay curve
Respond inside five minutes and a lead is roughly 21 times more likely to qualify than at the 30-minute mark — and ~100x more likely to be reached. Likelihood is shown relative to the 30-minute baseline (= 1.0×); the drop-off past an hour is brutal:
| Response time | Likelihood to qualify (vs 30 min) |
|---|---|
| Within 1 minute | 24× |
| Within 5 minutes | 21× |
| Within 30 minutes | 1× |
| Within 1 hour | 0.50× |
| Within 1 day | 0.10× |
| B2B average (~42 hours) | 0.05× |
Source: Lead Response Management Study (Oldroyd, MIT/InsideSales) + Velocify · 2025
Your speed-to-lead is slow. Where's the leak?
Leads sit in a shared inbox or CRM queue.
Nobody owns the first minute, so nobody acts in it. Round-robin assignment with instant push notifications beats any reminder workflow. Ownership in seconds, not a task due 'today.'
You respond fast in business hours, dead after.
Half your leads arrive when no one's watching. An instant auto-reply that books a time, plus an after-hours rep or AI qualifier, recovers the nights-and-weekends leak most teams pretend doesn't exist.
First touch is an email, not a call.
Email response feels fast but converts slow. Velocify found calling within a minute lifts conversions ~391%. Call first, email as backup — the phone is the 5-minute-rule channel.
Reps 'get to leads' in batches.
Batching is the enemy of speed-to-lead. A lead worked at 9am and 2pm sweeps loses the intent window every time. Trigger the first attempt the instant the form fires.
How to win the first five minutes
01Instant lead assignment
Auto-route every new lead to a rep in seconds with a push, not a digest. The clock starts the moment the form submits — own that moment.
02Call first, then email
The phone is where the 5-minute rule lives. Calling within a minute can lift conversions nearly 4x versus a slower email-led touch.
03Cover nights and weekends
A huge share of leads arrive off-hours. An after-hours rep, an AI qualifier, or an instant self-book link stops the overnight bleed.
04Auto-book, don't auto-thank
Replace the 'thanks, we'll be in touch' page with a live calendar. A booked call beats a fast email that still waits for a human.
05Speed-to-lead SLA
Set a hard standard (under 5 minutes, business hours) and report it weekly. What gets measured gets answered.
06Kill the form friction
Every extra field delays the handoff and the response. Capture the minimum, qualify on the call, not the form.
07Persist past attempt one
Most reps quit after one or two tries. Six to eight attempts in the first days dramatically lifts contact and conversion.
08Prioritize hot over old
A 2-minute-old lead outranks yesterday's follow-up. Work the freshest intent first, always.
The vocabulary
- Speed-to-lead
- The elapsed time between a lead's inquiry and your first human response. The lower, the better.
- The 5-minute rule
- Respond within five minutes and a lead is ~21x more likely to qualify than at 30 minutes (MIT/InsideSales study).
- Lead response time
- Same idea as speed-to-lead, measured to first meaningful contact (a call answered, a reply sent).
- Qualification likelihood
- The relative odds a lead becomes a qualified opportunity, which collapses sharply as response time grows.
- First responder advantage
- 78% of buyers choose the company that responds first. Being fastest is often the whole sale.
- Speed-to-lead SLA
- An internal commitment (e.g. under 5 minutes) to respond, tracked and enforced like any other metric.
Speed-to-lead questions, straight answers
Respond within five minutes. The MIT/InsideSales Lead Response Management Study found that contacting a lead inside five minutes makes them about 21 times more likely to qualify than waiting 30 minutes, and roughly 100 times more likely to be reached at all. Five minutes is the line where intent is still hot.
Keep going
A calculator tells you what. A call tells you what to do about it.
Send me the account behind these numbers. I'll tell you straight where the money's leaking and what I'd fix first — free, and you keep it whether you hire me or not.