Lead response time ROI calculator
Estimate how much revenue slow lead follow-up costs your business every year, based on how long leads currently wait for a first reply.
At your current response time, you are estimated to capture $1,500 a month in new business, compared to $10,000 if every lead heard back within the hour.
How to use
- 1Enter your monthly leads
Count the web enquiries you get in a typical month: form fills, calls from the site, chat conversations.
Example: 100.
- 2Set your close rate
Of those leads, what percent become paying customers when you follow up well?
Example: 20 means 1 in 5.
- 3Add your average deal value
The revenue from one closed customer.
Example: 500 for a $500 job.
- 4Pick your current response time
How long, honestly, before a new lead hears back today. The slower it is, the more the calculator shows slipping away.
Tips & best practices
- Use a normal month, not your best one.
- Response time means first human (or bot) reply, not full resolution.
- If you are not sure of close rate, start at 20% and adjust.
What this tool does / does not do
- Estimates revenue lost to slow follow-up
- Uses the same response-time research cited across our site
- Runs entirely in your browser
- Track or store anything you type
- Replace your real CRM numbers
- Guarantee a specific result
Keep improving your lead flow
Continue with a related free tool to find friction in your website, response process, or campaign tracking.
- After-Hours Missed Leads CalculatorFind out what leads who visit after closing time are worth.
- Speed-to-Lead GraderAnswer six questions and get a letter grade on your response speed.
- Chatbot Payback CalculatorWork out how fast a chatbot pays for itself against staff time.
- No-Show Cost CalculatorTurn your appointment no-show rate into a yearly dollar figure.
Sources and guidance
Use these primary references to validate the guidance behind this tool; your result still depends on the values you enter.
Questions, answered.
They are illustrative figures based on the widely cited 2011 Harvard Business School and InsideSales.com study on lead response time, which found qualification odds fall sharply after the first hour. Treat the output as a directional estimate, not an audited figure for your business.
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