A 60-second calculator that turns "we should be faster with leads" into a dollar number. Plug in four inputs, see what every hour of delay is worth — and what going from 1 day to 1 hour would put back on your books.
Owners spend months arguing about ad copy, landing pages, and offers — meanwhile a hot inbound lead sat for 14 hours before anyone called back. The lever that moves the needle isn't tactical. It's how fast you reach out the moment a stranger raises their hand.
The data is brutal and it's not new. Multiple studies — the Harvard Business Review work by James Oldroyd, Lead Response Management research, and InsideSales / Drift's tracking of thousands of inbound funnels — all point at the same curve: response time and conversion are violently correlated, and the cliff is in the first hour.
That's the lever this calculator measures.
Be honest. Use trailing-90-day lead volume, your real average deal value, and your actual response time — not the one you tell yourself you have. Time it across your last 10 leads if you're not sure.
Same lead volume, same deal size, same baseline close rate — only response time changes. Your current tier is highlighted in hotpink; the <5-min target is in lime. Everything else is money on the table.
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The calculator is built on a single empirical observation: close rate decays as response time grows, and the decay is steepest in the first hour. We apply a decay multiplier to your baseline close rate (the rate you'd hit responding within 5 minutes), then compute revenue at each tier.
The formula: monthly revenue = leads × (baseline_close_rate × decay) × avg_deal_value. Lost revenue = revenue at < 5 min minus revenue at your current tier.
About the multipliers: these are deliberately moderate. The original Oldroyd research found a 7× difference in qualifying a lead within 1 hour vs. 2 hours, but "qualifying" and "closing" aren't the same — close-rate decay is real but less violent. The multipliers above are anchored to what we've seen across hundreds of small-business funnels, biased slightly conservative on purpose. If anything, your actual decay is probably worse than the calculator shows.
The dollar number above doesn't matter unless you change something. Here's the playbook by who you are — what target to hit and the cheapest way to hit it.
Your target: < 5 minutes during business hours, < 30 minutes after-hours. Anything slower and the prospect calls the next contractor on Google.
Your target: < 1 hour during business hours, < 4 hours after-hours. Agency sales cycles are longer, but the first-responder advantage still rules.
The math above is just the math. Most owners don't lose to math — they lose to one of these.
An auto-confirmation email is not a response. A real reply from a human within 5 minutes is. If your "response time" is measured by when you sent an autoresponder, you're tracking the wrong thing — and your prospect knows it.
Solo founders feel like they have to be the one to answer. So leads sit until 9 PM when they finally check email. Route inbound to a shared inbox or Slack channel that anyone on the team can answer — or to an SDR/VA. Your night is not worth the deal.
Tomorrow they're a customer of someone else. The calculator above shows it in dollars: a 24-hour response loses roughly 75% of the revenue you'd have at < 5 minutes. Tomorrow-mindset is the most expensive habit in small-business sales.
Roughly half of inbound leads arrive outside business hours. If your response model is "M–F, 9–5," half your funnel is on a 16-hour delay before a human even sees it. A rotating on-call, an SMS auto-reply, or an after-hours booking link — pick one. Not zero.
"We're pretty fast" is what almost every owner says. When we actually measure it, the median is around 10 hours. If you don't have a number you can show your team weekly, you're optimizing for a feeling — and feelings don't move money.
A 60-second reply that reads as automated, panicked, or pushy is worse than a 30-minute thoughtful one. Speed wins, but warmth wins more. The script: short, personal, names a specific thing from their inquiry, offers a calendar link or a quick call. Fast and human, not fast and frantic.
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